Jason S. Paek, M.D.
Internal Medicine Physician · Rowland Heights, CA
Jason S. Paek, M.D. is an internal medicine physician with a practice address in Rowland Heights, California, and NPI 1770679631, issued on Oct 5, 2006. Check the license (California G58208, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jason S. Paek
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G58208 CA
Self-reported in NPPES; status is on the state search - Practice location
- 18773 Colima RD, Rowland Heights, CA 91748
- Phone
- (626) 986-4899
- Enumerated
- Oct 5, 2006
- Record last updated
- Jan 9, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (626) 986-4855
- Medicaid ID
- 00G582081 CA
- Medicare enrollment
- Enrolled (PECOS I20100909000505); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1985
- 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 18773 Colima RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cindy ChungMedical Physician Assistant1831732445
- Jihee Kim, FNPFamily Nurse Practitioner1194395053
- Sohyun LimPhysician Assistant1821506775
- Sujin Yang, NPFamily Nurse Practitioner1750028023
Verify Jason S. Paek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G58208Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10.7 times the Medicare Part D claims of the average internal medicine physician in 2024
33,860 Medicare Part D claims for 1,717 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 115 claims were for opioids.
Most prescribed
- Atorvastatin Calcium2,763 claims
- Amlodipine Besylate2,231 claims
- Losartan Potassium1,632 claims
- Metformin Hcl1,425 claims
- Omeprazole1,364 claims
- Celecoxib964 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.
Industry payments in 2024: $1,630.25
79 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Jason S. Paek among 17,696 internal medicine physician records in California
Jason S. Paek, 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 fileYes · 63% of these records are
- Graduated1985 · median 2004 among the 11,065 with a school on file
- Record last updated2019 · 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).
9 internal medicine physician records list a practice address in Rowland Heights
They are 9 of the 816 NPPES records with a practice address in Rowland Heights, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Rowland Heights → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Wei Bao, M.D.City Of Industry, CA 917481437199304
- Kuo Hsien Chang, MDRowland Heights, CA 917481851392922
- Yongqing Feng, M.D.Rowland Heights, CA 917481497806988
- John Lee, MDFullerton, CA 917481598721284
- Zune Liu, MDRowland Heights, CA 917481619069838
- Rosel Liza Reyes, M.D.Rowland Heights, CA 917481285886978
- Chia-Yu Teng, M.D.City Of Industry, CA 917481902839160
- Hsiu-Ying Tseng, D.O.Rowland Heights, CA 917481689683831
Common questions
What is Jason S. Paek, M.D.'s NPI number?
Jason S. Paek, M.D.'s National Provider Identifier (NPI) is 1770679631, issued on Oct 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jason S. Paek, M.D. located?
The NPPES record lists a practice address at 18773 Colima RD, Rowland Heights, CA, 91748. Phone: (626) 986-4899. Providers update this record themselves, so call before visiting.
How can I verify Jason S. Paek, M.D.'s license?
NPPES lists California license number G58208, 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 Jason S. Paek, M.D. prescribe under Medicare Part D?
In 2024, Jason S. Paek, M.D. had 33,860 Medicare Part D claims for 1,717 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.