Tammy Harper, NP-C
NPI 1164537023 · Adult Health Nurse Practitioner · Los Angeles, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tammy Harper, NP-C is a Adult Health Nurse Practitioner provider in Los Angeles, CA (NPI 1164537023).
Provider details
- NPI number
- 1164537023
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP-C
- Sex
- Female
- Sole proprietor
- No
- License
- NP10908 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
182 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 158 | $58 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 24 | $86 |
Typical Medicare-allowed amounts for these services range $58–$86 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tacrolimus | 202 | 36 |
| Pantoprazole Sodium | 76 | 16 |
| Prednisone | 61 | 17 |
| Furosemide | 52 | 16 |
| Rifaximinbrand: Xifaxan | 49 | 12 |
| Patiromer Calcium Sorbitexbrand: Veltassa | 46 | — |
| Cyclosporine, Modifiedbrand: Cyclosporine Modified | 43 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$290 across 8 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-20
- Last updated
- 2023-11-27
- Certified
- 2020-09-23
Frequently asked questions
- What is Tammy Harper's NPI number?
- Tammy Harper's National Provider Identifier (NPI) is 1164537023, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammy Harper's specialty?
- Tammy Harper is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Tammy Harper located?
- Tammy Harper's practice location on file with NPPES is 1520 San Pablo St, Los Angeles, CA 90033-5310.
- What is Tammy Harper's phone number?
- The practice phone number listed in the NPPES registry for Tammy Harper is (323) 442-5100.
- Does Tammy Harper accept Medicare?
- Tammy Harper is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tammy Harper's NPI active?
- Yes — Tammy Harper's NPI (1164537023) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.