17.2 Female Genital and Outpatient Maternity Procedures

17.2 Female Genital and Outpatient Maternity Procedures

Quick Answer: Diagnostic hysteroscopy (58555) is a separate procedure. Surgical hysteroscopy with endometrial sampling and/or polypectomy, with or without D&C, is 58558—do not add 58120 or 58555. Nonobstetric D&C without a hysteroscope is 58120. Postpartum curettage is 59160. Missed abortion, first trimester, completed surgically is 59820; incomplete abortion completed surgically is 59812. Laparoscopic adnexal removal is 58661; laparoscopic ectopic with salpingectomy is 59151. Loop conization with colposcopy is 57461. Outpatient maternity also includes 59320 (vaginal cerclage) and 59412 (external cephalic version). Do not treat cesarean delivery as a hospital outpatient or ASC coding problem for the COC.

OpenExamPrep's independent teaching in this section is for facility outpatient female-genital and selected obstetric procedures that appear on SDS and ASC schedules. It does not replace the ICD-10-CM Chapter 15 rules already covered in the injury-and-factors chapter; it applies those O codes to the CPT families you will actually report.

Why gynecology and outpatient maternity sit beside urinary surgery

The same AAPC surgery-and-modifiers domain that drives cystoscopy items also tests hysteroscopy, laparoscopic ovary and tube work, cervical excision, and the small set of obstetric procedures that occur without an inpatient delivery. NCCI Chapter VII covers CPT 50000–59999, including female genital and maternity. The endoscopy rule does not change: surgical endoscopy includes diagnostic endoscopy at the same encounter. A coder who bills 58555 with every polypectomy, or 58120 for a suction D&C of a missed abortion, misses the distinction the exam is built to catch.

Inpatient labor, cesarean, and postpartum rounds on a type of bill 11X claim are not the COC outpatient skill. If a vignette is clearly a cesarean in the operating room after admission, you are in the wrong site of service—do not hunt for 59514 as an OPPS line.

Hysteroscopy

Hysteroscopy is intrauterine visualization. 58555 is diagnostic hysteroscopy (separate procedure): the surgeon inspects the cavity and ostia and does not perform a listed surgical act. When the same session includes endometrial biopsy, polypectomy, or D&C, the surgical code is 58558. That descriptor already says with or without D&C. Reporting 58120 with 58558 is unbundling. Reporting 58555 with 58558 is the same diagnostic-into-surgical error you already applied to 52000.

Other surgical hysteroscopy families are selected by what was removed or destroyed, not by the fact that a camera was used:

Report 58558 once per session no matter how many polyps were removed. Laterality does not apply to a single uterine cavity. If ablation is the definitive listed service, do not unbundle a sampling code to capture "we biopsied first."

A hysteroscope used during surgical treatment of incomplete or missed abortion does not convert the case to 58558. Those evacuations stay in the maternity 59812 / 59820 / 59821 families. 58558 is a nonobstetric intrauterine surgical endoscopy code.

D&C: diagnostic versus postpartum versus miscarriage

Dilation and curettage is not one CPT line for every scraped uterus. Read why the endometrium or products of conception were removed and whether a pregnancy is or was recently present.

58120 is explicitly nonobstetrical. Using it for a suction D&C of retained pregnancy tissue is the classic trap. 59160 is postpartum curettage after delivery—not a first-trimester miscarriage in a patient who never delivered a neonate. 59820 is missed abortion, first trimester, completed surgically; 59812 is incomplete abortion completed surgically. Add Z3A.- weeks of gestation when weeks are documented, following Section I.C.15 and the prior ICD chapter. Do not first-list Z34.- supervision for a surgical evacuation.

Induced (elective) abortion families such as 59840 (D&C) are a different CPT path from spontaneous or missed abortion. Code from the documented type of pregnancy loss or termination; do not swap 59840 onto a missed-abortion SDS note.

Laparoscopic adnexal surgery

Diagnostic laparoscopy of the abdomen (49320) is a separate procedure. Surgical laparoscopy of the adnexa replaces it. 58661 is laparoscopic removal of adnexal structures (partial or total oophorectomy and/or salpingectomy). 58662 is laparoscopic fulguration or excision of lesions of the ovary, pelvic viscera, or peritoneal surface—endometriosis implants and ovarian cystectomy-type lesion work when that is what was done without removing the tube or ovary as an organ. Removing a left ovary is 58661-LT, not 58662 plus an "incidental" ovary. 58670 and 58671 are laparoscopic occlusion of the oviducts (device versus fulguration) for sterilization; they are not salpingectomy.

