Quick answers
- Does Allan W. Barbish accept Medicare assignment?
- Yes. Medicare's clinician data says Allan W. Barbish 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 W. Barbish see?
- In 2024, CMS data shows 268 Original Medicare patients and 326 services for Allan W. Barbish. This counts Original Medicare only and measures volume, not quality.
- What is Allan W. Barbish's NPI number?
- 1891743191. 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 W. Barbish, 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 | 268 |
|---|---|
| Services billed to Medicare | 326 |
| Different services or procedures | 24 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Biopsy of large bowel using a flexible endoscope (45380)79 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)65 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)42 services
- Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk (G0121)33 services
- Colorectal cancer screening; colonoscopy on individual at high risk (G0105)28 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 cholesterol72%
- High blood pressure60%
- Arthritis41%
- Anxiety25%
- Diabetes24%
- Depression23%
Hospitals where Allan W. Barbish works
Medicare's Facility Affiliation Data lists Allan W. Barbish at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Bronson Battle Creek HospitalBattle Creek, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230075
- Bronson Lakeview HospitalPaw Paw, MI · Critical Access Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 231332
- Bronson Methodist HospitalKalamazoo, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230017
- Bronson South Haven HospitalSouth Haven, MI · Acute Care Hospital · Emergency services: listed by Medicare · CCN 230085
Practice locations
Addresses where Allan W. Barbish is enrolled with Medicare (CMS data updated October 2, 2026).
- 3304 Cooley CtPortage, MI 49024 (269) 349‑2266
Group practices
Medicare enrollment lists Allan W. Barbish as a member of this group (CMS data updated October 2, 2026).
- Bronson Methodist Hospital729 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Portage
Clinicians with the same Medicare primary specialty in Portage, MI — not a recommendation.
Other clinicians in Bronson Methodist Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Wayne State University School Of Medicine |
| Graduation year | 1986 (40 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891743191 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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