Keith Alexander Guest, M.D.

Primary specialty

Geriatric Medicine (Internal Medicine) PhysicianTaxonomy code 207RG0300X

License

20934 Issued in SC

Practice address

PO Box 487
Lexington, SC 29071-0487

Phone

(803) 699-9073

Fax

(866) 527-0937

NPI assigned

Jun 27, 2005

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other identifiers 2

Medicare fee-for-service enrollment

Enrolled in SC

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Geriatric MedicineAlso: Hospice/Palliative Care, Internal Medicine

Education

University of South Carolina School of Medicine, 1996

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Senior Health Associates, PAGroup PAC ID 6204739881, 9 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Amedisys Home Health of Bluffton Home health agency, Bluffton, SC, CCN 427048

Merit-based Incentive Payment System (MIPS)

Final score

77.72 of 100Reported as group

Quality

60.41

Improvement activities

40

Cost

57.84

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

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.

• Senior Health Associates, PA

  • Geriatric Medicine (Internal Medicine) Physician
  • Beaufort, SC
  • NPI 1023155728
  Medicare reassignment Care Compare group NPD
• Fairfield Memorial Hospital

  • Critical Access Hospital
  • Winnsboro, SC
  • NPI 1386604726
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Beaufort Home Health Partners L.L.C.

  • Home Health Agency
  • Bluffton, SC
  • NPI 1215110226
  Care Compare affiliation

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

{
    "created_epoch": "1119830400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753056000000",
    "number": "1285630020",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 487",
            "city": "LEXINGTON",
            "state": "SC",
            "postal_code": "290710487",
            "telephone_number": "803-699-9073",
            "fax_number": "866-527-0937"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "PO BOX 487",
            "city": "LEXINGTON",
            "state": "SC",
            "postal_code": "290710487",
            "telephone_number": "803-699-9073",
            "fax_number": "866-527-0937"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GUEST",
        "first_name": "KEITH",
        "middle_name": "ALEXANDER",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-06-27",
        "last_updated": "2025-07-21",
        "certification_date": "2025-07-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0002X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hospice and Palliative Medicine",
            "state": "SC",
            "license": "20934",
            "primary": false
        },
        {
            "code": "207RG0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Geriatric Medicine",
            "state": "SC",
            "license": "20934",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "GP2916",
            "state": "SC"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "380001558",
            "state": "SC"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Mary Ellen Grigsby, LPC
• Kathryn Lindsey Grogan, LISW-CP-S
• Barbara L Grubbs, ACNP
• Marissa Guarino
• Michelle L Gudelski, CRNA
• Andrew John Gummow, M.A.
• Kelly Fulmer Gunn, OTRL CHT
• Rebecca Gunter, RBT
• Sukhvinder Kaur Guram, D.M.D.
• Richard Kyle Guyton, M.D.

• Geriatric Medicine (Internal Medicine) Physician in Lexington, SC
• Providers in Lexington, SC by specialty
• Geriatric Medicine (Internal Medicine) Physician in South Carolina

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 21, 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.