Howard A Greller, MD

Primary specialty

Medical Toxicology (Emergency Medicine) PhysicianTaxonomy code 207PT0002X

License

25MA11394200 Issued in NJ

Practice address

150 Bergen St Dept of
Newark, NJ 07103-2496

Phone

(973) 972-9280

NPI assigned

Oct 10, 2006

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 6

Addresses

Other identifiers 1

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

Specialty

Emergency MedicineAlso: Addiction Medicine, Medical Toxicology

Education

New York University School of Medicine, 1998

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

University Physician Associates of New Jersey IncGroup PAC ID 9830003417, 374 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• The University Hospital Hospital, Newark, NJ, CCN 310119

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.

• University Physician Associates of New Jersey Inc

  dba University Surgical Associates

  • Surgery Physician
  • Newark, NJ
  • NPI 1639189236

  Emergency Medicine

  Medicare reassignment Care Compare group NPD
• University Physician Associates of New Jersey Inc

  dba University Medical Associates

  • Internal Medicine Physician
  • Newark, NJ
  • NPI 1760492367

  Emergency Medicine

  NPD
• St Lukes Roosevelt Hospital Center

  dba Emergency Medicine Associates of SLR

  • Emergency Medicine Physician
  • New York, NY
  • NPI 1134211717
  NPD (past)

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

• University Hospital

  • General Acute Care Hospital
  • Newark, NJ
  • NPI 1215998323
  Care Compare affiliation

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

{
    "created_epoch": "1160438400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784160000000",
    "number": "1376631085",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "150 BERGEN ST DEPT OF",
            "city": "NEWARK",
            "state": "NJ",
            "postal_code": "071032496",
            "telephone_number": "973-972-9280"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "150 BERGEN ST DEPT OF",
            "city": "NEWARK",
            "state": "NJ",
            "postal_code": "071032496",
            "telephone_number": "973-972-9280"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GRELLER",
        "first_name": "HOWARD",
        "middle_name": "A",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-10-10",
        "last_updated": "2026-07-16",
        "certification_date": "2026-07-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "NJ",
            "license": "25MA11394200",
            "primary": false
        },
        {
            "code": "2083A0300X",
            "taxonomy_group": "",
            "desc": "Preventive Medicine, Addiction Medicine",
            "state": "NY",
            "license": "61-20314",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "NY",
            "license": "224207",
            "primary": false
        },
        {
            "code": "2083A0300X",
            "taxonomy_group": "",
            "desc": "Preventive Medicine, Addiction Medicine",
            "state": "NJ",
            "license": "25MA11394200",
            "primary": false
        },
        {
            "code": "207PT0002X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine, Medical Toxicology",
            "state": "NY",
            "license": "224207",
            "primary": false
        },
        {
            "code": "207PT0002X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine, Medical Toxicology",
            "state": "NJ",
            "license": "25MA11394200",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "LICENSE",
            "identifier": "224207",
            "state": "NY"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Beth Ilene Greenberg, M.D.
• Greenbook Health & Wellness (GBK Health & Wellness)
• Kareem Greene
• Andrea Greenspan, PT
• Yonatan Yosef Greenstein, M.D.
• Tonique M Griffin
• Albert Roger Griffith, EDD
• Melissa J Grigsby, MD
• Margery Alice Grimm Defranco, MA LRC
• Jenna Grimshaw, PA-C

• Emergency Medicine Physician in Newark, NJ
• Providers in Newark, NJ by specialty
• Emergency Medicine Physician in New Jersey

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 16, 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.