Gary Altwerger, M.D.
NPI 1407114630ActiveIndividual· Obstetrics & Gynecology, Gynecologic Oncology· Chicago, IL
Obstetrics & Gynecology, Gynecologic Oncology (M.D.) with University of Chicago and 1 other group, practicing in Chicago, Illinois. Their prescriptions cost Medicare Part D more than their services did: $150,859 for 57 claims, against $30,016 paid for services in 2024. Medical Device Business Services, Inc. was the largest of 2 companies reporting payments in 2025, $1,132 in all, mostly travel and lodging. Lists The University of Chicago Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1407114630 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 25, 2012 |
| Last updated in NPPES | Jan 15, 2026 |
| Certified by provider | Jan 15, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology, Gynecologic Oncology Primary | 207VX0201X | 036176993 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Obstetrics/Gynecology (CT); Practitioner - Gynecological Oncology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 88 |
|---|---|
| Services billed | 284 across 36 procedure codes |
| Paid by Medicare | $30,016 |
Part D prescriptions in 2024
| Prescriptions (claims) | 57 · 85 30-day fills |
|---|---|
| Patients | 25 |
| Total drug cost | $150,859 |
| Generic share | 70% of claims |
Education and affiliations
| Graduation year | 2012 |
|---|---|
| Medicare specialty | Gynecological Oncology |
| Secondary specialties | Obstetrics/Gynecology |
| Telehealth | Offers telehealth |
Medical groups
- University of ChicagoChicago, IL · 1,712 clinicians
- Ahp Specialty Care NfpHinsdale, IL · 31 clinicians
Hospital affiliations
- The University of Chicago Medical CenterChicago, IL
- Uchicago Medicine Adventhealth BolingbrookBolingbrook, IL
- Uchicago Medicine Adventhealth HinsdaleHinsdale, IL
- Uchicago Medicine Adventhealth la GrangeLa Grange, IL
- Yale-New Haven HospitalNew Haven, CT
Industry payments (Open Payments)
- 2025$1,132 · 9 payments from 2 companies
- 2024$1,465 · 11 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medical Device Business Services, Inc. | $1,066 | 7 |
| Ethicon US, LLC | $65.76 | 2 |
What the 2025 payments were for
- Travel and Lodging$873.47 · 3 payments
- Food and Beverage$258.26 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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