Marissa Block LLC

Primary specialty

Mental Health Clinic/Center (Including Community Mental Health Center)Taxonomy code 261QM0801X

Legal business name

MARISSA BLOCK LLC

Practice address

305 W Pennsylvania Ave
Towson, MD 21204-4413

Phone

(443) 300-6905

Fax

(443) 233-0231

NPI assigned

Oct 7, 2026

Last updated

Oct 7, 2026By the provider in NPPES

Organization subpart

Yes

Parent organization

MARISSA BLOCK LLCAs reported in NPPES

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

Authorized official

Name

Marissa Block Kalkstein, LCPC-S

Title

Ceo & Owner

Phone

(443) 300-6905

Specialties & licenses 7

Addresses

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

{
    "created_epoch": "1791331200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1791331200000",
    "number": "1831093228",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "305 W PENNSYLVANIA AVE",
            "city": "TOWSON",
            "state": "MD",
            "postal_code": "212044413",
            "telephone_number": "443-300-6905",
            "fax_number": "443-233-0231"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "305 W PENNSYLVANIA AVE",
            "city": "TOWSON",
            "state": "MD",
            "postal_code": "212044413",
            "telephone_number": "443-300-6905",
            "fax_number": "443-233-0231"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "MARISSA BLOCK LLC",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "MARISSA BLOCK LLC",
        "enumeration_date": "2026-10-07",
        "last_updated": "2026-10-07",
        "certification_date": "2026-10-07",
        "status": "A",
        "authorized_official_last_name": "KALKSTEIN",
        "authorized_official_first_name": "MARISSA",
        "authorized_official_middle_name": "BLOCK",
        "authorized_official_title_or_position": "CEO & OWNER",
        "authorized_official_telephone_number": "443-300-6905",
        "authorized_official_credential": "LCPC-S"
    },
    "taxonomies": [
        {
            "code": "261QM0801X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Mental Health (Including Community Mental Health Center)",
            "state": null,
            "license": null,
            "primary": true
        },
        {
            "code": "363LP0808X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Psychiatric/Mental Health",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "101YP2500X",
            "taxonomy_group": "",
            "desc": "Counselor, Professional",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "106H00000X",
            "taxonomy_group": "",
            "desc": "Marriage & Family Therapist",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Michael J Marion, MD
• Marissa Block LLC (Insight Therapy)
• Marissa Block LLC (Insight Therapy)
• Jonay Mark
• Teresa Rose-Marie Mark
• Amy Lynn Marks, M.D.
• Susan M Marks, LCPC

• Mental Health Clinic/Center (Including Community Mental Health Center) in Towson, MD
• Providers in Towson, MD by specialty
• Mental Health Clinic/Center (Including Community Mental Health Center) in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 7, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.

Verify at the official NPI Registry.