Barbara Callahan, M.D.
Internal Medicine Physician · West Hills, CA
Barbara Callahan, M.D. is an internal medicine physician with a practice address in West Hills, California, and NPI 1124111653, issued on Oct 2, 2006. Check the license (California C41130, 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 Callahan
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C41130 CA
Self-reported in NPPES; status is on the state search - Practice location
- 7301 Medical Center Dr #402, West Hills, CA 91307
- Phone
- (818) 227-0070
- Enumerated
- Oct 2, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Barbara Callahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C41130Check 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 Callahan among 17,696 internal medicine physician records in California
Barbara Callahan, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 internal medicine physician records list a practice address in West Hills
They are 22 of the 708 NPPES records with a practice address in West Hills, and 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,696 in California → Every provider in West Hills → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Shahab Attarchi, MDWest Hills, CA 913071902982408
- Warren Churg, M.D.West Hills, CA 913071629020490
- Christopher Hage, M.D.West Hills, CA 913071043397482
- Robert Hanson, M.D.West Hills, CA 913071447213616
- Caleb Hirsch, MDWest Hills, CA 913071619976800
- Mohammed Iqbal, MDWest Hills, CA 913071578574596
- Bruce Jacobson, M.D.West Hills, CA 913071558314971
- Marc Lavin, M.D.West Hills, CA 913071326048638
Common questions
What is Barbara Callahan, M.D.'s NPI number?
Barbara Callahan, M.D.'s National Provider Identifier (NPI) is 1124111653, issued on Oct 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Barbara Callahan, M.D. located?
The NPPES record lists a practice address at 7301 Medical Center Dr #402, West Hills, CA, 91307. Phone: (818) 227-0070. Providers update this record themselves, so call before visiting.
How can I verify Barbara Callahan, M.D.'s license?
NPPES lists California license number C41130, 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.