Neal Birnbaum, M.D.
Rheumatology Physician · San Rafael, CA
Neal Birnbaum, M.D. is a rheumatology physician with a practice address in San Rafael, California, and NPI 1437142882, issued on Aug 31, 2005. Check the license (California C36561, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Neal Birnbaum
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- C36561 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4000 Civic Center Dr Ste 200A, San Rafael, CA 94903
- Phone
- (415) 464-9604
- Enumerated
- Aug 31, 2005
- Entity
- Type 1 · individual
Also registered at 4000 Civic Center Dr Ste 200A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Izza Bazigh, M.DRheumatology Physician1679196836
- Tarik DabitOptometrist1447825021
- Christine Yim, O.D.Optometrist1003265588
Verify Neal Birnbaum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C36561Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
27% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,502 Medicare Part D claims for 242 beneficiaries, against an average of 2,058 among the 4,833 providers of this specialty who prescribed in Part D. 48 claims were for opioids.
Most prescribed
- Prednisone300 claims
- Hydroxychloroquine Sulfate208 claims
- Methotrexate138 claims
- Allopurinol90 claims
- Humira(Cf) Pen87 claims
- Enbrel74 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.
No measured Medicare quality score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $23,460.01
141 payments, mostly food and beverage; the largest payer was Abbvie Inc.. The 3,502 providers of this specialty with any payment received $8,487.29 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.
One hospital or facility affiliation
- Regents Univ OF California UcsfSan Francisco, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Rheumatology Physician providers in California
There are 719 rheumatology physician records in California.
Other rheumatology physician records in California
- Thomas Abel, MDMonte Sereno, CA1871679399
- Thomas Adamson, M.D.San Diego, CA1639187057
- Sana Afroz, MDMoreno Valley, CA1356724074
- Atul Agrawal, MDAntioch, CA1528146016
- Bikramjit Ahluwalia, MDApple Valley, CA1669402467
- Shirin Ahmad, MDFolsom, CA1932182318
- Basma Al Nahlawi, M.D.San Marcos, CA1144455262
- Phillip Aleksiejuk, MDWoodland Hills, CA1063844579
- Stanley Alexander, MDArcadia, CA1497814685
- Edward Amento, M.D.Sunnyvale, CA1457896961
Common questions
What is Neal Birnbaum, M.D.'s NPI number?
Neal Birnbaum, M.D.'s National Provider Identifier (NPI) is 1437142882, issued on Aug 31, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Neal Birnbaum, M.D. located?
The NPPES record lists a practice address at 4000 Civic Center Dr Ste 200A, San Rafael, CA, 94903. Phone: (415) 464-9604. Providers update this record themselves, so call before visiting.
How can I verify Neal Birnbaum, M.D.'s license?
NPPES lists California license number C36561, 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 Neal Birnbaum, M.D. prescribe under Medicare Part D?
In 2024, Neal Birnbaum, M.D. had 1,502 Medicare Part D claims for 242 beneficiaries; the average among rheumatology physician prescribers was 2,058. Part D covers Medicare prescriptions only.
What is Neal Birnbaum, M.D.'s Medicare quality score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.