Doctor profile · Federal record
Dr. Grazyna Siwy, M.D.
Internal Medicine Physician (CMS: General Practice) · Chicago, IL
- NPI 1447498910
- Accepts Medicare
- MIPS 78.2 / 100 · 2023
- 28 yrs in practice
- Female
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
1901 W Harrison St
Chicago, IL 606123714
(312) 864-6000 - Mailing address
-
8644 W Stolting RD
Niles, IL 607141817
Credentials & registration
- NPI registered
- January 2009 — 17 yrs on file
- Profile last updated
- April 30, 2021
- Year of graduation
- 1998 — 28 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Illinois #036122386
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1447498910. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
221
Distinct HCPCS
3
Medicare allowed
$20,984
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 173 | 83 | $108 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 28 | 25 | $72 | |
93793 |
Anticoagulant management of patient taking warfarin | 20 | 16 | $12 |
In context: peer comparison
Among 487 peers in Chicago Internal Medicine Physician, average services per provider: 168. This provider delivers 1.3× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,518
Patients
549
Total drug cost
$24,272
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 245 | 88 | $3,387 |
| Amlodipine Besylate | Generic | 218 | 73 | $2,101 |
| Hydrochlorothiazide | Generic | 165 | 53 | $554 |
| Metformin Hcl | Generic | 114 | 35 | $763 |
| Enalapril Maleate | Generic | 106 | 31 | $2,278 |
| Nifedipine ER (Nifedipine) | Brand | 84 | 33 | $4,301 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 79 | 30 | $2,934 |
| Gabapentin | Generic | 74 | 28 | $2,092 |
| Carvedilol | Generic | 72 | 25 | $734 |
| Losartan Potassium | Generic | 69 | 24 | $998 |
Hospital affiliations
Frequently asked questions
What is Dr. Grazyna Siwy's medical specialty?
Dr. Grazyna Siwy practices Internal Medicine Physician in Chicago, IL.
Where does Dr. Grazyna Siwy practice?
Dr. Grazyna Siwy practices at 1901 W Harrison St, Chicago, IL 606123714. Office phone: 3128646000.
What is Dr. Grazyna Siwy's NPI?
Dr. Grazyna Siwy's National Provider Identifier (NPI) is 1447498910, issued by NPPES.
Does Dr. Grazyna Siwy accept Medicare assignment?
Yes. Dr. Grazyna Siwy accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Grazyna Siwy commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Anticoagulant management of patient taking warfarin (HCPCS 93793). Source: CMS Medicare Physician & Other Practitioners file.