Doctor profile · Federal record
Dr. Mark Duncan, M.D.
Surgery Physician (CMS: General Surgery) · Baltimore, MD
- NPI 1225079593
- MIPS 74.4 / 100 · 2023
- 39 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
4940 Eastern Ave
Baltimore, MD 212242735
(410) 550-0400 - Mailing address
-
Po Box 64563
Baltimore, MD 212644563
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- February 6, 2013
- Year of graduation
- 1987 — 39 yrs since
- Specialty taxonomy
- 208600000X — NUCC code
- State license (1)
- Maryland #D51208
- Medicaid
- MD #530900000
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1225079593. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
147
Distinct HCPCS
7
Medicare allowed
$28,377
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 29 | 26 | $70 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 28 | 22 | $100 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 25 | 25 | $142 | |
47562 |
Removal of gallbladder using an endoscope | 19 | 19 | $708 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 18 | 17 | $152 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 15 | 15 | $88 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 13 | 13 | $192 |
In context: peer comparison
Among 61 peers in Baltimore Surgery Physician, average services per provider: 57. This provider delivers 2.6× the peer median.Frequently asked questions
What is Dr. Mark Duncan's medical specialty?
Dr. Mark Duncan practices Surgery Physician in Baltimore, MD.
Where does Dr. Mark Duncan practice?
Dr. Mark Duncan practices at 4940 Eastern Ave, Baltimore, MD 212242735. Office phone: 4105500400.
What is Dr. Mark Duncan's NPI?
Dr. Mark Duncan's National Provider Identifier (NPI) is 1225079593, issued by NPPES.
Does Dr. Mark Duncan accept Medicare assignment?
Dr. Mark Duncan does not accept Medicare assignment for all services. Patients may be billed amounts beyond Medicare-allowed charges.
What procedures does Dr. Mark Duncan commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99204). Source: CMS Medicare Physician & Other Practitioners file.