Dr John Dawson Mason, MD - Medicare Emergency Medicine in Tempe, AZ

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Dr John Dawson Mason, MD is a medicare enrolled "Emergency Medicine" physician in Tempe, Arizona. He graduated from medical school in 2000 and has 25 years of diverse experience with area of expertise as Emergency Medicine. He is a member of the group practice East Valley Ep Pllc and his current practice location is 1500 S Mill Ave, Tempe, Arizona. You can reach out to his office (for appointments etc.) via phone at (480) 784-5533.

Dr John Dawson Mason is licensed to practice in Arizona (license number 31338) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1023090099.

Contact Information

Dr John Dawson Mason, MD
1500 S Mill Ave,
Tempe, AZ 85281-6699
(480) 784-5533
Not Available

Map and Direction




Physician's Profile

Full NameDr John Dawson Mason
GenderMale
SpecialityEmergency Medicine
Experience25 Years
Location1500 S Mill Ave, Tempe, Arizona
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr John Dawson Mason graduated from medical school in 2000
  NPI Data:
  • NPI Number: 1023090099
  • Provider Enumeration Date: 11/16/2005
  • Last Update Date: 04/18/2019
  Medicare PECOS Information:
  • PECOS PAC ID: 8426944083
  • Enrollment ID: I20040223000552

Medical Identifiers

Medical identifiers for Dr John Dawson Mason such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1023090099NPI-NPPES
860373636OtherAZHUMANA GROUP
AZ0728670OtherAZBLUECROSS BLUESHIELD GRP
775471MedicaidAZ
AW1436OtherAZHEALTHNET GRP
453051001OtherAZGROUPHEALTH GRP
3981220OtherAZEVERCARE GRP

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 31338 (Arizona)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
St Luke's Medical CenterPhoenix, AZHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
East Valley Ep Pllc488008178512

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr John Dawson Mason allows following entities to bill medicare on his behalf.
Entity NameEmergency Group Of Arizona Professional Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1215275433
PECOS PAC ID: 1355596644
Enrollment ID: O20130313000442
Entity NameSteward Emergency Physicians Of Arizona Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1558827998
PECOS PAC ID: 4486995420
Enrollment ID: O20190401001375
Entity NameTec Emergency Physicians Of Arizona, Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1245772870
PECOS PAC ID: 6204256084
Enrollment ID: O20201016000157
Entity NameEast Valley Ep Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1659039618
PECOS PAC ID: 4880081785
Enrollment ID: O20220423000106
Entity NamePhoenix Emergency Physicians Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1366156259
PECOS PAC ID: 7012238934
Enrollment ID: O20230403000159
Entity NamePhoenix Physician Group Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1154898435
PECOS PAC ID: 9830556463
Enrollment ID: O20240226001151
Entity NameUsacs Of Colorado Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1235765074
PECOS PAC ID: 4981507571
Enrollment ID: O20250116003493
Entity NameUsacs Emergency Medicine Of Arizona Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1770392490
PECOS PAC ID: 7113447475
Enrollment ID: O20250218000978

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr John Dawson Mason is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr John Dawson Mason, MD
4619 E Calle Tuberia,
Phoenix, AZ 85018-2910

Ph: (480) 206-4086		Dr John Dawson Mason, MD
1500 S Mill Ave,
Tempe, AZ 85281-6699

Ph: (480) 784-5533

Reviews and Comments


Emergency Medicine Doctors in Tempe, AZ

Dr. Jeffrey W Gaver, MD
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Druce Fu, MD
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Dr. Thuan Nguyen, MD
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Phone: 480-784-5533    Fax: 480-333-5197
Perry Olliver, DO
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Stefanie R Schroeder, M.D.
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Practice Location: 451 E University Dr, Tempe, AZ 85281
Phone: 480-965-3346    Fax: 480-965-8914

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.