Heather Greenberg Harrison, PA-C
NPI 1710454178ActiveIndividual· Physician Assistant· Summerville, SC
Physician Assistant (PA-C) with Charleston Gastroenterology Specialists, practicing in Summerville, South Carolina. Their prescriptions cost Medicare Part D more than their services did: $329,899 for 1,123 claims, against $63,833 paid for services in 2024. Ardelyx, Inc. was the largest of 13 companies reporting payments in 2025, $1,417 in all, mostly food and beverage. Lists Bon Secours-St Francis Xavier Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1710454178 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Oct 24, 2018 |
| Last updated in NPPES | Jan 31, 2024 |
| Certified by provider | Jan 31, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 5097 | SC |
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 (SC); Practitioner - Physician Assistant (VA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 648 |
|---|---|
| Services billed | 822 across 9 procedure codes |
| Paid by Medicare | $63,833 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,123 · 2,324 30-day fills |
|---|---|
| Patients | 471 |
| Total drug cost | $329,899 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2018 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Charleston Gastroenterology SpecialistsCharleston, SC · 49 clinicians
Hospital affiliations
- Bon Secours-St Francis Xavier HospitalCharleston, SC
- Colleton Medical CenterWalterboro, SC
- Roper HospitalCharleston, SC
- Roper St Francis Hospital-Berkeley IncSummerville, SC
- Trident Medical CenterCharleston, SC
Industry payments (Open Payments)
- 2025$1,417 · 56 payments from 13 companies
- 2024$538.76 · 24 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ardelyx, Inc. | $313.62 | 18 |
| Abbvie Inc. | $257.86 | 11 |
| Madrigal Pharmaceuticals | $189.33 | 3 |
| Phathom Pharmaceuticals, Inc. | $163.75 | 8 |
| Novo Nordisk Inc | $149.86 | 2 |
What the 2025 payments were for
- Food and Beverage$1,417 · 56 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 79 physician assistants in Summerville · All physician assistants in South Carolina