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

Catherine Eisner Nielsen, MD

Individual provider Family Medicine Physician · NPI 1588654743

Catherine Eisner Nielsen, MD is registered under Family Practice in Oakland, Maine. Graduated from University of Wisconsin School of Medicine in 1993, 33 years ago. Practices with Mainegeneral Medical Center, a 556-clinician group and accepts Medicare assignment. Licensed in Maine.

Years since qualifying
33
Trained at
University of Wisconsin School of Medicine
Licensed in
ME
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

9 Pleasant St
Oakland, ME 04963-5034 Not confirmed with CMS for 14 years — call before visiting
Phone: (207) 465-2181
Fax: (207) 465-4629
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 014189 (ME)

Record details

NPI number1588654743
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 27, 2005
Last updated in NPPESOctober 16, 2012

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF WISCONSIN SCHOOL OF MEDICINE
Graduated 1993 (33 years in practice)
Group practice Mainegeneral Medical Center — 556 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Mainegeneral Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 556 clinicians in the practice; 12 are shown here.

Other providers in Oakland