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Obstetrics & Gynecology Specialists in Fullerton, CA

Browse 17 Obstetrics & Gynecology providers listed in NPPES with a practice address in Fullerton, California.

17 Healthcare Providers

How Fullerton compares with the U.S.

Fullerton has 12 clinicians in Obstetrics & Gynecology per 100,000 residents, 12% lower than the U.S. rate of 14.

That is 17 active clinicians in Obstetrics & Gynecology with a practice address in Fullerton, for a population of 140,968.

That is close to the California rate of 13.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places.

100% of clinicians in Obstetrics & Gynecology in Fullerton listed in the CMS Medicare file (14 of 14) accept Medicare assignment. That is higher than the California share of 92%.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

7% of clinicians in Obstetrics & Gynecology in Fullerton listed in the CMS Medicare file (1 of 14) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower than the California share of 21%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@t-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of November 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Obstetrics & Gynecology Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Obstetrics & Gynecology practitioners in Fullerton, CA

Source: CMS PECOS
PECOS Enrolled Specialists 14 In Fullerton, CA
Part B Lab & Imaging Eligible 15 Diagnostic Referrals
DME Ordering Eligible 16 Durable Medical Equipment
Home Health Agency Referrals 15 HHA Ordering Eligible
Showing 1โ€“17 of 17 providers
With recent CMS data first, then Aโ€“Z

Christina Buchanan

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment
101 Laguna Rd Ste 100, Fullerton, CA 928353601
Phone: 7149925350
NPI Identifier 1750818357
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Dr. Dennis J Buchanan , MD

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment
101 Laguna Rd Ste 100, Fullerton, CA 928353601
Phone: 7149925350
NPI Identifier 1003864737
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Dr. Mirna Demirdjian , MD

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment
2501 E Chapman Ave Ste 107, Fullerton, CA 928313135
Phone: 7144096881
NPI Identifier 1407085665
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Dr. Theresa M Franks , MD

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment
1950 Sunny Cret Drive, Suite 2800, Medical Center For Women, Fullerton, CA 928353618
Phone: 7149925350
NPI Identifier 1396700704
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Dr. Brian C Gray , MD

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment
101 Laguna Rd Ste 100, Fullerton, CA 928353601
Phone: 7149925350
NPI Identifier 1457316705
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Dr. Donald W Henderson , MD

Obstetrics & Gynecology

Active NPI Status
1950 Sunnycrest Dr, Suite 2800, Fullerton, CA 928353638
Phone: 7149925350
NPI Identifier 1447217898
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Dr. Jennifer Jane Roelands , MD

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
301 W Bastanchury Rd Ste 140, Fullerton, CA 928353427
Phone: 7142723477
NPI Identifier 1164695409
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Dr. Riana Kaur Sandhar , MD

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment
101 Laguna Rd Ste 100, Fullerton, CA 928353601
Phone: 7149925350
NPI Identifier 1851955207
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Dr. Johanna Su , MD

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment
101 Laguna Rd Ste 100, Fullerton, CA 928353601
Phone: 7149925350
NPI Identifier 1255547725
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Dr. Jerald John Thanos , MD

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment
2262 N State College Blvd, Fullerton, CA 928311361
Phone: 7149902900
NPI Identifier 1013947738
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Dr. Nicholas John Thanos , MD

Obstetrics & Gynecology

Active NPI Status
2262 N State College Blvd, Fullerton, CA 928311361
Phone: 7149902900
NPI Identifier 1427088194
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Dr. Robyn D Vieth , MD

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment
101 Laguna Rd Ste 100, Fullerton, CA 928353601
Phone: 7149925350
NPI Identifier 1407806961
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Dr. Christina M Borsari , MD

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment
1950 Sunny Crest Dr, Suite 2800 Medical Center For Women, Fullerton, CA 928353618
Phone: 7149925350
NPI Identifier 1356308704
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Dr. Minette Francess Finney , MD

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment
100 E Valencia Mesa Dr Ste 311, Fullerton, CA 928353800
Phone: 7149923969
NPI Identifier 1750960571
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Dr. Earl S. Fuller , MD

Obstetrics & Gynecology

Active NPI Status
508 Elinor Dr., Fullerton, CA 92835
Phone: 7148797526
NPI Identifier 1053684951
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Dr. Pouran Malekzadeh , MD

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment
100 E Valencia Mesa Dr Ste 311, Fullerton, CA 928353800
Phone: 7149925350
NPI Identifier 1033643424
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Dr. Vasiliki Tatsis , MD

Obstetrics & Gynecology

Active NPI Status Accepts Medicare Assignment
2262 N State College Blvd, Fullerton, CA 928311361
Phone: 7149902900
NPI Identifier 1013114719
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Frequently Asked Questions about Obstetrics & Gynecology in Fullerton

How do I check a Obstetrics & Gynecology practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the California licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.