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OB/GYN in Boulder, CO

The federal NPI Registry lists 10 OB/GYNs with a practice address in Boulder.

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OB/GYNs in Boulder

Alphabetical, from the federal NPI Registry (CMS), fetched 2026-11-05. Not a ranking or an endorsement; nobody pays to appear in this list. Confirm details with each office.

  • Ann Mattson, MD

    Obstetrics & Gynecology, Gynecology

    119 Ucb · 80309

    303-492-2040

  • Catherine Ryan, MD

    Obstetrics & Gynecology, Gynecology

    4745 Arapahoe Ave Ste 110 · 80303

    303-444-5110

  • Cchmd Corp

    Obstetrics & Gynecology, Gynecology · Practice / group

    4745 Arapahoe Ave Ste 110 · 80303

    303-444-5110

  • Christine Hansen, MD

    Obstetrics & Gynecology, Gynecology

    4745 Arapahoe Ave Ste 110 · 80303

    303-444-5110

  • John Imig, MD

    Obstetrics & Gynecology, Gynecology

    4745 Arapahoe Ave Suite 200 · 80303

    303-938-4710

  • Kathleen Callanan

    Nurse Practitioner, Obstetrics & Gynecology

    580 Mohawk Dr · 80303

    303-239-7294

  • Mary Macsalka, MD

    Obstetrics & Gynecology, Gynecology

    4745 Arapahoe Ave Ste 110 · 80303

    303-444-5110

  • Ruth Weinberg, MD

    Obstetrics & Gynecology, Gynecology

    2855 Valmont Rd · 80301

    303-442-5160

Plus 2 more registered in Boulder. Search them all at npiregistry.cms.hhs.gov.

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Questions people ask

How many OB/GYNs practice in Boulder?
The federal NPI Registry lists 10 OB/GYNs with a practice address in Boulder. Source: CMS NPI Registry, practice-location addresses.
Can a practice sponsor the OB/GYN page for Boulder?
Yes. This page has 1 sponsor position, sold for a flat monthly fee and always labeled "Sponsored". Fees never depend on patients, calls or leads.

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