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

David L Legro, MD

Individual provider Hospitalist Physician · NPI 1861579302

David L Legro, MD practises Internal Medicine in Portsmouth, New Hampshire. Graduated from Columbia University College of Physicians and Surgeons in 1999, 27 years ago. Practices with Mercy Hospital, a 308-clinician group and accepts Medicare assignment. Licensed in Maine and New Hampshire.

Years since qualifying
27
Trained at
Columbia University College of Physicians and Surgeons
Licensed in
ME, NH
In the registry since
2006
Specialties on file
3
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

333 Borthwick Ave
Portsmouth, NH 03801-7128 Not confirmed with CMS for 19 years — call before visiting
Phone: (603) 433-5106
Fax: (603) 433-5180
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 11922 (NH)
Hospitalist Physician Taxonomy 208M00000X · Licence 11922 (NH)
Hospitalist Physician Taxonomy 208M00000X · Licence 016064 (ME)

Record details

NPI number1861579302
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 1, 2006
Last updated in NPPESAugust 3, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesHOSPITALIST
Medical schoolCOLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 1999 (27 years in practice)
Group practice Mercy Hospital — 308 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 patients225
Services billed 548 a service is one billed item, such as a visit, a test or a procedure
Average patient age79

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.

  • Northern Light Mercy Hospital Hospital · Portland, ME
  • Northern Light Home Care & Hospice Hospice · South Portland, ME

Colleagues at Mercy Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 308 clinicians in the practice; 12 are shown here.

Other providers in Portsmouth