OB/GYN Taxonomy Codes: 207V00000X and Every Subspecialty

The short answer

The NUCC taxonomy code for Obstetrics & Gynecology is 207V00000X. It's the code most general OB/GYN physicians list as their primary taxonomy on their National Provider Identifier (NPI) record. If you subspecialize, a more specific code may describe your practice better — the full list is below.

Taxonomy codes come from the Health Care Provider Taxonomy code set maintained by the National Uniform Claim Committee (NUCC). The set is updated twice a year, so it's worth checking the NUCC website for the latest version before an enrollment.

OB/GYN physician taxonomy codes

All OB/GYN physician taxonomy codes start with 207V. The four characters after it identify the specialization; 00000X means the general classification with no subspecialty.

Taxonomy codes for other women's health providers

OB/GYN practices often include providers who aren't physicians. Each has its own taxonomy:

For groups, the organizational (Type 2) NPI usually carries a group taxonomy — for example 193400000X for a single-specialty group or 193200000X for a multi-specialty group — though some payers prefer the group to list the specialty taxonomy of its providers. Check each payer's enrollment instructions.

How to choose the right taxonomy code

Pick the code that best describes the services you actually provide:

• General OB/GYN practice — delivering babies and providing gynecologic care — use 207V00000X.
• Gynecology only (no obstetrics) — 207VG0400X may be more accurate, and some payers use it to route claims and directory listings.
• Board-certified subspecialists — maternal-fetal medicine, reproductive endocrinology and infertility, gynecologic oncology, urogynecology — generally list the subspecialty code, and often 207V00000X as an additional code if they also provide general OB/GYN care.
• Physicians who provide primarily obstetric care may use 207VX0000X.

The taxonomy you choose should be consistent across your NPPES record, your Medicare and Medicaid enrollment, your CAQH profile and your commercial payer contracts.

Why taxonomy codes matter for billing

Taxonomy isn't just a box on the NPI application. It affects:

• Claim processing. Many Medicaid programs and some commercial payers require the taxonomy on claims and use it to match the claim to the right enrollment record. A taxonomy that doesn't match the enrollment can cause rejections.
• Fee schedules. Some payers load different fee schedules or allowed services by specialty, which they identify through taxonomy.
• Provider directories. Patients searching for a maternal-fetal medicine specialist or a urogynecologist find providers by their listed specialty.
• Data and quality reporting. Specialty designation affects how your performance is benchmarked in some programs.

Where taxonomy goes on a claim

On the 837P electronic claim, taxonomy is reported in the PRV segment:

• Loop 2000A — billing provider specialty information
• Loop 2310B — rendering provider specialty information, when the rendering provider differs from the billing provider

On the CMS-1500 paper claim, taxonomy is reported with the ZZ qualifier in the shaded area of item 24J (rendering) and item 33b (billing), when a payer requires it.

Your practice management system populates these fields from the provider setup, so the most important step is making sure each provider's taxonomy is configured correctly in the system.

How to look up or update a taxonomy code

1. Look up a provider's current taxonomy on the NPPES NPI Registry by searching the NPI or provider name. The record lists all taxonomy codes and which one is primary.
2. Update your taxonomy by logging into NPPES and editing the NPI record. You can add multiple taxonomies but must select one primary.
3. Update your payer enrollments. Medicare enrollment is updated through PECOS; Medicaid and commercial plans each have their own process. Changing NPPES alone doesn't change what payers have on file.
4. Update your PM system so claims carry the new taxonomy.
5. Update CAQH so commercial plans see consistent information.

Common taxonomy mistakes

• Mismatch between NPPES and payer enrollment. The most frequent cause of taxonomy-related rejections, especially with Medicaid.
• Subspecialists listed only as general OB/GYN, which can hide them from patients searching directories for their subspecialty.
• Midwives or NPs billed with a physician taxonomy — or billed under a physician's NPI when the payer requires their own.
• Group taxonomy used for an individual or vice versa.
• Outdated codes after NUCC updates or after a provider completes subspecialty training.

Quick reference: which code should I choose?

How we help

Taxonomy is part of our credentialing and enrollment service and our new practice setup process. We check that every provider's taxonomy is correct and consistent across NPPES, Medicare, Medicaid, CAQH and commercial payers — and that your billing system reports it the way each payer requires. Taxonomy problems often show up as unexplained rejections; our denial management team traces them back to the source.

Have a taxonomy or enrollment question? Send us a WhatsApp message — we're happy to help, free of charge.