Individual provider Active NPI

Harold J Alfert, M.D.

  • Urology Physician
  • Baltimore, MD
National Provider Identifier
1316901903
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Urology PhysicianTaxonomy code 208800000X
License
D37525 Issued in MD
Practice address
4940 Eastern Ave
Baltimore, MD 21224-2735
Phone
(410) 550-7008
NPI assigned
Apr 12, 2006
Sex
Male
Sole proprietor
No

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
D37525MDMDUrology Physician

Specialties & licenses 1

NPPES NPI Registry
Specialty (taxonomy)CodeLicenseStatePrimary
Urology Physician 208800000X D37525 MD Primary

Addresses

NPPES NPI Registry

Primary practice location

4940 Eastern Ave
Baltimore, MD 21224-2735

Mailing address

PO Box 64255
Baltimore, MD 21264-4255

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format, last updated by the provider on Jul 13, 2026.

{
    "created_epoch": "1144800000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1316901903",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 64255",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212644255"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4940 EASTERN AVE",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212242735",
            "telephone_number": "410-550-7008"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ALFERT",
        "first_name": "HAROLD",
        "middle_name": "J",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-04-12",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208800000X",
            "taxonomy_group": "",
            "desc": "Urology",
            "state": "MD",
            "license": "D37525",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Baltimore, MD

Sources for this page

  • 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.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.