Charles W. Phelps, MD

Medicare activity in 2024

Official CMS public-use data for Charles W. Phelps, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Most frequent services

1. Insertion of needle into vein for collection of blood sample (36415)537 services
2. Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional (99211)462 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)455 services
4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)325 services
5. Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)127 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

• High blood pressure75%
• High cholesterol75%
• Arthritis49%
• Chronic kidney disease33%
• Osteoporosis27%
• Ischemic heart disease24%

Hospitals where Charles W. Phelps works

Medicare's Facility Affiliation Data lists Charles W. Phelps at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• Luminis Health Anne Arundel Medical Center, IncAnnapolis, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210023

Practice locations

Addresses where Charles W. Phelps is enrolled with Medicare (CMS data updated October 2, 2026).

• 139 Old Solomons Isl RdAnnapolis, MD 21401 (410) 224‑2222

Group practices

Medicare enrollment lists Charles W. Phelps as a member of this group (CMS data updated October 2, 2026).

• Greenfield Associates, M.D., P.A.3 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Maryland →

Other internal medicine doctors in Annapolis

Clinicians with the same Medicare primary specialty in Annapolis, MD — not a recommendation.

• Priyanka Parajuli, MD
• Chinweoke Nwachukwu, MD
• Jennifer L. Cuhran, MD
• Stephanie R. Martin, MD
• Jason Lee-Llacer, MD
• Kathryn A. Oconnell
• Samah Nassereddine, MD
• Andre S. Colaco, MD

All internal medicine doctors in Annapolis →

Other clinicians in Greenfield Associates, M.D., P.A.

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Erika M. Benns, MD
• Jessica L. Campbell, NP

Clinician information

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
6. Medicare Care Compare — official Medicare tool to look up clinicians