Charles W. Phelps, MD
NPI 1407871171ActiveIndividual· Internal Medicine· Annapolis, MD
Internal Medicine (MD) in Annapolis, Maryland, trained at University of Maryland School of Medicine (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $223,258 for 2,469 claims, against $120,615 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 4 companies reporting payments in 2025, $214.93 in all, mostly food and beverage.
Overview
| NPI | 1407871171 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 13, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | D0041816 | MD |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 316 |
|---|---|
| Services billed | 2,893 across 51 procedure codes |
| Paid by Medicare | $120,615 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,469 · 5,364 30-day fills |
|---|---|
| Patients | 225 |
| Total drug cost | $223,258 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | University of Maryland School of Medicine |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Greenfield Associates, M.D., P.A.Annapolis, MD · 3 clinicians
Hospital affiliation
- Luminis Health Anne Arundel Medical Center, IncAnnapolis, MD
Other facilities
- Amedisys Home Health of Maryland LLCHome health agency · Glen Burnie, MD
- Bayada Home Health Care, Inc.Home health agency · Towson, MD
- Centerwell Home HealthHome health agency · Columbia, MD
- Hospice of the Chesapeake, Inc.Hospice · Pasadena, MD
- Ginger CoveNursing home · Annapolis, MD
Industry payments (Open Payments)
- 2025$214.93 · 6 payments from 4 companies
- 2024$115.25 · 5 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $125.01 | 2 |
| Pfizer Inc. | $38.42 | 2 |
| Sumitomo Pharma America, Inc. | $31.43 | 1 |
| Amgen Inc. | $20.07 | 1 |
What the 2025 payments were for
- Food and Beverage$214.93 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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