Michael Fillenworth, PA
NPI 1023111275 · Medical Physician Assistant · Mt Pleasant, MI
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Fillenworth, PA is a Medical Physician Assistant provider in Mt Pleasant, MI (NPI 1023111275).
Provider details
- NPI number
- 1023111275
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Male
- Sole proprietor
- No
- License
- MF003215 (MI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
178 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 66 | $101 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 64 | $11 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 34 | $90 |
| Urinalysis, Manual Test81002 | 14 | $3 |
Typical Medicare-allowed amounts for these services range $3–$101 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Azithromycin | 109 | 80 |
| Methylprednisolone | 94 | 82 |
| Amoxicillin | 38 | 29 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 31 | 28 |
| Fluconazole | 23 | 17 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 23 | 20 |
| Cephalexin | 18 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$15 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-06
- Last updated
- 2007-07-08
Frequently asked questions
- What is Michael Fillenworth's NPI number?
- Michael Fillenworth's National Provider Identifier (NPI) is 1023111275, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Fillenworth's specialty?
- Michael Fillenworth is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Michael Fillenworth located?
- Michael Fillenworth's practice location on file with NPPES is 2591 South Leaton Rd, Mt Pleasant, MI 48858.
- What is Michael Fillenworth's phone number?
- The practice phone number listed in the NPPES registry for Michael Fillenworth is (989) 775-4664.
- Does Michael Fillenworth accept Medicare?
- Michael Fillenworth is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Fillenworth's NPI active?
- Yes — Michael Fillenworth's NPI (1023111275) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.