Gerald A. Isenberg, M.D.

Primary specialty

Colon & Rectal Surgery PhysicianTaxonomy code 208C00000X

License

MD037695E Issued in PA

Practice address

255 W Lancaster Ave Ste 332
Paoli, PA 19301-1766

Phone

(610) 647-3077

Fax

(610) 993-0668

NPI assigned

Jul 19, 2006

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 PA

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

Colorectal Surgery (Proctology)

Education

Icahn School of Medicine at Mount Sinai, 1982

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Main Line HealthcareGroup PAC ID 1951215201, 1,154 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Thomas Jefferson University Hospital Hospital, Philadelphia, PA, CCN 390174
• Bryn Mawr Hospital Hospital, Bryn Mawr, PA, CCN 390139

Procedures performed for Medicare patients

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.

• Main Line Healthcare

  • Family Medicine Physician
  • Newtown Square, PA
  • NPI 1922077643

  Surgery

  Medicare reassignment Care Compare group NPD
• Jefferson University Physicians

  • General Practice Physician
  • Philadelphia, PA
  • NPI 1326093675

  Surgery

  Medicare reassignment NPD
• Jefferson University Physicians

  • Gastroenterology Physician
  • Phila, PA
  • NPI 1205898723
  NPD (past)

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

• Main Line Hospitals, Inc.

  • General Acute Care Hospital
  • Bryn Mawr, PA
  • NPI 1508971441
  Care Compare affiliation
• Thomas Jefferson University Hospitals Inc

  • General Acute Care Hospital
  • Philadelphia, PA
  • NPI 1215916002
  Care Compare affiliation

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

{
    "created_epoch": "1153267200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1776297600000",
    "number": "1821018532",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3803 W CHESTER PIKE STE 160",
            "city": "NEWTOWN SQUARE",
            "state": "PA",
            "postal_code": "190732336",
            "telephone_number": "610-647-3077",
            "fax_number": "610-993-0668"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "255 W LANCASTER AVE STE 332",
            "city": "PAOLI",
            "state": "PA",
            "postal_code": "193011766",
            "telephone_number": "610-647-3077",
            "fax_number": "610-993-0668"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1100 Walnut St",
            "address_2": "Suite 702",
            "address_purpose": "LOCATION",
            "city": "Philadelphia",
            "state": "PA",
            "postal_code": "191075563",
            "country_code": "US",
            "telephone_number": "215-955-5869",
            "fax_number": "215-955-2404",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "ISENBERG",
        "first_name": "GERALD",
        "middle_name": "A.",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-07-19",
        "last_updated": "2026-04-16",
        "certification_date": "2026-04-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208600000X",
            "taxonomy_group": "",
            "desc": "Surgery",
            "state": "PA",
            "license": "MD037695E",
            "primary": false
        },
        {
            "code": "208C00000X",
            "taxonomy_group": "",
            "desc": "Colon & Rectal Surgery",
            "state": "PA",
            "license": "MD037695E",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "8667101",
            "state": "NJ"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "001430759",
            "state": "PA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Janet Hummel, LCADC
• Megan Iannozzi, MS
• Impact Systems Inc.
• Ira M. Thal, MD, PC
• Rodney Isaacs, MHS
• Benjamin Jacobs, M.D.
• Irene Jacobs, MSW
• Ajit Sivananda Jada, M.D.
• James R Bollinger, MD PC
• Jay Ann Shop, Inc.

• Colon & Rectal Surgery Physician in Paoli, PA
• Providers in Paoli, PA by specialty
• Colon & Rectal Surgery Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 16, 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.
• 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.