Quick answers
- Which hospitals does Malissa M. Johnsen work at?
- Medicare's official clinician data lists Malissa M. Johnsen at 2 hospitals: Maine General Medical Center and MaineHealth Maine Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Malissa M. Johnsen see patients?
- Medicare's clinician data lists 4 practice locations, including Waterville, ME, Portland, ME and Augusta, ME. Call before your visit to confirm the address.
- What is Malissa M. Johnsen's specialty?
- Medicare lists Certified Registered Nurse Anesthetist (CRNA) as the primary specialty.
- Does Malissa M. Johnsen accept Medicare assignment?
- Yes. Medicare's clinician data says Malissa M. Johnsen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Malissa M. Johnsen?
- (207) 622-1959, as listed in official Medicare / NPI Registry data.
- What is Malissa M. Johnsen's NPI number?
- 1700220100. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Malissa M. Johnsen works
Medicare's Facility Affiliation Data lists Malissa M. Johnsen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Maine General Medical CenterAugusta, ME · Acute Care Hospital · CCN 200039
- MaineHealth Maine Medical CenterPortland, ME · Acute Care Hospital · CCN 200009
Practice locations
Addresses where Malissa M. Johnsen is enrolled with Medicare (CMS data updated 2026-10-02).
- 149 N StWaterville, ME 04901 (207) 622‑1959
- 22 Bramhall StPortland, ME 04102
- 35 Medical Ctr Pkwy, Suite 201Augusta, ME 04330 (207) 620‑1136
- 84 Campus DrScarborough, ME 04074 (207) 396‑7000
Group practices
Medicare enrollment lists Malissa M. Johnsen as a member of these groups (CMS data updated 2026-10-02).
- MaineHealth2,633 clinicians in the group
- Kennebec Anesthesia Associates PA34 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Maine →
Other nurse anesthetists in Waterville
Clinicians with the same Medicare primary specialty in Waterville, ME — not a recommendation.
Clinician information
| Graduation year | 2020 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1700220100 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians