William Mauricio Diaz Alvarado

Primary specialty

Hospitalist PhysicianTaxonomy code 208M00000X

License

337826 Issued in NY

Practice address

1425 Portland Ave
Rochester, NY 14621-3011

Phone

(585) 922-4000

NPI assigned

Jul 7, 2022

Sex

Male

Sole proprietor

Yes

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: No
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Hospitalist

Education

Other, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Rochester General HospitalGroup PAC ID 0244149474, 1,192 clinicians

The Unity Hospital of RochesterGroup PAC ID 9436060969, 732 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Rochester General Hospital Hospital, Rochester, NY, CCN 330125
• Unity Hospital Hospital, Rochester, NY, CCN 330226

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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.

• Rochester General Hospital

  • Family Medicine Physician
  • Rochester, NY
  • NPI 1356412712

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• The Unity Hospital of Rochester

  • General Acute Care Hospital
  • Rochester, NY
  • NPI 1760421713
  Medicare reassignment Care Compare group NPD
• Rochester General Hospital

  • General Acute Care Hospital
  • Rochester, NY
  • NPI 1255360517
  NPD
• Rochester General Hospital

  • Internal Medicine Physician
  • Rochester, NY
  • NPI 1760557656
  NPD
• The Unity Hospital of Rochester

  • General Acute Care Hospital
  • Rochester, NY
  • NPI 1457395766
  NPD

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

• The Unity Hospital of Rochester

  • Skilled Nursing Facility
  • Rochester, NY
  • NPI 1164406476

  Hospital

  Care Compare affiliation
• The Unity Hospital of Rochester

  • Mental Health Clinic/Center (Including Community Mental Health Center)
  • Rochester, NY
  • NPI 1336366822

  Hospital

  Care Compare affiliation
• The Unity Hospital of Rochester

  • General Acute Care Hospital
  • Rochester, NY
  • NPI 1457395766
  Care Compare affiliation
• The Unity Hospital of Rochester

  • General Acute Care Hospital
  • Rochester, NY
  • NPI 1477798189
  Care Compare affiliation
• The Unity Hospital of Rochester

  • Substance Use Disorder Rehabilitation Clinic/Center
  • Rochester, NY
  • NPI 1689891178

  Hospital

  Care Compare affiliation
• The Unity Hospital of Rochester

  • Substance Use Disorder Rehabilitation Hospital Unit
  • Rochester, NY
  • NPI 1730237603
  Care Compare affiliation
• The Unity Hospital of Rochester

  • General Acute Care Hospital
  • Rochester, NY
  • NPI 1760421713
  Care Compare affiliation

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

{
    "created_epoch": "1657152000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1751846400000",
    "number": "1174256176",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "100 KINGS HWY S",
            "city": "ROCHESTER",
            "state": "NY",
            "postal_code": "146175504"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1425 PORTLAND AVE",
            "city": "ROCHESTER",
            "state": "NY",
            "postal_code": "146213011",
            "telephone_number": "585-922-4000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DIAZ ALVARADO",
        "first_name": "WILLIAM",
        "middle_name": "MAURICIO",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2022-07-07",
        "last_updated": "2025-07-07",
        "certification_date": "2025-06-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "337826",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "NY",
            "license": "337826",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Randi L Diantonio, LMSW
• Lara Dias Almeidinha, MD
• Celso E Dias, M.D.
• Janene Dias, PHARMD
• Marquita Dias, MSW
• Diaz Transportation
• Carlos Antonio Diaz-Balzac, M.D., PH.D.
• Yasellyn Diaz-Vega, D.C.
• Amanda J Diaz, LCSW
• Brianna Maria Diaz, PSYD

• Hospitalist Physician in Rochester, NY
• Providers in Rochester, NY by specialty
• Hospitalist Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 7, 2025; 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.