Bobby Tay, MD
Orthopaedic Surgery Physician · San Francisco, CA
Bobby Tay, MD is an orthopaedic surgery physician with a practice address in San Francisco, California, and NPI 1124065164, issued on May 31, 2006. Check the license (California G80047, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Bobby Tay
- Credential
- MD
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- G80047 CA
Self-reported in NPPES; status is on the state search - Practice location
- 400 Parnassus Ave, San Francisco, CA 94143
- Phone
- (414) 353-2739
- Enumerated
- May 31, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (415) 353-2248
- Medicaid ID
- 00G800470 CA
- Medicare enrollment
- Enrolled (PECOS I20080212000684); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 2,276 in California → Look up another NPI →
Also registered at 400 Parnassus Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Weiyun Ai, MDMedical Oncology Physician1649346842
Verify Bobby Tay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G80047Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
34 Medicare Part D claims for 18 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Oxycodone-Acetaminophen11 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.
Industry payments in 2024: $2,034.19
28 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 15,003 providers of this specialty with any payment received $23,022.89 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
- Ucsf Medical Group Business ServicesSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Bobby Tay among 2,276 orthopaedic surgery physician records in California
Bobby Tay, MD is one of 2,276 orthopaedic surgery physician records with a practice address in California. 74% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 46% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1993 · median 2003 among the 1,347 with a school on file
- Record last updated2026 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in California
There are 2,276 orthopaedic surgery physician records in California.
All 2,276 in California → Every provider in San Francisco → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Sigurd Berven, MDSan Francisco, CA 941431336193812
- David Bradford, MDSan Francisco, CA 941431003853193
- Alexis Dang, MDSan Francisco, CA 941431720119852
- Eliana Delgado, MDSan Francisco, CA 941431801963020
- Sibel Deviren, MDSan Francisco, CA 941431760435655
- Vedat Deviren, MDSan Francisco, CA 941431730230459
- Mohammad Diab, MDSan Francisco, CA 941431841243755
- Glenn Diekmann, M.D.San Francisco, CA 941431467584326
Common questions
What is Bobby Tay, MD's NPI number?
Bobby Tay, MD's National Provider Identifier (NPI) is 1124065164, issued on May 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Bobby Tay, MD located?
The NPPES record lists a practice address at 400 Parnassus Ave, San Francisco, CA, 94143. Phone: (414) 353-2739. Providers update this record themselves, so call before visiting.
How can I verify Bobby Tay, MD's license?
NPPES lists California license number G80047, 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 Bobby Tay, MD prescribe under Medicare Part D?
In 2024, Bobby Tay, MD had 34 Medicare Part D claims for 18 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. 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.