Quick answers
- Which hospitals does Robert A. Altbaum work at?
- Medicare's official clinician data lists Robert A. Altbaum at 1 hospital: Danbury Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Robert A. Altbaum see patients?
- Medicare's clinician data lists 1 practice location in Norwalk, CT. Call before your visit to confirm the address.
- What is Robert A. Altbaum's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Robert A. Altbaum accept Medicare assignment?
- Yes. Medicare's clinician data says Robert A. Altbaum 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 Robert A. Altbaum's NPI number?
- 1285736124. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Robert A. Altbaum works
Medicare's Facility Affiliation Data lists Robert A. Altbaum at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Danbury HospitalDanbury, CT · Acute Care Hospital · CCN 070033
Practice locations
Addresses where Robert A. Altbaum is enrolled with Medicare (CMS data updated 2026-10-02).
- 120 Connecticut AveNorwalk, CT 06854
Group practices
Medicare enrollment lists Robert A. Altbaum as a member of this group (CMS data updated 2026-10-02).
- Norwalk Community Health Center Inc27 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Norwalk
Clinicians with the same Medicare primary specialty in Norwalk, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 1975 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1285736124 |
| 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