Gregory Michael Bell, MD
Rheumatology Physician · Tiburon, CA
Gregory Michael Bell, MD is a rheumatology physician with a practice address in Tiburon, California, and NPI 1053425116, issued on Aug 18, 2006. Check the license (California G63151, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Michael Bell
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- G63151 CA
Self-reported in NPPES; status is on the state search - Practice location
- 157 Trinidad Dr, Tiburon, CA 94920
- Phone
- (415) 435-6210
- Enumerated
- Aug 18, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Verify Gregory Michael Bell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G63151Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $149.96
1 payment: food and beverage; the largest payer was Amgen Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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.
Gregory Michael Bell among 926 rheumatology physician records in California
Gregory Michael Bell, MD is one of 926 rheumatology 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 69% of these records are
- Record last updated2007 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 rheumatology physician record lists a practice address in Tiburon
They are 1 of the 69 NPPES records with a practice address in Tiburon, and 926 rheumatology physician records in California.
All 926 in California → Every provider in Tiburon → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Elizabeth Smith, MDGreenbrae, CA 949041235230525
- Peter Stein, M.D.Greenbrae, CA 949041730295643
- Izza Bazigh, M.DSan Rafael, CA 949031679196836
- Neal Birnbaum, M.D.San Rafael, CA 949031437142882
- Maurice Kinsolving, MDSan Rafael, CA 949031033293006
- David Chernoff, MDSan Rafael, CA 949011164759312
- Arundathi Malladi, M.D.Larkspur, CA 949391073709416
- Jerry Rosenbaum, M.DSan Rafael, CA 949011700907896
Common questions
What is Gregory Michael Bell, MD's NPI number?
Gregory Michael Bell, MD's National Provider Identifier (NPI) is 1053425116, issued on Aug 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Michael Bell, MD located?
The NPPES record lists a practice address at 157 Trinidad Dr, Tiburon, CA, 94920. Phone: (415) 435-6210. Providers update this record themselves, so call before visiting.
How can I verify Gregory Michael Bell, MD's license?
NPPES lists California license number G63151, 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. 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.