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Urology — OHIP Billing Codes
Urological procedures and assessments · Schedule of Benefits
All 498 Urology codes (S codes)
Complete alphabetical list of OHIP S-prefix billing codes from the Ontario Schedule of Benefits.
- S000S000
- S002Excision of parapharyngeal space lesions (with mobilization of parotid gland)
- S003Excision of lesion of oral cavity and pharynx - 2 to 4 cms, inclusive
- S004Ranula
- S005Composite resection of lesion of oral cavity and/or oropharynx with partial resection of mandible
- S006Excision of lesion - over 4 cms
- S007Extended composite resection of lesion of oral cavity and oropharynx with partial resection of mandible and resection of maxilla
- S010Wedge resection of lip with plastic repair
- S011Wedge resection of lip - vermilion
- S012Lip shave vermilionectomy
- S013Cleft lip - unilateral
- S014Reconstruction with lip switch flap
- S015Complex reconstruction or revision of previous repair and excision
- S018Partial glossectomy
- S020Glossoplasty
- S021Repair of extensive laceration
- S023Extraction of tooth - single
- S024Excision of torus palatinus
- S028Dentigerous cyst
- S030Closure of fistula - anterior alveolar
- S031Palatal fenestration
- S032Bone graft to palate
- S033Closure of fistula - palate
- S034Cleft palate repair
- S035Removal of sutures under general anaesthesia
- S036Uvulopalatopharyngoplasty (includes tonsillectomy)
- S042Submandibular gland or sublingual gland
- S043Parotid gland - total (with preservation of facial nerve)
- S044Parotid gland - total (without preservation of facial nerve)
- S045Parotid gland - subtotal (with preservation of facial nerve)
- S047Parotid gland - repeat subtotal (with preservation of facial nerve)
- S049Plastic repair of duct
- S050Cryotherapy for treatment of pre-malignant or malignant lesions of oral cavity or sinuses
- S057Submandibular duct relocation
- S058Branchial cleft lesion
- S059Branchial cleft lesion - repeat procedure
- S061Thyroglossal duct remnant
- S062Thyroglossal duct remnant - repeat procedure
- S063Tonsillectomy and may include adenoidectomy
- S065Adenoidectomy
- S066Secondary suture or cauterization following tonsillectomy and/or adenoidectomy
- S067Partial pharyngectomy
- S068Pharyngo-laryngectomy
- S069Pharyngoplasty
- S073Cervical approach
- S074Thoracic approach
- S075Abdominal approach
- S079Massive paraesophageal hernia repair
- S080Oesophageal-gastric devascularization
- S081Trans-oesophageal division of oesophageal varices
- S082Intrathoracic oesophageal stent - via laparotomy
- S083Intrathoracic oesophageal stent - via oesophagoscope
- S084Oesophagostomy, Cervical - other than neonatal
- S085Oesophagostomy, Cervical - neonatal
- S086Cricopharyngeal myotomy, open approach
- S087Intrathoracic diverticulum
- S088Cricopharyngeal diverticulum
- S089Partial oesophageal resection and reconstruction
- S090Total thoracic oesophageal resection
- S091Oesophageal hiatus hernia - abdominal or transthoracic approach with fundal plication
- S092Oesophageal hiatus hernia - recurrent
- S093Enucleation of benign oesophageal tumour
- S095Oesophageal stricture (Thal)
- S096Ruptured oesophagus, suture and drainage
- S097Oesophago-gastrostomy for bypass
- S098Oesophageal bypass, abdomen to neck - with stomach
- S099Oesophageal bypass, abdomen to neck - with colon or jejunum
- S100Total thoracic oesophageal myotomy
- S103Closure of H-type tracheo-oesophageal fistula
- S104Repair of oesophageal atresia with or without tracheal fistula
- S113Removal of gastric band
- S114Sleeve gastrectomy
- S115Reversal of previous vertical banded gastroplasty
- S116Gastrotomy - with removal of tumour or foreign body
- S117Pyloromyotomy (Ramstedt's)
- S118Gastrostomy
- S120Gastric bypass with Roux-en-Y anastomosis, for morbid obesity
- S121Transabdominal vagotomy after previous vagotomy
- S122Wedge resection for ulcer
- S123Partial or subtotal gastrectomy - distal
- S124Vagotomy - highly selective
