Individual provider Active NPI

John Gregor Holzheimer, LISW

  • Counselor
  • Lakewood, OH
National Provider Identifier
1124572987
Registry record updated Mar 21, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
CounselorTaxonomy code 101Y00000X
License
I.2506361 Issued in OH
Practice address
14701 Detroit Ave RM 350-34
Lakewood, OH 44107-4115
Phone
(212) 470-3223
NPI assigned
Aug 10, 2016
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Mar 21, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Counselor 101Y00000X I.2506361 OH Primary

Addresses

Primary practice location

14701 Detroit Ave RM 350-34
Lakewood, OH 44107-4115

Mailing address

14701 Detroit Ave RM 350-34
Lakewood, OH 44107-4115
Phone (212) 470-3223

Other practice location 1

248 E 151st St
Cleveland, OH 44110-1215
Phone (212) 470-3223

Other names 1

  • Mr. Greg Holzheimer Other name

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in OH
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: No
  • Power mobility devices: No
  • Hospice: No
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20250328002547 OH Practitioner - Clinical Social Worker 4587187638 Reassigns benefits to 1 organization

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled

Practice roles

OrganizationSpecialtyStatusNew patients
Signature Health, Inc. Current Accepting new patients
Signature Health, Inc CurrentSince Feb 27, 2025 Accepting new patients
Signature Health Inc CurrentSince Feb 27, 2025 Accepting new patients

Locations

21100 Southgate Park Blvd
Maple Heights, OH 44137
Phone (216) 663-6100

7232 Justin Way
Mentor, OH 44060
Phone (440) 488-2855

38876 Mentor Ave
Willoughby, OH 44094
Phone (440) 954-3333

38882 Mentor Ave
Willoughby, OH 44094

Organizations & group practices 3

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": "1470787200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1742515200000",
    "number": "1124572987",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "14701 DETROIT AVE RM 350-34",
            "city": "LAKEWOOD",
            "state": "OH",
            "postal_code": "441074115",
            "telephone_number": "212-470-3223"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "14701 DETROIT AVE RM 350-34",
            "city": "LAKEWOOD",
            "state": "OH",
            "postal_code": "441074115",
            "telephone_number": "212-470-3223"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "248 E 151st St",
            "address_purpose": "LOCATION",
            "city": "Cleveland",
            "state": "OH",
            "postal_code": "441101215",
            "country_code": "US",
            "telephone_number": "212-470-3223",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HOLZHEIMER",
        "first_name": "JOHN",
        "middle_name": "GREGOR",
        "name_prefix": "Mr.",
        "credential": "LISW",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-08-10",
        "last_updated": "2025-03-21",
        "certification_date": "2025-03-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101Y00000X",
            "taxonomy_group": "",
            "desc": "Counselor",
            "state": "OH",
            "license": "I.2506361",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "GREG",
            "last_name": "HOLZHEIMER",
            "prefix": "MR.",
            "credential": "LISW",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

Other providers in Lakewood, OH

Sources for this page

Verify at the official NPI Registry.