Quick answers
- Does Michael T. Fillenworth accept Medicare assignment?
- Yes. Medicare's clinician data says Michael T. Fillenworth 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 Michael T. Fillenworth see?
- In 2024, CMS data shows 92 Original Medicare patients and 329 services for Michael T. Fillenworth. This counts Original Medicare only and measures volume, not quality.
- What is Michael T. Fillenworth's NPI number?
- 1023111275. 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 Michael T. Fillenworth, 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 | 92 |
|---|---|
| Services billed to Medicare | 329 |
| Different services or procedures | 13 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)66 services
- Injection of drug or substance under skin or into muscle (96372)64 services
- Injection, dexamethasone sodium phosphate, 1 mg (J1100)54 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)34 services
- Injection, ceftriaxone sodium, per 250 mg (J0696)30 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 cholesterol67%
- High blood pressure61%
- Arthritis42%
- Diabetes25%
- Anxiety23%
- Depression20%
Practice locations
Addresses where Michael T. Fillenworth is enrolled with Medicare (CMS data updated October 2, 2026).
- 4950 E Bluegrass RdMt Pleasant, MI 48858 (989) 317‑0565
Group practices
Medicare enrollment lists Michael T. Fillenworth as a member of this group (CMS data updated October 2, 2026).
- Isabella Urgent Care PLLC4 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Mt Pleasant
Clinicians with the same Medicare primary specialty in Mt Pleasant, MI — not a recommendation.
Other clinicians in Isabella Urgent Care PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1023111275 |
| 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