Richard T. Zweig, MD
Rheumatology Physician · Santa Rosa, CA
Richard T. Zweig, MD is a rheumatology physician with a practice address in Santa Rosa, California, and NPI 1124102298, issued on Oct 25, 2006. Check the license (California G36363, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Richard T. Zweig
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- G36363 CA
Self-reported in NPPES; status is on the state search - Practice location
- 401 Bicentennial Way, Santa Rosa, CA 95403
- Phone
- (707) 571-4000
- Enumerated
- Oct 25, 2006
- Record last updated
- Nov 23, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicaid ID
- 00G363630 CA
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 401 Bicentennial Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Anna Ackerman, RNRegistered Nurse1376409409
- Patricia AdamsPhysical Therapist1124971825
- Hugo Aguilar, PHARMDPharmacist1992389134
- Heather Aiello, OTR/LOccupational Therapist1851155022
- Sandra Akrawi, REGISTERED DIETITIANRegistered Dietitian1790821031
- Miguel Alcala, LCSWClinical Social Worker1629857891
Verify Richard T. Zweig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G36363Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average rheumatology physician in 2024
22 Medicare Part D claims, against an average of 1,978 among the 6,301 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: $25.62
1 payment: food and beverage; the largest payer was ViiV Healthcare Company. 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.
Richard T. Zweig among 926 rheumatology physician records in California
Richard T. Zweig, 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 updated2015 · 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).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Santa Rosa → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Todd Hofeling, M.D.Santa Rosa, CA 954031447451935
- Khashayar Khosraviani, MDSanta Rosa, CA 954031144592205
- David Maniscalco, M.D.Santa Rosa, CA 954031386031268
- Lisa Kremer, M.D.Santa Rosa, CA 954051144262213
- Jack Waxman, M.D.Santa Rosa, CA 954051104824994
- Donald Whisler, M.D.Santa Rosa, CA 954051639516149
- Iraj Sabahi, M.D.Turlock, CA 953821881886042
- Sahdev Saharan, M.D.Tracy, CA 953761588875512
Common questions
What is Richard T. Zweig, MD's NPI number?
Richard T. Zweig, MD's National Provider Identifier (NPI) is 1124102298, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Richard T. Zweig, MD located?
The NPPES record lists a practice address at 401 Bicentennial Way, Santa Rosa, CA, 95403. Phone: (707) 571-4000. Providers update this record themselves, so call before visiting.
How can I verify Richard T. Zweig, MD's license?
NPPES lists California license number G36363, 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 Richard T. Zweig, MD prescribe under Medicare Part D?
In 2024, Richard T. Zweig, MD had 22 Medicare Part D claims; the average among rheumatology physician prescribers was 1,978. 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.