Mark W Colterjohn, LCSW

Primary specialty

Clinical Social WorkerTaxonomy code 1041C0700X

License

070239 Issued in NY

Practice address

353 Lexington Ave Ste 300
New York, NY 10016-0941

Phone

(646) 872-5451

NPI assigned

Aug 21, 2006

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in NY

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

Specialty

Clinical Social Worker

Education

Other, 1994

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Interoperability endpoints

• FHIR API: https://api.qualifacts.org/api/fhir/bleulerpc/r4/

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.

• Nyc Integrative Psychotherapy LCSW PLLC

  dba Flatiron Integrative Psychotherapy

  • Clinical Social Worker
  • New York, NY
  • NPI 1083126015
  NPD Authorized official
• Bleuler Psychotherapy Center, Inc.

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • Forest Hills, NY
  • NPI 1801949706
  NPD (past)
• Gestalt Associates for Psychotherapy

  • Clinical Social Worker
  • New York, NY
  • NPI 1841288073
  NPD (past)

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

{
    "created_epoch": "1156118400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1745539200000",
    "number": "1356457642",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "672 FULTON ST APT 3B",
            "city": "BROOKLYN",
            "state": "NY",
            "postal_code": "112171569",
            "telephone_number": "646-872-5451"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "353 LEXINGTON AVE STE 300",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100160941",
            "telephone_number": "646-872-5451"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "920 Broadway",
            "address_2": "8th floor, suite #2",
            "address_purpose": "LOCATION",
            "city": "New York",
            "state": "NY",
            "postal_code": "100106004",
            "country_code": "US",
            "telephone_number": "646-872-5451",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "672 Fulton St Apt 3B",
            "address_purpose": "LOCATION",
            "city": "Brooklyn",
            "state": "NY",
            "postal_code": "112171569",
            "country_code": "US",
            "telephone_number": "646-872-5451",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "COLTERJOHN",
        "first_name": "MARK",
        "middle_name": "W",
        "name_prefix": "Mr.",
        "credential": "LCSW",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-08-21",
        "last_updated": "2025-04-25",
        "certification_date": "2025-04-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "NY",
            "license": "070239",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ariel A Colquhoun, NURSE PRACTITIONER
• Macalistair Ian Colquhoun, MD
• Catherine Claire Colson, NP
• Llaselle Colson, FNP
• Edward W Colt, MD
• Hallie Coltin, M.D.
• Annalise Colton, M.S CCC-SLP
• Elana Colton, LMSW
• Erica Colton, MS, FNP
• Jana Colton, M.D.

• Clinical Social Worker in New York, NY
• Providers in New York, NY by specialty
• Clinical Social Worker in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 25, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.