Tha Sok, DO
Internal Medicine Physician · Montclair, CA
Tha Sok, DO is an internal medicine physician with a practice address in Montclair, California, and NPI 1396431656, issued on Apr 11, 2023. Check the license (California 20A25412, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Tha Sok
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A25412 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9525 Monte Vista Ave Unit 105, Montclair, CA 91763
- Phone
- (909) 626-1205
- Enumerated
- Apr 11, 2023
- Record last updated
- Jun 29, 2026
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 9525 Monte Vista Ave Unit 105
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dion Kencana, MDInternal Medicine Physician1528709805
Verify Tha Sok in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A25412Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
250 Medicare Part D claims for 66 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Lisinopril20 claims
- Atorvastatin Calcium16 claims
- Losartan Potassium11 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.
Tha Sok among 17,696 internal medicine physician records in California
Tha Sok, DO 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 2023, is newer than 98% of them.
- NPI issued2023 · 98% of these records are older, under 1% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2026 · 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).
12 internal medicine physician records list a practice address in Montclair
They are 12 of the 1,301 NPPES records with a practice address in Montclair, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Montclair → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mohammed Al-Khayyat, M.D.Montclair, CA 917631588195424
- Khanh Duong, MDMontclair, CA 917631225528466
- Dion Kencana, MDMontclair, CA 917631528709805
- Sadia Khan, MDMontclair, CA 917631225271125
- George Moran, MDMontclair, CA 917631639673635
- Kiandokht Partovi, M.D.Montclair, CA 917631689763427
- Atif Qadeer, MDMontclair, CA 917631730160201
- Ali Salem, M.D.Montclair, CA 917631376983122
Common questions
What is Tha Sok, DO's NPI number?
Tha Sok, DO's National Provider Identifier (NPI) is 1396431656, issued on Apr 11, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Tha Sok, DO located?
The NPPES record lists a practice address at 9525 Monte Vista Ave Unit 105, Montclair, CA, 91763. Phone: (909) 626-1205. Providers update this record themselves, so call before visiting.
How can I verify Tha Sok, DO's license?
NPPES lists California license number 20A25412, 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 Tha Sok, DO prescribe under Medicare Part D?
In 2024, Tha Sok, DO had 250 Medicare Part D claims for 66 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.