Jonathan Pfeffer, LCSW

Primary specialty

Clinical Social WorkerTaxonomy code 1041C0700X

License

CW027564 Issued in PA

Practice address

419 S 19TH St
Philadelphia, PA 19146-1415

Phone

(856) 376-7522

NPI assigned

Jun 28, 2024

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

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

State licenses

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

{
    "created_epoch": "1719532800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1785369600000",
    "number": "1831934074",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "419 S 19TH ST",
            "city": "PHILADELPHIA",
            "state": "PA",
            "postal_code": "191461415",
            "telephone_number": "856-376-7522"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "419 S 19TH ST",
            "city": "PHILADELPHIA",
            "state": "PA",
            "postal_code": "191461415",
            "telephone_number": "856-376-7522"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "PFEFFER",
        "first_name": "JONATHAN",
        "credential": "LCSW",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2024-06-28",
        "last_updated": "2026-07-30",
        "certification_date": "2026-07-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "PA",
            "license": "CW027564",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Lia Rae Pezzato, MFT
• William J Pezzello Jr., D.C.
• Kristen Pezzillo, MSPT, CWS
• Gino Vincenzo Pezzone
• Kimberly Ann Pfau, DO
• Jill A Pfeiffenberger, PHARMD
• Janice Pfeiffer, PT
• Douglas Shamy Pfeil, M.D./PH.D.
• Alexandra Lauren Pfister, MD
• Stephen Joseph Pflugfelder, MA, LPC

• Clinical Social Worker in Philadelphia, PA
• Providers in Philadelphia, PA by specialty
• Clinical Social Worker in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 30, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.