Doctor profile · Federal record
Dr. Mark Ratain
Hematology & Oncology Physician (CMS: Hematology/Oncology) · Chicago, IL
- NPI 1255494779
- Accepts Medicare
- MIPS 87.7 / 100 · 2023
- 46 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
5841 S Maryland Ave
Chicago, IL 606371443
(888) 824-0200 - Mailing address
-
150 Harvester Dr, Suite 300
Burr Ridge, IL 605275919
Credentials & registration
- NPI registered
- December 2006 — 20 yrs on file
- Profile last updated
- October 24, 2022
- Year of graduation
- 1980 — 46 yrs since
- Specialty taxonomy
- 207RH0003X — NUCC code
- State license (1)
- Illinois #036066554
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1255494779. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
31
Distinct HCPCS
2
Medicare allowed
$4,792
| 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 | 19 | 19 | $137 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 12 | 12 | $182 |
In context: peer comparison
Among 77 peers in Chicago Hematology & Oncology Physician, average services per provider: 870. This provider delivers 0.0× the peer median.Open Payments
Industry payments received
All-time total
$11,050
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Boehringer Ingelheim Rcv GmbH & Co Kg | 1 | $11,050.00 |
By nature of payment
Frequently asked questions
What is Dr. Mark Ratain's medical specialty?
Dr. Mark Ratain practices Hematology & Oncology Physician in Chicago, IL.
Where does Dr. Mark Ratain practice?
Dr. Mark Ratain practices at 5841 S Maryland Ave, Chicago, IL 606371443. Office phone: 8888240200.
What is Dr. Mark Ratain's NPI?
Dr. Mark Ratain's National Provider Identifier (NPI) is 1255494779, issued by NPPES.
Does Dr. Mark Ratain accept Medicare assignment?
Yes. Dr. Mark Ratain accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Ratain commonly perform?
Top Medicare-reported procedures in 2023: Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.