Martha Sierra Diaz, PA-C
NPI 1538481882ActiveIndividual· Physician Assistant· New Haven, CT
Physician Assistant (PA-C) in New Haven, Connecticut, trained at Js Weill Medical College, Cornell University (class of 1995). Their prescriptions cost Medicare Part D more than their services did: $1,584,496 for 813 claims, against $14,630 paid for services in 2024. Pfizer Inc. reported $20.53 in payments in 2024, mostly food and beverage.
Overview
| NPI | 1538481882 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Feb 26, 2010 |
| Last updated in NPPES | Mar 31, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 000762 | CT |
| Physician Assistant | 363A00000X | 5601005665 | MI |
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 - Physician Assistant (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 116 |
|---|---|
| Services billed | 458 across 8 procedure codes |
| Paid by Medicare | $14,630 |
Part D prescriptions in 2024
| Prescriptions (claims) | 813 · 1,054 30-day fills |
|---|---|
| Patients | 227 |
| Total drug cost | $1,584,496 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | Js Weill Medical College, Cornell University |
|---|---|
| Graduation year | 1995 |
| Medicare specialty | Physician Assistant |
Medical group
- Yale UniversityNew Haven, CT · 2,645 clinicians
Hospital affiliations
- Bridgeport HospitalBridgeport, CT
- Greenwich Hospital Association -Greenwich, CT
- Lawrence & Memorial HospitalNew London, CT
- Yale-New Haven HospitalNew Haven, CT
Industry payments (Open Payments)
- 2024$20.53 · 1 payment from 1 company
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $20.53 | 1 |
What the 2024 payments were for
- Food and Beverage$20.53 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 261 physician assistants in New Haven · All physician assistants in Connecticut