Oa ASC LLC

Primary specialty

Ambulatory Surgical Clinic/CenterTaxonomy code 261QA1903X

Legal business name

OA ASC LLC

Practice address

33 Sewall St
Portland, ME 04102-2603

Phone

(207) 828-2101

Fax

(207) 553-7166

NPI assigned

Oct 24, 2024

Organization subpart

Yes

Parent organization

GROWTH ORTHOPEDICS SERVICES MSOAs reported in NPPES

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

Authorized official

Name

Kathryn H Hanna, MDNPI 1063575355

Title

Vice President

Phone

(207) 828-2101

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in ME

Enrollment records 1

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

Locations

Practitioners 2

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Kathryn Heidi Hanna, M.D.

  • Orthopaedic Hand Surgery Physician
  • Portland, ME
  • NPI 1063575355
  NPD Authorized official
• Anne M Karczewski, CRNA

  • Certified Registered Nurse Anesthetist
  • Portland, ME
  • NPI 1770534448
  NPD (past)

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

{
    "created_epoch": "1729728000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1739404800000",
    "number": "1811718521",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "33 SEWALL ST",
            "city": "PORTLAND",
            "state": "ME",
            "postal_code": "041022603",
            "telephone_number": "207-828-2101",
            "fax_number": "207-553-7166"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "33 SEWALL ST",
            "city": "PORTLAND",
            "state": "ME",
            "postal_code": "041022603",
            "telephone_number": "207-828-2101",
            "fax_number": "207-553-7166"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "OA ASC LLC",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "GROWTH ORTHOPEDICS SERVICES MSO",
        "enumeration_date": "2024-10-24",
        "last_updated": "2025-02-13",
        "certification_date": "2025-02-13",
        "status": "A",
        "authorized_official_last_name": "HANNA",
        "authorized_official_first_name": "KATHRYN",
        "authorized_official_middle_name": "H",
        "authorized_official_title_or_position": "VICE PRESIDENT",
        "authorized_official_telephone_number": "207-828-2101",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "261QA1903X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Ambulatory Surgical",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Eileen O'Shea, MD
• Brenna Marie O'Sullivan, LCPC-C
• Daria O'Sullivan, MD
• Kathleen O'Toole, LCSW
• Bronwen Berlekamp O'Wril, NP
• Jay Christopher Oakes, PT, DPT
• Douglas Oakford
• Grant Oakley, D.O.
• Oasis Care Solutions LLC
• Aimee Oates

• Ambulatory Surgical Clinic/Center in Portland, ME
• Providers in Portland, ME by specialty
• Ambulatory Surgical Clinic/Center in Maine

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 13, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• 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.