Gary Nichols, M.D.
Internal Medicine Physician · Santa Rosa, CA
Gary Nichols, M.D. is an internal medicine physician with a practice address in Santa Rosa, California, and NPI 1033201587, issued on Sep 29, 2006. Check the license (California G73872, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gary Nichols
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- G73872 CA
181851 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2455 Summerfield RD, Santa Rosa, CA 95405
- Phone
- (707) 308-2815
- Enumerated
- Sep 29, 2006
- Record last updated
- Jul 10, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (707) 573-5439
- Medicare enrollment
- Enrolled (PECOS I20050525001260); accepts Medicare assignment
- Medical or professional school
- University Of Kansas School Of Med (Kc/Wich/Sal), 1981
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2455 Summerfield RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Charlotte Carlson, M.D.Geriatric Medicine (Internal Medicine) Physician1134446875
- Tabitha DeeringSocial Worker1467299503
- Gary Furness, MDFamily Medicine Physician1144281635
- Jessica GalindoClinical Social Worker1578812426
- Steven Mitnick, MDAnatomic Pathology & Clinical Pathology Physician1548285950
- Christine Silano, AGNP-BCNurse Practitioner1538688858
Verify Gary Nichols in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G73872Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
137 Medicare Part D claims for 69 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
Industry payments in 2024: $15.23
1 payment: food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Sutter Bay Medical FoundationSanta Rosa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gary Nichols among 17,696 internal medicine physician records in California
Gary Nichols, M.D. 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 fileYes · 63% of these records are
- Graduated1981 · median 2004 among the 11,065 with a school on file
- Record last updated2019 · 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).
98 internal medicine physician records list a practice address in Santa Rosa
They are 98 of the 6,884 NPPES records with a practice address in Santa Rosa, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Santa Rosa → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nicholas Anton, MDSanta Rosa, CA 954051659364933
- George Bisbee, MDSanta Rosa, CA 954051235122516
- David Capaccio, DOSanta Rosa, CA 954051457355364
- David Charp, M.D.Santa Rosa, CA 954051053335208
- Catherine Davis, MDSanta Rosa, CA 954051497748776
- Marlon Decastro, M.D.Santa Rosa, CA 954051780643270
- John Hurwitz, DOSanta Rosa, CA 954051124018262
- Adina Logan, M.D.Santa Rosa, CA 954051881667178
Common questions
What is Gary Nichols, M.D.'s NPI number?
Gary Nichols, M.D.'s National Provider Identifier (NPI) is 1033201587, issued on Sep 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gary Nichols, M.D. located?
The NPPES record lists a practice address at 2455 Summerfield RD, Santa Rosa, CA, 95405. Phone: (707) 308-2815. Providers update this record themselves, so call before visiting.
How can I verify Gary Nichols, M.D.'s license?
NPPES lists California license number G73872, 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 Nichols, M.D. prescribe under Medicare Part D?
In 2024, Gary Nichols, M.D. had 137 Medicare Part D claims for 69 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.