Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mary Ellen R Dreher, APRN, CRNA

Individual provider Certified Registered Nurse Anesthetist · NPI 1851518690

Mary Ellen R Dreher, APRN, CRNA is registered under Certified Registered Nurse Anesthetist (CRNA) in Rochester, Minnesota. Qualified in 2007, 19 years ago. Practices with Olmsted Medical Center, a 325-clinician group and accepts Medicare assignment. Licensed in Minnesota.

Years since qualifying
19
Licensed in
MN
In the registry since
2007
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.
CRNA — Certified Registered Nurse Anesthetist
An advanced practice nurse who administers anaesthesia.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1650 4th St SE
Rochester, MN 55904-4717
Phone: (507) 529-6600
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Certified Registered Nurse Anesthetist (primary) Taxonomy 367500000X · Licence 39 (MN)

Record details

NPI number1851518690
Entity typeIndividual (Type 1)
GenderFemale
Credentials APRN , CRNA
Sole proprietorNo
NPI enumeratedApril 20, 2007
Last updated in NPPESAugust 20, 2024
Certification dateAugust 20, 2024

Medicare enrollment

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

Medicare specialtyCERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
Medical schoolOTHER
Graduated 2007 (19 years in practice)
Group practice Olmsted Medical Center — 325 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients19
Services billed 19 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

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.

Colleagues at Olmsted Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 325 clinicians in the practice; 12 are shown here.

Other providers in Rochester