Simon Chi Yan Chan, M.D.
Internal Medicine Physician · Grass Valley, CA
Simon Chi Yan Chan, M.D. is an internal medicine physician with a practice address in Grass Valley, California, and NPI 1063431179, issued on Jul 19, 2006. Check the license (California A70465, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Simon Chi Yan Chan
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A70465 CA
Self-reported in NPPES; status is on the state search - Practice location
- 150 Catherine LN, Grass Valley, CA 95945
- Phone
- (530) 477-9100
- Enumerated
- Jul 19, 2006
- Record last updated
- Jun 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (530) 477-2033
- Medicaid ID
- 00A704650 CA
- Medicare enrollment
- Enrolled (PECOS I20050112000689); accepts Medicare assignment
- Medical or professional school
- New York University School Of Medicine, 1995
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 150 Catherine LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Simon Chi Yan Chan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A70465Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average internal medicine physician in 2024
478 Medicare Part D claims for 171 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Lansoprazole40 claims
- Sucralfate40 claims
- Amlodipine Besylate35 claims
- Metoprolol Succinate28 claims
- Atorvastatin Calcium23 claims
- Amoxicillin-Clavulanate Potass18 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: $21.63
1 payment: food and beverage; the largest payer was Kedrion Biopharma, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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
- Shasta Regional Medical Group IncRedding, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Simon Chi Yan Chan among 17,696 internal medicine physician records in California
Simon Chi Yan Chan, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1995 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
22 internal medicine physician records list a practice address in Grass Valley
They are 22 of the 1,540 NPPES records with a practice address in Grass Valley, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Grass Valley → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Michael Andya, M.D.Grass Valley, CA 959451760428452
- Nancy Bleile, MDGrass Valley, CA 959451144246158
- Nicholas Browning, M.D.Grass Valley, CA 959451487610309
- Stuart Campbell, M.D.Grass Valley, CA 959451306842588
- Sherilynn Cooke, MDGrass Valley, CA 959451427136506
- Fouzia Godil, M.D.Grass Valley, CA 959451942268792
- Eric Holtrop, M.D.Grass Valley, CA 959451881790459
- Andrew Ing, MDGrass Valley, CA 959451053409714
Common questions
What is Simon Chi Yan Chan, M.D.'s NPI number?
Simon Chi Yan Chan, M.D.'s National Provider Identifier (NPI) is 1063431179, issued on Jul 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Simon Chi Yan Chan, M.D. located?
The NPPES record lists a practice address at 150 Catherine LN, Grass Valley, CA, 95945. Phone: (530) 477-9100. Providers update this record themselves, so call before visiting.
How can I verify Simon Chi Yan Chan, M.D.'s license?
NPPES lists California license number A70465, 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 Simon Chi Yan Chan, M.D. prescribe under Medicare Part D?
In 2024, Simon Chi Yan Chan, M.D. had 478 Medicare Part D claims for 171 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.