David Hagen Kirn, MD
Internal Medicine Physician · Mill Valley, CA
David Hagen Kirn, MD is an internal medicine physician with a practice address in Mill Valley, California, and NPI 1821629296, issued on Feb 4, 2020. Check the license (California G75483, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- David Hagen Kirn
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G75483 CA
Self-reported in NPPES; status is on the state search - Practice location
- 444 Laverne Ave, Mill Valley, CA 94941
- Phone
- (415) 847-7326
- Enumerated
- Feb 4, 2020
- Record last updated
- Feb 4, 2020 (not updated in 6 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 David Hagen Kirn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G75483Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
David Hagen Kirn among 17,696 internal medicine physician records in California
David Hagen Kirn, MD 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 2020, is newer than 89% of them.
- NPI issued2020 · 89% of these records are older, 8% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2020 · 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).
14 internal medicine physician records list a practice address in Mill Valley
They are 14 of the 653 NPPES records with a practice address in Mill Valley, 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 Mill Valley → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Holly Batterman, M.D.Mill Valley, CA 949411124138276
- Kathy Chang-Lipsenthal, MDMill Valley, CA 949411356340079
- Douglas Cohen, M.D.Mill Valley, CA 949411932127248
- Laura Collins, MDMill Valley, CA 949411619976339
- Grace Dammann, M.D.Mill Valley, CA 949411558406736
- Cynthia Fenton, M.D.Mill Valley, CA 949411063720431
- Deanna GreenMill Valley, CA 949411285095182
- Alison Lavoy, M.D.Mill Valley, CA 949411407871197
Common questions
What is David Hagen Kirn, MD's NPI number?
David Hagen Kirn, MD's National Provider Identifier (NPI) is 1821629296, issued on Feb 4, 2020. An NPI identifies a provider in billing; it is not a license.
Where is David Hagen Kirn, MD located?
The NPPES record lists a practice address at 444 Laverne Ave, Mill Valley, CA, 94941. Phone: (415) 847-7326. Providers update this record themselves, so call before visiting.
How can I verify David Hagen Kirn, MD's license?
NPPES lists California license number G75483, 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.