Doctor profile · Federal record
Dr. Gary Allen, M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (CMS: Thoracic Surgery) · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Littleton, CO
- NPI 1154327872
- Accepts Medicare
- 35 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
7780 S Broadway Ste 170
Littleton, CO 801222633
(303) 269-2920
fax (303) 269-2921 - Additional location
-
1222 S Orange Ave Fl 3
Orlando, FL 328061215
(321) 841-3356
fax (321) 841-7799 - Additional location
-
3310 Waterman Way
Tavares, FL 327785250
(352) 343-1216
fax (352) 343-1582
Credentials & registration
- NPI registered
- June 2005 — 21 yrs on file
- Profile last updated
- December 10, 2025
- Year of graduation
- 1991 — 35 yrs since
- Specialty taxonomy
- 208G00000X — NUCC code
- State licenses (2)
- Florida #ME80476 · Colorado #DR.0073193
- Medicaid
- FL #258936200
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1154327872. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
156
Distinct HCPCS
7
Medicare allowed
$62,134
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 45 | 23 | $50 | |
33533 |
Coronary artery bypass using artery graft, 1 graft | 28 | 28 | $1,728 | |
33508 |
Harvest of vein using an endoscope | 26 | 26 | $16 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 18 | 18 | $126 | |
33518 |
Coronary artery bypass using vein or artery graft, 2 grafts | 14 | 14 | $408 | |
99221 |
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 14 | 12 | $85 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 11 | 11 | $175 |
In context: peer comparison
Among 1 peers in Littleton Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician, average services per provider: 22. This provider delivers 7.1× the peer median.Open Payments
Industry payments received
All-time total
$7,320
Transactions
42
Manufacturers
9
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Intuitive Surgical, INC. | 20 | $6,127.32 | |
| Artivion, INC. | 7 | $464.17 | |
| Abiomed | 6 | $360.29 | |
| Edwards Lifesciences Corporation | 2 | $123.81 | |
| Getinge USA Sales, LLC | 2 | $95.97 | |
| Baxter Healthcare | 1 | $52.60 | |
| Pacira Pharmaceuticals Incorporated | 2 | $40.09 | |
| AngioDynamics, INC. | 1 | $32.12 | |
| Atricure, INC. | 1 | $24.08 |
By nature of payment
Frequently asked questions
What is Dr. Gary Allen's medical specialty?
Dr. Gary Allen practices Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Littleton, CO.
Where does Dr. Gary Allen practice?
Dr. Gary Allen practices at 7780 S Broadway Ste 170, Littleton, CO 801222633. Office phone: 3032692920.
What is Dr. Gary Allen's NPI?
Dr. Gary Allen's National Provider Identifier (NPI) is 1154327872, issued by NPPES.
Does Dr. Gary Allen accept Medicare assignment?
Yes. Dr. Gary Allen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gary Allen commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with straightforward or low level of medical decision making (HCPCS 99231); Coronary artery bypass using artery graft, 1 graft (HCPCS 33533); Harvest of vein using an endoscope (HCPCS 33508). Source: CMS Medicare Physician & Other Practitioners file.