Individual provider Active NPI

Heather Larkin

  • Addiction (Substance Use Disorder) Counselor
  • Marion, OH
National Provider Identifier
1225922602
Registry record updated Dec 22, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Addiction (Substance Use Disorder) CounselorTaxonomy code 101YA0400X
License
CDCA.194506 Issued in OH
Practice address
827 N Main St
Marion, OH 43302-1736
Phone
(740) 914-5000
NPI assigned
Jun 9, 2025
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Dec 22, 2025

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Mental Health CounselorGroup: 193200000X MULTI-SPECIALTY GROUP 101YM0800X
Case Manager/Care CoordinatorGroup: 193200000X MULTI-SPECIALTY GROUP 171M00000X
Addiction (Substance Use Disorder) CounselorGroup: 193200000X MULTI-SPECIALTY GROUP 101YA0400X CDCA.194506 OH Primary

Addresses

Primary practice location

827 N Main St
Marion, OH 43302-1736

Mailing address

827 N Main St
Marion, OH 43302-1736
Phone (740) 914-5000

Other practice location 1

333 E Center St Ste 302
Marion, OH 43302-4142
Phone (740) 914-5000

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address hlarkin@d1recovery.com

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
CDCA.194506OHMDAddiction (Substance Use Disorder) Counselor

NPI Registry JSON

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

{
    "created_epoch": "1749427200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1766361600000",
    "number": "1225922602",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "827 N MAIN ST",
            "city": "MARION",
            "state": "OH",
            "postal_code": "433021736",
            "telephone_number": "740-914-5000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "827 N MAIN ST",
            "city": "MARION",
            "state": "OH",
            "postal_code": "433021736",
            "telephone_number": "740-914-5000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "333 E Center St Ste 302",
            "address_purpose": "LOCATION",
            "city": "Marion",
            "state": "OH",
            "postal_code": "433024142",
            "country_code": "US",
            "telephone_number": "740-914-5000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LARKIN",
        "first_name": "HEATHER",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2025-06-09",
        "last_updated": "2025-12-22",
        "certification_date": "2025-12-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YM0800X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Counselor, Mental Health",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "171M00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Case Manager/Care Coordinator",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "101YA0400X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Counselor, Addiction (Substance Use Disorder)",
            "state": "OH",
            "license": "CDCA.194506",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "hlarkin@d1recovery.com",
            "affiliation": "N",
            "endpointDescription": "email",
            "address_1": "827 N Main St",
            "city": "Marion",
            "state": "OH",
            "country_code": "US",
            "postal_code": "433021736",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Marion, OH

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 22, 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.

Verify at the official NPI Registry.