Parker Andrew Duncan Diaz, MD, MPH, FAAFP
NPI 1033434923ActiveIndividual· Family Medicine, Addiction Medicine· Santa Rosa, CA
Family Medicine, Addiction Medicine (MD, MPH, FAAFP) in Santa Rosa, California, trained at University of California, Irvine, California College of Medicine (class of 2010). Their prescriptions cost Medicare Part D more than their services did: $168,506 for 1,485 claims, against $113.04 paid for services in 2024.
Overview
| NPI | 1033434923 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, MPH, FAAFP |
| Sole proprietor | No |
| NPI issued | Apr 2, 2010 |
| Last updated in NPPES | Oct 18, 2023 |
| Certified by provider | Sep 21, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine, Addiction Medicine Primary | 207QA0401X | A118268 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Family Practice (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 15 |
|---|---|
| Services billed | 15 across 2 procedure codes |
| Paid by Medicare | $113.04 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,485 · 2,929 30-day fills |
|---|---|
| Patients | 105 |
| Total drug cost | $168,506 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | University of California, Irvine, California College of Medicine |
|---|---|
| Graduation year | 2010 |
| Medicare specialty | Family Practice |
Medical group
- Santa Rosa Community Health CentersSanta Rosa, CA · 63 clinicians
Hospital affiliations
- Providence Santa Rosa Memorial HospitalSanta Rosa, CA
- Sutter Santa Rosa Regional HospitalSanta Rosa, CA
Other facilities
- Gateway Home Health Corp.Home health agency · San Ramon, CA
- Sutter Care at HomeHome health agency · Santa Rosa, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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