Mark Y. Liang, M.D.
Internal Medicine Physician · Fremont, CA
Mark Y. Liang, M.D. is an internal medicine physician with a practice address in Fremont, California, and NPI 1578889416, issued on Apr 16, 2010. Check the license (California A119336, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Y. Liang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A119336 CA
Self-reported in NPPES; status is on the state search - Practice location
- 46690 Mohave Dr, Fremont, CA 94539
- Phone
- (510) 248-1065
- Enumerated
- Apr 16, 2010
- Record last updated
- Apr 13, 2022
- Medicare enrollment
- Enrolled (PECOS I20140806002424); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 46690 Mohave Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Magin Alexander, MDInternal Medicine Physician1144782673
- Shelli Bodnar, M.D.Family Medicine Physician1194810119
- Thomas Collins-Pallett, M.D.Family Medicine Physician1669834305
- Steven Curran, M.D.Family Medicine Physician1871688861
- Kathleen Vigano, P.A.Physician Assistant1033441175
- Wen Yang, NPFamily Nurse Practitioner1194485557
Verify Mark Y. Liang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A119336Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% more Medicare Part D claims than the average internal medicine physician in 2024
3,851 Medicare Part D claims for 428 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Atorvastatin Calcium746 claims
- Amlodipine Besylate469 claims
- Rosuvastatin Calcium354 claims
- Losartan Potassium283 claims
- Metformin Hcl Er211 claims
- Levothyroxine Sodium160 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
- Washington Township Medical FoundationFremont, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Y. Liang among 17,696 internal medicine physician records in California
Mark Y. Liang, 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 2010, is newer than 63% of them.
- NPI issued2010 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2010 · median 2004 among the 11,065 with a school on file
- Record last updated2022 · 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).
125 internal medicine physician records list a practice address in Fremont
They are 125 of the 4,749 NPPES records with a practice address in Fremont, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Fremont → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Magin Alexander, MDFremont, CA 945391144782673
- Ana Elisei, MDFremont, CA 945391508054479
- Pushpa Jagtiani, MD.Fremont, CA 945391811243892
- Chai-Kiong Lau, M.D.Fremont, CA 945391912957309
- Jiin Lin, M.D.Fremont, CA 945391306813183
- Daniel Taylor, M.D.Fremont, CA 945391134201494
- Paul Aguilera, MDFremont, CA 945381023639804
- Garrett Chan, MDFremont, CA 945381629728449
Common questions
What is Mark Y. Liang, M.D.'s NPI number?
Mark Y. Liang, M.D.'s National Provider Identifier (NPI) is 1578889416, issued on Apr 16, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Mark Y. Liang, M.D. located?
The NPPES record lists a practice address at 46690 Mohave Dr, Fremont, CA, 94539. Phone: (510) 248-1065. Providers update this record themselves, so call before visiting.
How can I verify Mark Y. Liang, M.D.'s license?
NPPES lists California license number A119336, 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 Mark Y. Liang, M.D. prescribe under Medicare Part D?
In 2024, Mark Y. Liang, M.D. had 3,851 Medicare Part D claims for 428 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.