Doctor profile · Federal record
Dr. Themistocles Dassopoulos, MD
Gastroenterology Physician (CMS: Gastroenterology) · Gastroenterology Physician · Dallas, TX
- NPI 1326083148
- Accepts Medicare
- 35 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
3409 Worth Street, Suite 640
Dallas, TX 75246
(469) 800-7180
fax (469) 800-7190
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- September 2, 2016
- Year of graduation
- 1991 — 35 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (2)
- Texas #Q0899 · Missouri #2008001013
- Medicaid
- TX #3445801-01
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1326083148. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
159
Distinct HCPCS
6
Medicare allowed
$13,805
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 43 | 34 | $125 | |
36415 |
Insertion of needle into vein for collection of blood sample | 30 | 21 | $8 | |
99221 |
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 27 | 26 | $82 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 24 | 22 | $144 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 18 | 15 | $45 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 17 | 17 | $101 |
In context: peer comparison
Among 53 peers in this city , average services per provider: 41. This provider delivers 3.9× the peer median.Open Payments
Industry payments received
All-time total
$3,439
Transactions
106
Manufacturers
13
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Merck Sharp & Dohme LLC | 14 | $1,506.37 | |
| ABBVIE INC. | 31 | $650.44 | |
| Takeda Pharmaceuticals U.S.A., Inc. | 16 | $392.20 | |
| Celgene Corporation | 9 | $151.60 | |
| Janssen Biotech, Inc. | 6 | $134.41 | |
| Organon Llc | 11 | $122.08 | |
| Celltrion USA Inc. | 1 | $119.63 | |
| AIMMUNE THERAPEUTICS, INC. | 6 | $102.08 | |
| Lilly USA, LLC | 4 | $89.39 | |
| PFIZER INC. | 3 | $64.84 | |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 3 | $58.71 | |
| Medtronic, Inc. | 1 | $24.90 | |
| Janssen Scientific Affairs, LLC | 1 | $22.56 |
By nature of payment
Hospital affiliations
Frequently asked questions
What is Dr. Themistocles Dassopoulos's medical specialty?
Dr. Themistocles Dassopoulos practices Gastroenterology Physician in Dallas, TX.
Where does Dr. Themistocles Dassopoulos practice?
Dr. Themistocles Dassopoulos practices at 3409 Worth Street, Dallas, TX 75246. Office phone: 4698007180.
What is Dr. Themistocles Dassopoulos's NPI?
Dr. Themistocles Dassopoulos's National Provider Identifier (NPI) is 1326083148, issued by NPPES.
Does Dr. Themistocles Dassopoulos accept Medicare assignment?
Yes. Dr. Themistocles Dassopoulos accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Themistocles Dassopoulos 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); Initial hospital care with straightforward or low level of medical decision making (HCPCS 99221). Source: CMS Medicare Physician & Other Practitioners file.