Crystal Adriana Chavez, PA-C
NPI 1912539271ActiveIndividual· Physician Assistant· Stockton, CA
Physician Assistant (PA-C) with P. Gill Obstetrics and Gynecology Medical Group, Inc., practicing in Stockton, California. Their prescriptions cost Medicare Part D more than their services did: $85,252 for 1,506 claims, against $38,318 paid for services in 2024. Sage Therapeutics, LLC was the largest of 11 companies reporting payments in 2025, $442.09 in all, mostly food and beverage. Lists Doctors Hospital of Manteca and 1 other hospital as hospital affiliations.
Overview
| NPI | 1912539271 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | Yes |
| NPI issued | Feb 5, 2020 |
| Last updated in NPPES | Mar 2, 2026 |
| Certified by provider | Mar 2, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 57917 | 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 - Physician Assistant (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 178 |
|---|---|
| Services billed | 646 across 21 procedure codes |
| Paid by Medicare | $38,318 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,506 · 1,856 30-day fills |
|---|---|
| Patients | 148 |
| Total drug cost | $85,252 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2012 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- P. Gill Obstetrics and Gynecology Medical Group, Inc.Stockton, CA · 13 clinicians
Hospital affiliations
- Doctors Hospital of MantecaManteca, CA
- St Joseph's Medical Center of StocktonStockton, CA
Industry payments (Open Payments)
- 2025$442.09 · 28 payments from 11 companies
- 2024$209.85 · 9 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Sage Therapeutics, LLC | $93.64 | 5 |
| Mayne Pharma Commercial LLC | $88.73 | 10 |
| Supernus Pharmaceuticals, Inc. | $78.54 | 4 |
| Astellas Pharma US Inc | $33.60 | 2 |
| Merck Sharp & Dohme LLC | $25.71 | 1 |
What the 2025 payments were for
- Food and Beverage$442.09 · 28 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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