Welcome to your one‑stop resource for OB GYN coding! This cheat sheet is designed specifically for medical coders and offers practical tips and code examples to streamline the billing process while maximizing accuracy.
1. Commonly Used OB GYN ICD 10 CM Codes
Pregnancy and Obstetric Care
• Z34.01: Supervision of normal first pregnancy, first trimester
• Z34.82: Supervision of other normal pregnancy, second trimester
• O09.891: Supervision of other high risk pregnancy, third trimester
• Z3A.00 to Z3A.49: Weeks of gestation (mandatory with pregnancy related claims)
• O36.4XX0: Maternal care for intrauterine death
• Z34.01: Supervision of normal first pregnancy, first trimester
• Z34.82: Supervision of other normal pregnancy, second trimester
• O09.891: Supervision of other high risk pregnancy, third trimester
• Z3A.00 to Z3A.49: Weeks of gestation (mandatory with pregnancy related claims)
• O36.4XX0: Maternal care for intrauterine death
Gynecological Conditions
• N80.0: Endometriosis of the uterus
• N93.9: Abnormal uterine and vaginal bleeding, unspecified
• R87.610: High risk HPV DNA test positive
• N97.1: Female infertility due to ovulatory dysfunction
2. Top OB GYN CPT Codes
Gynecological Procedures
• 57100: Biopsy of vaginal mucosa
• 58100: Endometrial biopsy without ultrasound guidance
• 58300: Insertion of intrauterine device (IUD)
• 57454: Colposcopy of the cervix with biopsy and endocervical curettage
Q: Are ultrasounds part of the global OB package?
A: No. Obstetric ultrasounds (eg, CPT 76805) are billed separately even for patients receiving global care
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