A fast, free, no-login way to look up any U.S. healthcare provider in the federal NPPES registry.

Lookups

NPI Lookup
NPI Registry
By Specialty
By State

Resources

Guides
For Providers / API
Data Sources
About

Legal

Privacy
Terms
Correct a record

Data is sourced from the public NPPES (National Plan and Provider Enumeration System) registry published by CMS. NPI Central is not affiliated with, or endorsed by, CMSor any healthcare provider. Information is provided “as is” for general reference and is not medical advice.

FCRA notice: NPI Central is not a consumer reporting agency. This information may not be used to determine eligibility for employment, credentialing, insurance, or any other purpose covered by the Fair Credit Reporting Act.

© 2026 NPI Central. All rights reserved.

Gary Altwerger, M.D. — NPI 1407114630, Chicago, IL | NPI Central

Home/
NPI Lookup/
IL/
NPI 1407114630

IndividualActive

Gary Altwerger, M.D.

NPI 1407114630 · Gynecologic Oncology Physician · Chicago, IL

Provider details

NPI number: 1407114630
Entity type: Individual
Primary specialty: Gynecologic Oncology PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Male
Sole proprietor: Yes
License: 036176993 (IL)

Specialties & taxonomies

Gynecologic Oncology PhysicianPrimary207VX0201XLicense 036176993 (IL)
Allopathic & Osteopathic Physicians

Practice location

5841 S Maryland Ave

Chicago, IL 60637-1443

Phone: (888) 824-0200

Approximate (ZIP-level) locationGet directions

More IL providers

Mailing address

150 Harvester Dr Ste 300

Burr Ridge, IL 60527-5965

Additional practice locations (2)

333 Cedar Street
Fmb 328
New Haven, CT 06510-3220
Phone: (203) 785-7385
Fax: (203) 785-7134
880 W. Central Rd.
Suite 5000
Arlington Heights, IL 60005-2355
Phone: (847) 618-3800
Fax: (847) 618-3809

Registry dates

Enumerated: 2012-04-25
Last updated: 2026-01-15
Certified: 2026-01-15

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.