Ian Y.h. Lin, MD
Internal Medicine Physician · San Mateo, CA
Ian Y.h. Lin, MD is an internal medicine physician with a practice address in San Mateo, California, and NPI 1245306836, issued on Nov 27, 2006. Check the license (California A054669, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Ian Y.h. Lin
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A054669 CA
Self-reported in NPPES; status is on the state search - Practice location
- 417 N San Mateo Dr, San Mateo, CA 94401
- Phone
- (650) 524-1925
- Enumerated
- Nov 27, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (650) 215-9919
- Medicare enrollment
- Enrolled (PECOS I20111215000871); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 1994
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 417 N San Mateo Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sue Lin, L.AC.Acupuncturist1013083864
Verify Ian Y.h. Lin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A054669Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Ian Y.h. Lin among 17,696 internal medicine physician records in California
Ian Y.h. Lin, MD 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 not. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1994 · median 2004 among the 11,065 with a school on file
- Record last updated2007 · 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).
44 internal medicine physician records list a practice address in San Mateo
They are 44 of the 3,909 NPPES records with a practice address in San Mateo, and 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,696 in California → Every provider in San Mateo → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jack Bernstein, MDSan Mateo, CA 944011457301384
- Amy Daniher, M.D.San Mateo, CA 944011831121425
- Mary Dobbins, M.D.San Mateo, CA 944011407837693
- Terry Farrow, MDSan Mateo, CA 944011750427753
- Umesh Gheewala, M.D.San Mateo, CA 944011982608568
- Paul Jemelian, MDSan Mateo, CA 944011639190861
- Hoa Le, MDSan Mateo, CA 944011952356917
- Timothy Offensend, MDSan Mateo, CA 944011083667539
Common questions
What is Ian Y.h. Lin, MD's NPI number?
Ian Y.h. Lin, MD's National Provider Identifier (NPI) is 1245306836, issued on Nov 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ian Y.h. Lin, MD located?
The NPPES record lists a practice address at 417 N San Mateo Dr, San Mateo, CA, 94401. Phone: (650) 524-1925. Providers update this record themselves, so call before visiting.
How can I verify Ian Y.h. Lin, MD's license?
NPPES lists California license number A054669, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.