James O Posever, MD

Primary specialty

Rheumatology PhysicianTaxonomy code 207RR0500X

License

29356 Issued in AZ

Practice address

4212 N 16TH St
Phoenix, AZ 85016-5319

Phone

(602) 263-1200

Fax

(602) 263-1619

NPI assigned

Jun 14, 2006

Last updated

Sep 24, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in TX

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

RheumatologyAlso: Internal Medicine

Education

Northwestern University Feinberg Medical School, 1991

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Dhew Ind HLTH SV HLTH SVS and MNTL HLTH AdmGroup PAC ID 1759290901, 219 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Phoenix Indian Medical Center Hospital, Phoenix, AZ, CCN 030078

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Dhew Ind HLTH SV HLTH SVS & MNTL HLTH Adm

  dba Phoenix Indian Medical Center

  • Public Health or Welfare Agency
  • Phoenix, AZ
  • NPI 1083643738

  TX

  Medicare reassignment Care Compare group NPD
• DHHS PHS IHS Phoenix Area

  dba Ft Yuma Indian Health Center

  • Clinic/Center
  • Winterhaven, CA
  • NPI 1265719918

  TX

  Medicare reassignment NPD
• Dhew Ind HLTH SV HLTH SVS & MNTL HLTH Adm

  dba Ak-Chin Clinic

  • Public Health or Welfare Agency
  • Maricopa, AZ
  • NPI 1538043443
  NPD
• DHHS PHS Naihs Fort Defiance Hospital

  dba PHS Fort Defiance Indian Hospital

  • General Acute Care Hospital
  • Fort Defiance, AZ
  • NPI 1700962131
  NPD (past)

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

{
    "created_epoch": "1150243200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1790208000000",
    "number": "1154364214",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 95460",
            "city": "CLEVELAND",
            "state": "OH",
            "postal_code": "441010033",
            "telephone_number": "602-581-6076",
            "fax_number": "602-263-1619"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4212 N 16TH ST",
            "city": "PHOENIX",
            "state": "AZ",
            "postal_code": "850165319",
            "telephone_number": "602-263-1200",
            "fax_number": "602-263-1619"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "POSEVER",
        "first_name": "JAMES",
        "middle_name": "O",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-14",
        "last_updated": "2026-09-24",
        "certification_date": "2026-09-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RR0500X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Rheumatology",
            "state": "AZ",
            "license": "29356",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "574584",
            "state": "AZ"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• James Cook Portt, PA-C
• Brian E Portugal, O.T.
• Brian David Porvin, DO
• Elizabeth Ann Posek, RD
• Leslie H Posen, D.M.D.
• Jared Posey, RN
• Erabella Amiracle Posilippo
• Kristine Ann Posio-Molina, P.T.
• Positive Movement,LLC
• Positive Pathways BHS

• Rheumatology Physician in Phoenix, AZ
• Providers in Phoenix, AZ by specialty
• Rheumatology Physician in Arizona

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 24, 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.