Individual provider Active NPI

Alexander Richard Vlavianos, LMHC

  • Mental Health Counselor
  • Boston, MA
National Provider Identifier
1659857803
Registry record updated Apr 21, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Mental Health CounselorTaxonomy code 101YM0800X
License
LMHC10004432 Issued in MA
Practice address
400 Fenway
Boston, MA 02115-5798
Phone
(617) 735-9920
Fax
(617) 735-9919
NPI assigned
Jul 11, 2018
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Apr 21, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Mental Health Counselor 101YM0800X LMHC10004432 MA Primary

Addresses

Primary practice location

400 Fenway
Boston, MA 02115-5798

Mailing address

400 Fenway
Boston, MA 02115-5798
Phone (617) 735-9920

Other names 1

  • Alex Vlavianos Professional name

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

LicenseStateTypeSpecialty
LMHC10004432MAMDMental Health Counselor

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1531267200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1776729600000",
    "number": "1659857803",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "400 FENWAY",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021155798",
            "telephone_number": "617-735-9920",
            "fax_number": "617-735-9919"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "400 FENWAY",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021155798",
            "telephone_number": "617-735-9920",
            "fax_number": "617-735-9919"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "VLAVIANOS",
        "first_name": "ALEXANDER",
        "middle_name": "RICHARD",
        "credential": "LMHC",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-07-11",
        "last_updated": "2026-04-21",
        "certification_date": "2026-04-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YM0800X",
            "taxonomy_group": "",
            "desc": "Counselor, Mental Health",
            "state": "MA",
            "license": "LMHC10004432",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "ALEX",
            "last_name": "VLAVIANOS",
            "credential": "LMHC",
            "code": "2",
            "type": "Professional Name"
        }
    ]
}

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 Apr 21, 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.

Verify at the official NPI Registry.