Marisa Gefen, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

MD439866 Issued in PA

Practice address

37 S 40TH St
Philadelphia, PA 19104-3042

Phone

(215) 444-7470

Fax

(215) 764-6556

NPI assigned

Jun 5, 2007

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other names 1

• Dr. Marisa Bashkin Former name

Medicare fee-for-service enrollment

Enrolled in PA, NY2 enrollments

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 2

Specialty

Internal Medicine

Education

Other, 2007

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Osh - PA Physicians Group, PCGroup PAC ID 7517213879, 113 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://fhir4.healow.com/fhir/r4/ACJBAA
• Direct secure messaging: marisa.gefen@oakstreethealth.gwaydirect.com

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.

• Osh - PA Physicians Group, PC

  • Primary Care Clinic/Center
  • Philadelphia, PA
  • NPI 1811405533

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• Ninth Street Internal Medicine Associates LTD

  • Internal Medicine Physician
  • Philadelphia, PA
  • NPI 1598719627
  Medicare reassignment NPD
• Oak Street Health of New York Medical Group PC

  • Primary Care Clinic/Center
  • Brooklyn, NY
  • NPI 1780209445

  Internal Medicine

  Medicare reassignment NPD
• Ahpaffs,LLC

  • Urgent Care Clinic/Center
  • Philadelphia, PA
  • NPI 1275985814
  NPD
• Nova Physician Group PLLC

  • Primary Care Clinic/Center
  • York, PA
  • NPI 1619723699
  NPD (past)
• Osh - Ri Physicians Group, PC

  • Primary Care Clinic/Center
  • Warwick, RI
  • NPI 1063984813

  Internal Medicine

  NPD (past)
• Osh-Mi Physicians Group PC

  • Family Medicine Physician
  • Greensboro, NC
  • NPI 1033766092

  Internal Medicine

  NPD (past)

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

{
    "created_epoch": "1181001600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1745971200000",
    "number": "1386846806",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 746722",
            "city": "ATLANTA",
            "state": "GA",
            "postal_code": "303746722",
            "telephone_number": "312-733-9730",
            "fax_number": "773-866-8014"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "37 S 40TH ST",
            "city": "PHILADELPHIA",
            "state": "PA",
            "postal_code": "191043042",
            "telephone_number": "215-444-7470",
            "fax_number": "215-764-6556"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1113 Carlisle Rd",
            "address_purpose": "LOCATION",
            "city": "York",
            "state": "PA",
            "postal_code": "174044939",
            "country_code": "US",
            "telephone_number": "717-200-1567",
            "fax_number": "717-674-6145",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GEFEN",
        "first_name": "MARISA",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-06-05",
        "last_updated": "2025-04-30",
        "certification_date": "2025-04-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "PA",
            "license": "MD439866",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "MARISA",
            "last_name": "BASHKIN",
            "prefix": "DR.",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Amy Ellen Gedrich, LCSW
• Cheryl Lynne Gee-Maurer, CRNP
• Gee-Net Home Care LLC
• Tiffany Fernandes Gee, MD
• Julia English Geer
• Sophia R Geffen, CRNP
• Warren B Gefter, MD
• Laura Jaye Geftman, MSS, LSW
• Jesse Geguzis, LSW, MED.
• Christina Kay Gehman, PA-C

• Internal Medicine Physician in Philadelphia, PA
• Providers in Philadelphia, PA by specialty
• Internal Medicine Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 30, 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.