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

Individual provider Certified Registered Nurse Anesthetist · NPI 1770534448

Anne M Karczewski, CRNA is registered under Certified Registered Nurse Anesthetist (CRNA) in Portland, Maine. Qualified in 2004, 22 years ago. Practices with Spectrum Healthcare Partners PA, a 298-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Maine.

Years since qualifying
22
Licensed in
ME
In the registry since
2006
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

33 Sewall St
Portland, ME 04102-2603
Phone: (207) 828-2100
Fax: (207) 553-7166
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 93 Campus Ave, Lewiston, ME 04240 — (207) 777-8442
  • 300 Main St, Lewiston, ME 04240-7027 — (207) 795-0111
  • 300 Main St, Lewiston, ME 04240-7027 — (207) 795-0111

Specialties & licences

Certified Registered Nurse Anesthetist (primary) Taxonomy 367500000X · Licence RNA83025 (ME)

Record details

NPI number1770534448
Entity typeIndividual (Type 1)
GenderFemale
Credentials CRNA
Sole proprietorNo
NPI enumeratedMay 15, 2006
Last updated in NPPESAugust 10, 2020
Certification dateAugust 10, 2020

Medicare enrollment

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

Medicare specialtyCERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
Medical schoolOTHER
Graduated 2004 (22 years in practice)
Group practice Spectrum Healthcare Partners Pa — 298 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 patients27
Services billed 27 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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.

Colleagues at Spectrum Healthcare Partners PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 298 clinicians in the practice; 12 are shown here.

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