- S125Partial or subtotal gastrectomy - proximal
- S128Total gastrectomy - with or without splenectomy
- S129Conversion of previous gastrectomy to Roux-en-y
- S131Vagotomy - truncal or selective
- S132Pyloroplasty
- S133Pyloroplasty and vagotomy
- S134Gastroduodenostomy or gastrojejunostomy
- S137Pyloroplasty or gastroenterostomy plus vagotomy and cholecystectomy
- S138Closure of gastrostomy or other external fistula of stomach
- S139Gastrorrhaphy
- S140Closure of gastrocolic fistula
- S149Ileostomy
- S150Small intestine - including excision of polyps or biopsy
- S151Insertion of feeding enterostomy
- S152Bowel lengthening procedure in a paediatric patient
- S154Large intestine - including excision of polyps
- S155Colonoscopy with laparotomy
- S156Exteriorization of intestine (Mickulicz)
- S157Colostomy
- S158Cecostomy
- S159Meckel’s diverticulum excision - with small bowel resection
- S160Entero-enterostomy
- S161Oesophageal myotomy, partial (below aortic arch)
- S162Local excision of lesion of intestine
- S164Resection with anastomosis - duodenum
- S165Resection with anastomosis - small intestine - other
- S166Small and large intestine terminal ileum, cecum and ascending colon (right hemicolectomy)
- S167Large intestine - any portion
- S168Subtotal colectomy
- S169Total colectomy with ileo-rectal anastomosis
- S170Ileostomy - plus total colectomy plus abdomino-perineal resection
- S171Left hemicolectomy with anterior resection or proctosigmoidectomy
- S172Total colectomy with mucosal proctectomy with ileal pouch, ileoanal anastomosis and loop ileostomy
- S173Intestines - abdominal
- S174Intestines - perineal
- S175Intestinal obstruction (mechanical) - without resection
- S176Intestinal obstruction (mechanical) - with entero-enterostomy
- S177Intestinal obstruction (mechanical) - with resection
- S178Intestinal atresia (newborn)
- S179Meconium ileus
- S180Intestinal obstruction (mechanical) - with enterotomy
- S181Revision of ileostomy or colostomy - skin level
- S182Revision of ileostomy or colostomy - full thickness
- S183Cecopexy or sigmoidopexy
- S184Suture of intestine
- S185Closure of colostomy or enterostomy
- S187Plication of small intestine for adhesions
- S188Bowel resection without anastomosis (colostomy and mucous fistula)
- S189Intestinal bypass for morbid obesity
- S191Complete reconstruction of continent ileostomy to include valve repair
- S192Simple revision of continent ileostomy pouch
- S193Revision of standard ileostomy into continent ileostomy pouch
- S194Meckel’s diverticulum excision
- S195Local excision of lesion
- S196Multivisceral transplant - donor
- S197Multivisceral transplant - recipient, without evisceration
- S199Resection of mesentery
- S201Small bowel transplant - donor
- S202Small bowel transplant - recipient
- S203Insertion of peritoneo-jugular shunt for ascites - primary
- S204Incision and drainage of abscess
- S207Appendectomy
- S209Insertion of peritoneo-jugular shunt for ascites - revision
- S210TaTME with proctosigmoidectomy and anastomosis below peritoneal reflection - one surgeon technique
- S211TaTME with proctosigmoidectomy and anastomosis below peritoneal reflection - abdominal surgeon
- S212S212
- S213Anterior resection or proctosigmoidectomy
- S214Abdomino-perineal resection or pull through
- S215Abdominal surgeon for abdomino-perineal resection or pull through
- S216Perineal surgeon
- S217Hartmann procedure
- S218Colon reconstruction following Hartmann procedure
- S222Presacral or trans-sacral proctotomy and excision of lesion
- S223Anastomosis of rectum
- S225Rectum - excision of mucous membrane
- S226Perineal repair - major
- S227Rectum repair - abdominal approach
- S228Insertion of Thiersh wire
- S229Suture of rectum, trauma-external approach
- S231Rectovaginal fistula repair
- S233Percutaneous trans-hepatic catheter drainage of obstructed bile ducts
- S234Replacement of percutaneous trans-hepatic catheter
- S236Linear or radial echo-endoscope - excluding biliary or pancreatic examination
