Catherine Loniewski Girdler, D.O.
Emergency Medicine Physician · Rochester, MI
Catherine Loniewski Girdler, D.O. is an emergency medicine physician with a practice address in Rochester, Michigan, and NPI 1275575250, issued on Jun 12, 2006. Check the license (Michigan 5101012990, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Catherine Loniewski Girdler
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 5101012990 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1101 W University Dr, Rochester, MI 48307
- Phone
- (248) 283-1100
- Enumerated
- Jun 12, 2006
- Record last updated
- Jan 31, 2024
- Fax
- (248) 283-1103
- Medicaid ID
- 114262488 MI
- Medicare enrollment
- Enrolled (PECOS I20041202000937); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Osteopathic Medicine, 1996
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,083 in Michigan → Look up another NPI →
Also registered at 1101 W University Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aws Saeed Muhammad Ababneh, MDStudent in an Organized Health Care Education/Training Program1528988318
- Emecheta Ajaero, MDStudent in an Organized Health Care Education/Training Program1003501156
- Abdalrahman Al SlaimiehStudent in an Organized Health Care Education/Training Program1144142670
- Ahmed Al-Nusairi, MDStudent in an Organized Health Care Education/Training Program1053253146
- Hazem Alata, MDStudent in an Organized Health Care Education/Training Program1912840240
- Tamara Altaweel, MDStudent in an Organized Health Care Education/Training Program1760066989
Verify Catherine Loniewski Girdler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 5101012990Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% fewer Medicare Part D claims than the average emergency medicine physician in 2024
219 Medicare Part D claims for 80 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Doxycycline Hyclate35 claims
- Triamcinolone Acetonide16 claims
- Gentamicin Sulfate15 claims
- Mupirocin15 claims
- Levofloxacin13 claims
- Cephalexin11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 79.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $330.40
7 payments; by number, the most common kind was food and beverage; the largest payer was Mimedx Group, Inc. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Catherine Loniewski Girdler among 3,083 emergency medicine physician records in Michigan
Catherine Loniewski Girdler, D.O. is one of 3,083 emergency medicine physician records with a practice address in Michigan. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 1% of them.
- NPI issued2006 · 1% of these records are older, 77% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1996 · median 2013 among the 1,931 with a school on file
- Record last updated2024 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Michigan
There are 3,083 emergency medicine physician records in Michigan.
All 3,083 in Michigan → Every provider in Rochester → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Janice Demaray, D.O.Rochester Hills, MI 483071336183078
- Katia Nakahodo, D.O.Rochester, MI 483071811975097
- Chukwudi Okonmah, M.D.Rochester, MI 483071700890431
- Brandon Smyth, DORochester, MI 483071851973838
- Timothy Throgmorton, DORochester, MI 483071841451010
- Thomas Zguris, M.D.Rochester Hills, MI 483061821322231
- Emre Conklu, D.O.Sterling Heights, MI 483101164630810
- Robert Klever, M.D.Sterling Heights, MI 483101346404415
Common questions
What is Catherine Loniewski Girdler, D.O.'s NPI number?
Catherine Loniewski Girdler, D.O.'s National Provider Identifier (NPI) is 1275575250, issued on Jun 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Catherine Loniewski Girdler, D.O. located?
The NPPES record lists a practice address at 1101 W University Dr, Rochester, MI, 48307. Phone: (248) 283-1100. Providers update this record themselves, so call before visiting.
How can I verify Catherine Loniewski Girdler, D.O.'s license?
NPPES lists Michigan license number 5101012990, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Catherine Loniewski Girdler, D.O. prescribe under Medicare Part D?
In 2024, Catherine Loniewski Girdler, D.O. had 219 Medicare Part D claims for 80 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Catherine Loniewski Girdler, D.O.'s MIPS final score?
The 2023 MIPS final score is 79.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.