Ann Mathias, D.O.
NPI 1255394185 · Family Medicine Physician · Byron Center, MI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ann Mathias, D.O. is a Family Medicine Physician provider in Byron Center, MI (NPI 1255394185).
Provider details
- NPI number
- 1255394185
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 5101012832 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
40 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 27 | $94 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 13 | $64 |
Typical Medicare-allowed amounts for these services range $64–$94 (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 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 80 | 33 |
| Levothyroxine Sodium | 73 | 22 |
| Lisinopril | 67 | 23 |
| Gabapentin | 64 | 18 |
| Amlodipine Besylate | 28 | 14 |
| Oxycodone Hcl | 26 | — |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-11
- Last updated
- 2012-10-15
Frequently asked questions
- What is Ann Mathias's NPI number?
- Ann Mathias's National Provider Identifier (NPI) is 1255394185, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ann Mathias's specialty?
- Ann Mathias is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ann Mathias located?
- Ann Mathias's practice location on file with NPPES is 7751 Byron Center Ave Sw, Byron Center, MI 49315-8001.
- What is Ann Mathias's phone number?
- The practice phone number listed in the NPPES registry for Ann Mathias is (616) 878-3321.
- Does Ann Mathias accept Medicare?
- Ann Mathias is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ann Mathias's NPI active?
- Yes — Ann Mathias's NPI (1255394185) is active in the NPPES registry as of the last update on 2012-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.