Doctor profile · Federal record
Dr. Thomas Duncan, MD
Internal Medicine Physician (CMS: Internal Medicine) · Neenah, WI
- NPI 1588641039
- Accepts Medicare
- 51 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
200 Theda Clark Medical Plz Ste 240
Neenah, WI 549562790
(920) 725-2070 - Mailing address
-
Po Box 8003
Appleton, WI 549128003
Credentials & registration
- NPI registered
- December 2005 — 21 yrs on file
- Profile last updated
- November 23, 2011
- Year of graduation
- 1975 — 51 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Wisconsin #22196
- Medicaid
- WI #30252000
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1588641039. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,153
Distinct HCPCS
10
Medicare allowed
$79,600
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
36415 |
Insertion of needle into vein for collection of blood sample | 389 | 181 | $8 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 346 | 188 | $120 | |
80048 |
Blood test, basic group of blood chemicals (calcium, total) | 301 | 170 | $8 | |
85025 |
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 227 | 152 | $8 | |
80061 |
Blood test, lipids (cholesterol and triglycerides) | 194 | 133 | $13 | |
80076 |
Liver function blood test panel | 163 | 129 | $8 | |
85610 |
Blood test, clotting time | 120 | 13 | $4 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 114 | 114 | $122 | |
83036 |
Hemoglobin a1c level | 85 | 54 | $10 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 66 | 56 | $85 |
In context: peer comparison
Among 8 peers in Neenah Internal Medicine Physician, average services per provider: 84. This provider delivers 26× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
3,713
Patients
1,011
Total drug cost
$46,834
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 451 | 119 | $5,674 |
| Omeprazole | Generic | 340 | 88 | $4,419 |
| Lisinopril | Generic | 335 | 92 | $2,728 |
| Amlodipine Besylate | Generic | 323 | 93 | $2,393 |
| Hydrochlorothiazide | Generic | 295 | 88 | $1,205 |
| Levothyroxine Sodium | Generic | 260 | 61 | $4,643 |
| Metoprolol Succinate | Generic | 223 | 58 | $4,621 |
| Simvastatin | Generic | 221 | 62 | $2,582 |
| Losartan Potassium | Generic | 209 | 60 | $3,196 |
| Furosemide | Generic | 202 | 57 | $1,429 |
Hospital affiliations
Frequently asked questions
What is Dr. Thomas Duncan's medical specialty?
Dr. Thomas Duncan practices Internal Medicine Physician in Neenah, WI.
Where does Dr. Thomas Duncan practice?
Dr. Thomas Duncan practices at 200 Theda Clark Medical Plz Ste 240, Neenah, WI 549562790. Office phone: 9207252070.
What is Dr. Thomas Duncan's NPI?
Dr. Thomas Duncan's National Provider Identifier (NPI) is 1588641039, issued by NPPES.
Does Dr. Thomas Duncan accept Medicare assignment?
Yes. Dr. Thomas Duncan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Thomas Duncan commonly perform?
Top Medicare-reported procedures in 2023: Insertion of needle into vein for collection of blood sample (HCPCS 36415); Established patient office or other outpatient visit (HCPCS 99214); Blood test, basic group of blood chemicals (calcium, total) (HCPCS 80048). Source: CMS Medicare Physician & Other Practitioners file.