Quick answers
- Which hospitals does Arthur M. Altbuch work at?
- Medicare's official clinician data lists Arthur M. Altbuch at 1 hospital: Mercy Health System Corp. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Arthur M. Altbuch see patients?
- Medicare's clinician data lists 2 practice locations, including Janesville, WI. Call before your visit to confirm the address.
- What is Arthur M. Altbuch's specialty?
- Medicare lists Geriatric Medicine as the primary specialty, and also Addiction Medicine, Family Practice and Sports Medicine.
- Does Arthur M. Altbuch accept Medicare assignment?
- Yes. Medicare's clinician data says Arthur M. Altbuch 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 Arthur M. Altbuch?
- (608) 755-7960, as listed in official Medicare / NPI Registry data.
- What is Arthur M. Altbuch's NPI number?
- 1821021429. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Arthur M. Altbuch works
Medicare's Facility Affiliation Data lists Arthur M. Altbuch 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
Practice locations
Addresses where Arthur M. Altbuch is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Mineral Point AveJanesville, WI 53548
- 849 Kellogg AveJanesville, WI 53546 (608) 755‑7960
Group practices
Medicare enrollment lists Arthur M. Altbuch as a member of this group (CMS data updated 2026-10-02).
- Mercy Health System Corporation753 clinicians in the group
Specialties
- Geriatric Medicineprimary
- Addiction Medicinealso
- Family Practicealso
- Sports Medicinealso
Other geriatricians in Wisconsin
Clinicians with the same Medicare primary specialty in Wisconsin — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albany Medical College Of Union University |
| Graduation year | 1976 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1821021429 |
| 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