Doctor profile · Federal record
Dr. Gary Altwerger, M.D.
Gynecologic Oncology Physician (CMS: Gynecological Oncology) · Chicago, IL
- NPI 1407114630
- Accepts Medicare
- MIPS 71.7 / 100 · 2023
- 14 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
5841 S Maryland Ave
Chicago, IL 606371443
(888) 824-0200 - Additional location
-
880 W. Central RD., Suite 5000
Arlington Heights, IL 600052355
(847) 618-3800
fax (847) 618-3809 - Additional location
-
333 Cedar Street, Fmb 328
New Haven, CT 065103220
(203) 785-7385
fax (203) 785-7134 - Mailing address
-
150 Harvester Dr Ste 300
Burr Ridge, IL 605275965
Credentials & registration
- NPI registered
- April 2012 — 14 yrs on file
- Profile last updated
- January 15, 2026
- Year of graduation
- 2012 — 14 yrs since
- Specialty taxonomy
- 207VX0201X — NUCC code
- State license (1)
- Illinois #036176993
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1407114630. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
98
Distinct HCPCS
3
Medicare allowed
$7,203
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 37 | 29 | $70 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 36 | 28 | $103 | |
99441 |
Telephone medical discussion with physician, 5-10 minutes | 25 | 16 | $37 |
In context: peer comparison
Among 9 peers in this city , average services per provider: 44. This provider delivers 2.2× the peer median.Open Payments
Industry payments received
All-time total
$1,465
Transactions
11
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| INTUITIVE SURGICAL, INC. | 10 | $1,329.07 | |
| ABBVIE INC. | 1 | $135.56 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
18
Patients
12
Total drug cost
$453
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prochlorperazine Maleate | Generic | 18 | 12 | $453 |
Frequently asked questions
What is Dr. Gary Altwerger's medical specialty?
Dr. Gary Altwerger practices Gynecologic Oncology Physician in Chicago, IL.
Where does Dr. Gary Altwerger practice?
Dr. Gary Altwerger practices at 5841 S Maryland Ave, Chicago, IL 606371443. Office phone: 8888240200.
What is Dr. Gary Altwerger's NPI?
Dr. Gary Altwerger's National Provider Identifier (NPI) is 1407114630, issued by NPPES.
Does Dr. Gary Altwerger accept Medicare assignment?
Yes. Dr. Gary Altwerger accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gary Altwerger commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Telephone medical discussion with physician (HCPCS 99441). Source: CMS Medicare Physician & Other Practitioners file.