Active NPI
Dennis Jay Eigen, LMHC, LADC
- Addiction (Substance Use Disorder) Counselor
- Gloucester, MA
National Provider Identifier
1770665770
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Addiction (Substance Use Disorder) Counselor
- License
- 858
- Practice address
- 298 Washington St
Gloucester, MA 01930-4832 - Phone
- (978) 298-4001
- Fax
- (978) 491-6573
- NPI assigned
- Oct 19, 2006
- Sex
- Male
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Addiction (Substance Use Disorder) Counselor | 101YA0400X | 858 | MA | Primary |
| Mental Health Counselor | 101YM0800X | 408 | MA |
Addresses
Primary practice location
298 Washington St
Gloucester, MA 01930-4832
Mailing address
4 Margerie Street
Newburyport, MA 01950
Phone (978) 465-0451
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Not enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 858 | MA | MD | Addiction (Substance Use Disorder) Counselor |
| 408 | MA | MD | Chiropractor |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1161216000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1757548800000",
"number": "1770665770",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "4 MARGERIE STREET",
"city": "NEWBURYPORT",
"state": "MA",
"postal_code": "01950",
"telephone_number": "978-465-0451"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "298 WASHINGTON ST",
"city": "GLOUCESTER",
"state": "MA",
"postal_code": "019304832",
"telephone_number": "978-298-4001",
"fax_number": "978-491-6573"
}
],
"practiceLocations": [],
"basic": {
"last_name": "EIGEN",
"first_name": "DENNIS",
"middle_name": "JAY",
"name_prefix": "Mr.",
"credential": "LMHC, LADC",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2006-10-19",
"last_updated": "2025-09-11",
"status": "A"
},
"taxonomies": [
{
"code": "101YA0400X",
"taxonomy_group": "",
"desc": "Counselor, Addiction (Substance Use Disorder)",
"state": "MA",
"license": "858",
"primary": true
},
{
"code": "101YM0800X",
"taxonomy_group": "",
"desc": "Counselor, Mental Health",
"state": "MA",
"license": "408",
"primary": false
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Gloucester, MA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.