NPPES file of Aug 9, 2026

Sarom Pyun, M.D.

Family Medicine Physician · Diamond Bar, CA

Sarom Pyun, M.D. is a family medicine physician with a practice address in Diamond Bar, California, and NPI 1104264472, issued on Jun 10, 2013. Check the license (California A134211, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1104264472
Name
Sarom Pyun
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
A134211 CA
Self-reported in NPPES; status is on the state search
Practice location
1514 Valley Vista Dr, Diamond Bar, CA 91765
Phone
(909) 860-1144
Enumerated
Jun 10, 2013
Record last updated
Nov 9, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20171012003540); accepts Medicare assignment
Medical or professional school
University Of California, Irvine, California College Of Medicine, 2013
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →

Also registered at 1514 Valley Vista Dr

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Wilfredo Alejo, M.D.Pediatrics Physician1114990785
  2. Silvia Alonzo, MS, PA-CMedical Physician Assistant1942586623
  3. Jing Chen, M.D.Pediatrics Physician1699208942
  4. William FenertyFamily Medicine Physician1184625915
  5. Brian Koffman, MDFamily Medicine Physician1326049164
  6. Keli Layton-Cunnigan, PAPhysician Assistant1063613958

Verify Sarom Pyun in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A134211    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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49% fewer Medicare Part D claims than the average family medicine physician in 2024

1,792 Medicare Part D claims for 207 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.

  1. Sarom Pyun1,792
  2. Specialty average3,544

Most prescribed

  1. Atorvastatin Calcium155 claims
  2. Amlodipine Besylate146 claims
  3. Losartan Potassium115 claims
  4. Rosuvastatin Calcium103 claims
  5. Levothyroxine Sodium59 claims
  6. Pravastatin Sodium53 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: $184.77

7 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Sarom Pyun$184.77
  2. Specialty average$902.55

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Providence Medical FoundationDiamond Bar, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Sarom Pyun among 17,133 family medicine physician records in California

Sarom Pyun, M.D. is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 68% of them.

  • NPI issued2013 · 68% of these records are older, 29% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated2013 · median 2005 among the 10,652 with a school on file
  • Record last updated2021 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

25 family medicine physician records list a practice address in Diamond Bar

They are 25 of the 598 NPPES records with a practice address in Diamond Bar, and 17,133 family medicine physician records in California.

All 17,133 in California → Every provider in Diamond Bar → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. William FenertyDiamond Bar, CA 917651184625915
  2. John Fonmin, MDDiamond Bar, CA 917651629147319
  3. David Hsieh, M.D.Diamond Bar, CA 917651891919874
  4. Lubna Isho, DODiamond Bar, CA 917651851350797
  5. Brian Koffman, MDDiamond Bar, CA 917651326049164
  6. Yann Ping Pan, MDDiamond Bar, CA 917651114250925
  7. David Rhodes, MDDiamond Bar, CA 917651518968353
  8. Yvonne Rodriguez Lawson, MDDiamond Bar, CA 917651912967233

Common questions

What is Sarom Pyun, M.D.'s NPI number?

Sarom Pyun, M.D.'s National Provider Identifier (NPI) is 1104264472, issued on Jun 10, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Sarom Pyun, M.D. located?

The NPPES record lists a practice address at 1514 Valley Vista Dr, Diamond Bar, CA, 91765. Phone: (909) 860-1144. Providers update this record themselves, so call before visiting.

How can I verify Sarom Pyun, M.D.'s license?

NPPES lists California license number A134211, 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 Sarom Pyun, M.D. prescribe under Medicare Part D?

In 2024, Sarom Pyun, M.D. had 1,792 Medicare Part D claims for 207 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.