Bryan D. Gescuk, M.D.
Rheumatology Physician · San Mateo, CA
Bryan D. Gescuk, M.D. is a rheumatology physician with a practice address in San Mateo, California, and NPI 1295815579, issued on Oct 17, 2006. Check the license (California A65762, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Bryan D. Gescuk
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- A65762 CA
Self-reported in NPPES; status is on the state search - Practice location
- 222 W 39TH Ave, San Mateo, CA 94403
- Phone
- (650) 573-2222
- Enumerated
- Oct 17, 2006
- Record last updated
- Jul 21, 2022
- Medicaid ID
- 00A657620 CA
- Medicare enrollment
- Enrolled (PECOS I20100628000746); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 222 W 39TH Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Stacey Adelson, NPNurse Practitioner1104951797
- Brita Almog, MDPediatrics Physician1033402847
- John Anderson, MDObstetrics & Gynecology Physician1013082429
- Shea AndersonClinical Social Worker1689964991
- Zohra Ansari, MSWClinical Social Worker1326462904
Verify Bryan D. Gescuk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A65762Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% more Medicare Part D claims than the average rheumatology physician in 2024
2,550 Medicare Part D claims for 439 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims. 402 claims were for opioids.
Most prescribed
- Prednisone292 claims
- Methotrexate230 claims
- Hydroxychloroquine Sulfate155 claims
- Hydrocodone-Acetaminophen149 claims
- Humira(Cf) Pen132 claims
- Allopurinol129 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 73.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $129,815.10
346 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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.
Bills Medicare through one group practice
- San Mateo Rheumatology IncSan Mateo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Bryan D. Gescuk among 926 rheumatology physician records in California
Bryan D. Gescuk, M.D. 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 fileYes · 69% of these records are
- Record last updated2022 · 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 San Mateo → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- David Yocum, M.D.San Mateo, CA 944041477766772
- Rhonda Lambert, MDSan Mateo, CA 944011942230230
- Paul ShiuSan Mateo, CA 944011508495433
- Michael Stevens, M.D.San Mateo, CA 944011932198793
- Siba Raychaudhuri, M.D.Palo Alto, CA 943061821033275
- Brian Abe, MD, PHDStanford, CA 943051104262708
- Christine Anastasiou Perlegos, MDStanford, CA 943051881038818
- Audra Horomanski, MDStanford, CA 943051003202714
Common questions
What is Bryan D. Gescuk, M.D.'s NPI number?
Bryan D. Gescuk, M.D.'s National Provider Identifier (NPI) is 1295815579, issued on Oct 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Bryan D. Gescuk, M.D. located?
The NPPES record lists a practice address at 222 W 39TH Ave, San Mateo, CA, 94403. Phone: (650) 573-2222. Providers update this record themselves, so call before visiting.
How can I verify Bryan D. Gescuk, M.D.'s license?
NPPES lists California license number A65762, 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 Bryan D. Gescuk, M.D. prescribe under Medicare Part D?
In 2024, Bryan D. Gescuk, M.D. had 2,550 Medicare Part D claims for 439 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Bryan D. Gescuk, M.D.'s MIPS final score?
The 2023 MIPS final score is 73.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.