Ruben Diaz, AGNP-BC, FNP-BC

Primary specialty

Adult Health Nurse PractitionerTaxonomy code 363LA2200X

License

F306708-1 Issued in NY

Practice address

1275 York Ave FL 3
New York, NY 10065-6007

Phone

(212) 639-2000

NPI assigned

Oct 25, 2013

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in NY

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Specialty

Nurse Practitioner

Education

Other, 2013

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Memorial Endocrine GroupGroup PAC ID 3476444506, 19 clinicians

North Shore-Lij Medical PCGroup PAC ID 3375701568, 6,374 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Memorial Hospital for Cancer and Allied Diseases Hospital, New York, NY, CCN 330154
• Phelps Hospital Hospital, Sleepy Hollow, NY, CCN 330261
• Northern Westchester Hospital Hospital, Mount Kisco, NY, CCN 330162

Merit-based Incentive Payment System (MIPS)

Final score

88.48 of 100Reported as group

Quality

79.07

Improvement activities

40

Cost

72.84

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Locations

Networks

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

Interoperability endpoints

• FHIR API: https://epicproxy.et0927.epichosted.com/FHIRProxy/api/FHIR/DSTU2
• Direct secure messaging: rdiaz423120@northwell.direct-ci.com
• FHIR API: https://epicproxy.et0927.epichosted.com/FHIRProxy/api/FHIR/R4/
• Direct secure messaging: rdiaz28471@mskcc.direct-ci.com

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.

• Memorial Endocrine Group

  • Endocrinology, Diabetes & Metabolism Physician
  • New York, NY
  • NPI 1558332023
  Medicare reassignment Care Compare group NPD
• North Shore-Lij Medical PC

  • Urology Physician
  • Great Neck, NY
  • NPI 1053688572
  Medicare reassignment Care Compare group NPD
• New York Society for the Relief of Ruptured & Crippled Maintaining

  • Special Hospital
  • New York, NY
  • NPI 1427496652
  Medicare reassignment NPD
• New York Society for the Relief of Ruptured & Crippled Maintaining

  • Specialist
  • Paramus, NJ
  • NPI 1417357849
  NPD
• New York Society for the Relief of Ruptured & Crippled Maintaining

  • General Acute Care Hospital
  • New York, NY
  • NPI 1598703019
  NPD (past)

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

• Memorial Hospital for Cancer and Allied Diseases

  • General Acute Care Hospital
  • New York, NY
  • NPI 1700887411
  Care Compare affiliation
• Northern Westchester Hospital Association

  • Medicare Defined Swing Bed Hospital Unit
  • Mount Kisco, NY
  • NPI 1396178356
  Care Compare affiliation
• Northern Westchester Hospital Association

  • General Acute Care Hospital
  • Mount Kisco, NY
  • NPI 1912992215
  Care Compare affiliation
• Phelps Memorial Hospital Association

  • General Acute Care Hospital
  • Sleepy Hollow, NY
  • NPI 1720185267
  Care Compare affiliation
• Ralph Lauren Center for Cancer Care and Prevention

  • Special Hospital
  • New York, NY
  • NPI 1770046351
  Care Compare affiliation
• Memorial Hospital for Cancer & Allied Diseases

  • General Acute Care Hospital
  • Basking Ridge, NJ
  • NPI 1659385474
  Care Compare affiliation
• Memorial Sloan Kettering Bergen

  • General Acute Care Hospital
  • Montvale, NJ
  • NPI 1841650330
  Care Compare affiliation
• Memorial Sloan Kettering Monmouth

  • General Acute Care Hospital
  • Middletown, NJ
  • NPI 1528428521
  Care Compare affiliation

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

{
    "created_epoch": "1382659200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1771372800000",
    "number": "1073941225",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "633 3RD AVE FL 4",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100176943",
            "telephone_number": "212-639-2000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1275 YORK AVE FL 3",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100656007",
            "telephone_number": "212-639-2000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DIAZ",
        "first_name": "RUBEN",
        "credential": "AGNP-BC, FNP-BC",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2013-10-25",
        "last_updated": "2026-02-18",
        "certification_date": "2026-02-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "NY",
            "license": "F339816-01",
            "primary": false
        },
        {
            "code": "363LA2200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Adult Health",
            "state": "NY",
            "license": "F306708-1",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Oliver Salcedo Diaz, ACNP
• Rachel Ann Diaz
• Raymond Diaz, MA, MM, MS
• Richard Diaz
• Rita Maria Diaz, M.D.
• Samantha Louise Diaz, PA-C
• Sarah Diaz, LMSW
• Stephanie Diaz, LMSW
• Stephanie Christine Diaz, LMHC
• Sujey Diaz, RN

• Adult Health Nurse Practitioner in New York, NY
• Providers in New York, NY by specialty
• Adult Health Nurse Practitioner in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 18, 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.