Tammy O'Riley, FNP-C
NPI 1235413436 · Nurse Practitioner · San Diego, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tammy O'Riley, FNP-C is a Nurse Practitioner provider in San Diego, CA (NPI 1235413436).
Provider details
- NPI number
- 1235413436
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- AP0624 (AZ)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
684 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 268 | $163 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 246 | $14 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 132 | $30 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 26 | $113 |
| Hemoglobin A1c Level83036 | 12 | $10 |
Typical Medicare-allowed amounts for these services range $10–$163 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 35 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tirzepatidebrand: Mounjaro | 126 | 35 |
| Pen Needle, Diabeticbrand: Nano 2nd Gen Pen Needle | 109 | 50 |
| Dulaglutidebrand: Trulicity | 86 | 27 |
| Semaglutidebrand: Ozempic | 86 | 27 |
| Empagliflozinbrand: Jardiance | 83 | 31 |
| Metformin Hclbrand: Metformin Hcl Er |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$98 across 3 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
Additional practice locations (1)
- 10815 W Mcdowell Rd Ste 304Avondale, AZ 85392-5016Phone: (602) 494-5040Fax: (602) 494-4020
Registry dates
- Enumerated
- 2011-10-06
- Last updated
- 2020-11-09
- Certified
- 2020-11-09
Frequently asked questions
- What is Tammy O'Riley's NPI number?
- Tammy O'Riley's National Provider Identifier (NPI) is 1235413436, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammy O'Riley's specialty?
- Tammy O'Riley is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Tammy O'Riley located?
- Tammy O'Riley's practice location on file with NPPES is 200 W Arbor Dr, San Diego, CA 92103-9000.
- What is Tammy O'Riley's phone number?
- The practice phone number listed in the NPPES registry for Tammy O'Riley is (800) 926-8273.
- Does Tammy O'Riley accept Medicare?
- Tammy O'Riley is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tammy O'Riley's NPI active?
- Yes — Tammy O'Riley's NPI (1235413436) is active in the NPPES registry as of the last update on 2020-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.