- S237Linear or radial echo-endoscope - including biliary or pancreatic examination
- S241Sphincterotomy(ies) under local anaesthesia
- S243Sphincterotomy(ies) under general anaesthesia
- S247Haemorrhoidectomy
- S248Peter Lord procedure
- S249Local excision for malignancy
- S250LIFT and/or ERAF for definitive repair of fistula
- S251Fistula-in-ano - exploration of fistula tract and insertion of Seton drain and/or fistulotomy
- S253Low imperforate anus repair
- S256Excision of scar, for stenosis
- S257Anoplasty, for stenosis
- S258ARepair of Anal Sphincter - Surgeon
- S258BRepair of Anal Sphincter - Assistant
- S258CRepair of Anal Sphincter - Anaesthesia
- S259Repair of anal sphincter and ano-rectal ring
- S260High imperforate anus repair (supra-levator)
- S265Living donor, hepatectomy
- S266Living donor, orthotopic liver transplant
- S267Hepatectomy, three or four liver segments
- S268Insertion of implantable pump for continuous liver perfusion
- S269Local excision of liver lesion (less than 5 cm)
- S270Hepatectomy, one or two liver segments
- S271Hepatectomy, five or more liver segments
- S272Laparotomy, cholangiogram and biopsy (neonatal jaundice)
- S273Marsupialization and/or decompression of cyst(s) or abscess(es)
- S274Deceased donor, liver removal
- S275Partial lobectomy (excision greater than 5 cm)
- S276Choledochotomy (previous cholecystectomy)
- S278Cholecystostomy
- S280Transduodenal sphincterotomy and choledochotomy (previous cholecystectomy)
- S281Choledochoduodenostomy or choledochoenterostomy or choledochocholechostomy
- S282Cholecystogastrostomy
- S283Cholecystoenterostomy
- S285Intrahepatic choledochoenterostomy
- S286Completion cholecystectomy
- S287Cholecystectomy
- S291Choledochectomy for tumour
- S292Common duct stricture, dissection and/or resection
- S293Biliary duct atresia, infant
- S294Deceased donor, liver transplant
- S295Repeat liver transplant
- S297Drainage of acute pancreatitis or abscess or marsupialization of cyst
- S298Complete with splenectomy
- S299Distal pancreatectomy - body, tail with preservation of spleen
- S300Whipple type procedure
- S301Local complete excision of tumour or lesion
- S302Donor pancreas removal
- S303Back-bench pancreas graft preparation
- S304Lateral pancreatoduodenostomy or anastomosis of filleted pancreatic duct to intestine (Puestow)
- S305Pancreatic cyst - gastrostomy
- S306Pancreatic cyst - duodenostomy
- S307Pancreatic cyst - jejunostomy
- S308Pancreas transplant
- S309Distal, left-sided or central pancreatectomy
- S310Insertion of intraperitoneal chemotherapy port by laparotomy or laparoscopy
- S311Umbilical vein intra-abdominal dissection and catheterization
- S312Laparotomy
- S313Peritoneal abscess - subphrenic
- S314Peritoneal abscess - abdominal
- S315Removal of intraperitoneal chemotherapy port by laparotomy or laparoscopy
- S316Excision of full thickness abdominal wall tumour and primary closure
- S317Umbilectomy - plastic
- S318Panniculectomy
- S319Mesenteric cyst
- S320Insertion of antabuse into abdominal wall
- S321Laparotomy for acute trauma
- S322Inguinal and/or femoral hernia repair - infants
- S323Inguinal and/or femoral hernia repair - adolescents and adults
- S324S324
- S325Omentopexy
- S326Inguinal and/or femoral hernia repair - children
- S328Unilateral inguinal or femoral hernia repair with exploration of other side - infants and children
- S329Strangulated or incarcerated inguinal or femoral hernia - without resection of bowel
- S330Strangulated or incarcerated hernia - with resection of bowel
- S332Umbilical hernia repair - adolescent or adult
- S333Umbilical hernia repair - child
- S340Hernia fascial defect repair
- S342Epigastric hernia repair
- S343Secondary closure for evisceration - sole operative procedure in abdomen
- S344Hernia fascial defect (diameter 5 cm or greater) repaired with mesh closure
- S345Massive sliding inguinal hernia
- S346Congenital diaphragmatic hernia - Primary or first stage repair
