Doctor profile · Federal record
Dr. William Riles, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Internal Medicine Physician · Gastroenterology Physician · Gastroenterology Physician · Chicago, IL
- NPI 1891705737
- Accepts Medicare
- MIPS 78.2 / 100 · 2023
- 28 yrs in practice
- Licensed in 3 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
1901 W Harrison St
Chicago, IL 606123714
(312) 864-7344
fax (312) 864-9624 - Additional location
-
300 S 8Th St Ste 509E
Murray, KY 420712403
(270) 759-4000
fax (270) 752-2857
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- March 15, 2024
- Year of graduation
- 1998 — 28 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (3)
- Illinois #036-104745 · Kentucky #35093 · South Carolina #29567
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1891705737. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
13
Distinct HCPCS
1
Medicare allowed
$1,817
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 13 | 13 | $140 |
In context: peer comparison
Among 70 peers in Chicago Gastroenterology Physician, average services per provider: 239. This provider delivers 0.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
15
Patients
14
Total drug cost
$261
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Peg-3350 and Electrolytes (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 15 | 14 | $261 |
Hospital affiliations
Frequently asked questions
What is Dr. William Riles's medical specialty?
Dr. William Riles practices Gastroenterology Physician in Chicago, IL.
Where does Dr. William Riles practice?
Dr. William Riles practices at 1901 W Harrison St, Chicago, IL 606123714. Office phone: 3128647344.
What is Dr. William Riles's NPI?
Dr. William Riles's National Provider Identifier (NPI) is 1891705737, issued by NPPES.
Does Dr. William Riles accept Medicare assignment?
Yes. Dr. William Riles accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Riles commonly perform?
Top Medicare-reported procedures in 2023: Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.