Catherine A Gruenfelder

Primary specialty

Registered DietitianTaxonomy code 133V00000X

License

1057367 Issued in NJ

Practice address

25 Pocono Rd
Denville, NJ 07834-2954

Phone

(973) 625-7009

NPI assigned

Jan 28, 2026

Sex

Female

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

Enrolled in NJ

Enrollment records 1

Specialty

Registered Dietitian Or Nutrition Professional

Education

Other, 2014

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

State licenses

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.

• Internal Medicine of Morris County LLC

  • Internal Medicine Physician
  • Mine Hill, NJ
  • NPI 1568570489
  Medicare reassignment

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

{
    "created_epoch": "1769558400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769558400000",
    "number": "1003765363",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "66 FORD RD",
            "city": "DENVILLE",
            "state": "NJ",
            "postal_code": "078341379",
            "telephone_number": "973-983-1509"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "25 POCONO RD",
            "city": "DENVILLE",
            "state": "NJ",
            "postal_code": "078342954",
            "telephone_number": "973-625-7009"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GRUENFELDER",
        "first_name": "CATHERINE",
        "middle_name": "A",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2026-01-28",
        "last_updated": "2026-01-28",
        "certification_date": "2026-01-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "133V00000X",
            "taxonomy_group": "",
            "desc": "Dietitian, Registered",
            "state": "NJ",
            "license": "1057367",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Great Atlantic & Pacific Tea Company Inc (A & P Pharmacy)
• Green Leaf Dentistry, LLC
• Eric A Green, M.A.,FAA
• Cole Weston Greenberg, PT, DPT
• Efrem Lewis Greenfield, MD
• Prathima Guntipalli, MD
• Ishita Gupta Kaushal
• Eisha Gupta, MD
• Manvi Gupta, MD
• Ronald P Guzas, DO

• Registered Dietitian in Denville, NJ
• Providers in Denville, NJ by specialty
• Registered Dietitian in New Jersey

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 28, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• 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.