Alexander Pyronneau, MD/PHD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

95974 Issued in SC

Practice address

316 Calhoun St
Charleston, SC 29401-1113

Phone

(843) 724-2000

NPI assigned

Mar 29, 2022

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 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

Internal Medicine

Education

Albert Einstein College of Medicine of Yeshiva University, 2022

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

24 On Physicians of SC LLCGroup PAC ID 5890127344, 136 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Bon Secours-St Francis Xavier Hospital Hospital, Charleston, SC, CCN 420065
• Roper St Francis Hospital-Berkeley Inc Hospital, Summerville, SC, CCN 420110
• Mount Pleasant Hospital Hospital, Mount Pleasant, SC, CCN 420104
• Roper Hospital Hospital, Charleston, SC, CCN 420087

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine, Doctor of Philosophy

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.

• 24 On Physicians of SC, LLC

  • Hospitalist Physician
  • Charleston, SC
  • NPI 1144877655
  Medicare reassignment Care Compare group NPD

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

• Bon Secours St. Francis Xavier Hospital Inc.

  • General Acute Care Hospital
  • Charleston, SC
  • NPI 1851361778
  Care Compare affiliation
• Roper Hospital, Inc

  • General Acute Care Hospital
  • Charleston, SC
  • NPI 1962472860
  Care Compare affiliation
• Roper St Francis Hospital-Berkeley Inc.

  • General Acute Care Hospital
  • Summerville, SC
  • NPI 1336603646
  Care Compare affiliation
• Roper St. Francis Mount Pleasant Hospital

  • General Acute Care Hospital
  • Mt Pleasant, SC
  • NPI 1255645644
  Care Compare affiliation

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

{
    "created_epoch": "1648512000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763078400000",
    "number": "1326788480",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "316 CALHOUN ST",
            "city": "CHARLESTON",
            "state": "SC",
            "postal_code": "294011113",
            "telephone_number": "843-724-2000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "316 CALHOUN ST",
            "city": "CHARLESTON",
            "state": "SC",
            "postal_code": "294011113",
            "telephone_number": "843-724-2000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "PYRONNEAU",
        "first_name": "ALEXANDER",
        "credential": "MD/PHD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2022-03-29",
        "last_updated": "2025-11-14",
        "certification_date": "2025-11-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "SC",
            "license": "95974",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Gregory Daniel Puthoff, D.O.
• Whitney Brooke Putillion, PA-C
• Sara Putman, LMT, LAC
• Kimberly Pyatt
• Sadie Pyle
• Qol Dtec Inc
• Harrison Lawrence Quaal, MD
• Quality Home Care LLC
• Quality Sleep Solutions Charleston LLC
• Quality Sleep Solutions James Island LLC

• Internal Medicine Physician in Charleston, SC
• Providers in Charleston, SC by specialty
• Internal Medicine Physician in South Carolina

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 14, 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.