NPIMap

Individual provider Active NPI

Nathaniel Kratz, M.D.

  • Internal Medicine Physician
  • New York, NY
National Provider Identifier
1639532476
Registry record updated Mar 31, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
299476 Issued in NY
Practice address
5141 Broadway
New York, NY 10034-1159
Phone
(212) 932-4461
NPI assigned
Mar 30, 2016
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Mar 31, 2026

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Hospitalist Physician 208M00000X 299476 NY
Addiction Medicine (Preventive Medicine) Physician 2083A0300X 299476 NY
Internal Medicine Physician 207R00000X 299476 NY Primary

Addresses

Primary practice location

5141 Broadway
New York, NY 10034-1159

Mailing address

630 W 168TH St # 4
New York, NY 10032-3725

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in NY
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20190802000782 NY Practitioner - Internal Medicine 7012243702 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
Other, 2015
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Trustees of Columbia University in the City of New YorkGroup PAC ID 8527972546, shared by 10 NPIs, 2,262 clinicians

Practice addresses (Care Compare)

622 W 168TH St
New York, NY 10032-3720

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
100 of 100Reported as apm
Quality
85.32
Promoting interoperability
100
Improvement activities
40

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
299476NYMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Trustees of Columbia University in the City of New York Internal Medicine CurrentSince Jun 22, 2019 Accepting new patients
Trustees of Columbia University in the City of New York Internal Medicine CurrentSince Jun 22, 2019 Accepting new patients
Trustees of Columbia University in the City of New York Internal Medicine CurrentSince Jun 22, 2019 Accepting new patients
The New York and Presbyterian Hospital Past Accepting new patients
The New York and Presbyterian Hospital Past Accepting new patients

Locations

630 W 168th St
New York, NY 10032
Phone (212) 305-1948

630 W 168th St
#4
New York, NY 10032
Phone (212) 305-6387

622 W 168th St
New York, NY 10032
Phone (212) 305-4931

161 Fort Washington Ave
New York, NY 10032
Phone (212) 305-8559

5141 Broadway
New York, NY 10034
Phone (212) 932-4000

534 W 135th St
New York, NY 10031
Phone (212) 491-2300

Networks

  • Healthfirst Medicare Network H3359
  • Healthfirst Medicare Network H9678
  • Healthfirst Medicare Network H1722
  • Healthfirst Medicare Network H5989

Interoperability endpoints

  • Direct secure messaging: nak9119@direct.nyp.org
  • FHIR API: https://epicproxy-pub.et1089.epichosted.com/FHIRProxy/api/FHIR/R4/
  • FHIR API: https://epicproxy-pub.et1089.epichosted.com/FHIRProxy/api/FHIR/DSTU2/

Organizations & group practices 5

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

Hospital & facility affiliations 5

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

NPI Registry JSON

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

{
    "created_epoch": "1459296000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1774915200000",
    "number": "1639532476",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "630 W 168TH ST # 4",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100323725"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5141 BROADWAY",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100341159",
            "telephone_number": "212-932-4461"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KRATZ",
        "first_name": "NATHANIEL",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2016-03-30",
        "last_updated": "2026-03-31",
        "certification_date": "2026-03-31",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "NY",
            "license": "299476",
            "primary": false
        },
        {
            "code": "2083A0300X",
            "taxonomy_group": "",
            "desc": "Preventive Medicine, Addiction Medicine",
            "state": "NY",
            "license": "299476",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "299476",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in New York, NY

Sources for this page

Verify at the official NPI Registry.