Jonathan David Kaiser, MD
Internal Medicine Physician · Healdsburg, CA
Jonathan David Kaiser, MD is an internal medicine physician with a practice address in Healdsburg, California, and NPI 1467521484, issued on Nov 6, 2006. Check the license (California A42113, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jonathan David Kaiser
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A42113 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1083 Vine Street, Healdsburg, CA 95448
- Phone
- (415) 246-9043
- Enumerated
- Nov 6, 2006
- Record last updated
- Jan 13, 2022
- Fax
- (415) 381-7503
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Jonathan David Kaiser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A42113Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average internal medicine physician in 2024
204 Medicare Part D claims for 16 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims. 14 claims were for opioids.
Most prescribed
- Levothyroxine Sodium22 claims
- Gabapentin16 claims
- Hydrocortisone15 claims
- Hydrocodone-Acetaminophen13 claims
- Ozempic13 claims
- Nexlizet12 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.
Jonathan David Kaiser among 17,696 internal medicine physician records in California
Jonathan David Kaiser, 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. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2022 · 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).
13 internal medicine physician records list a practice address in Healdsburg
They are 13 of the 226 NPPES records with a practice address in Healdsburg, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Healdsburg → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jonathan Albeg, MDHealdsburg, CA 954481770677957
- David Anderson, MDHealdsburg, CA 954481629005483
- Jose Chibras Sainz, MDHealdsburg, CA 954481265622286
- Patricia Dahl, M.D.Healdsburg, CA 954481639242696
- Thea Drayer, MDHealdsburg, CA 954481205906021
- Richard Ganz, M.D.Healdsburg, CA 954481285746040
- Sandra GoveHealdsburg, CA 954481801717699
- Melanie Kates, MDHealdsburg, CA 954481518911965
Common questions
What is Jonathan David Kaiser, MD's NPI number?
Jonathan David Kaiser, MD's National Provider Identifier (NPI) is 1467521484, issued on Nov 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jonathan David Kaiser, MD located?
The NPPES record lists a practice address at 1083 Vine Street, Healdsburg, CA, 95448. Phone: (415) 246-9043. Providers update this record themselves, so call before visiting.
How can I verify Jonathan David Kaiser, MD's license?
NPPES lists California license number A42113, 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 Jonathan David Kaiser, MD prescribe under Medicare Part D?
In 2024, Jonathan David Kaiser, MD had 204 Medicare Part D claims for 16 beneficiaries; 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.