Gregory Yu Chin, MD
Otolaryngology Physician · Walnut Creek, CA
Gregory Yu Chin, MD is an otolaryngology physician with a practice address in Walnut Creek, California, and NPI 1710056924, issued on Nov 6, 2006. Check the license (California A70131, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Yu Chin
- Credential
- MD
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- A70131 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1425 S Main St, Walnut Creek, CA 94596
- Phone
- (925) 295-4000
- Enumerated
- Nov 6, 2006
- Record last updated
- Dec 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A701310 CA
- Medicare enrollment
- Enrolled (PECOS I20031211001184); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 1998
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 1,212 in California → Look up another NPI →
Also registered at 1425 S Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Eric AaserudeEmergency Medicine Physician1811491194
- Derek Abbassi, MDObstetrics & Gynecology Physician1841364155
- Peter Ackerman, MDEmergency Medicine Physician1427435023
- Aaron Mark Acosta, DOEmergency Medicine Physician1538789987
- Basil Adad, MDOtolaryngology Physician1487732574
- Derek Ailes, M.D.Emergency Medical Services (Emergency Medicine) Physician1992001804
Verify Gregory Yu Chin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A70131Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average otolaryngology physician in 2024
146 Medicare Part D claims for 70 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Fluticasone Propionate28 claims
- Ipratropium Bromide17 claims
- Ofloxacin15 claims
- Azelastine Hcl12 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.
Bills Medicare through one group practice
- Permanente Medical Group IncWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Yu Chin among 1,212 otolaryngology physician records in California
Gregory Yu Chin, MD is one of 1,212 otolaryngology physician records with a practice address in California. 80% 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 7% of them.
- NPI issued2006 · 7% of these records are older, 52% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1998 · median 2004 among the 818 with a school on file
- Record last updated2021 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in California
There are 1,212 otolaryngology physician records in California.
All 1,212 in California → Every provider in Walnut Creek → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Basil Adad, MDWalnut Creek, CA 945961487732574
- Nicole Daamen, MDWalnut Creek, CA 945961093893588
- Bryan Fong, MDWalnut Creek, CA 945961033297163
- Elizabeth Huang, MDWalnut Creek, CA 945961629156781
- Cornelius Jansen, MDWalnut Creek, CA 945961285712380
- Christopher Mascarinas, M.D.Walnut Creek, CA 945961952596744
- Glenn Schneider, MDWalnut Creek, CA 945961033297114
- Betty Tsai Do, MDWalnut Creek, CA 945961629293030
Common questions
What is Gregory Yu Chin, MD's NPI number?
Gregory Yu Chin, MD's National Provider Identifier (NPI) is 1710056924, issued on Nov 6, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Yu Chin, MD located?
The NPPES record lists a practice address at 1425 S Main St, Walnut Creek, CA, 94596. Phone: (925) 295-4000. Providers update this record themselves, so call before visiting.
How can I verify Gregory Yu Chin, MD's license?
NPPES lists California license number A70131, 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 Gregory Yu Chin, MD prescribe under Medicare Part D?
In 2024, Gregory Yu Chin, MD had 146 Medicare Part D claims for 70 beneficiaries; the average among otolaryngology physician prescribers was 541. 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.