Quick answers
- Does Zachary J. Kerwin accept Medicare assignment?
- Yes. Medicare's clinician data says Zachary J. Kerwin 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 Zachary J. Kerwin see?
- In 2024, CMS data shows 164 Original Medicare patients and 176 services for Zachary J. Kerwin. This counts Original Medicare only and measures volume, not quality.
- What is Zachary J. Kerwin's NPI number?
- 1386619229. 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 Zachary J. Kerwin, 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 | 164 |
|---|---|
| Services billed to Medicare | 176 |
| Different services or procedures | 49 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)17 services
- Anesthesia for other procedure on large bowel using an endoscope (00811)17 services
- Injection of anesthetic agent and/or steroid into arm nerve bundle (brachial plexus) (64415)14 services
- Anesthesia for x-ray or radiation therapy (01922)12 services
- Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)11 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 blood pressure75%
- High cholesterol75%
- Arthritis59%
- Depression34%
- Chronic kidney disease33%
- Diabetes32%
Hospitals where Zachary J. Kerwin works
Medicare's Facility Affiliation Data lists Zachary J. Kerwin 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.
- Borgess Medical CenterKalamazoo, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230117
- 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
Practice locations
Addresses where Zachary J. Kerwin is enrolled with Medicare (CMS data updated October 2, 2026).
- 125 W Walnut St, Bronson Outpatient Surgery CenerKalamazoo, MI 49007 (269) 343‑1381
- 1521 Gull RdKalamazoo, MI 49048 (269) 226‑7000
- 408 Hazen StPaw Paw, MI 49079 (269) 657‑3141
- 900 Peeler StKalamazoo, MI 49008 (269) 345‑8618
Group practices
Medicare enrollment lists Zachary J. Kerwin as a member of this group (CMS data updated October 2, 2026).
- Kalamazoo Anesthesiology P C135 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Kalamazoo
Clinicians with the same Medicare primary specialty in Kalamazoo, MI — not a recommendation.
Other clinicians in Kalamazoo Anesthesiology P C
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Michigan State University College Of Osteopathic Medicine |
| Graduation year | 1999 (27 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1386619229 |
| 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