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

Marcia Maclean Walsh, NP

Individual provider Acute Care Nurse Practitioner · NPI 1225068299

Marcia Maclean Walsh, NP is a Nurse Practitioner in Chelmsford, Massachusetts. Qualified in 2002, 24 years ago. Practices with Atrius Health Inc, a 1,205-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
24
Licensed in
MA
In the registry since
2006
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

See every abbreviation used in this directory →

Practice location Address checks out

228 Billerica Rd
Chelmsford, MA 01824-3604
Phone: (978) 250-6000
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 20 Research Pl Ste 220, North Chelmsford, MA 01863-2455 — (978) 459-6737

Specialties & licences

Acute Care Nurse Practitioner (primary) Taxonomy 363LA2100X · Licence 198308 (MA)

Record details

NPI number1225068299
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP
Sole proprietorNo
NPI enumeratedJuly 4, 2006
Last updated in NPPESMarch 24, 2021
Certification dateMarch 24, 2021

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2002 (24 years in practice)
Group practice Atrius Health Inc — 1205 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare