Quick answers
- Does Allan H. Grunberg accept Medicare assignment?
- Yes. Medicare's clinician data says Allan H. Grunberg accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Allan H. Grunberg see?
- In 2024, CMS data shows 406 Original Medicare patients and 426 services for Allan H. Grunberg. This counts Original Medicare only and measures volume, not quality.
- What is Allan H. Grunberg's NPI number?
- 1841217759. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Allan H. Grunberg, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 406 |
|---|---|
| Services billed to Medicare | 426 |
| Different services or procedures | 4 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Anesthesia for other procedure on large bowel using an endoscope (00811)196 services
- Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)88 services
- Anesthesia for exam of colon using an endoscope (00812)76 services
- Anesthesia for procedure on small and large bowel using an endoscope (00813)66 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure64%
- Arthritis45%
- Diabetes21%
- Anxiety20%
- Ischemic heart disease19%
Practice locations
Addresses where Allan H. Grunberg is enrolled with Medicare (CMS data updated October 2, 2026).
- 245 Alvord Park Rd, Bldg BTorrington, CT 06790 (860) 496‑0455
Group practices
Medicare enrollment lists Allan H. Grunberg as a member of this group (CMS data updated October 2, 2026).
- Connecticut Gi PLLC248 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Torrington
Clinicians with the same Medicare primary specialty in Torrington, CT — not a recommendation.
Other clinicians in Connecticut Gi PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York University School Of Medicine |
| Graduation year | 1984 (42 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841217759 |
| 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
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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