Doctor profile · Federal record
Dr. Tamer Atassi, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Joliet, IL
- NPI 1548276819
- Accepts Medicare
- 33 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
2121 Oneida St, Suite 302
Joliet, IL 604356544
(630) 685-2877
fax (630) 395-9796 - Mailing address
-
Po Box 433
Lemont, IL 60439
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- October 2, 2012
- Year of graduation
- 1993 — 33 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Illinois #036113533
- Medicaid
- IL #036113533
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1548276819. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,832
Distinct HCPCS
10
Medicare allowed
$236,457
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 548 | 319 | $81 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 240 | 225 | $134 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 148 | 116 | $131 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 144 | 137 | $94 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 115 | 112 | $179 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 103 | 80 | $94 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 98 | 98 | $174 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 90 | 61 | $123 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 83 | 83 | $176 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 40 | 40 | $259 |
In context: peer comparison
Among 2 peers in Joliet Gastroenterology Physician, average services per provider: 125. This provider delivers 15× the peer median.Open Payments
Industry payments received
All-time total
$973
Transactions
29
Manufacturers
12
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 14 | $341.85 | |
| Conmed Corporation | 1 | $134.46 | |
| Boston Scientific Corporation | 2 | $124.36 | |
| Pinnacle Biologics, INC | 1 | $115.81 | |
| Takeda Pharmaceuticals U.S.A., INC. | 2 | $49.34 | |
| Sandoz INC. | 2 | $45.91 | |
| Pfizer INC. | 2 | $42.89 | |
| Madrigal Pharmaceuticals | 1 | $32.93 | |
| Janssen Biotech, INC. | 1 | $26.61 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | 1 | $23.28 | |
| Evoke Pharma, INC. | 1 | $22.45 | |
| Phathom Pharmaceuticals, INC. | 1 | $13.07 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
216
Patients
39
Total drug cost
$60,977
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 55 | 20 | $723 |
| Pantoprazole Sodium | Generic | 42 | 19 | $607 |
| Linzess (Linaclotide) | Brand | 26 | 0 | $23,042 |
| Dicyclomine Hcl | Generic | 16 | 0 | $255 |
| Mesalamine | Generic | 15 | 0 | $11,563 |
| Balsalazide Disodium | Generic | 14 | 0 | $1,661 |
| Budesonide Dr (Budesonide) | Brand | 13 | 0 | $1,615 |
| Trulance (Plecanatide) | Brand | 13 | 0 | $20,956 |
| Cholestyramine (Cholestyramine (With Sugar)) | Brand | 11 | 0 | $442 |
| Famotidine | Generic | 11 | 0 | $113 |
Hospital affiliations
Frequently asked questions
What is Dr. Tamer Atassi's medical specialty?
Dr. Tamer Atassi practices Gastroenterology Physician in Joliet, IL.
Where does Dr. Tamer Atassi practice?
Dr. Tamer Atassi practices at 2121 Oneida St, Joliet, IL 604356544. Office phone: 6306852877.
What is Dr. Tamer Atassi's NPI?
Dr. Tamer Atassi's National Provider Identifier (NPI) is 1548276819, issued by NPPES.
Does Dr. Tamer Atassi accept Medicare assignment?
Yes. Dr. Tamer Atassi accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Tamer Atassi commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.