Michael S. Karls, PAC
NPI 1801804737ActiveIndividual· Physician Assistant· San Francisco, CA
Physician Assistant (PAC) with Csi Medical Group, practicing in San Francisco, California. 170 Medicare patients in 2024, $67,825 paid; nearly all of their 398 Part D prescriptions were generic (91%). Abbvie Inc. was the largest of 18 companies reporting payments in 2025, $4,333 in all, mostly food and beverage.
Overview
| NPI | 1801804737 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PAC |
| Sole proprietor | No |
| NPI issued | Aug 4, 2006 |
| Last updated in NPPES | Jul 25, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA17789 | 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 | 170 |
|---|---|
| Services billed | 1,495 across 40 procedure codes |
| Paid by Medicare | $67,825 |
Part D prescriptions in 2024
| Prescriptions (claims) | 398 · 452 30-day fills |
|---|---|
| Patients | 144 |
| Total drug cost | $82,252 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 1995 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Csi Medical GroupFullerton, CA · 111 clinicians
Industry payments (Open Payments)
- 2025$4,333 · 168 payments from 18 companies
- 2024$5,312 · 179 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $577.98 | 21 |
| Genzyme Corporation | $465.15 | 16 |
| Arcutis Biotherapeutics, Inc. | $449.21 | 25 |
| Janssen Biotech, Inc. | $434.57 | 8 |
| Leo Pharma Inc. | $401.04 | 18 |
What the 2025 payments were for
- Food and Beverage$4,154 · 166 payments
- Education$178.99 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 516 physician assistants in San Francisco · All physician assistants in California