Lydia Hui-Ling Chan, M.D.
Internal Medicine Physician · San Francisco, CA
Lydia Hui-Ling Chan, M.D. is an internal medicine physician with a practice address in San Francisco, California, and NPI 1578900452, issued on May 31, 2013. Check the license (California 137928, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lydia Hui-Ling Chan
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 137928 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2674 San Bruno Avenue, San Francisco, CA 94134
- Phone
- (415) 750-5909
- Enumerated
- May 31, 2013
- Record last updated
- Jun 27, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (415) 750-5910
- Medicare enrollment
- Enrolled (PECOS I20160516000276); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Lydia Hui-Ling Chan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 137928Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% more Medicare Part D claims than the average internal medicine physician in 2024
3,505 Medicare Part D claims for 306 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Atorvastatin Calcium475 claims
- Losartan Potassium240 claims
- Amlodipine Besylate220 claims
- Alendronate Sodium123 claims
- Gabapentin120 claims
- Triamcinolone Acetonide108 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
- North East Medical ServicesSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lydia Hui-Ling Chan among 17,696 internal medicine physician records in California
Lydia Hui-Ling 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 2013, is newer than 71% of them.
- NPI issued2013 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2012 · median 2004 among the 11,065 with a school on file
- Record last updated2019 · 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).
1,318 internal medicine physician records list a practice address in San Francisco
They are 1,318 of the 38,143 NPPES records with a practice address in San Francisco, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Francisco → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Zhe Cai, M.D.San Francisco, CA 941341114180916
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- Sai-Sun Ho, M.D.San Francisco, CA 941341710952957
- Ted Li, MDSan Francisco, CA 941341851470611
- Hnin Pyie Phyoe Aung, MDSan Francisco, CA 941331851087738
- Lily ChuSan Francisco, CA 941331700346475
- Judy Hsu, MDSan Francisco, CA 941331043384050
- Jack Huynh, MDSan Francisco, CA 941331548334543
Common questions
What is Lydia Hui-Ling Chan, M.D.'s NPI number?
Lydia Hui-Ling Chan, M.D.'s National Provider Identifier (NPI) is 1578900452, issued on May 31, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Lydia Hui-Ling Chan, M.D. located?
The NPPES record lists a practice address at 2674 San Bruno Avenue, San Francisco, CA, 94134. Phone: (415) 750-5909. Providers update this record themselves, so call before visiting.
How can I verify Lydia Hui-Ling Chan, M.D.'s license?
NPPES lists California license number 137928, 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 Lydia Hui-Ling Chan, M.D. prescribe under Medicare Part D?
In 2024, Lydia Hui-Ling Chan, M.D. had 3,505 Medicare Part D claims for 306 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.