Katherine Mary Mahon, MD
NPI 1770645111ActiveIndividual· Family Medicine· Springfield, PA
Family Medicine (MD) with Clinical Specialty Associates, practicing in Springfield, Pennsylvania. Their prescriptions cost Medicare Part D more than their services did: $108,168 for 1,421 claims, against $19,950 paid for services in 2024. Merck Sharp & Dohme LLC reported $30.17 in payments in 2025, mostly food and beverage. Lists Hospital of Univ of Pennsylvania as a hospital affiliation.
Overview
| NPI | 1770645111 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 14, 2006 |
| Last updated in NPPES | Dec 4, 2025 |
| Certified by provider | Dec 4, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | MD436240 | PA |
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 - Family Practice (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 163 |
|---|---|
| Services billed | 398 across 34 procedure codes |
| Paid by Medicare | $19,950 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,421 · 2,446 30-day fills |
|---|---|
| Patients | 136 |
| Total drug cost | $108,168 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2006 |
|---|---|
| Medicare specialty | Family Practice |
Medical group
- Clinical Specialty AssociatesDoylestown, PA · 171 clinicians
Hospital affiliation
- Hospital of Univ of PennsylvaniaPhiladelphia, PA
Industry payments (Open Payments)
- 2025$30.17 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $30.17 | 1 |
What the 2025 payments were for
- Food and Beverage$30.17 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 57 family medicine physicians in Springfield · All family medicine physicians in Pennsylvania