Gregory K. Lynch, PA-C
NPI 1790008175ActiveIndividual· Physician Assistant· Corona, CA
Physician Assistant (PA-C) with Mpz Dermatology, practicing in Corona, California. Their prescriptions cost Medicare Part D more than their services did: $293,026 for 343 claims, against $17,362 paid for services in 2024. Sun Pharmaceutical Industries Inc. was the largest of 16 companies reporting payments in 2025, $3,160 in all, mostly food and beverage.
Overview
| NPI | 1790008175 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Mar 12, 2010 |
| Last updated in NPPES | Jun 11, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA20639 | 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 | 110 |
|---|---|
| Services billed | 475 across 22 procedure codes |
| Paid by Medicare | $17,362 |
Part D prescriptions in 2024
| Prescriptions (claims) | 343 · 376 30-day fills |
|---|---|
| Patients | 107 |
| Total drug cost | $293,026 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Mpz DermatologyCorona, CA · 3 clinicians
Industry payments (Open Payments)
- 2025$3,160 · 87 payments from 16 companies
- 2024$1,539 · 69 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Sun Pharmaceutical Industries Inc. | $1,380 | 3 |
| Genzyme Corporation | $342.12 | 12 |
| Novartis Pharmaceuticals Corporation | $279.62 | 11 |
| Leo Pharma Inc. | $276.40 | 14 |
| Abbvie Inc. | $198.36 | 12 |
What the 2025 payments were for
- Food and Beverage$2,032 · 85 payments
- Consulting Fee$1,080 · 1 payment
- Education$47.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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