- S347Congenital diaphragmatic hernia - Second or subsequent stage repair
- S348Omphalocele and gastroschisis - Primary or first stage repair
- S349Omphalocele and gastroschisis - Second or subsequent stage repair
- S350Image-guided transcatheter embolization for active gastrointestinal bleeding
- S351S351
- S400Laparoscopic placement of probe(s) for ablation of renal tumour
- S401Drainage of renal or perirenal abscess
- S402Drainage of Perinephric Abscess
- S403Exploration of Renal and Peri-Renal Tissues (With or without Biopsy or Unroofing of Cyst)
- S405Nephrolithotomy or pyelolithotomy
- S408Pyelolithotomy - Open
- S410Calycectomy with Diversion of Urine
- S411Partial or heminephrectomy
- S412Nephrectomy - Ectopic Kidney
- S413Nephrectomy - Lumbar
- S415Nephrectomy - Transperitoneal
- S416Nephrectomy
- S420Nephroureterectomy, total, with resection of ureterovesical junction
- S422Pyeloplasty
- S423Partial or Heminephrectomy with Total Ureterectomy
- S424Extrophy - plastic closure of bladder with closure of abdominal wall and urethral lengthening with closure of pelvic floor with or without reimplantation of ureters
- S427Bladder flap (Boari) - to include re-implantation of ureter
- S428Symphysiotomy for Horseshoe Kidney with or without Nephropexy and Associated Procedures
- S429Ruptured or lacerated kidney - repair or removal
- S430Removal of Staghorn Calculus Filling Renal Pelvis and Calyces - Open, with or without X-Ray Control And/or Anatrophic Nephrolithotomy
- S431Excision of retroperitoneal tumour
- S432Exploration of retroperitoneal tumour
- S433Sacrococcygeal teratoma
- S434Kidney re-transplant
- S435Kidney transplant
- S436Donor nephrectomy
- S437Renal Autotransplantation
- S438Retroperitoneal lymph node dissection for bladder cancer
- S440Cystectomy - with continent urinary diversion
- S441Creation of continent urinary diversion
- S445Ureterotomy, upper 2/3
- S446Ureterotomy - lower 1/3
- S447Ureterotomy - upper 2/3 - where ureter has been previously opened
- S448Ureterotomy, lower 1/3
- S449Ureterectomy, including ureterovesical junction
- S450Ureterectomy, other e.g. partial
- S451Ureterovesical anastomosis or re-implantation unilateral
- S452Ureteroileal conduit
- S453Cystectomy - with ureteroileal conduit
- S454Ureteroureterostomy with ureterectomy and ileal replacement
- S455Ureterointestinal anastomosis - unilateral
- S457Ureteroureterostomy
- S458Ureterostomy, Cutaneous - unilateral
- S459Ureterovaginal fistula
- S460Ureterolysis for periureteral fibrosis - unilateral
- S461Ureteroplasty (Hutch) - unilateral
- S462Ureterointestinal anastomosis - bilateral
- S463Ureterostomy, Cutaneous - with lower third ureterotomy
- S465Immediate repair of traumatic rupture or transection - upper 2/3
- S466Immediate repair of traumatic rupture or transection - lower 1/3
- S467Late repair - upper 2/3
- S468Late repair - lower 1/3
- S470Cystoscopy with manipulation and/or removal of calculus and retrograde pyelogram
- S471Excision of urachal cyst or sinus with or without umbilical hernia repair
- S476Cutaneous vesicostomy
- S478Cystotomy or cystostomy
- S481Cystolithotomy - when sole operative procedure
- S482Cystectomy - partial for tumour or diverticulum
- S483Cystectomy - partial with reimplantation of ureter
- S484Cystectomy - complete, without transplant
- S485Cystectomy - with ureterointestinal transplant
- S488Extrophy - excision of bladder and repair of abdominal wall - inclusive of graft
- S490Cystectomy - partial with reimplantation of ureters
- S491Plastic repair of extrophy using bladder and including skin flaps
- S512Repair of ruptured bladder
- S513Cystoplasty, using intestine
- S518Plastic repair of bladder neck - child
- S519Plastic repair of bladder neck - adolescent or adult
- S521Litholapaxy and removal of fragments
- S522Closure of fistula - External, suprapubic
- S523Vesicovaginal fistula repair - vaginal approach
- S524Vesicovaginal fistula closure - transvesical approach
