Tracy A. Newkirk, M.D.
Neurology Physician · Greenbrae, CA
Tracy A. Newkirk, M.D. is a neurology physician with a practice address in Greenbrae, California, and NPI 1477630259, issued on Nov 1, 2006. Check the license (California 0C33431, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tracy A. Newkirk
- Credential
- M.D.
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- 0C33431 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 SO. Eliseo, Ste. 204, Greenbrae, CA 94904
- Phone
- (415) 461-2262
- Enumerated
- Nov 1, 2006
- Record last updated
- Aug 3, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (415) 461-2262
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Verify Tracy A. Newkirk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 0C33431Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average neurology physician in 2024
139 Medicare Part D claims, against an average of 1,370 among the 15,005 providers of this specialty who prescribed in Part D. Brand-name drugs were 39% of claims.
Most prescribed
- Myrbetriq12 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.
Tracy A. Newkirk among 2,339 neurology physician records in California
Tracy A. Newkirk, M.D. is one of 2,339 neurology physician records with a practice address in California. 81% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2015 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in California
There are 2,339 neurology physician records in California.
All 2,339 in California → Every provider in Greenbrae → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Ilkcan Cokgor, M.D.Greenbrae, CA 949041235100603
- John Panagotacos, M.D.Kentfield, CA 949041982895108
- Evan Luxenberg, MDSan Rafael, CA 949031457857609
- Jerry Schlegel, MDSan Rafael, CA 949031124102199
- Susan Goldwasser, M.D.Tiburon, CA 949201013091388
- Julie Griffith, MD MS, CMT, BCIPLagunitas, CA 949381083780621
- Jonathan Rutchik, M.D.Mill Valley, CA 949411972559672
- Sandra Shefrin, M.D.Mill Valley, CA 949411083665335
Common questions
What is Tracy A. Newkirk, M.D.'s NPI number?
Tracy A. Newkirk, M.D.'s National Provider Identifier (NPI) is 1477630259, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Tracy A. Newkirk, M.D. located?
The NPPES record lists a practice address at 1000 SO. Eliseo, Ste. 204, Greenbrae, CA, 94904. Phone: (415) 461-2262. Providers update this record themselves, so call before visiting.
How can I verify Tracy A. Newkirk, M.D.'s license?
NPPES lists California license number 0C33431, 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 Tracy A. Newkirk, M.D. prescribe under Medicare Part D?
In 2024, Tracy A. Newkirk, M.D. had 139 Medicare Part D claims; the average among neurology physician prescribers was 1,370. 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.