Teh Shan Liang, M.D.
Internal Medicine Physician · La Mesa, CA
Teh Shan Liang, M.D. is an internal medicine physician with a practice address in La Mesa, California, and NPI 1255340535, issued on Aug 5, 2006. Check the license (California A61596, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Teh Shan Liang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A61596 CA
Self-reported in NPPES; status is on the state search - Practice location
- 5525 Grossmont Center Dr, La Mesa, CA 91942
- Phone
- (858) 499-2600
- Enumerated
- Aug 5, 2006
- Record last updated
- Jun 24, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (619) 644-6809
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 5525 Grossmont Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Mary Alexander, M.D.Internal Medicine Physician1538177845
- James Amberg, MDFamily Medicine Physician1265497093
Verify Teh Shan Liang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A61596Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 73.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Teh Shan Liang among 17,696 internal medicine physician records in California
Teh Shan 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 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 fileNo · 63% of these records are
- Record last updated2013 · 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).
61 internal medicine physician records list a practice address in La Mesa
They are 61 of the 2,168 NPPES records with a practice address in La Mesa, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in La Mesa → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ali Alamar, M.D.La Mesa, CA 919421972606374
- Mary Alexander, M.D.La Mesa, CA 919421538177845
- Felicia Briones-Colman, M.D.La Mesa, CA 919421962517367
- Robert Foster, MDLa Mesa, CA 919421871593756
- Eva Leonard, M.D.La Mesa, CA 919421386602746
- Douglas Levey, M.D.La Mesa, CA 919421932210523
- Ellyn Levine, M.D.La Mesa, CA 919421760470546
- Victor Seikaly, M.D.La Mesa, CA 919421235158320
Common questions
What is Teh Shan Liang, M.D.'s NPI number?
Teh Shan Liang, M.D.'s National Provider Identifier (NPI) is 1255340535, issued on Aug 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Teh Shan Liang, M.D. located?
The NPPES record lists a practice address at 5525 Grossmont Center Dr, La Mesa, CA, 91942. Phone: (858) 499-2600. Providers update this record themselves, so call before visiting.
How can I verify Teh Shan Liang, M.D.'s license?
NPPES lists California license number A61596, 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.
What is Teh Shan Liang, M.D.'s MIPS final score?
The 2023 MIPS final score is 73.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.