NPIMap

Individual provider Active NPI

Peter Mathern, M.D.

  • Medical Oncology Physician
  • Flagstaff, AZ
National Provider Identifier
1316995699
Registry record updated Mar 9, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Medical Oncology PhysicianTaxonomy code 207RX0202X
License
24332 Issued in AZ
Practice address
77 W Forest Ave
Flagstaff, AZ 86001-1479
Phone
(928) 635-7307
Fax
(928) 774-3844
NPI assigned
May 5, 2006
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Mar 9, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Hematology & Oncology Physician 207RH0003X 24332 AZ
Medical Oncology Physician 207RX0202X 24332 AZ Primary

Addresses

Primary practice location

77 W Forest Ave
Flagstaff, AZ 86001-1479

Mailing address

PO Box 749495
Atlanta, GA 30374-9495
Phone (855) 963-2100

Other identifiers 1

IdentifierTypeStateIssuer
361311MedicaidAZ

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in AZ
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20040622001104 AZ Practitioner - Medical OncologyPractitioner - Internal MedicinePractitioner - Hematology 9638154776 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Medical Oncology
Education
Other, 1990
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Arizona Oncology Associates PCGroup PAC ID 9638067911, 42 clinicians

Practice addresses (Care Compare)

77 W Forest Ave
Suite 301
Flagstaff, AZ 86001-1483
Phone (928) 635-7307

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
75 of 100Reported as individual

Merit-based Incentive Payment System (MIPS)

Final score
94.81 of 100Reported as individual
Quality
84.96
Promoting interoperability
100
Improvement activities
40

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
24332AZMDMedical Oncology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
City of Hope Medical Group of Arizona LLC Internal Medicine PastSince Aug 26, 2026 Accepting new patients
Arizona Oncology Services Inc PastSince Aug 1, 2004 Accepting new patients

Interoperability endpoints

  • Direct secure messaging: peter.mathern@aoa.ikm.direct-ci.com

Organizations & group practices 4

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.

Hospital & facility affiliations 10

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": "1146787200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773014400000",
    "number": "1316995699",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 749495",
            "city": "ATLANTA",
            "state": "GA",
            "postal_code": "303749495",
            "telephone_number": "855-963-2100",
            "fax_number": "813-321-1296"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "77 W FOREST AVE",
            "city": "FLAGSTAFF",
            "state": "AZ",
            "postal_code": "860011479",
            "telephone_number": "928-635-7307",
            "fax_number": "928-774-3844"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MATHERN",
        "first_name": "PETER",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-05",
        "last_updated": "2026-03-09",
        "certification_date": "2026-03-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "AZ",
            "license": "24332",
            "primary": false
        },
        {
            "code": "207RX0202X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Medical Oncology",
            "state": "AZ",
            "license": "24332",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "361311",
            "state": "AZ"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Flagstaff, AZ

Sources for this page

Verify at the official NPI Registry.