Gary Allen Herfindahl, M.D.
Critical Care Medicine (Internal Medicine) Physician · Mount Shasta, CA
Gary Allen Herfindahl, M.D. is a critical care medicine (internal medicine) physician with a practice address in Mount Shasta, California, and NPI 1336164771, issued on Jul 13, 2006. Check the license (California G51667, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gary Allen Herfindahl
- Credential
- M.D.
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- G51667 CA
Self-reported in NPPES; status is on the state search - Practice location
- 908 Pine St, Mount Shasta, CA 96067
- Phone
- (530) 926-3161
- Enumerated
- Jul 13, 2006
- Record last updated
- Sep 11, 2025
- Fax
- (530) 926-0406
- Medicaid IDs
- 172614 OR
00G516670 CA - Entity
- Type 1 · individual
Verify Gary Allen Herfindahl in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G51667Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
24 Medicare Part D claims, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D. Brand-name drugs were 46% of claims.
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.
Critical Care Medicine (Internal Medicine) Physician providers in California
There are 723 critical care medicine (internal medicine) physician records in California.
Other critical care medicine (internal medicine) physician records in California
- Mariam Abdelkader, MDFresno, CA1689022824
- Hazem Abdelsalam, M.D.Torrance, CA1346793312
- Unknown Abdul Hameed Zaid, M.B,B.SLoma Linda, CA1679908800
- Glen Abergel, M.D.Oxnard, CA1093743924
- Ayham Aboeed, M.D.Bakersfield, CA1093969750
- Henry Abrons, M.D.Berkeley, CA1821001470
- Noman Absar, MDVallejo, CA1205908951
- Natalie Achamallah, M.D.West Hollywood, CA1255881546
- Cresencio AdamePalo Alto, CA1750021564
- Allen Adams, M.D.Los Angeles, CA1700862794
Common questions
What is Gary Allen Herfindahl, M.D.'s NPI number?
Gary Allen Herfindahl, M.D.'s National Provider Identifier (NPI) is 1336164771, issued on Jul 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gary Allen Herfindahl, M.D. located?
The NPPES record lists a practice address at 908 Pine St, Mount Shasta, CA, 96067. Phone: (530) 926-3161. Providers update this record themselves, so call before visiting.
How can I verify Gary Allen Herfindahl, M.D.'s license?
NPPES lists California license number G51667, 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 Gary Allen Herfindahl, M.D. prescribe under Medicare Part D?
In 2024, Gary Allen Herfindahl, M.D. had 24 Medicare Part D claims; the average among critical care medicine (internal medicine) physician prescribers was 696. 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.