East Valley Internal Medicine PC

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

Legal business name

EAST VALLEY INTERNAL MEDICINE PC

Practice address

2081 W Frye Rd Ste 200
Chandler, AZ 85224-6279

Phone

(480) 821-3821

Fax

(877) 799-4622

NPI assigned

Oct 18, 2006

Organization subpart

No

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

Authorized official

Name

Brianna Flood

Title

Billing

Phone

(480) 821-3821

Specialties & licenses 1

Addresses

Other identifiers 1

Other names 1

• East Valley Internal Medicine PC Doing business as

Electronic endpoints 2

Medicare fee-for-service enrollment

Enrolled in AZ

Enrollment records 1

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

Locations

Interoperability endpoints

• FHIR API: https://fhir4.healow.com/fhir/r4/BFBCDA

Practitioners 5

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• April Jean Rosscup, MSN, APRN, FNP-C

  • Family Nurse Practitioner
  • Phoenix, AZ
  • NPI 1437773702
  Medicare reassignment Care Compare group NPD
• Mark Stephen Walmer, MD

  • Internal Medicine Physician
  • Chandler, AZ
  • NPI 1629166053
  Medicare reassignment Care Compare group NPD
• Christina Marie Zimmerman, NP

  • Family Nurse Practitioner
  • Phoenix, AZ
  • NPI 1982837563
  Medicare reassignment Care Compare group NPD
• Robert Edward Halligan Jr., MD

  • Addiction Medicine (Internal Medicine) Physician
  • Phoenix, AZ
  • NPI 1962516500
  Medicare reassignment NPD
• Ondrea Snyder, MS, APN

  • Family Nurse Practitioner
  • North Aurora, IL
  • NPI 1477844223
  NPD (past)

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

{
    "created_epoch": "1161129600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1755820800000",
    "number": "1104907039",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2081 W FRYE RD STE 200",
            "city": "CHANDLER",
            "state": "AZ",
            "postal_code": "852246279",
            "telephone_number": "480-821-3821",
            "fax_number": "480-857-4396"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2081 W FRYE RD STE 200",
            "city": "CHANDLER",
            "state": "AZ",
            "postal_code": "852246279",
            "telephone_number": "480-821-3821",
            "fax_number": "877-799-4622"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "EAST VALLEY INTERNAL MEDICINE PC",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-10-18",
        "last_updated": "2025-08-22",
        "certification_date": "2025-08-22",
        "status": "A",
        "authorized_official_last_name": "FLOOD",
        "authorized_official_first_name": "BRIANNA",
        "authorized_official_title_or_position": "BILLING",
        "authorized_official_telephone_number": "480-821-3821"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Internal Medicine",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "F01456",
            "state": "AZ"
        }
    ],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "billing@evimaz.net",
            "affiliation": "N",
            "address_1": "2081 W Frye Rd Ste 200",
            "city": "Chandler",
            "state": "AZ",
            "country_code": "US",
            "postal_code": "852246279",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "billing@evimaz.net",
            "affiliation": "N",
            "address_1": "2081 W Frye Rd Ste 200",
            "city": "Chandler",
            "state": "AZ",
            "country_code": "US",
            "postal_code": "852246279",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": [
        {
            "organization_name": "East Valley Internal Medicine PC",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

• East Valley Dermatology RX, LLC
• East Valley Family Physicians PLC
• East Valley Gastroenterology and Hepatology PC
• East Valley Hematologists and Oncologists
• East Valley Hospital, LLC
• East Valley Joint Clinic LLC
• East Valley Medical Associates, PLC
• East Valley Medical Associates, PLC
• East Valley Medicine PLC
• East Valley Oral Surgery,PC

• Internal Medicine Physician in Chandler, AZ
• Providers in Chandler, AZ by specialty
• Internal Medicine Physician in Arizona

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 22, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• 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.