Doctor profile · Federal record
Dr. Marc Demyun, MD
Internal Medicine Physician (CMS: General Practice) · Family Medicine Physician · Internal Medicine Physician · Greenville, TX
- NPI 1952366684
- Accepts Medicare
- 29 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
4001 Ridgecrest RD Ste A
Greenville, TX 754026143
(903) 453-2850
fax (903) 453-2859 - Additional location
-
2810 E Trinity Mills RD Ste 130
Carrollton, TX 750062339
(972) 417-1936 - Additional location
-
4215 Joe Ramsey Blvd E
Greenville, TX 754017852
(903) 408-5000 - Mailing address
-
2810 E Trinity Mills RD Ste 130
Carrollton, TX 750062339
Credentials & registration
- NPI registered
- April 2006 — 20 yrs on file
- Profile last updated
- September 8, 2025
- Year of graduation
- 1997 — 29 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State licenses (2)
- Texas #P8236 · Mississippi #17980
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1952366684. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
100
Distinct HCPCS
4
Medicare allowed
$11,712
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 31 | 18 | $114 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 28 | 17 | $76 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 27 | 27 | $167 | |
99239 |
Hospital discharge day management, more than 30 minutes | 14 | 14 | $110 |
In context: peer comparison
Among 6 peers in this city , average services per provider: 135. This provider delivers 0.7× the peer median.Open Payments
Industry payments received
All-time total
$157
Transactions
7
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| PFIZER INC. | 4 | $97.26 | |
| Medtronic, Inc. | 1 | $21.72 | |
| E.R. Squibb & Sons, L.L.C. | 1 | $19.92 | |
| Novartis Pharmaceuticals Corporation | 1 | $17.63 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
11
Patients
0
Total drug cost
$64
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Finasteride | Generic | 11 | 0 | $64 |
Hospital affiliations
Frequently asked questions
What is Dr. Marc Demyun's medical specialty?
Dr. Marc Demyun practices Internal Medicine Physician in Greenville, TX.
Where does Dr. Marc Demyun practice?
Dr. Marc Demyun practices at 4001 Ridgecrest RD Ste A, Greenville, TX 754026143. Office phone: 9034532850.
What is Dr. Marc Demyun's NPI?
Dr. Marc Demyun's National Provider Identifier (NPI) is 1952366684, issued by NPPES.
Does Dr. Marc Demyun accept Medicare assignment?
Yes. Dr. Marc Demyun accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Marc Demyun commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.