Catherine Loniewski Girdler, D.O.
NPI 1275575250 · Emergency Medicine Physician · Rochester, MI
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine Loniewski Girdler, D.O. is a Emergency Medicine Physician provider in Rochester, MI (NPI 1275575250).
Provider details
- NPI number
- 1275575250
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 5101012990 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
596 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) |
|---|---|---|
| Removal of Skin and Tissue, 20.0 Sq Cm Or Less11042 | 210 | $61 |
| Management of Oxygen Chamber Therapy99183 | 128 | $108 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 103 | $66 |
| Removal of Skin and Tissue, 20.0 Sq Cm Or Less11042 | 51 | $52 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 38 | $98 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 25 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Doxycycline Hyclate | 35 | 23 |
| Triamcinolone Acetonide | 16 | 11 |
| Gentamicin Sulfate | 15 | — |
| Mupirocin | 15 | — |
| Levofloxacin | 13 | — |
| Cephalexin | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$330 across 7 records (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
- 2006-06-12
- Last updated
- 2024-01-31
- Certified
- 2024-01-31
Frequently asked questions
- What is Catherine Loniewski Girdler's NPI number?
- Catherine Loniewski Girdler's National Provider Identifier (NPI) is 1275575250, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Loniewski Girdler's specialty?
- Catherine Loniewski Girdler is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Catherine Loniewski Girdler located?
- Catherine Loniewski Girdler's practice location on file with NPPES is 1101 W University Dr, Rochester, MI 48307-1863.
- What is Catherine Loniewski Girdler's phone number?
- The practice phone number listed in the NPPES registry for Catherine Loniewski Girdler is (248) 283-1100.
- Does Catherine Loniewski Girdler accept Medicare?
- Catherine Loniewski Girdler is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine Loniewski Girdler's NPI active?
- Yes — Catherine Loniewski Girdler's NPI (1275575250) is active in the NPPES registry as of the last update on 2024-01-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.