Ryan Thomas Callahan, DPM

Primary specialty

PodiatristTaxonomy code 213E00000X

License

E6042 Issued in CA

Practice address

150 S Huntington Ave
Boston, MA 02130-4817

Phone

(857) 364-4802

NPI assigned

Mar 31, 2021

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 CA

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

Medicare enrollment (NPD)

Enrolled

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.

• UCSF Dept of Surgery

  • Surgery Physician
  • San Francisco, CA
  • NPI 1477627537
  Medicare reassignment NPD
• UCSF Medical Group Business Services

  • Internal Medicine Physician
  • San Francisco, CA
  • NPI 1477624104
  Medicare reassignment NPD
• University of California San Francisco

  • Pediatrics Physician
  • San Francisco, CA
  • NPI 1861578973
  Medicare reassignment NPD
• University of California SFGH Medical Group

  • Orthopaedic Surgery Physician
  • San Francisco, CA
  • NPI 1760457816
  Medicare reassignment NPD
• UCSF Medical Group Business Services

  • Health Service Clinic/Center
  • San Francisco, CA
  • NPI 1194115246
  NPD
• University of California San Francisco

  • Internal Medicine Physician
  • San Francisco, CA
  • NPI 1164512851
  NPD
• University of California San Francisco

  • Community/Retail Pharmacy
  • San Francisco, CA
  • NPI 1659141711
  NPD
• University of California SFGH Medical Group

  • Vascular Surgery Physician
  • San Francisco, CA
  • NPI 1033913959
  NPD

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

{
    "created_epoch": "1617148800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770854400000",
    "number": "1265010284",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "150 S HUNTINGTON AVE",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021304817",
            "telephone_number": "857-364-4802"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "150 S HUNTINGTON AVE",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021304817",
            "telephone_number": "857-364-4802"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CALLAHAN",
        "first_name": "RYAN",
        "middle_name": "THOMAS",
        "name_prefix": "Dr.",
        "credential": "DPM",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2021-03-31",
        "last_updated": "2026-02-12",
        "certification_date": "2026-02-12",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "213E00000X",
            "taxonomy_group": "",
            "desc": "Podiatrist",
            "state": "CA",
            "license": "E6042",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Dana Goodwin Callahan
• Grace Porter Callahan, MD
• Janet Callahan, PT
• Michael Callahan, MD
• Molly Kathleen Callahan, RN
• Nancy Callan, M.D.
• Tricia A Callaway, LICSW
• Nelson P Calle, CRNA
• Mark P Callery, M.D.
• William Eamon Callison, MD, PHD

• Podiatrist in Boston, MA
• Providers in Boston, MA by specialty
• Podiatrist in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 12, 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.