PETER MATHERN M.D.
NPI 1316995699
Internal Medicine - Medical Oncology in Flagstaff, AZ

Active since May 05, 2006PECOS EnrolledAccepts Medicare Assignment
75/100
CMS Quality Rating
77 W FOREST AVE, FLAGSTAFF, AZ 86001(928) 635-7307(928) 774-3844 Get Directions Write a Review

NPPES record last updated: March 9, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Mar 9, 2026, Jul 1, 2024, Apr 29, 2024 and 4 more (7 updates tracked since 2020).

About Peter Mathern M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

PETER MATHERN M.D. (NPI 1316995699) is an individual medical oncology provider in Flagstaff, Arizona, licensed in Arizona (24332) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1990).

NPPES Registry Identity

NPI1316995699
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NamePETER MATHERNCredential: M.D.
Location Address77 W FOREST AVEFlagstaff, AZ 86001-1479
Mailing AddressPo Box 749495Atlanta, GA 30374-9495 · (855) 963-2100 · Fax (813) 321-1296
Fax(928) 774-3844
Sole ProprietorNo
Medical School CMSOtherGraduated 1990
Enumeration DateMay 5, 2006
Last NPPES UpdateMarch 9, 20267 updates tracked since enumeration
NPPES CertifiedMarch 9, 2026
NPI 1316995699 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License Licensed in AZ · 24332
Definition

An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.

Also ListedInternal Medicine · Hematology & OncologyTaxonomy 207RH0003X · License 24332 (AZ)
77 W FOREST AVE, Flagstaff, AZ 86001

Other Identifiers 1

Medicaid361311AZ

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Peter Mathern M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9638154776
PECOS Enrollment IDI20040622001104
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 35

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, daratumumab, 10 mg and hyaluronidase-fihj J9144
Daratumumab and hyaluronidase-fihj is an injection administered to treat certain types of blood cancer. The medication works by targeting and killing specific cancer cells. It's often given under the skin to reduce side effects and improve patient comfort.
20,160 services13 patients
Injection, pembrolizumab, 1 mg J9271
Pembrolizumab is a medication given via injection to help your body's immune system fight certain types of cancer. It's typically administered in a hospital or clinic by a healthcare professional.
18,800 services18 patients
Injection, aprepitant, 1 mg J0185
Aprepitant injection is a medication used to prevent nausea and vomiting caused by chemotherapy. It works by blocking certain substances in the brain that trigger these symptoms. The dosage is based on your medical condition and response to treatment.
12,350 services22 patients
Injection, denosumab, 1 mg J0897
Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.
10,860 services46 patients
Injection, fosaprepitant, 1 mg J1453
Fosaprepitant is an anti-nausea medication given via injection. It's often used to prevent nausea and vomiting caused by chemotherapy. This injection blocks signals to the brain that trigger these symptoms, helping you feel better.
7,950 services12 patients
Injection, dexamethasone sodium phosphate, 1 mg J1100
Dexamethasone sodium phosphate is a medication given via injection. It is a type of steroid that helps reduce inflammation and immune responses. It can be used to treat a variety of conditions, such as allergies, skin conditions, arthritis, and more.
2,804 services50 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 86001 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$168.60 typical visit price
range $55.44 – $168.60
Typical copayment $42.15 (range $13.86 – $42.15)
Most-billed visit code 99205
Established Patient
$98.00 typical visit price
range $17.72 – $137.41
Typical copayment $24.50 (range $4.43 – $34.35)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

75/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Capecitabine, oral, 500 mg J8521
Treatment-Treatment - Miscellaneous · category RX029N
2 suppliers55 claims3,595 services$0.77 avg. paid by Medicare
Temozolomide, oral, 5 mg J8700
Treatment-Treatment - Miscellaneous · category RX000N
2 suppliers24 claims2,692 services$0.67 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
2 suppliers54 claims54 services$18.19 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
2 suppliers29 claims31 services$12.57 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Surgery
77 W FOREST AVE, SUITE 201
FLAGSTAFF, AZ 86001
Nurse Practitioner (Family)
77 W FOREST AVE, SUITE 301
FLAGSTAFF, AZ 86001
Nurse Anesthetist, Certified Registered
77 W FOREST AVE, SUITE 207
FLAGSTAFF, AZ 86001
Pediatrics
77 W FOREST AVE, SUITE 304
FLAGSTAFF, AZ 86001
Anesthesiology
77 W FOREST AVE, SUITE 207
FLAGSTAFF, AZ 86001
Internal Medicine (Cardiovascular Disease)
77 W FOREST AVE, SUITE 302
FLAGSTAFF, AZ 86001
Anesthesiology
77 W FOREST AVE, SUITE 207
FLAGSTAFF, AZ 86001
Pediatrics
77 W FOREST AVE, SUITE 304
FLAGSTAFF, AZ 86001

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Peter Mathern's NPI number?

The NPI number for Peter Mathern is 1316995699. It was assigned to this individual provider in the NPPES registry on May 5, 2006.

Where is Peter Mathern located?

Peter Mathern practices at 77 W Forest Ave, Flagstaff, AZ 86001. The listed phone number is (928) 635-7307.

What is Peter Mathern's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Peter Mathern enrolled in Medicare?

Yes. Peter Mathern is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Peter Mathern accept?

Health plans from Ambetter from Arizona Complete Health, Antidote Health Plan of Arizona, Inc., Blue Cross Blue Shield of Arizona, Imperial Insurance Companies, Inc. and UnitedHealthcare list Peter Mathern as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Peter Mathern was last updated on March 9, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.