Shelly Christina Williams-Isingo, FNP-BC, PMHNP-BC

Primary specialty

Psychiatric/Mental Health Nurse PractitionerTaxonomy code 363LP0808X

License

AP138281 Issued in TX

Practice address

440 Cobia Dr Ste 602
Katy, TX 77494-6892

Phone

(713) 987-7828

NPI assigned

Jun 27, 2017

Last updated

Sep 8, 2026By the provider in NPPES

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 3

Medicare fee-for-service enrollment

Enrolled in LA, TX, WA, MI, OH, FL, VA, DC8 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 8

Specialty

Nurse Practitioner

Education

Other, 2017

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Mosaic Mental HealthGroup PAC ID 1254732043, 3 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Locations (25 of 33)

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.

• Mosaic Mental Health

  • Psychiatric/Mental Health Nurse Practitioner
  • Fulshear, TX
  • NPI 1437733847
  Medicare reassignment Care Compare group NPD
• Calcasieu Urgent Care LLC

  dba Calcasieu Urgent Care

  • Urgent Care Clinic/Center
  • Lake Charles, LA
  • NPI 1467715490
  Medicare reassignment NPD
• Hulin Urgent Care Services LLC

  dba SouthStar Urgent Care

  • Urgent Care Clinic/Center
  • New Iberia, LA
  • NPI 1699049262
  Medicare reassignment NPD
• Firsthand Health of Florida PA

  • General Practice Physician
  • Jacksonville, FL
  • NPI 1316685605
  Medicare reassignment
• Firsthand Health of Michigan, P.C.

  • General Practice Physician
  • Allen Park, MI
  • NPI 1184402745
  Medicare reassignment
• Firsthand Health of Ohio

  • General Practice Physician
  • Cleveland, OH
  • NPI 1780348185
  Medicare reassignment
• Firsthand Health of Virginia PC

  • General Practice Physician
  • Richmond, VA
  • NPI 1780489823

  DC

  Medicare reassignment
• Firsthand Health of Washington PC

  • General Practice Physician
  • Tacoma, WA
  • NPI 1649058215
  Medicare reassignment
• Calcasieu Urgent Care, LLC

  • Rural Health Clinic/Center
  • Breaux Bridge, LA
  • NPI 1194482398
  NPD
• Hulin Urgent Care Services LLC

  dba Southstar Urgent Care

  • Urgent Care Clinic/Center
  • Rayne, LA
  • NPI 1750055141
  NPD

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

{
    "created_epoch": "1498521600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788825600000",
    "number": "1538680822",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "440 COBIA DR STE 602",
            "city": "KATY",
            "state": "TX",
            "postal_code": "774946892",
            "telephone_number": "713-987-7828",
            "fax_number": "713-804-9449"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "440 COBIA DR STE 602",
            "city": "KATY",
            "state": "TX",
            "postal_code": "774946892",
            "telephone_number": "713-987-7828"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMS-ISINGO",
        "first_name": "SHELLY",
        "middle_name": "CHRISTINA",
        "credential": "FNP-BC, PMHNP-BC",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2017-06-27",
        "last_updated": "2026-09-08",
        "certification_date": "2026-09-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LP0808X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Psychiatric/Mental Health",
            "state": "TX",
            "license": "AP138281",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "LOUISIANA STATE BOARD OF NURSING",
            "identifier": "AP09322",
            "state": "LA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "WASHINGTON  STATE LICENSE",
            "identifier": "AP61561016",
            "state": "WA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "TEXAS LICENSE",
            "identifier": "AP138281",
            "state": "TX"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Delorean S. Wilkinson-McGee, LCSW
• Severa Willacker, DPT
• William a Currie MD PA
• Williams Medical Transportation Services
• Dawn Marie Williams-Diggins, DPM
• Ahkil Williams
• Alesia Okeke Williams
• Alexia Williams
• Briannah Williams
• Cenesia Williams, RBT

• Psychiatric/Mental Health Nurse Practitioner in Katy, TX
• Providers in Katy, TX by specialty
• Psychiatric/Mental Health Nurse Practitioner in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 8, 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.
• 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.