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

Mark O'Brien

Individual provider Registered Nurse · NPI 1124796545

Mark O'Brien is registered under Certified Registered Nurse Anesthetist (CRNA) in Plymouth, Minnesota. Qualified in 2023, 3 years ago. Practices with Park Nicollet Methodist Hospital, a 112-clinician group and accepts Medicare assignment. Licensed in Minnesota.

Years since qualifying
3
Licensed in
MN
In the registry since
2021
Specialties on file
2
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Practice location Address checks out

11505 39th Ave N
Plymouth, MN 55441-1310
Phone: (612) 751-7531
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Certified Registered Nurse Anesthetist (primary) Taxonomy 367500000X · Licence 238058-2 (MN)
Registered Nurse Taxonomy 163W00000X · Licence 238058-2 (MN)

Record details

NPI number1124796545
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedAugust 31, 2021
Last updated in NPPESDecember 12, 2023
Certification dateDecember 12, 2023

Medicare enrollment

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

Medicare specialtyCERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
Medical schoolOTHER
Graduated 2023 (3 years in practice)
Group practice Park Nicollet Methodist Hospital — 112 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 patients132
Services billed 142 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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 Park Nicollet Methodist Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 112 clinicians in the practice; 12 are shown here.

Other providers in Plymouth