NPPES file of Aug 9, 2026

Tammy Harper, NP-C

Adult Health Nurse Practitioner · Los Angeles, CA

Tammy Harper, NP-C is an adult health nurse practitioner with a practice address in Los Angeles, California, and NPI 1164537023, issued on Aug 20, 2006. Check the license (California NP10908, 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
1164537023
Name
Tammy Harper
Credential
NP-C
Primary taxonomy
Adult Health Nurse Practitioner 363LA2200X
License number
NP10908 CA
Self-reported in NPPES; status is on the state search
Practice location
1520 San Pablo St, Los Angeles, CA 90033
Phone
(323) 442-5100
Enumerated
Aug 20, 2006
Record last updated
Nov 27, 2023
Medicare enrollment
Enrolled (PECOS I20070116000631); accepts Medicare assignment
Medical or professional school
University Of California, Geffen School Of Medicine, 1999
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 1520 San Pablo St

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

  1. Frank Acosta, PHDPsychologist1750313490
  2. Gbemisola Adenuga, M.D.Nephrology Physician1952464661
  3. Aimee Aguillon, OTR/L, CHTOccupational Therapist1972677318
  4. Haig Aharonian, M.D.Internal Medicine Physician1205107653
  5. Jamshid Ahmadi, M.D.Neuroradiology Physician1942252028
  6. Mohammad Akmal, M.D.Nephrology Physician1356378087

Verify Tammy Harper 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 NP10908    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

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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18% fewer Medicare Part D claims than the average adult health nurse practitioner in 2024

1,045 Medicare Part D claims for 119 beneficiaries, against an average of 1,280 among the 16,937 providers of this specialty who prescribed in Part D.

  1. Tammy Harper1,045
  2. Specialty average1,280

Most prescribed

  1. Tacrolimus202 claims
  2. Pantoprazole Sodium76 claims
  3. Prednisone61 claims
  4. Furosemide52 claims
  5. Xifaxan49 claims
  6. Veltassa46 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: $289.64

8 payments; by number, the most common kind was food and beverage; the largest payer was Gilead Sciences, Inc. 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 Harper$289.64
  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. Usc Care Medical Group IncLos Angeles, CA

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

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

Tammy Harper, NP-C 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 2006, is newer than 3% of them.

  • NPI issued2006 · 3% of these records are older, 82% newer
  • In a Medicare fileYes · 56% of these records are
  • In the CMS Doctors and Clinicians fileYes · 31% of these records are
  • Graduated1999 · median 2013 among the 441 with a school on file
  • Record last updated2023 · 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 Los Angeles → Adult Health Nurse Practitioner nationwide →

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

  1. Sybil Cross, NP-CLos Angeles, CA 900331982823407
  2. Catherine Karen Digon, NPLos Angeles, CA 900331831528959
  3. Evelyne Fleury-Milfort, N.P.Los Angeles, CA 900331518996594
  4. Hoi Yan Kwong, NPLos Angeles, CA 900331881941250
  5. Marilyn Lee, NP-C (NURSE PRACTITILos Angeles, CA 900331558783258
  6. Ryan O'Malley, NP-CLos Angeles, CA 900331538521364
  7. Ryan Reformina, NP-CLos Angeles, CA 900331245635218
  8. Reiko Sasaki, NP-CLos Angeles, CA 900331891010930

Common questions

What is Tammy Harper, NP-C's NPI number?

Tammy Harper, NP-C's National Provider Identifier (NPI) is 1164537023, issued on Aug 20, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Tammy Harper, NP-C located?

The NPPES record lists a practice address at 1520 San Pablo St, Los Angeles, CA, 90033. Phone: (323) 442-5100. Providers update this record themselves, so call before visiting.

How can I verify Tammy Harper, NP-C's license?

NPPES lists California license number NP10908, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Tammy Harper, NP-C prescribe under Medicare Part D?

In 2024, Tammy Harper, NP-C had 1,045 Medicare Part D claims for 119 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.