Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Margaret Maria Poznalska, DO

Individual provider Emergency Medicine Physician · NPI 1275834665

Dr. Margaret Maria Poznalska, DO practises Emergency Medicine in Sandusky, Ohio. Graduated from Lake Erie College of Osteopathic Medicine, Erie in 2010, 16 years ago. Practices with Er-Doc Inc, a 12-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Michigan, Mississippi and Ohio.

Years since qualifying
16
Trained at
Lake Erie College of Osteopathic Medicine, Erie
Licensed in
MI, MS, OH
In the registry since
2010
Specialties on file
3
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1111 Hayes Ave
Sandusky, OH 44870
Phone: (419) 557-7400
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1055 Valley Bluff Dr, Perrysburg, OH 43551-2877 — (330) 397-3827

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 34.010428 (OH)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 22816 (MS)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 5101027286 (MI)

Record details

NPI number1275834665
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorYes
NPI enumeratedNovember 16, 2010
Last updated in NPPESJune 9, 2026
Certification dateJune 9, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolLAKE ERIE COLLEGE OF OSTEOPATHIC MEDICINE, ERIE
Graduated 2010 (16 years in practice)
Group practice Er-Doc Inc — 12 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients345
Services billed 465 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Er-Doc Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Sandusky