Kristy Zerfass, P.A.
NPI 1558769935ActiveIndividual· Physician Assistant, Surgical· Danbury, CT
Physician Assistant, Surgical (P.A.) with Orthopaedic and Neurosurgery Specialists, PLLC and 1 other group, practicing in Danbury, Connecticut. 182 Medicare patients in 2024, $16,830 paid; all of their 879 Part D prescriptions were generic. Vertex Pharmaceuticals Incorporated was the largest of 2 companies reporting payments in 2025, $52.16 in all, mostly food and beverage. Lists Middlesex Hospital as a hospital affiliation.
Overview
| NPI | 1558769935 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | P.A. |
| Sole proprietor | No |
| NPI issued | Dec 16, 2014 |
| Last updated in NPPES | Dec 16, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Surgical Primary | 363AS0400X | 3253 | CT |
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 (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 182 |
|---|---|
| Services billed | 1,604 across 33 procedure codes |
| Paid by Medicare | $16,830 |
Part D prescriptions in 2024
| Prescriptions (claims) | 879 · 891 30-day fills |
|---|---|
| Patients | 482 |
| Total drug cost | $5,076 |
| Generic share | 100% of claims |
Education and affiliations
| Graduation year | 2014 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical groups
- Orthopaedic and Neurosurgery Specialists, PLLCHarrison, NY · 259 clinicians
- Mhs Primary Care, Inc.Essex, CT · 180 clinicians
Hospital affiliation
- Middlesex HospitalMiddletown, CT
Industry payments (Open Payments)
- 2025$52.16 · 2 payments from 2 companies
- 2024$132.51 · 6 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Vertex Pharmaceuticals Incorporated | $32.20 | 1 |
| Endo USA, Inc. | $19.96 | 1 |
What the 2025 payments were for
- Food and Beverage$52.16 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other surgical physician assistants in Danbury
- 1003370719
- 1023587094
- 1073097283
- 1124041447
- 1255362703
- 1265628739
- 1336177476
- 1356587729
- 1427479195
- 1437190618
- 1477964344
- 1487614160
All 32 surgical physician assistants in Danbury · All surgical physician assistants in Connecticut