Quick answers
- Which hospitals does David J. Ryan work at?
- Medicare's official clinician data lists David J. Ryan at 2 hospitals: Northwestern Medicine Central Dupage Hospital and Northwestern Medicine Delnor Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does David J. Ryan see patients?
- Medicare's clinician data lists 4 practice locations, including Geneva, IL and Lake Forest, IL. Call before your visit to confirm the address.
- What is David J. Ryan's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does David J. Ryan accept Medicare assignment?
- Yes. Medicare's clinician data says David J. Ryan 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 David J. Ryan?
- (630) 208-4060, as listed in official Medicare / NPI Registry data.
- What is David J. Ryan's NPI number?
- 1770718314. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where David J. Ryan works
Medicare's Facility Affiliation Data lists David J. Ryan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
- Northwestern Medicine Delnor Community HospitalGeneva, IL · Acute Care Hospital · CCN 140211
Practice locations
Addresses where David J. Ryan is enrolled with Medicare (CMS data updated 2026-10-02).
- 300 Randall RdGeneva, IL 60134 (630) 208‑4060
- 304 Randall RdGeneva, IL 60134
- 351 Delnor DrGeneva, IL 60134 (630) 923‑9600
- 660 N Westmoreland Rd, 302 Lake Forest ObgynLake Forest, IL 60045 (312) 926‑6146
Group practices
Medicare enrollment lists David J. Ryan as a member of these groups (CMS data updated 2026-10-02).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
- Central Dupage Physician Group1,080 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Geneva
Clinicians with the same Medicare primary specialty in Geneva, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | St. Louis College Of Physicians And Surgeons |
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770718314 |
| 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