Dr Gregory Wallis, DO - Medicare in Parker, AZ

Dr Gregory Wallis, DO is a medicare enrolled "Emergency Medicine" physician in Parker, Arizona. His current practice location is 12033 Agency Rd, Parker, Arizona. You can reach out to his office (for appointments etc.) via phone at (289) 669-2137.

Dr Gregory Wallis is licensed to practice in Washington (license number OP61426716) 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 1790308278.

Contact Information

Dr Gregory Wallis, DO
12033 Agency Rd,
Parker, AZ 85344-7718
(289) 669-2137
Not Available

Map and Direction




Physician's Profile

Full NameDr Gregory Wallis
GenderMale
Speciality
Experience Years
Location12033 Agency Rd, Parker, 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 Gregory Wallis attended and graduated from in
  NPI Data:
  • NPI Number: 1790308278
  • Provider Enumeration Date: 05/19/2020
  • Last Update Date: 07/07/2025
  Medicare PECOS Information:
  • PECOS PAC ID:
  • Enrollment ID:

Medical Identifiers

Medical identifiers for Dr Gregory Wallis such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1790308278NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine OP61426716 (Washington)Primary

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 Gregory Wallis 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 Gregory Wallis, DO
Po Box 95461,
Cleveland, OH 44101-0033

Ph: (928) 669-2137
Dr Gregory Wallis, DO
12033 Agency Rd,
Parker, AZ 85344-7718

Ph: (289) 669-2137

Reviews and Comments


Emergency Medicine Doctors in Parker, AZ

Dr. Paul Robert Hladon, MD
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1200 W Mohave Rd, Emergency Department, Parker, AZ 85344
Phone: 800-444-7009    Fax: 800-305-3233
Emily Veltus, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 12033 W Agency Ave, Parker, AZ 85344
Phone: 928-669-2137    
Dr. Kenneth James Westrate, M.D.
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 12033 Agency Rd, Parker, AZ 85344
Phone: 928-669-2137    Fax: 928-669-3131
Dr. Shazia Sohrawardy, DO
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 12033 Agency Rd, Parker, AZ 85344
Phone: 928-669-2137    Fax: 928-669-3131
Dr. Erik Jeff Martin, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 12033 Agency Rd, Parker, AZ 85344
Phone: 928-669-2137    Fax: 928-669-3131
Dr. Joseph Charles Proctor Sr., D.O.
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1200 W Mohave Rd, Parker, AZ 85344
Phone: 928-669-7420    

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.