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Comprehensive Outpatient Services Inc.

Mental Health Counselor in Chelmsford, MA · enumerated 2006 · authorized official Bruce Mermelstein, President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1770541948

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Registry record

Entity type Organization (Type 2)
Legal business name Comprehensive Outpatient Services Inc.
Practice address 2 Courthouse Ln, Suite 3, Chelmsford, MA, 01824
Phone (978) 275-9444
Fax (978) 453-9394
Enumeration date May 3, 2006
Last updated in NPPES Jun 7, 2013

Taxonomy & classification

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

Authorized official

Name Bruce Mermelstein
Title President
Phone (617) 527-4610

Other identifiers

Identifier Type State Issuer
215480000 Other MA MAGELLAN
215483000 Other MA MAGELLAN
1000930 Other MA BEACON
M18559 Other MA BCBS
1300491 Medicaid MA -
701784 Other MA TUFTS
M18561 Other MA BCBS
001262 Other MA VALUE OPTIONS
1307592 Medicaid MA -
7672103 Other MA AETNA
1307614 Medicaid MA -
980524 Other MA NETWORK HEALTH

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What is the NPI number for Comprehensive Outpatient Services Inc.?
The NPI for Comprehensive Outpatient Services Inc. is 1770541948, a Type 2 (organization) record in the CMS NPPES registry.
Who is the authorized official for Comprehensive Outpatient Services Inc.?
NPPES lists Bruce Mermelstein (President) as the authorized official for this organization.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-06-07.