Walter M Klein, MD

Primary specialty

Anatomic Pathology & Clinical Pathology PhysicianTaxonomy code 207ZP0102X

License

MD428595 Issued in PA

Practice address

100 E Lancaster Ave
Pathology Dept, Lankenau Hospital
Wynnewood, PA 19096-3450

Phone

(610) 645-2613

NPI assigned

Jun 18, 2006

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

Other identifiers 1

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

Pathology

Education

Perelman School of Med at the University of Pennsylvania, 2000

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Main Line Pathology Associates, PCGroup PAC ID 9830179381, 11 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Bryn Mawr Hospital Hospital, Bryn Mawr, PA, CCN 390139
• Main Line Hospital Lankenau Hospital, Wynnewood, PA, CCN 390195
• Paoli Hospital Hospital, Paoli, PA, CCN 390153
• Riddle Memorial Hospital Hospital, Media, PA, CCN 390222
• Hospital of Univ of Pennsylvania Hospital, Philadelphia, PA, CCN 390111

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 Pathology Associates, PC

  • Clinical Pathology/Laboratory Medicine Physician
  • Bryn Mawr, PA
  • NPI 1548260482
  Medicare reassignment Care Compare group NPD Authorized official

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

• Hospital of the University of PA

  • Ambulatory Fertility Facility
  • Phila, PA
  • NPI 1033262316

  Hospital

  Care Compare affiliation
• Main Line Hospitals, Inc.

  • General Acute Care Hospital
  • Paoli, PA
  • NPI 1215042114
  Care Compare affiliation
• Main Line Hospitals, Inc.

  • General Acute Care Hospital
  • Wynnewood, PA
  • NPI 1245335629
  Care Compare affiliation
• Main Line Hospitals, Inc.

  • General Acute Care Hospital
  • Bryn Mawr, PA
  • NPI 1508971441
  Care Compare affiliation
• Riddle Memorial Hospital

  • General Acute Care Hospital
  • Media, PA
  • NPI 1407856099
  Care Compare affiliation
• Trustees of the University of Pennsylvania

  • General Acute Care Hospital
  • Philadelphia, PA
  • NPI 1851370910
  Care Compare affiliation

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

{
    "created_epoch": "1150588800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1326083833",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "100 E LANCASTER AVE",
            "address_2": "PATHOLOGY DEPT, LANKENAU HOSPITAL",
            "city": "WYNNEWOOD",
            "state": "PA",
            "postal_code": "190963450",
            "telephone_number": "610-645-2613"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "100 E LANCASTER AVE",
            "address_2": "PATHOLOGY DEPT, LANKENAU HOSPITAL",
            "city": "WYNNEWOOD",
            "state": "PA",
            "postal_code": "190963450",
            "telephone_number": "610-645-2613"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KLEIN",
        "first_name": "WALTER",
        "middle_name": "M",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-18",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207ZP0102X",
            "taxonomy_group": "",
            "desc": "Pathology, Anatomic Pathology & Clinical Pathology",
            "state": "PA",
            "license": "MD428595",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "PENNA LICENSE",
            "identifier": "MD428595",
            "state": "PA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Andrea Kirsch, CRNP
• Cullen Leeann Kisner, MD
• Michael Kitchens, MD
• Thomas Klee, PH.D.
• Jonah Klein
• Grant Knoll, MD
• Tamika Knox, LCSW
• Sravya Koduri
• Julia Rose Kompare
• Drew Anthony Kopicki

• Anatomic Pathology & Clinical Pathology Physician in Wynnewood, PA
• Providers in Wynnewood, PA by specialty
• Anatomic Pathology & Clinical Pathology Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.