Mary Lauren Pfieffer, FNP-BC
NPI 1366701716ActiveIndividual· Nurse Practitioner, Family· Brentwood, TN
Nurse Practitioner, Family (FNP-BC) with Summit Medical Group, PLLC, practicing in Brentwood, Tennessee. Their prescriptions cost Medicare Part D more than their services did: $82,426 for 1,134 claims, against $27,195 paid for services in 2024. Phathom Pharmaceuticals, Inc. reported $4.57 in payments in 2025, mostly food and beverage. Lists Williamson Medical Center as a hospital affiliation.
Overview
| NPI | 1366701716 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | FNP-BC |
| Sole proprietor | No |
| NPI issued | May 4, 2012 |
| Last updated in NPPES | May 23, 2023 |
| Certified by provider | May 23, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | 16396 | TN |
| Nurse Practitioner, Primary Care | 363LP2300X | 16396 | TN |
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 - Nurse Practitioner (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 76 |
|---|---|
| Services billed | 919 across 76 procedure codes |
| Paid by Medicare | $27,195 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,134 · 2,707 30-day fills |
|---|---|
| Patients | 130 |
| Total drug cost | $82,426 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2014 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Summit Medical Group, PLLCKnoxville, TN · 652 clinicians
Hospital affiliation
- Williamson Medical CenterFranklin, TN
Other facilities
- Beacon Home Health BrentwoodHome health agency · Brentwood, TN
Industry payments (Open Payments)
- 2025$4.57 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Phathom Pharmaceuticals, Inc. | $4.57 | 1 |
What the 2025 payments were for
- Food and Beverage$4.57 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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