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

Individual provider Sports Medicine (Family Medicine) Physician · NPI 1760483721

David Scott Marr, MD is registered under Family Practice in Portland, Maine. Graduated from University of Massachusetts Medical School in 1997, 29 years ago. Practices with Littleton Hospital Association, a 110-clinician group and accepts Medicare assignment. Licensed in Maine.

Years since qualifying
29
Trained at
University of Massachusetts Medical School
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

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

Specialties & licences

Sports Medicine (Family Medicine) Physician (primary) Taxonomy 207QS0010X · Licence MD15231 (ME)

Record details

NPI number1760483721
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 2, 2005
Last updated in NPPESJune 12, 2017

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL
Graduated 1997 (29 years in practice)
Group practice Littleton Hospital Association — 110 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 patients159
Services billed 1,553 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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. Those with a page here are linked.

Colleagues at Littleton Hospital Association

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 110 clinicians in the practice; 12 are shown here.

Other providers in Portland