Active NPI
Aj Guerrero, LMHC
- Mental Health Counselor
- Boston, MA
National Provider Identifier
1922520840
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Mental Health Counselor
- License
- 12054
- Practice address
- 3464 Washington St
Boston, MA 02130-2665 - Phone
- (857) 371-5101
- NPI assigned
- Jul 12, 2017
- Sex
- Female
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Mental Health Counselor | 101YM0800X | 12054 | MA | Primary |
Addresses
Primary practice location
3464 Washington St
Boston, MA 02130-2665
Mailing address
3464 Washington St
Boston, MA 02130-2665
Phone (857) 371-5101
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 |
|---|---|---|---|
| 12054 | MA | MD | Music Therapist |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Child and Family Psychological Services, PLLC | Mental Health | Past | Accepting new patients |
Organizations & group practices 1
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1499817600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1778025600000",
"number": "1922520840",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "3464 WASHINGTON ST",
"city": "BOSTON",
"state": "MA",
"postal_code": "021302665",
"telephone_number": "857-371-5101"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "3464 WASHINGTON ST",
"city": "BOSTON",
"state": "MA",
"postal_code": "021302665",
"telephone_number": "857-371-5101"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GUERRERO",
"first_name": "AJ",
"credential": "LMHC",
"sole_proprietor": "YES",
"sex": "F",
"enumeration_date": "2017-07-12",
"last_updated": "2026-05-06",
"certification_date": "2026-05-06",
"status": "A"
},
"taxonomies": [
{
"code": "101YM0800X",
"taxonomy_group": "",
"desc": "Counselor, Mental Health",
"state": "MA",
"license": "12054",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Boston, MA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 6, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.