Mr. Dennis Jay Eigen, LMHC, LADC

Mr. Dennis Jay Eigen is a Addiction (Substance Use Disorder) Counselor provider (Counselor) practicing in Gloucester, MA, registered in the NPPES registry with NPI 1770665770 since 2006.

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1770665770
Entity type	Individual (Type 1)
Name	Mr. Dennis Jay Eigen
Credential	LMHC, LADC
Sex	Male
Practice address	Gloucester, MA, 01930
Phone	9782984001
Fax	9784916573
Enumeration date	2006-10-19
Last updated in NPPES	2025-09-11

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
101YA0400X	Addiction (Substance Use Disorder) Counselor	Primary	858	MA
101YM0800X	Mental Health Counselor	Secondary	408	MA

Copy-ready billing details

Provider: Dennis Eigen, LMHC, LADC
NPI: 1770665770
Taxonomy: 101YA0400X (Addiction (Substance Use Disorder) Counselor)
Address: Gloucester, MA, 01930

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1730146697	Brian Orr	Individual	Pediatrics Physician	Gloucester, MA
1891752549	Thomas Carbone	Individual	Pediatrics Physician	Gloucester, MA
1235196759	Emily Reulet	Individual	Pediatric Nurse Practitioner	Gloucester, MA
1164489514	Jeffrey Stockman	Individual	Pediatrics Physician	Gloucester, MA
1558308205	Neil Kobrosky	Individual	Endocrinology, Diabetes & Metabolism Physician	Gloucester, MA
1457390692	Michael Arsenian	Individual	Cardiovascular Disease Physician	Gloucester, MA
1255374518	Zaven Jouhourian	Individual	Internal Medicine Physician	Gloucester, MA
1386673184	Victor Carabba	Individual	Internal Medicine Physician	Gloucester, MA

Verify this record

Cross-check NPI 1770665770 against the authoritative CMS record: view Mr. Dennis Jay Eigen on the official NPPES registry .

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. Read the full guide or validate an NPI number.

Frequently asked questions

What specialty is Dennis Eigen?

Dennis Eigen is registered in NPPES with the primary taxonomy of Addiction (Substance Use Disorder) Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2025-09-11.