Quick answers
- Does Randall S. Muir accept Medicare assignment?
- Yes. Medicare's clinician data says Randall S. Muir 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 Randall S. Muir see?
- In 2024, CMS data shows 380 Original Medicare patients and 957 services for Randall S. Muir. This counts Original Medicare only and measures volume, not quality.
- What is Randall S. Muir's NPI number?
- 1942620521. 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 Randall S. Muir, 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 | 380 |
|---|---|
| Services billed to Medicare | 957 |
| Different services or procedures | 16 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Dialysis services, 4 or more physician visits per month (20 years or older) (90960)316 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)252 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)107 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)83 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)44 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%
- Chronic kidney disease75%
- Heart failure61%
- Diabetes60%
- Arthritis45%
Hospitals where Randall S. Muir works
Medicare's Facility Affiliation Data lists Randall S. Muir 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.
- Corewell Health Ludington HospitalLudington, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230110
- Mercy Health Lakeshore CampusShelby, MI · Critical Access Hospital · Emergency services: listed by Medicare · CCN 231320
- Spectrum HealthGrand Rapids, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230038
- Trinity Health Grand Haven HospitalGrand Haven, MI · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 230174
- Trinity Health Muskegon HospitalMuskegon, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230066
Practice locations
Addresses where Randall S. Muir is enrolled with Medicare (CMS data updated October 2, 2026).
- 1250 Mercy Dr, Suite 101Muskegon, MI 49444 (231) 733‑1912
Group practices
Medicare enrollment lists Randall S. Muir as a member of this group (CMS data updated October 2, 2026).
- West Michigan Nephrology PLLC8 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Muskegon
Clinicians with the same Medicare primary specialty in Muskegon, MI — not a recommendation.
Other clinicians in West Michigan Nephrology PLLC
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 | 2014 (12 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1942620521 |
| 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