Maternal & Fetal Medicine Physician: how many are there, and how many are in private practice?

National totals

What this specialty covers

An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.

Reading the sole-proprietor share

For this specialty, 293 of 2,896 records, or 10.1%, are flagged as sole proprietors in NPPES. This field is self-reported and describes the NPI record's classification, not necessarily whether a physician works in an independent or private practice. It is therefore an imperfect proxy for private practice because ownership, employment, group structure, and billing arrangements may not be captured by the flag.

By state

New NPI registrations by year

Counts reflect the year each NPI was first issued, among records still active today. The final year is partial: this data covers through 2026-01-11.

Data notes

• The sole-proprietor field is self-reported by the provider in NPPES and is an imperfect proxy for private practice.
• A sole-proprietor count shown as <11 is suppressed: the true value is below 11, which could include zero.
• The count includes active NPI records with this taxonomy as the primary classification, not records where it appears only as a secondary taxonomy.
• NPI records can represent providers or organizations and may not correspond one-to-one with unique physicians, practices, or clinical sites.
• Providers are counted once, by their primary taxonomy code only.

Source: CMS National Plan and Provider Enumeration System (NPPES) Data Dissemination file, FOIA-disclosable public data under CMS-6060-N. Aggregated by Hero EMR on 2026-08-03; deactivated NPIs excluded; specialty assigned from the primary taxonomy code (NUCC 25.1). Counts below 11 are suppressed. Individual providers are never published. All provider data pages.

Common questions