Suyi Chang, MD
Gastroenterology Physician · Walnut Creek, CA
Suyi Chang, MD is a gastroenterology physician with a practice address in Walnut Creek, California, and NPI 1972681468, issued on Nov 1, 2006. Check the license (California A73603, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Suyi Chang
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A73603 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 1, 2006
- Record last updated
- Dec 13, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040901000998); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 1999
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 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.
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- 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 Suyi Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A73603Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% fewer Medicare Part D claims than the average gastroenterology physician in 2024
537 Medicare Part D claims for 212 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Gavilyte-C110 claims
- Omeprazole32 claims
- Diphenoxylate-Atropine27 claims
- Amjevita(Cf) Autoinjector20 claims
- Mesalamine20 claims
- Xifaxan20 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 IncAntioch, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Suyi Chang among 2,140 gastroenterology physician records in California
Suyi Chang, MD is one of 2,140 gastroenterology physician records with a practice address in California. 83% 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, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1999 · median 2002 among the 1,538 with a school on file
- Record last updated2021 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Walnut Creek → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Eugene Chan, MDWalnut Creek, CA 945961528146610
- Daniel Chung, MDWalnut Creek, CA 945961063590552
- Ming Fang, MDWalnut Creek, CA 945961366520199
- Steven Fredman, MDWalnut Creek, CA 945961861570962
- Theodore Levin, MDWalnut Creek, CA 945961720166820
- Oliver Lin, M.D.Walnut Creek, CA 945961497981575
- Katharine Ozeki, M.D.Walnut Creek, CA 945961306290838
- Martha Turchyn-Mazuryk, MDWalnut Creek, CA 945961497821979
Common questions
What is Suyi Chang, MD's NPI number?
Suyi Chang, MD's National Provider Identifier (NPI) is 1972681468, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Suyi Chang, 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 Suyi Chang, MD's license?
NPPES lists California license number A73603, 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 Suyi Chang, MD prescribe under Medicare Part D?
In 2024, Suyi Chang, MD had 537 Medicare Part D claims for 212 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.