John Walter Nimtz, MD
Anesthesiology Physician · Santa Rosa, CA
John Walter Nimtz, MD is an anesthesiology physician with a practice address in Santa Rosa, California, and NPI 1851341804, issued on May 11, 2006. Check the license (California G44002, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Walter Nimtz
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- G44002 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1165 Montgomery Dr, Santa Rosa, CA 95405
- Phone
- (707) 546-3210
- Enumerated
- May 11, 2006
- Record last updated
- Nov 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00G440020 CA
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 7,571 in California → Look up another NPI →
Also registered at 1165 Montgomery Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Walter Nimtz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G44002Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% more Medicare Part D claims than the average anesthesiology physician in 2024
542 Medicare Part D claims for 137 beneficiaries, against an average of 402 among the 4,319 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium49 claims
- Amlodipine Besylate30 claims
- Tamsulosin Hcl23 claims
- Levothyroxine Sodium20 claims
- Pantoprazole Sodium19 claims
- Sertraline Hcl19 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.
John Walter Nimtz among 7,571 anesthesiology physician records in California
John Walter Nimtz, MD is one of 7,571 anesthesiology physician records with a practice address in California. 71% 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, 53% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2021 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anesthesiology Physician providers in California
There are 7,571 anesthesiology physician records in California.
All 7,571 in California → Every provider in Santa Rosa → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Darin Brunson, MDSanta Rosa, CA 954051063462893
- Charles Demitz, MDSanta Rosa, CA 954051477502904
- Margaret Fanucchi, MDSanta Rosa, CA 954051093764532
- Dyke Finley, MDSanta Rosa, CA 954051861441305
- Blair Halliday, MDSanta Rosa, CA 954051154370690
- Brian Marsh, MDSanta Rosa, CA 954051588614598
- Margaret McEvoy, MDSanta Rosa, CA 954051255380978
- David Robertson, DOSanta Rosa, CA 954051396795340
Common questions
What is John Walter Nimtz, MD's NPI number?
John Walter Nimtz, MD's National Provider Identifier (NPI) is 1851341804, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Walter Nimtz, MD located?
The NPPES record lists a practice address at 1165 Montgomery Dr, Santa Rosa, CA, 95405. Phone: (707) 546-3210. Providers update this record themselves, so call before visiting.
How can I verify John Walter Nimtz, MD's license?
NPPES lists California license number G44002, 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 John Walter Nimtz, MD prescribe under Medicare Part D?
In 2024, John Walter Nimtz, MD had 542 Medicare Part D claims for 137 beneficiaries; the average among anesthesiology physician prescribers was 402. 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.