Louis Hammerman, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

25MA03896400 Issued in NJ

Practice address

360 Hawkins PL
Boonton, NJ 07005-1128

Phone

(973) 334-3006

Fax

(973) 402-9778

NPI assigned

Jul 19, 2005

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 3

Medicare fee-for-service enrollment

Enrolled in NJ

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

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.

• Prime Healthcare Services - Saint Clare'S LLC

  • General Acute Care Hospital
  • Denville, NJ
  • NPI 1497134274
  Medicare reassignment NPD
• Prime Healthcare Services - Saint Clare'S LLC

  • Psychiatric Hospital Unit
  • Boonton Township, NJ
  • NPI 1902286172
  NPD

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

{
    "created_epoch": "1121731200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1194724310",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "360 HAWKINS PL",
            "city": "BOONTON",
            "state": "NJ",
            "postal_code": "070051128",
            "telephone_number": "973-334-3006",
            "fax_number": "973-402-9778"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "360 HAWKINS PL",
            "city": "BOONTON",
            "state": "NJ",
            "postal_code": "070051128",
            "telephone_number": "973-334-3006",
            "fax_number": "973-402-9778"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HAMMERMAN",
        "first_name": "LOUIS",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-07-19",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NJ",
            "license": "25MA03896400",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "USHC",
            "identifier": "78371",
            "state": null
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1952901",
            "state": "NJ"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CIGNA",
            "identifier": "412270M",
            "state": "NJ"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Kathryn A Griffiths, MSW, LCSW
• Growing With the Seasons
• Yessenia Guglielmi, MA
• Anna Haber, LCSW
• Theresa Haljean
• John W. Hargreaves, MA, MED, NCC
• Kamari Harrington
• Daniel Harris, LCADC, LPC
• Mackenzie Hascup
• Ali Hassanzadeh

• Internal Medicine Physician in Boonton, NJ
• Providers in Boonton, NJ by specialty
• Internal Medicine Physician in New Jersey

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

Verify at the official NPI Registry.