OB/GYN coding requires precision across prenatal, delivery, postpartum, and gynecological encounters. Global obstetric packages, trimester-specific codes, and procedure-level CPT detail are all critical to accurate billing. This page covers the top ICD-10-CM and CPT codes used by OB/GYN practices across the United States.
Obstetric codes from Chapter 15 (O00–O9A) require a 7th character for the trimester (1, 2, 3) or delivery (4).
Global obstetric package CPT codes (59400, 59510) include all antepartum, delivery, and postpartum services — do not separately bill individual visits included in the global.
Code fetal conditions using Z3A.xx codes (weeks of gestation) as an additional code to all Chapter 15 codes.
Pap smear/cervical cytology (Q0091 or 88141–88175) is a preventive service and may have different patient cost-sharing rules than diagnostic services.
What is the ICD-10 code for a normal prenatal visit?
Z34.00 is used for supervision of a normal first pregnancy in an unspecified trimester. Add Z3A.xx (weeks of gestation) as an additional code. For subsequent pregnancies, use Z34.30–Z34.39.
What does the global OB package include?
CPT 59400 (vaginal) and 59510 (cesarean) global packages include all antepartum visits from 4 weeks to delivery, the delivery, and the postpartum visit. Individual E&M visits during this period should not be billed separately to the same payer unless complications arise.
What ICD-10 code is used for menopause?
N95.1 covers menopausal and female climacteric states, including hot flashes, insomnia, and mood changes related to menopause. Z78.0 (Asymptomatic menopausal state) is used when there are no symptoms.
When is 57455 (colposcopy with biopsy) billed?
57455 is billed when the physician performs a colposcopy and takes a cervical biopsy during the same session. If no biopsy is taken, use 57420 (colposcopy without biopsy). Separate codes exist for ECC (57456) and LEEP (57461).
How does OmniMD support OB/GYN practices?
OmniMD’s OB/GYN EHR provides trimester-aware documentation templates, global OB package tracking, and integrated e-prescribing for prenatal vitamins and obstetric medications with cross-check for contraindicated drugs.
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