Laterality belongs on paired ovaries and tubes. A left ovarian cystectomy is not unspecified adnexa. Modifier 50 or RT/LT follows payer instructions when both sides are surgically treated. A diagnostic look at the contralateral ovary is not a second 58661.

Ectopic pregnancy has its own maternity surgical families. Laparoscopic treatment without salpingectomy/oophorectomy is 59150; with salpingectomy and/or oophorectomy is 59151. Open abdominal or vaginal treatment with organ removal is 59120. Do not report generic 58661 when the operation is surgical treatment of an ectopic pregnancy. First-listed diagnosis uses O00.- with laterality when the subcategory provides it (for example O00.102 left tubal pregnancy without intrauterine pregnancy) plus Z3A.- when weeks are known—exactly as the ICD chapter taught for SDS laparoscopic salpingectomy of a left tubal ectopic.

NCCI Chapter VII laparoscopy rules match the digestive chapter: surgical laparoscopy includes diagnostic laparoscopy. Conversion from laparoscopy to open reports the open procedure, not both.

Selected laparoscopic hysterectomy codes (58570–58573 by uterine weight and whether tubes/ovaries are removed) can appear in the HOPD when the case is clinically outpatient. They are still not cesarean codes. If the note is a laparotomy total abdominal hysterectomy on an admitted inpatient, you are outside OPPS. This section does not treat cesarean or laparotomy obstetric hysterectomy as ASC work.

LEEP and cone

Cervical excision splits on whether a complete colposcopy of the cervix and upper/adjacent vagina was performed and on biopsy versus conization versus cold knife.

57460 and 57461 require examination of the entire cervix and the upper adjacent vagina with the colposcope. If the note never describes that survey and simply records a loop cone in the operating room, 57522 is the better LEEP family. Do not add a separate endocervical curettage or cervical biopsy code for work already listed in the conization descriptor you selected.

Maternity outpatient: cerclage, miscarriage D&C, version—not cesarean

59320 is cerclage of the cervix during pregnancy, vaginal approach. 59325 is the abdominal approach and is a heavier operation; do not assume it is an ASC case. First-listed diagnosis is maternal care for cervical incompetence (O34.3- with the trimester character), plus Z3A.- when weeks are documented. Do not first-list a Z-code for elective cervical stitch when Chapter 15 owns the encounter.

External cephalic version, with or without tocolysis, is 59412. It is an outpatient or hospital procedure-room service when the patient is not being delivered. Diagnosis is typically maternal care for malpresentation (for example breech O32.1-) with weeks. If version fails and the patient is admitted for cesarean, the cesarean itself is inpatient—still not an OPPS COC line. Do not add a delivery CPT to a version-only SDS visit.

Miscarriage surgery uses 59812 / 59820 / 59821 as tabled above, with O03.- or O02.1, not 58120.

Cesarean delivery (59510, 59514, 59515, and related inpatient delivery families) is not a hospital outpatient or ASC procedure for this exam. Do not spend COC study time building a C-section coding tree. If a case mix includes observation of threatened preterm labor that never reaches delivery, you are in E/M, ultrasound, and O diagnosis sequencing—not a 59514 APC.

Mini-op-note (hospital SDS / ASC)

Pre-op: postmenopausal bleeding; endometrial polyp. Procedure: diagnostic hysteroscopy; 2 cm fundal polyp removed with hysteroscopic grasper; sharp D&C. Facility coding: 58558 only. Do not add 58555 or 58120.

A second SDS example: 9 weeks, missed abortion, suction D&C, no laparoscopy, no delivery. Report 59820. First-listed O02.1 plus Z3A.09 when 9 weeks is documented. Do not use 58120 or 59160.

A third SDS example: CIN 2; colposcopic survey of the entire cervix and upper vagina; loop electrode conization. Report 57461, not 57522 and not 57520.

A fourth example: 12-week cervical insufficiency, vaginal McDonald cerclage, discharged the same day. Report 59320 with O34.31 (first trimester) and Z3A.12 when 12 weeks is documented.