Tien-Hoa Ko, M.D.
Occupational Medicine Physician · Commerce, CA
Tien-Hoa Ko, M.D. is an occupational medicine physician with a practice address in Commerce, California, and NPI 1912915489, issued on Aug 3, 2006. Check the license (California G76493, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tien-Hoa Ko
- Credential
- M.D.
- Primary taxonomy
- Occupational Medicine Physician 2083X0100X
- License number
- G76493 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3430 Garfield Ave., Commerce, CA 90040
- Phone
- (818) 952-3453
- Enumerated
- Aug 3, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest occupational medicine physician records → All 415 in California → Look up another NPI →
Verify Tien-Hoa Ko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G76493Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average occupational medicine physician in 2024
24 Medicare Part D claims, against an average of 794 among the 463 providers of this specialty who prescribed in Part D.
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.
Tien-Hoa Ko among 415 occupational medicine physician records in California
Tien-Hoa Ko, M.D. is one of 415 occupational medicine physician records with a practice address in California. 30% 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, 57% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileNo · 12% of these records are
- Record last updated2007 · 75% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2083X0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Occupational Medicine Physician providers in California
There are 415 occupational medicine physician records in California.
All 415 in California → Every provider in Commerce → Occupational Medicine Physician nationwide →
The 8 occupational medicine physician records with the nearest ZIP codes
- James Lemus, MDLos Angeles, CA 900401851487359
- Marilyn ZwassLos Angeles, CA 900361831566934
- Marc Arnush, M.D., M.P.H.Los Angeles, CA 900451114125846
- Philip Baily, M.D.Los Angeles, CA 900451932223252
- Donna Cloughen, D.O.Los Angeles, CA 900451548381932
- Barry Huang, MDLos Angeles, CA 900451316961550
- Hai Le, M.D.Los Angeles, CA 900451427174887
- John Barone, D.O.Los Angeles, CA 900481982616116
Common questions
What is Tien-Hoa Ko, M.D.'s NPI number?
Tien-Hoa Ko, M.D.'s National Provider Identifier (NPI) is 1912915489, issued on Aug 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Tien-Hoa Ko, M.D. located?
The NPPES record lists a practice address at 3430 Garfield Ave., Commerce, CA, 90040. Phone: (818) 952-3453. Providers update this record themselves, so call before visiting.
How can I verify Tien-Hoa Ko, M.D.'s license?
NPPES lists California license number G76493, 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 Tien-Hoa Ko, M.D. prescribe under Medicare Part D?
In 2024, Tien-Hoa Ko, M.D. had 24 Medicare Part D claims; the average among occupational medicine physician prescribers was 794. 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.