Monica Maria Diaz, PA-C
NPI 1790488302 · Physician Assistant · Oakland, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Monica Maria Diaz, PA-C is a Physician Assistant provider in Oakland, CA (NPI 1790488302).
Provider details
- NPI number
- 1790488302
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- 62516 (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 tenure28% of score
3 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
76 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 21 | $117 |
| Annual Alcohol Misuse Screening, 5 to 15 MinutesG0442 | 21 | $17 |
| Administration of a Standardized, Evidence-Based Social Determinants of Health Risk Assessment Tool, 5-15 MinutesG0136 | 17 | $18 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 17 | $17 |
Typical Medicare-allowed amounts for these services range $17–$117 (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 · 41 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 135 | 59 |
| Levothyroxine Sodium | 99 | 43 |
| Lisinopril | 95 | 36 |
| Amlodipine Besylate | 67 | 30 |
| Losartan Potassium | 63 | 27 |
| Hydrochlorothiazide | 42 | 20 |
| Apixabanbrand: Eliquis |
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-03-23
- Last updated
- 2023-03-23
- Certified
- 2023-03-23
Frequently asked questions
- What is Monica Maria Diaz's NPI number?
- Monica Maria Diaz's National Provider Identifier (NPI) is 1790488302, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Monica Maria Diaz's specialty?
- Monica Maria Diaz is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Monica Maria Diaz located?
- Monica Maria Diaz's practice location on file with NPPES is 3100 Telegraph Ave, Oakland, CA 94609-3239.
- What is Monica Maria Diaz's phone number?
- The practice phone number listed in the NPPES registry for Monica Maria Diaz is (800) 607-6377.
- Does Monica Maria Diaz accept Medicare?
- Monica Maria Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Monica Maria Diaz's NPI active?
- Yes — Monica Maria Diaz's NPI (1790488302) is active in the NPPES registry as of the last update on 2023-03-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.