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

Comprehensive Outpatient Services Inc

Organization Addiction (Substance Use Disorder) Counselor · NPI 1770541948

Comprehensive Outpatient Services Inc is an Addiction (Substance Use Disorder) Counselor in Chelmsford, Massachusetts. Licensed in Massachusetts. Registered with an NPI since 2006.

Licensed in
MA
In the registry since
2006
Specialties on file
13
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

2 Courthouse Ln Ste 3
Chelmsford, MA 01824-1715
Phone: (978) 275-9444
Fax: (978) 453-9394
Show map & directions

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

Specialties & licences

Mental Health Counselor (primary) Taxonomy 101YM0800X · Licence 4196 (MA)
Addiction (Substance Use Disorder) Counselor Taxonomy 101YA0400X · Licence 4196 (MA)
Professional Counselor Taxonomy 101YP2500X · Licence 4196 (MA)
School Counselor Taxonomy 101YS0200X · Licence 4196 (MA)
Clinical Psychologist Taxonomy 103TC0700X · Licence 4196 (MA)
Counseling Psychologist Taxonomy 103TC1900X · Licence 4196 (MA)
Group Psychotherapy Psychologist Taxonomy 103TP2701X · Licence 4196 (MA)
School Psychologist Taxonomy 103TS0200X · Licence 4196 (MA)
Clinical Social Worker Taxonomy 1041C0700X · Licence 4196 (MA)
Marriage & Family Therapist Taxonomy 106H00000X · Licence 4196 (MA)
Adult Psychiatric/Mental Health Registered Nurse Taxonomy 163WP0809X · Licence 4196 (MA)
Psychiatry Physician Taxonomy 2084P0800X · Licence 4196 (MA)
Child & Adolescent Psychiatry Physician Taxonomy 2084P0804X · Licence 4196 (MA)

Record details

NPI number1770541948
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Bruce Mermelstein — President · (617) 527-4610
NPI enumeratedMay 3, 2006
Last updated in NPPESJune 7, 2013
Mailing address2 Courthouse Ln, Suite 3, Chelmsford, MA 01824-1715

Other providers in Chelmsford