- S525Rectovesical fistula closure
- S530Urethrotomy - external
- S531Urethrostomy
- S532Urethrotomy - transurethral (visual)
- S535One stage repair and may include skin grafting
- S536Caruncle
- S537Urethral papilloma, single or multiple
- S538Urethrotomy - repeat procedure within 6 months by same surgeon
- S539Insertion of artificial urinary sphincter
- S540Revision or removal of artificial urinary sphincter
- S541Diverticulectomy - male or female
- S542Posterior urethral valve
- S543Prolapse urethra
- S544Urethrectomy - radical
- S545Urethroplasty - first stage - posterior
- S546Repeat procedure for failed retropubic or vaginal surgery for stress incontinence
- S547Removal of foreign body or calculus
- S548Urethral sling
- S549Retropubic urethropexy - primary procedure
- S550First stage - anterior
- S551Suture of rupture, anterior urethra
- S552Posterior urethra - immediate repair
- S553Late repair of posterior urethra
- S554Fistula - penile urethra (diversion of urine extra)
- S555Fistula - perineal urethra
- S556Rectourethral fistula repair with diversion, colostomy and closure of colostomy
- S557Urethrovesicolysis
- S558Second stage urethroplasty
- S561Re-implantation of ureter with extensive tapering with or without ureterolysis
- S562Re-implantation of bifid ureter
- S564Transurethral incision or resection of external sphincter
- S565S565
- S566Revision including removal of prosthesis
- S567Slit of prepuce - newborn
- S568Slit of prepuce - infant
- S569Slit of prepuce - adult or child
- S571Hypospadias or Epispadia - one stage repair with advancement of meatus into glans
- S572Hypospadias or Epispadia - one stage repair into glans using island flap pedicle (penoscrotal)
- S573Circumcision - for patients aged one year or older
- S574Amputation - partial
- S575Amputation - partial with inguinal glands 1 or 2 stages
- S576Amputation - radical with inguinal and femoral glands 1 or 2 stages
- S577Circumcision - for infants less than one year of age
- S578Hypospadias or Epispadia - one stage repair - with meatus to but not into glans
- S579Chordee repair
- S580Plastic reconstruction, urethra
- S581Closure urethro-cutaneous fistula
- S582Repair of penile fracture or traumatic laceration of corpus cavernosum
- S588Surgical removal of prosthesis
- S589Orchidectomy - unilateral
- S590Retroperitoneal lymph node dissection (RPLND) for testicular tumour
- S591Orchidopexy for undescended testis
- S593Exploration for undescended testicle, without orchidopexy
- S595Ruptured testicle
- S596Insertion of testicular prosthesis
- S597Penile prosthesis for impotence
- S598Orchidectomy - unilateral, radical for malignancy
- S599Excision plaque for Peyronies disease
- S600Reduction of torsion of testis or appendix testis and orchidopexy
- S601Spermatocele or spermatic granuloma excision
- S602Epididymectomy - unilateral
- S611Hydrocele excision - unilateral
- S616Abscess or haematocele - and exploration - unilateral
- S618Resection of scrotum
- S623Vasovasostomy and/or vasoepididymostomy - unilateral
- S625Vasovasostomy and/or vasoepididymostomy - including biopsy and vasography
- S626Vasectomy
- S630Hydrocele excision - single
- S631Varicocele excision - single
- S636Vesiculectomy
- S639Laser enucleation of the prostate including morcellation of prostatic tissue
- S644Biopsy, perineal, open operation
- S645Prostatectomy - Perineal
- S646Prostatectomy - perineal with vesiculectomy
- S647Prostatectomy, suprapubic - with or without removal of bladder stones
- S650Prostatectomy - simple, by retropubic or suprapubic approach
- S651Prostatectomy - radical
- S652Staging pelvic lymphadenectomy for prostatic cancer
- S653Laparoscopic radical prostatectomy
- S654Endoscopic removal or destruction of prostatic tissue for residual or regrowth
- S655Endoscopic removal or destruction of prostatic tissue
- S656Transurethral drainage of abscess
- S701Repair of infibulation - resulting from female genital mutilation
