NPPES file of Aug 9, 2026

Tammy Chen, NURSE PRACTITIONER

Adult Health Nurse Practitioner · Fullerton, CA

Tammy Chen, NURSE PRACTITIONER is an adult health nurse practitioner with a practice address in Fullerton, California, and NPI 1255792875, issued on Mar 9, 2016. Check the license (California NP95003688, as entered in NPPES) with the California board that licenses this profession; 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
1255792875
Name
Tammy Chen
Credential
NURSE PRACTITIONER
Primary taxonomy
Adult Health Nurse Practitioner 363LA2200X
License number
NP95003688 CA
Self-reported in NPPES; status is on the state search
Practice location
150 Laguna RD Ste A, Fullerton, CA 92835
Phone
(714) 525-8822
Enumerated
Mar 9, 2016
Record last updated
Dec 19, 2018 (not updated in 8 years: call before relying on the address or phone)
Fax
(714) 525-5193
Medicare enrollment
Enrolled (PECOS I20160706000237); accepts Medicare assignment
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 adult health nurse practitioner records → All 1,405 in California → Look up another NPI →

Also registered at 150 Laguna RD Ste A

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

  1. Stephanie Armas, FNPFamily Nurse Practitioner1174147581
  2. Joseph Ho, M.D.Interventional Pain Medicine Physician1285856609
  3. Wei Kwok, M.D.Pain Medicine (Anesthesiology) Physician1861430902
  4. Thomas Phan, MDInterventional Pain Medicine Physician1972999753
  5. Soo Bin SonAcupuncturist1639825045

Verify Tammy Chen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license NP95003688    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
Find the California license search

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36% more Medicare Part D claims than the average adult health nurse practitioner in 2024

1,735 Medicare Part D claims for 207 beneficiaries, against an average of 1,280 among the 16,937 providers of this specialty who prescribed in Part D. Brand-name drugs were 2% of claims. 743 claims were for opioids.

  1. Tammy Chen1,735
  2. Specialty average1,280

Most prescribed

  1. Hydrocodone-Acetaminophen456 claims
  2. Gabapentin277 claims
  3. Tizanidine Hcl178 claims
  4. Tramadol Hcl126 claims
  5. Pregabalin122 claims
  6. Cyclobenzaprine Hcl87 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: $16.21

1 payment: food and beverage; the largest payer was Boston Scientific Corporation. The 12,291 providers of this specialty with any payment received $946.40 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Tammy Chen$16.21
  2. Specialty average$946.40

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. Hoag ClinicNewport Beach, CA

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

Tammy Chen among 1,405 adult health nurse practitioner records in California

Tammy Chen, NURSE PRACTITIONER is one of 1,405 adult health nurse practitioner records with a practice address in California. 56% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 68% of them.

  • NPI issued2016 · 68% of these records are older, 27% newer
  • In a Medicare fileYes · 56% of these records are
  • In the CMS Doctors and Clinicians fileYes · 31% of these records are
  • Graduated2015 · median 2013 among the 441 with a school on file
  • Record last updated2018 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Adult Health Nurse Practitioner providers in California

There are 1,405 adult health nurse practitioner records in California.

All 1,405 in California → Every provider in Fullerton → Adult Health Nurse Practitioner nationwide →

The 8 adult health nurse practitioner records with the nearest ZIP codes

  1. Diane Gleeson, NPFullerton, CA 928351417129131
  2. Lisa Hanna, NP-CFullerton, CA 928351568763043
  3. Alicia Lever, NPFullerton, CA 928351346306784
  4. Tae Yoon, NPFullerton, CA 928351205542834
  5. Saba TesfayFullerton, CA 928331013311471
  6. Jose Peven Jumilla AriolaFullerton, CA 928321386596963
  7. Shieun HongGarden Grove, CA 928431922467299
  8. Jung Eun Yim, N.PGarden Grove, CA 928441043643737

Common questions

What is Tammy Chen, NURSE PRACTITIONER's NPI number?

Tammy Chen, NURSE PRACTITIONER's National Provider Identifier (NPI) is 1255792875, issued on Mar 9, 2016. An NPI identifies a provider in billing; it is not a license.

Where is Tammy Chen, NURSE PRACTITIONER located?

The NPPES record lists a practice address at 150 Laguna RD Ste A, Fullerton, CA, 92835. Phone: (714) 525-8822. Providers update this record themselves, so call before visiting.

How can I verify Tammy Chen, NURSE PRACTITIONER's license?

NPPES lists California license number NP95003688, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Tammy Chen, NURSE PRACTITIONER prescribe under Medicare Part D?

In 2024, Tammy Chen, NURSE PRACTITIONER had 1,735 Medicare Part D claims for 207 beneficiaries; the average among adult health nurse practitioner prescribers was 1,280. 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.