Thomas C. Lian, M.D.
Psychiatry Physician · San Diego, CA
Thomas C. Lian, M.D. is a psychiatry physician with a practice address in San Diego, California, and NPI 1770594616, issued on Aug 10, 2006. Check the license (California G60506, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas C. Lian
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- G60506 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4077 Fifth Ave, San Diego, CA 92103
- Phone
- (619) 220-8114
- Enumerated
- Aug 10, 2006
- Record last updated
- Dec 15, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (801) 253-9831
- Medicare enrollment
- Enrolled (PECOS I20040601001326); may accept Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1985
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 4077 Fifth Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Buraq Al Ghaieb, MDHospitalist Physician1831891712
- Noorhan Amani, MDStudent in an Organized Health Care Education/Training Program1922946755
- William Anapoell, MDHospitalist Physician1982631289
Verify Thomas C. Lian in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G60506Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average psychiatry physician in 2024
96 Medicare Part D claims for 19 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Levetiracetam16 claims
- Metformin Hcl13 claims
- Atenolol12 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
- ON Call Specialists Medical Group OF San Diego IncSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas C. Lian among 8,673 psychiatry physician records in California
Thomas C. Lian, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% 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 2% of them.
- NPI issued2006 · 2% of these records are older, 67% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated1985 · median 2005 among the 3,295 with a school on file
- Record last updated2020 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in California
There are 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in San Diego → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Olga Becker, M.D.San Diego, CA 921031083644710
- Tahir Bhatti, M.D.San Diego, CA 921031518915487
- Gregory Bishop, M.D.San Diego, CA 921031003855545
- Joel Dimsdale, M.D.San Diego, CA 921031306877568
- Jeremy Hirst, M.D.San Diego, CA 921031073563714
- Katherine Immerman, M.D.San Diego, CA 921031023087939
- Walter Kaye, MDSan Diego, CA 921031922076223
- John Kelsoe, M.D.San Diego, CA 921031184672156
Common questions
What is Thomas C. Lian, M.D.'s NPI number?
Thomas C. Lian, M.D.'s National Provider Identifier (NPI) is 1770594616, issued on Aug 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas C. Lian, M.D. located?
The NPPES record lists a practice address at 4077 Fifth Ave, San Diego, CA, 92103. Phone: (619) 220-8114. Providers update this record themselves, so call before visiting.
How can I verify Thomas C. Lian, M.D.'s license?
NPPES lists California license number G60506, 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 Thomas C. Lian, M.D. prescribe under Medicare Part D?
In 2024, Thomas C. Lian, M.D. had 96 Medicare Part D claims for 19 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.