Barbara Hughes Kostick, M.D.
Family Medicine Physician · Fremont, CA
Barbara Hughes Kostick, M.D. is a family medicine physician with a practice address in Fremont, California, and NPI 1104840586, issued on Jul 27, 2006. Check the license (California G24535, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Barbara Hughes Kostick
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G24535 CA
Self-reported in NPPES; status is on the state search - Practice location
- 38069 Martha Ave, Fremont, CA 94536
- Phone
- (510) 608-4800
- Enumerated
- Jul 27, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- ZZZ21188Z CA
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
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Verify Barbara Hughes Kostick in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G24535Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Barbara Hughes Kostick among 17,133 family medicine physician records in California
Barbara Hughes Kostick, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileNo · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2007 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
90 family medicine physician records list a practice address in Fremont
They are 90 of the 4,749 NPPES records with a practice address in Fremont, and 17,133 family medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,133 in California → Every provider in Fremont → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Ebrahim Ahmadi, MDFremont, CA 945361417008426
- Khalid Baig, M.D.Fremont, CA 945361720199342
- Harleen Dyal, M.D.Fremont, CA 945361225424237
- Shankar Ghimire, M.D.Fremont, CA 945361851693378
- Edmundo Ruiz Davila, M.D.Fremont, CA 945361699726976
- Ana Francesca Capati, MDFairfield, CA 945351265133458
- Kara Cassady, MDTravis Afb, CA 945351962063297
- Jake Herber, DOTravis Afb, CA 945351285327882
Common questions
What is Barbara Hughes Kostick, M.D.'s NPI number?
Barbara Hughes Kostick, M.D.'s National Provider Identifier (NPI) is 1104840586, issued on Jul 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Barbara Hughes Kostick, M.D. located?
The NPPES record lists a practice address at 38069 Martha Ave, Fremont, CA, 94536. Phone: (510) 608-4800. Providers update this record themselves, so call before visiting.
How can I verify Barbara Hughes Kostick, M.D.'s license?
NPPES lists California license number G24535, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.