Tammy Williams, NP-C
Nurse Practitioner, Adult Health (NP-C) with Mos LLC, practicing in Madison, Florida. Their prescriptions cost Medicare Part D more than their services did: $1,140,560 for 11,283 claims, against $98,614 paid for services in 2024. Dexcom, Inc. was the largest of 2 companies reporting payments in 2025, $28.37 in all, mostly food and beverage. Lists Doctors Memorial Hospital Inc and 2 other hospitals as hospital affiliations. A record with the same name and state is on the OIG exclusion list; it carries no NPI, so check it before acting.
Overview
| NPI | 1437282415 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NP-C |
| Sole proprietor | No |
| NPI issued | Mar 13, 2007 |
| Last updated in NPPES | Aug 19, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Adult Health Primary | 363LA2200X | ARNP1396122 | FL |
Exclusion screening
Possible match: verify before acting. The OIG list has a record with the same name in Florida, but that record carries no NPI, so it may be a different person or business.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| Name + state | Tammy T. Williams · Nurse/Nurses Aide | 1128b4 | Mar 20, 2017 | Miami, FL |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | Possible (name) | See above |
| 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 (FL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 327 |
|---|---|
| Services billed | 2,464 across 24 procedure codes |
| Paid by Medicare | $98,614 |
Part D prescriptions in 2024
| Prescriptions (claims) | 11,283 · 28,260 30-day fills |
|---|---|
| Patients | 706 |
| Total drug cost | $1,140,560 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Mos LLCMadison, FL · 2 clinicians
Hospital affiliations
- Doctors Memorial Hospital IncPerry, FL
- Madison County Memorial HospitalMadison, FL
- Sgmc HealthValdosta, GA
Other facilities
- Centerwell Home HealthHome health agency · Tallahassee, FL
Industry payments (Open Payments)
- 2025$28.37 · 2 payments from 2 companies
- 2024$46.94 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Dexcom, Inc. | $16.10 | 1 |
| Phathom Pharmaceuticals, Inc. | $12.27 | 1 |
What the 2025 payments were for
- Food and Beverage$28.37 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other adult health nurse practitioners in Madison
- 1194701862
- 1821538315