DR. MARY ELLEN O'SULLIVAN ED.D.
NPI 1952469884
Psychologist - Clinical in North Chelmsford, MA

Active since December 04, 2006PECOS EnrolledAccepts Medicare Assignment
10 ADAMS ST, SUITE 2, NORTH CHELMSFORD, MA 01863(978) 251-7337(978) 251-8453 Get Directions Write a Review

NPPES record last updated: October 22, 2011. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Dr. Mary Ellen O'sullivan Ed.d. NPPES

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

DR. MARY ELLEN O'SULLIVAN ED.D. (NPI 1952469884) is an individual clinical provider in North Chelmsford, Massachusetts, licensed in Massachusetts (3256) and active in the NPI registry since December 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1982).

NPPES Registry Identity

NPI1952469884
Entity TypeIndividualFemale
Primary Taxonomy103TC0700X
Provider Legal NameDR. MARY ELLEN O'SULLIVANCredential: ED.D.
Location Address10 ADAMS ST, SUITE 2North Chelmsford, MA 01863-1746
Mailing Address10 Adams St, Suite 2North Chelmsford, MA 01863-1746 · (978) 251-7337 · Fax (978) 251-8453
Fax(978) 251-8453
Sole ProprietorYes
Medical School CMSOtherGraduated 1982
Enumeration DateDecember 4, 2006
Last NPPES UpdateOctober 22, 2011
NPI 1952469884 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPsychologist · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code103TC0700X
License Licensed in MA · 3256
Definition

A psychologist who provides continuing and comprehensive mental and behavioral health care for individuals and families; consultation to agencies and communities; training, education and supervision; and research-based practice. It is a specialty in breadth -- one that is broadly inclusive of severe psychopathology -- and marked by comprehensiveness and integration of knowledge and skill from a broad array of disciplines within and outside of psychology proper. The scope of clinical psychology encompasses all ages, multiple diversities and varied systems.

10 ADAMS ST, North Chelmsford, MA 01863

Other Identifiers 1

Medicare ID-Type UnspecifiedWO3374MA · Psychology Provider

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. Mary Ellen O'sullivan Ed.d. 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 ID4385895473
PECOS Enrollment IDI20121120000181
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.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the 2024 & 2026 CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Psychotherapy, 1 hour 90837
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 1-hour session, you'll talk about your feelings, thoughts, and behaviors to help identify and manage mental health issues. This process aids in personal growth, healing, and improved well-being.
89 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01863 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$189.86 typical visit price
range $63.72 – $189.86
Typical copayment $47.46 (range $15.93 – $47.46)
Most-billed visit code 99205
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 15

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

Physician Assistant
10 ADAMS ST
N CHELMSFORD, MA 01863
Physician Assistant
10 ADAMS ST
N CHELMSFORD, MA 01863
Nurse Practitioner
10 ADAMS ST
N CHELMSFORD, MA 01863
Family Medicine
10 ADAMS ST
N CHELMSFORD, MA 01863
Family Medicine
10 ADAMS ST
N CHELMSFORD, MA 01863
Family Medicine
10 ADAMS ST
NORTH CHELMSFORD, MA 01863
Psychologist (Clinical)
10 ADAMS ST, SUITE 2
NORTH CHELMSFORD, MA 01863
Psychologist (Clinical)
10 ADAMS ST, SUITE 2
NORTH CHELMSFORD, MA 01863

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1952469884, enumerated as an "individual" on December 04, 2006.

The provider is located at 10 ADAMS ST SUITE 2 NORTH CHELMSFORD, MA 01863 and the phone number is (978) 251-7337.

Psychologist with taxonomy code 103TC0700X and a focus in Clinical.

The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.