NPPES file of Aug 9, 2026

John Thanasukarn, M.D.

Pediatrics Physician · Downey, CA

John Thanasukarn, M.D. is a pediatrics physician with a practice address in Downey, California, and NPI 1144674003, issued on Apr 18, 2016. Check the license (California A156685, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1144674003
Name
John Thanasukarn
Credential
M.D.
Primary taxonomy
Pediatrics Physician 208000000X
License number
A156685 CA
Self-reported in NPPES; status is on the state search
Practice location
8530 Firestone Blvd, Downey, CA 90241
Phone
(562) 867-7999
Enumerated
Apr 18, 2016
Record last updated
Oct 7, 2025
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →

Also registered at 8530 Firestone Blvd

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

  1. Elizabeth AguilaCommunity Health Worker1902384456
  2. Guadalupe AndradeCase Manager/Care Coordinator1245037837
  3. Nicole Cervantes, M.D.Internal Medicine Physician1174985816
  4. Rebecca Chohlas-Wood, MDGeneral Practice Physician1700267465
  5. Amber Harris, DCChiropractor1639937568
  6. Nicole HernandezPrimary Care Nurse Practitioner1861162679

Verify John Thanasukarn in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A156685    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

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John Thanasukarn among 9,272 pediatrics physician records in California

John Thanasukarn, M.D. is one of 9,272 pediatrics physician records with a practice address in California. 31% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2016, is newer than 81% of them.

  • NPI issued2016 · 81% of these records are older, 17% newer
  • In a Medicare fileNo · 31% of these records are
  • In the CMS Doctors and Clinicians fileNo · 8% of these records are
  • Record last updated2025 · 65% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pediatrics Physician providers in California

There are 9,272 pediatrics physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 9,272 in California → Every provider in Downey → Pediatrics Physician nationwide →

The 8 pediatrics physician records with the nearest ZIP codes

  1. David Aguilar, M.D.Downey, CA 902411730291287
  2. Jose Diaz, M.DDowney, CA 902411427078781
  3. Seema Latif, M.D.Downey, CA 902411942215686
  4. Rita Roy, M.D.Downey, CA 902411306900832
  5. Ferdinand Shamiyeh, M.D.Downey, CA 902411104183961
  6. Bala Venugopal, M.D.Downey, CA 902411952352734
  7. Ran Zhu, M.D.Downey, CA 902411790044691
  8. Jocelyn Zuniga, M.D.Downey, CA 902411386682623

Common questions

What is John Thanasukarn, M.D.'s NPI number?

John Thanasukarn, M.D.'s National Provider Identifier (NPI) is 1144674003, issued on Apr 18, 2016. An NPI identifies a provider in billing; it is not a license.

Where is John Thanasukarn, M.D. located?

The NPPES record lists a practice address at 8530 Firestone Blvd, Downey, CA, 90241. Phone: (562) 867-7999. Providers update this record themselves, so call before visiting.

How can I verify John Thanasukarn, M.D.'s license?

NPPES lists California license number A156685, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.