Doctor profile · Federal record
Dr. Wallace Duncan, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Lithonia, GA
- NPI 1821153529
- Accepts Medicare
- 34 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
5900 Hillandale Dr, Annex E
Lithonia, GA 300583802
(770) 987-8400
fax (770) 987-8494 - Mailing address
-
Po Box 924583
Norcross, GA 300104583
Credentials & registration
- NPI registered
- December 2006 — 20 yrs on file
- Profile last updated
- October 17, 2011
- Year of graduation
- 1992 — 34 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Georgia #041109
- Medicaid
- GA #00687893G
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1821153529. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
540
Distinct HCPCS
5
Medicare allowed
$42,499
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 200 | 84 | $126 | |
36415 |
Insertion of needle into vein for collection of blood sample | 181 | 80 | $8 | |
99497 |
Advance care planning, first 30 minutes | 58 | 58 | $82 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 55 | 55 | $128 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 46 | 28 | $89 |
In context: peer comparison
Among 2 peers in Lithonia Internal Medicine Physician, average services per provider: 117. This provider delivers 4.6× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
3,737
Patients
1,077
Total drug cost
$45,018
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Amlodipine Besylate | Generic | 419 | 132 | $2,642 |
| Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) | Brand | 376 | 54 | $10,661 |
| Atorvastatin Calcium | Generic | 325 | 102 | $3,710 |
| Hydrochlorothiazide | Generic | 290 | 78 | $1,132 |
| Alprazolam | Generic | 261 | 51 | $2,355 |
| Losartan Potassium | Generic | 260 | 65 | $3,462 |
| Metformin Hcl | Generic | 240 | 71 | $1,684 |
| Simvastatin | Generic | 226 | 65 | $1,569 |
| Omeprazole | Generic | 215 | 60 | $2,974 |
| Azithromycin | Generic | 200 | 122 | $869 |
Frequently asked questions
What is Dr. Wallace Duncan's medical specialty?
Dr. Wallace Duncan practices Internal Medicine Physician in Lithonia, GA.
Where does Dr. Wallace Duncan practice?
Dr. Wallace Duncan practices at 5900 Hillandale Dr, Lithonia, GA 300583802. Office phone: 7709878400.
What is Dr. Wallace Duncan's NPI?
Dr. Wallace Duncan's National Provider Identifier (NPI) is 1821153529, issued by NPPES.
Does Dr. Wallace Duncan accept Medicare assignment?
Yes. Dr. Wallace Duncan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Wallace Duncan commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Insertion of needle into vein for collection of blood sample (HCPCS 36415); Advance care planning (HCPCS 99497). Source: CMS Medicare Physician & Other Practitioners file.