NPPES file of Aug 9, 2026

Heather Williams

Specialist · Duarte, CA

Heather Williams is a specialist with a practice address in Duarte, California, and NPI 1770453607, issued on Nov 6, 2025. Check the license with the California board that licenses this profession; 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
1770453607
Name
Heather Williams
Primary taxonomy
Specialist 174400000X
Practice location
1401 Highland Ave, Duarte, CA 91010
Phone
(657) 321-4000
Enumerated
Nov 6, 2025
Record last updated
Nov 6, 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 specialist records → All 5,749 in California → Look up another NPI →

Also registered at 1401 Highland Ave

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

  1. Austin Davis, PPSSchool Psychologist1811886807
  2. Maureen Davis, PSY DPsychologist1679462675
  3. Gregory Endelman, LEPPsychologist1265174940
  4. John Michael GonzalezSchool Psychologist1073483731
  5. Ann KangHealth & Wellness Coach1528940285
  6. Sean KerrHealth & Wellness Coach1821970591

Verify Heather Williams in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this professionCheck 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
Find 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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Heather Williams among 5,749 specialist records in California

Heather Williams is one of 5,749 specialist 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 not. Its NPI, issued in 2025, is newer than 96% of them.

  • NPI issued2025 · 96% of these records are older, 2% newer
  • In a Medicare fileNo · 30% of these records are
  • In the CMS Doctors and Clinicians fileNo · 19% of these records are
  • Record last updated2025 · 77% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Specialist providers in California

There are 5,749 specialist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 5,749 in California → Every provider in Duarte → Specialist nationwide →

The 8 specialist records with the nearest ZIP codes

  1. Theodore Krontiris, M.D., PH.D.Duarte, CA 910101356576029
  2. Wai Szeto, MDDuarte, CA 910101861055766
  3. Charles Imbus, MDArcadia, CA 910071912999764
  4. Scott Nelson, M.D.Arcadia, CA 910071982687042
  5. Michael Perera, M.D.Arcadia, CA 910071710918222
  6. Andreas Subadya, M.D.Arcadia, CA 910071528148350
  7. Senlin WangArcadia, CA 910071629674080
  8. Dana Kang, MDArcadia, CA 910061982803813

Common questions

What is Heather Williams's NPI number?

Heather Williams's National Provider Identifier (NPI) is 1770453607, issued on Nov 6, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Heather Williams located?

The NPPES record lists a practice address at 1401 Highland Ave, Duarte, CA, 91010. Phone: (657) 321-4000. Providers update this record themselves, so call before visiting.

How can I verify Heather Williams's license?

Search the California board that licenses this profession; the NPPES record confirms identity 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. 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.