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

Mark Charles O'Brien

Individual provider Certified Registered Nurse Anesthetist · NPI 1174243976

Mark Charles O'Brien is a Certified Registered Nurse Anesthetist (CRNA) in Lewiston, Maine. Qualified in 2025, 1 year ago. Practices with Central Maine Medical Center, a 347-clinician group and accepts Medicare assignment. Licensed in Maine.

Years since qualifying
1
Licensed in
ME
In the registry since
2022
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Practice location Address checks out

300 Main St
Lewiston, ME 04240-7041
Phone: (207) 795-0111
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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 RNA253086 (ME)

Record details

NPI number1174243976
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedAugust 31, 2022
Last updated in NPPESOctober 29, 2025
Certification dateOctober 29, 2025
Mailing address121 Whitney Rd, Gray, ME 04039-7507

Medicare enrollment

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

Medicare specialtyCERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
Medical schoolOTHER
Graduated 2025 (1 years in practice)
Group practice Central Maine Medical Center — 347 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Lewiston