William K.y. Chen, M.D.
Gastroenterology Physician · Roseville, CA
William K.y. Chen, M.D. is a gastroenterology physician with a practice address in Roseville, California, and NPI 1982744942, issued on Feb 7, 2007. Check the license (California G57578, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William K.y. Chen
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- G57578 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5 Medical Plaza Dr Ste 140, Roseville, CA 95661
- Phone
- (916) 878-4940
- Enumerated
- Feb 7, 2007
- Record last updated
- Apr 16, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080818000590); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 5 Medical Plaza Dr Ste 140
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Katherine ChinFamily Nurse Practitioner1063863785
- Shilpa Lingala, M.D.Gastroenterology Physician1477866705
- David Pompa, MDGastroenterology Physician1114001104
Verify William K.y. Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G57578Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average gastroenterology physician in 2024
17 Medicare Part D claims, against an average of 811 among the 16,445 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: $18.56
1 payment: food and beverage; the largest payer was RedHill Biopharma Inc. The 13,350 providers of this specialty with any payment received $5,015.95 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
- Sutter Valley Medical FoundationRoseville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William K.y. Chen among 2,140 gastroenterology physician records in California
William K.y. Chen, M.D. 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 2007, is newer than 52% of them.
- NPI issued2007 · 52% of these records are older, 37% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated1983 · median 2002 among the 1,538 with a school on file
- Record last updated2020 · 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 Roseville → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Sreepriya Balasubramanian, MDRoseville, CA 956611922186642
- John Canio, M.D.Roseville, CA 956611598804346
- Rahul Dhillon, M.D.Roseville, CA 956611720283625
- Mahmoud Eltorai, MDRoseville, CA 956611316025083
- Theodor Feinstat, MDRoseville, CA 956611215063862
- Ronald Hsu, MDRoseville, CA 956611700912318
- Gerardo Lamiel, MDRoseville, CA 956611508944273
- Anand Madan, M.D.Roseville, CA 956611366418006
Common questions
What is William K.y. Chen, M.D.'s NPI number?
William K.y. Chen, M.D.'s National Provider Identifier (NPI) is 1982744942, issued on Feb 7, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William K.y. Chen, M.D. located?
The NPPES record lists a practice address at 5 Medical Plaza Dr Ste 140, Roseville, CA, 95661. Phone: (916) 878-4940. Providers update this record themselves, so call before visiting.
How can I verify William K.y. Chen, M.D.'s license?
NPPES lists California license number G57578, 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 William K.y. Chen, M.D. prescribe under Medicare Part D?
In 2024, William K.y. Chen, M.D. had 17 Medicare Part D claims; 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.