Nathan Merle Wolken, MA, CRC

Primary specialty

Mental Health CounselorTaxonomy code 101YM0800X

Practice address

1301 Summit St
Marshalltown, IA 50158-5484

Phone

(641) 752-1501

NPI assigned

Jan 30, 2015

Last updated

Apr 16, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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 IA

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

Medicare enrollment (NPD)

Enrolled

Credentials

Master of Arts

Practice roles

Interoperability endpoints

• FHIR API: https://fhir.nextgen.com/nge/prod/fhir-api-r4/fhir/r4/

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Duxbury Counseling

  • Community/Behavioral Health Agency
  • Duxbury, MA
  • NPI 1629377536
  NPD (past)
• Northeast Health Services, LLC

  dba Hyland Behavioral Health

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • Taunton, MA
  • NPI 1225067481
  NPD (past)

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

{
    "created_epoch": "1422576000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1776297600000",
    "number": "1790175669",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1301 SUMMIT ST",
            "city": "MARSHALLTOWN",
            "state": "IA",
            "postal_code": "501585484",
            "telephone_number": "641-752-1501"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1301 SUMMIT ST",
            "city": "MARSHALLTOWN",
            "state": "IA",
            "postal_code": "501585484",
            "telephone_number": "641-752-1501"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WOLKEN",
        "first_name": "NATHAN",
        "middle_name": "MERLE",
        "credential": "MA, CRC",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2015-01-30",
        "last_updated": "2026-04-16",
        "certification_date": "2026-04-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YM0800X",
            "taxonomy_group": "",
            "desc": "Counselor, Mental Health",
            "state": "NU",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Alison E. Wilson, MD
• Jessica Woellhof
• Susan Wolf
• Wolfe Clinic Eye Centers LC
• Wolfe Clinic Inc
• Rachel Wolken, RN/BSN
• Megan Woosley, DPT
• Emmaline M Wright, RD
• Kimberly D Yates
• Robert S Young II, MD

• Mental Health Counselor in Marshalltown, IA
• Providers in Marshalltown, IA by specialty
• Mental Health Counselor in Iowa

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 16, 2026; 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.