Quick answers
- Which hospitals does Gregg A. Cognac work at?
- Medicare's official clinician data lists Gregg A. Cognac at 1 hospital: Northwestern Medicine McHenry. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregg A. Cognac see patients?
- Medicare's clinician data lists 2 practice locations, including Huntley, IL and Moline, IL. Call before your visit to confirm the address.
- What is Gregg A. Cognac's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Gregg A. Cognac accept Medicare assignment?
- Yes. Medicare's clinician data says Gregg A. Cognac accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Gregg A. Cognac?
- (312) 695-0870, as listed in official Medicare / NPI Registry data.
- What is Gregg A. Cognac's NPI number?
- 1467409508. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregg A. Cognac works
Medicare's Facility Affiliation Data lists Gregg A. Cognac at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · CCN 140116
Practice locations
Addresses where Gregg A. Cognac is enrolled with Medicare (CMS data updated 2026-10-02).
- 10400 Haligus RdHuntley, IL 60142
- 515 Valley View Dr, Suite 201Moline, IL 61265 (312) 695‑0870
Group practices
Medicare enrollment lists Gregg A. Cognac as a member of this group (CMS data updated 2026-10-02).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Huntley
Clinicians with the same Medicare primary specialty in Huntley, IL — not a recommendation.
Clinician information
| Graduation year | 2017 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1467409508 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians