Charles Duncan, DO
NPI 1033413547 · Internal Medicine Physician · Dayton, OH
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Duncan, DO is a Internal Medicine Physician provider in Dayton, OH (NPI 1033413547).
Provider details
- NPI number
- 1033413547
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- Yes
- License
- 58.003696 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
15 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
507 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 378 | $74 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 51 | $163 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 42 | $108 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 36 | $76 |
Typical Medicare-allowed amounts for these services range $74–$163 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 22 | 22 |
| Amiodarone Hcl | 19 | — |
| Atorvastatin Calcium | 18 | — |
| Doxycycline Hyclate | 18 | 17 |
| Metoprolol Succinate | 15 | — |
| Pantoprazole Sodium | 15 | 12 |
| Furosemide | 14 | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-12-28
- Last updated
- 2021-03-30
- Certified
- 2021-03-30
Frequently asked questions
- What is Charles Duncan's NPI number?
- Charles Duncan's National Provider Identifier (NPI) is 1033413547, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Duncan's specialty?
- Charles Duncan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Duncan located?
- Charles Duncan's practice location on file with NPPES is 405 W Grand Ave, Dayton, OH 45405-4720.
- What is Charles Duncan's phone number?
- The practice phone number listed in the NPPES registry for Charles Duncan is (937) 723-3248.
- Does Charles Duncan accept Medicare?
- Charles Duncan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Duncan's NPI active?
- Yes — Charles Duncan's NPI (1033413547) is active in the NPPES registry as of the last update on 2021-03-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.