EMILY JEANNE MELLEN M.A.
NPI 1376210773
Psychologist in Boston, MA

Active since August 24, 2021PECOS EnrolledAccepts Medicare Assignment
800 WASHINGTON ST, BOSTON, MA 02111(617) 636-7105 Get Directions Write a Review

NPPES record last updated: January 19, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 19, 2026, Apr 9, 2024, Mar 6, 2024 and 1 more (4 updates tracked since 2021).

About Emily Jeanne Mellen M.a. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

EMILY JEANNE MELLEN M.A. (NPI 1376210773) is an individual psychologist in Boston, Massachusetts, licensed in Massachusetts (PSY10001867) and active in the NPI registry since August 2021. She is enrolled in Medicare PECOS and is a graduate of Other (2025).

NPPES Registry Identity

NPI1376210773
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameEMILY JEANNE MELLENCredential: M.A.
Location Address800 WASHINGTON STBoston, MA 02111-1552
Mailing Address800 Washington StBoston, MA 02111-1552 · (908) 448-8583
Sole ProprietorNo
Medical School CMSOtherGraduated 2025
Enumeration DateAugust 24, 2021
Last NPPES UpdateJanuary 19, 20264 updates tracked since enumeration
NPPES CertifiedJanuary 19, 2026
✔ NPI 1376210773 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in MA · PSY10001867
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
800 WASHINGTON ST, Boston, MA 02111

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Emily Jeanne Mellen M.a. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9739669185
PECOS Enrollment IDI20260216002387
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Emily Mellen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Psychiatry
800 WASHINGTON ST, BOX 1013
Boston, MA 02111
  • Reassigned Medicare billing, Massachusetts enrollment
  • 90 clinicians in this Medicare group

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Internal Medicine (Gastroenterology)
800 WASHINGTON ST, BOX 233
BOSTON, MA 02111
Technician/Technologist (Optician)
800 WASHINGTON ST, BOX 450
BOSTON, MA 02111
Plastic Surgery
800 WASHINGTON ST
BOSTON, MA 02111
Internal Medicine
800 WASHINGTON ST
BOSTON, MA 02111
Internal Medicine (Infectious Disease)
800 WASHINGTON ST
BOSTON, MA 02111
Student in an Organized Health Care Education/Training Program
800 WASHINGTON ST
BOSTON, MA 02111
Psychiatry & Neurology (Psychiatry)
800 WASHINGTON ST
BOSTON, MA 02111
Student in an Organized Health Care Education/Training Program
800 WASHINGTON ST
BOSTON, MA 02111

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Emily Mellen's NPI number?

The NPI number for Emily Mellen is 1376210773. It was assigned to this individual provider in the NPPES registry on August 24, 2021.

Where is Emily Mellen located?

Emily Mellen practices at 800 Washington St, Boston, MA 02111. The listed phone number is (617) 636-7105.

What is Emily Mellen's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Emily Mellen enrolled in Medicare?

Yes. Emily Mellen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Emily Mellen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Emily Mellen reassigns Medicare benefits to Pratt Psychiatric Associates, Inc (Boston, MA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Emily Mellen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Emily Mellen accept?

Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Emily Mellen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Emily Mellen was last updated on January 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.