Individual provider Active NPI

Michael Dias, MD

  • Hospitalist Physician
  • Ann Arbor, MI
National Provider Identifier
1831683556
Registry record updated Jul 16, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Hospitalist PhysicianTaxonomy code 208M00000X
License
208M00000X Issued in CA
Practice address
1500 E Medical Center Dr
Ann Arbor, MI 48109-5000
Phone
(734) 936-4000
NPI assigned
Jun 16, 2018
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 16, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Hospitalist Physician 208M00000X 208M00000X CA Primary
Internal Medicine Physician 207R00000X 4301504683 MI

Addresses

Primary practice location

1500 E Medical Center Dr
Ann Arbor, MI 48109-5000

Mailing address

521 Parnassus Ave
San Francisco, CA 94143-2206

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MI, CA2 enrollments
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 2

Enrollment IDStateProvider typePAC IDDetails
I20210511003105 MI Practitioner - Internal MedicinePractitioner - Hospitalist 8527314525 Reassigns benefits to 3 organizations
I20250731000778 CA Practitioner - Hospitalist 8527314525 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Hospitalist
Education
University of Florida College of Medicine, 2018
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices

Practice addresses (Care Compare)

1701 Divisadero St
San Francisco, CA 94115-3011
Phone (415) 476-4029

505 Parnassus Ave
San Francisco, CA 94143-2204
Phone (415) 476-4029

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Removal of tissue1-10

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
4301504683MIMDInternal Medicine Physician
208M00000XCAMDHospitalist Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Regents of the University of Michigan Internal Medicine Current Accepting new patients
UCSF Medical Group Business Services Internal Medicine CurrentSince Jul 16, 2025 Accepting new patients
Regents of the University of Michigan CurrentSince Jun 30, 2021 Accepting new patients
Regents of the University of Michigan Internal Medicine CurrentSince Jun 30, 2021 Accepting new patients
University of California San Francisco Current Accepting new patients
University of California San Francisco CurrentSince Jul 16, 2025 Accepting new patients
Chelsea Community Hospital CurrentSince Jan 1, 2022 Accepting new patients
Iha Health Service Corporation CurrentSince Jul 1, 2021 Accepting new patients
University of California San Francisco CurrentSince Jul 16, 2025 Accepting new patients
Regents of the University of California Internal Medicine CurrentSince Jul 16, 2025 Accepting new patients
Iha Health Services Corporation Current Accepting new patients
UCSF Medical Group Business Services CurrentSince Jul 16, 2025 Accepting new patients
Iha Health Services Corporation CurrentSince Jul 1, 2021 Accepting new patients
Chelsea Community Hospital CurrentSince Jan 1, 2022 Accepting new patients
Regents of the University of California Past Accepting new patients
University of California San Francisco Medical Center Past Accepting new patients

Locations

3100 San Pablo Ave
Berkeley, CA 94702
Phone (510) 985-5020

2001 The Embarcadero
Ste 1500
San Francisco, CA 94143
Phone (415) 353-1606

400 Parnassus Ave
#A632
San Francisco, CA 94143
Phone (415) 473-1000

2330 Post St
San Francisco, CA 94115
Phone (415) 502-4444

521 Parnassus Ave
San Francisco, CA 94143
Phone (415) 476-9035

505 Parnassus Ave
San Francisco, CA 94143
Phone (415) 476-9058

1500 E Medical Center Dr
Ann Arbor, MI 48109
Phone (734) 936-4280

3621 S State St
Ann Arbor, MI 48108
Phone (734) 647-5229

128 Van Buren St
Chelsea, MI 48118
Phone (734) 475-8677

775 S Main St
Chelsea, MI 48118
Phone (313) 995-3764

44428 Woodward Ave
Ste 102
Pontiac, MI 48341
Phone (734) 712-8700

5301 E Huron River Dr
Fl 10
Ypsilanti, MI 48197
Phone (734) 712-8676

Interoperability endpoints

  • Direct secure messaging: mdias436593@direct-ucsfmedicalcenter.org
  • Direct secure messaging: mdias1005120@direct.trinity-health.org

Organizations & group practices 16

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.

View all 16

Hospital & facility affiliations 2

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": "1529107200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1752624000000",
    "number": "1831683556",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "521 PARNASSUS AVE",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941432206"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1500 E MEDICAL CENTER DR",
            "city": "ANN ARBOR",
            "state": "MI",
            "postal_code": "481095000",
            "telephone_number": "734-936-4000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DIAS",
        "first_name": "MICHAEL",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-06-16",
        "last_updated": "2025-07-16",
        "certification_date": "2025-07-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "CA",
            "license": "208M00000X",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MI",
            "license": "4301504683",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Ann Arbor, MI

Sources for this page

Verify at the official NPI Registry.