Mary C. Gessner-Peterson, DO
NPI 1861662884ActiveIndividual· Emergency Medicine, Emergency Medical Services· Alpine, CA
Emergency Medicine, Emergency Medical Services (DO) in Alpine, California, trained at Philadelphia College of Osteopathic Medicine (class of 2005). Their prescriptions cost Medicare Part D more than their services did: $3,603,897 for 41,966 claims, against $1,976,520 paid for services in 2024. Lilly USA, LLC reported $19.70 in payments in 2024, mostly food and beverage.
Overview
| NPI | 1861662884 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | Yes |
| NPI issued | Mar 5, 2008 |
| Last updated in NPPES | Sep 26, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine, Emergency Medical Services Primary | 207PE0004X | OS014103 | PA |
| Internal Medicine | 207R00000X | 20A1174 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CA); Practitioner - Internal Medicine (UT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 2,256 |
|---|---|
| Services billed | 25,111 across 116 procedure codes |
| Paid by Medicare | $1,976,520 |
Part D prescriptions in 2024
| Prescriptions (claims) | 41,966 · 44,161 30-day fills |
|---|---|
| Patients | 1,221 |
| Total drug cost | $3,603,897 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | Philadelphia College of Osteopathic Medicine |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Internal Medicine |
Medical group
- Mary Gessner-Peterson Medical Group IncAlpine, CA · 4 clinicians
Hospital affiliations
- Grossmont HospitalLa Mesa, CA
- Sharp Chula Vista Medical CenterChula Vista, CA
Other facilities
- Good Samaritan Home Health IncHome health agency · National City, CA
- Health Shield Home Health ServicesHome health agency · San Diego, CA
- Mission Home Health of San Diego LLCHome health agency · San Diego, CA
- Saint Francis Healthcare IncHome health agency · La Mesa, CA
- Vital Care Health SystemsHome health agency · San Diego, CA
- Advantage Health SystemsHospice · San Diego, CA
- Alternative Hospice Care Inc.Hospice · San Marcos, CA
- Apreva HospiceHospice · San Diego, CA
- Comfort and Peace HospiceHospice · San Diego, CA
- Mission Hospice Services of San Diego LLCHospice · San Diego, CA
- Bella Vista Health CenterNursing home · Lemon Grove, CA
- Country Hills Post AcuteNursing home · El Cajon, CA
- San Diego Post-Acute CenterNursing home · El Cajon, CA
- Stillwater Post-AcuteNursing home · El Cajon, CA
- The Shores Post-AcuteNursing home · San Diego, CA
Industry payments (Open Payments)
- 2024$19.70 · 1 payment from 1 company
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $19.70 | 1 |
What the 2024 payments were for
- Food and Beverage$19.70 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records