Margaret Muthoni Ngumi, FNP-C PMHNP-BC

Primary specialty

Psychiatric/Mental Health Nurse PractitionerTaxonomy code 363LP0808X

License

RN203586 Issued in GA

Practice address

400 Union Ave SE Ste 200
Olympia, WA 98501-2060

Phone

(833) 351-8255

Fax

(770) 704-2765

NPI assigned

Jun 25, 2013

Last updated

Aug 1, 2025By 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 3

Addresses

Medicare fee-for-service enrollment

Enrolled in GA

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 1

Specialty

Nurse Practitioner

Education

Other, 2022

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Floyd Physicians LLCGroup PAC ID 6406852375, 62 clinicians

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

100 of 100Reported as group

Promoting interoperability

99

Improvement activities

40

Merit-based Incentive Payment System (MIPS)

Final score

93.93 of 100Reported as apm

Quality

82.14

Promoting interoperability

100

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Master of Science, Nurse Practitioner

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mngumi112478@directwellstar.org

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.

• Floyd Physicians, LLC

  dba Atrium Health Floyd Specialty Care

  • Neonatal-Perinatal Medicine Physician
  • Rome, GA
  • NPI 1992814586
  Medicare reassignment Care Compare group NPD
• MCCD FL Psychiatry Services PA

  dba Talkiatry

  • Psychiatry Physician
  • Jacksonville, FL
  • NPI 1659003457

  GA

  Medicare reassignment NPD
• Wellstar Medical Group, LLC

  dba WellStar Family Medicine ACW

  • Family Medicine Physician
  • Kennesaw, GA
  • NPI 1558664003
  Medicare reassignment NPD
• Elpida Psychiatry

  • Adult Mental Health Clinic/Center
  • Marietta, GA
  • NPI 1932800703
  NPD Authorized official
• Wellstar Medical Group, LLC

  • Multi-Specialty Clinic/Center
  • Marietta, GA
  • NPI 1275992240
  NPD
• Wellstar Medical Group, LLC

  dba WellStar Creekside Pediatrics

  • Pediatrics Physician
  • Douglasville, GA
  • NPI 1912203050
  NPD
• Wellstar Cardiovascular Medicine, LLC

  • Cardiovascular Disease Physician
  • Marietta, GA
  • NPI 1457320319
  NPD (past)

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

{
    "created_epoch": "1372118400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1754006400000",
    "number": "1558701458",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "707 WHITLOCK AVE SW STE A40",
            "city": "MARIETTA",
            "state": "GA",
            "postal_code": "300644654",
            "telephone_number": "770-525-7295"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "400 UNION AVE SE STE 200",
            "city": "OLYMPIA",
            "state": "WA",
            "postal_code": "985012060",
            "telephone_number": "833-351-8255",
            "fax_number": "770-704-2765"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "NGUMI",
        "first_name": "MARGARET",
        "middle_name": "MUTHONI",
        "credential": "FNP-C PMHNP-BC",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2013-06-25",
        "last_updated": "2025-08-01",
        "certification_date": "2025-08-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "GA",
            "license": "RN203586",
            "primary": false
        },
        {
            "code": "363LP0808X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Psychiatric/Mental Health",
            "state": "WA",
            "license": "AP61321033",
            "primary": false
        },
        {
            "code": "363LP0808X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Psychiatric/Mental Health",
            "state": "GA",
            "license": "RN203586",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• William Newmann, MD
• David L Newton, M.D.
• Whitney Charlene Newton, LMP
• Nexus Consultants PLLC
• John Ngo, D.O.
• Steven Quang-Huy Nguy, OD
• Anh Minh Nguyen, PHARM.D
• Anthony S Nguyen, DMD
• Chanh Tam Nguyen
• Diep Thi Nguyen, PHARM D

• Psychiatric/Mental Health Nurse Practitioner in Olympia, WA
• Providers in Olympia, WA by specialty
• Psychiatric/Mental Health Nurse Practitioner in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 1, 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.