- S702Excision of congenital vaginal septum
- S703Vulvectomy - simple
- S704Vulvectomy - radical - without gland dissection
- S706Cyst of Bartholin’s gland
- S707Hymenectomy or hymenotomy
- S708Non-obstetrical injury to vulva, vagina, or perineum
- S709Urethrovaginal fistula repair
- S710Hysterectomy with omentectomy for malignancy
- S712Culdotomy, drainage or needle puncture
- S714Second look exploratory laparotomy including biopsies
- S715Excision of cyst(s) or benign tumour(s)
- S716Anterior or posterior repair
- S717Anterior and posterior repair
- S718Repair of enterocoele and/or vault prolapse
- S719Posterior repair and repair of enterocoele and/or vault prolapse
- S720Anterior repair with or without posterior repair and repair of uterine prolapse
- S721Anterior, posterior repair with excision of cervical stump
- S722Post hysterectomy vault prolapse - repair by vaginal approach
- S723Repair of anal sphincter
- S724Perineorrhaphy
- S725Colpocleisis (LeFort or modification)
- S726Construction of artificial vagina
- S727Ovarian debulking
- S728One surgeon
- S729Ureterovaginal fistula repair
- S730Vaginal surgeon
- S731One surgeon
- S732Vaginal surgeon
- S733Abdominal surgeon
- S735Fimbriolysis
- S736Salpingostomy
- S738Salpingectomy or salpingo-oophorectomy
- S739Fimbriolysis and salpingostomy
- S740Abdominal surgeon
- S741Tubal occlusion or interruption for the purpose of sterilization
- S742Colpectomy
- S743Repair of extensive unilateral or bilateral tubal and peritubal disease - laparotomy
- S744Cervix - cone biopsy
- S745Oophorectomy and/or oophorocystectomy
- S747Para ovarian cystectomy
- S748One surgeon
- S749Vaginal surgeon
- S750Radical resection pelvic and para-aortic nodes for cancer
- S751Abdominal surgeon
- S752Induced abortion - up to and including 14 weeks gestation
- S754Diagnostic curettage
- S756Missed abortion or evacuation of molar pregnancy
- S757Hysterectomy - abdominal - total or subtotal
- S758Hysterectomy with anterior and posterior vaginal repair and including enterocoele and/or vault prolapse repair
- S759Hysterectomy with anterior or posterior vaginal repair
- S760Vaginal sacropexy
- S761Combined abdominal/vaginal approach for vaginal vault prolapse
- S762Radical trachelectomy - excluding node dissection
- S763Radical hysterectomy (Wertheim or Schauta) - includes node dissection
- S764Myomectomy
- S765Amputation of cervix
- S766Amputation of cervix - abdominal
- S767Amputation of cervix - vaginal
- S768Spontaneous abortion, incomplete - including D&C
- S770Hysterotomy
- S772Endometrial ablation
- S774Repair of incompetent cervix - not associated with pregnancy
- S775Unification of double uterus (Strassman)
- S776Staging pelvic lymphadenectomy for carcinoma
- S777Uterine inversion, operative
- S778Presacral neurectomy
- S779Excision of septum
- S780Biopsy of ovaries by laparotomy
- S781Staging Para-aortic lymphadenectomy for carcinoma
- S782Ovary - excision with total omentectomy
- S783Hysterotomy with tubal interruption
- S784Ectopic pregnancy - management by any surgical technique
- S785Induced abortion after 14 weeks of gestation
- S786Abscess
- S787Abscess - surgical
- S788Thyroidectomy - total
- S789Thyroidectomy - subtotal
- S790Thyroidectomy - hemi
- S792Re-exploration of neck for hyperparathyroidism
- S793Thyroidectomy - completion following previous subtotal or hemi-thyroidectomy
- S795Exploration and/or removal, parathyroids or parathyroid tumour
- S796Parathyroid exploration or removal requiring splitting of sternum
- S797Thymectomy
- S798Adrenalectomy - unilateral
- S799Bilateral adrenalectomy, with or without oophorectomy
- S800Unilateral adrenalectomy for pheochromocytoma
- S811Rectus abdominus myocutaneous neovaginostomy
- S812Post hysterectomy vault prolapse - repeat - repair by vaginal approach
- S813Repeat vaginal sacropexy
- S815Tension free vaginal tape mid-urethral sling
- S816Vaginal hysterectomy
- S900Basic units for anaesthesia with any unlisted dental surgical procedure