Quick answers
- Which hospitals does Christopher M. Koenig work at?
- Medicare's official clinician data lists Christopher M. Koenig at 2 hospitals: Mercy Health System Corp and UnityPoint Health - Meriter. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Christopher M. Koenig see patients?
- Medicare's clinician data lists 4 practice locations, including Janesville, WI, Madison, WI and Crystal Lake, IL. Call before your visit to confirm the address.
- What is Christopher M. Koenig's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Christopher M. Koenig accept Medicare assignment?
- Yes. Medicare's clinician data says Christopher M. Koenig 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 Christopher M. Koenig?
- (608) 756-6000, as listed in official Medicare / NPI Registry data.
- What is Christopher M. Koenig's NPI number?
- 1104205467. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Christopher M. Koenig works
Medicare's Facility Affiliation Data lists Christopher M. Koenig at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Health System CorpJanesville, WI · Acute Care Hospital · CCN 520066
- UnityPoint Health - MeriterMadison, WI · Acute Care Hospital · CCN 520089
Practice locations
Addresses where Christopher M. Koenig is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Mineral Point AveJanesville, WI 53548 (608) 756‑6000
- 202 S Park StMadison, WI 53715 (608) 417‑6206
- 3400 Deerfield DrJanesville, WI 53546 (608) 314‑3600
- 875 S Route 31Crystal Lake, IL 60014 (779) 220‑5500
Group practices
Medicare enrollment lists Christopher M. Koenig as a member of these groups (CMS data updated 2026-10-02).
- Mercy Health System Corporation753 clinicians in the group
- Emergency Medicine Associates of Madison, SC17 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Janesville
Clinicians with the same Medicare primary specialty in Janesville, WI — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1104205467 |
| 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