Quick answers
- Does Marta L. Metz accept Medicare assignment?
- Yes. Medicare's clinician data says Marta L. Metz 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 Marta L. Metz see?
- In 2024, CMS data shows 97 Original Medicare patients and 205 services for Marta L. Metz. This counts Original Medicare only and measures volume, not quality.
- What is Marta L. Metz's NPI number?
- 1588893242. 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 Marta L. Metz, 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 | 97 |
|---|---|
| Services billed to Medicare | 205 |
| Different services or procedures | 10 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)97 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)29 services
- Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)25 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)15 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)14 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 cholesterol72%
- Anxiety54%
- Chronic kidney disease51%
- Depression49%
- Arthritis48%
Hospitals where Marta L. Metz works
Medicare's Facility Affiliation Data lists Marta L. Metz 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.
- Mercy Health Saint Mary'sGrand Rapids, MI · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 230059
Practice locations
Addresses where Marta L. Metz is enrolled with Medicare (CMS data updated October 2, 2026).
- 10047 Crossroad Ct SECaledonia, MI 49316 (616) 685‑8850
- 200 Jefferson Ave SEGrand Rapids, MI 49503 (616) 685‑5000
- 220 Cherry St SEGrand Rapids, MI 49503 (616) 685‑5050
- 250 Cherry St SEGrand Rapids, MI 49503 (616) 685‑5600
Group practices
Medicare enrollment lists Marta L. Metz as a member of this group (CMS data updated October 2, 2026).
- Advantage Health/Saint Mary's Medical Group505 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Caledonia
Clinicians with the same Medicare primary specialty in Caledonia, MI — not a recommendation.
Other clinicians in Advantage Health/Saint Mary's Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2014 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588893242 |
| 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