Neil W. Hirschenbein, M.D.,PHD
Internal Medicine Physician · San Diego, CA
Neil W. Hirschenbein, M.D.,PHD is an internal medicine physician with a practice address in San Diego, California, and NPI 1457570889, issued on Apr 24, 2007. Check the license (California G28712, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Neil W. Hirschenbein
- Credential
- M.D.,PHD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G28712 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9339 Genesee Ave, San Diego, CA 92121
- Phone
- (858) 546-8055
- Enumerated
- Apr 24, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (858) 546-8281
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
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Verify Neil W. Hirschenbein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G28712Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
22 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Neil W. Hirschenbein among 17,696 internal medicine physician records in California
Neil W. Hirschenbein, M.D.,PHD 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. Its NPI, issued in 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 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).
961 internal medicine physician records list a practice address in San Diego
They are 961 of the 52,937 NPPES records with a practice address in San Diego, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Diego → Internal Medicine Physician nationwide →
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Common questions
What is Neil W. Hirschenbein, M.D.,PHD's NPI number?
Neil W. Hirschenbein, M.D.,PHD's National Provider Identifier (NPI) is 1457570889, issued on Apr 24, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Neil W. Hirschenbein, M.D.,PHD located?
The NPPES record lists a practice address at 9339 Genesee Ave, San Diego, CA, 92121. Phone: (858) 546-8055. Providers update this record themselves, so call before visiting.
How can I verify Neil W. Hirschenbein, M.D.,PHD's license?
NPPES lists California license number G28712, 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.
How much does Neil W. Hirschenbein, M.D.,PHD prescribe under Medicare Part D?
In 2024, Neil W. Hirschenbein, M.D.,PHD had 22 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.