Peter Louis Karlsberg, M.D.
NPI 1063560605ActiveIndividual· Specialist· Ventura, CA
Specialist (M.D.) in Ventura, California, trained at University of California, San Francisco School of Medicine (class of 1991). 1,170 Medicare patients in 2024, $394,301 paid; nearly all of their 818 Part D prescriptions were generic (97%). Organon LLC reported $3.99 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1063560605 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jan 8, 2007 |
| Last updated in NPPES | Jul 30, 2022 |
| Certified by provider | Jul 30, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | G80832 | 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 - Dermatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,170 |
|---|---|
| Services billed | 12,937 across 88 procedure codes |
| Paid by Medicare | $394,301 |
Part D prescriptions in 2024
| Prescriptions (claims) | 818 · 946 30-day fills |
|---|---|
| Patients | 355 |
| Total drug cost | $146,433 |
| Generic share | 97% of claims |
Education and affiliations
| Medical school | University of California, San Francisco School of Medicine |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Dermatology |
Medical group
- Peter L. Karlsberg, M.D. A Medical CorporationVentura, CA · 2 clinicians
Hospital affiliation
- Community Memorial Hospital - VenturaVentura, CA
Industry payments (Open Payments)
- 2025$3.99 · 1 payment from 1 company
- 2024$279.68 · 18 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Organon LLC | $3.99 | 1 |
What the 2025 payments were for
- Food and Beverage$3.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 36 Specialist providers in Ventura · All Specialist providers in California