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

Mrs. Malissa Marie Johnsen, CRNA

Individual provider Certified Registered Nurse Anesthetist · NPI 1700220100

Mrs. Malissa Marie Johnsen, CRNA is registered under Certified Registered Nurse Anesthetist (CRNA) in Portland, Maine. Qualified in 2020, 6 years ago. Practices with Mainehealth, a 2,615-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Maine.

Years since qualifying
6
Licensed in
ME
In the registry since
2013
What do these letters mean?
CRNA — Certified Registered Nurse Anesthetist
An advanced practice nurse who administers anaesthesia.

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Practice location Address checks out

22 Bramhall St
Portland, ME 04102-3175
Phone: (207) 662-0111
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1355 W Main St, Monroe, WA 98272-2022 — (360) 794-4011

Specialties & licences

Certified Registered Nurse Anesthetist (primary) Taxonomy 367500000X · Licence RNA203035 (ME)

Record details

NPI number1700220100
Entity typeIndividual (Type 1)
GenderFemale
Credentials CRNA
Sole proprietorNo
NPI enumeratedApril 29, 2013
Last updated in NPPESSeptember 14, 2020
Certification dateSeptember 14, 2020

Medicare enrollment

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

Medicare specialtyCERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice Mainehealth — 2615 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 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 patients24
Services billed 24 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 Mainehealth

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2615 clinicians in the practice; 12 are shown here.

Other providers in Portland