Dr Gary Thomas Underhill, MD - Medicare Emergency Medicine in Walla Walla, WA

Dr Gary Thomas Underhill, MD is a medicare enrolled "Emergency Medicine" physician in Walla Walla, Washington. He went to Loma Linda University School Of Medicine and graduated in 1996 and has 28 years of diverse experience with area of expertise as Emergency Medicine. He is a member of the group practice Columbia County Hospital District, Washington Emergency Physician Partners Pllc and his current practice location is 1025 S 2nd Ave, Walla Walla, Washington. You can reach out to his office (for appointments etc.) via phone at (509) 525-0480.

Dr Gary Thomas Underhill is licensed to practice in Washington (license number MD00037711) 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 1851375265.

Contact Information

Dr Gary Thomas Underhill, MD
1025 S 2nd Ave,
Walla Walla, WA 99362-4116
(509) 525-0480
(509) 527-8195

Map and Direction




Physician's Profile

Full NameDr Gary Thomas Underhill
GenderMale
SpecialityEmergency Medicine
Experience28 Years
Location1025 S 2nd Ave, Walla Walla, Washington
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 Gary Thomas Underhill attended and graduated from Loma Linda University School Of Medicine in 1996
  NPI Data:
  • NPI Number: 1851375265
  • Provider Enumeration Date: 11/30/2005
  • Last Update Date: 03/30/2017
  Medicare PECOS Information:
  • PECOS PAC ID: 1850483470
  • Enrollment ID: I20070827000624

Medical Identifiers

Medical identifiers for Dr Gary Thomas Underhill such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1851375265NPI-NPPES
1020580MedicaidWA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine MD00037711 (Washington)Secondary
207P00000XEmergency Medicine MD00037711 (Washington)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Trios HealthKennewick, WAHospital
Dayton General HospitalDayton, WAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Columbia County Hospital District559765375837
Washington Emergency Physician Partners Pllc509295181412

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 Gary Thomas Underhill allows following entities to bill medicare on his behalf.
Entity NameColumbia County Hospital District
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1134128911
PECOS PAC ID: 5597653758
Enrollment ID: O20040309000515
Entity NameWashington Emergency Physician Partners Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1346586351
PECOS PAC ID: 5092951814
Enrollment ID: O20130424000635

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 Gary Thomas Underhill 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 Gary Thomas Underhill, MD
Po Box 1398,
Walla Walla, WA 99362-0309

Ph: (509) 525-0480
Dr Gary Thomas Underhill, MD
1025 S 2nd Ave,
Walla Walla, WA 99362-4116

Ph: (509) 525-0480

Reviews and Comments


Emergency Medicine Doctors in Walla Walla, WA

Dr. Philip A Green, MD
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 401 W Poplar St, Psmmc Er, Walla Walla, WA 99362
Phone: 509-522-5802    Fax: 509-522-5541
Shirley Robin Vonhaven, DO
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 401 W Poplar, Walla Walla, WA 99362
Phone: 509-522-5802    Fax: 509-522-5950
Jared L Wutzke, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 401 W Poplar St, Psmmc Er, Walla Walla, WA 99362
Phone: 509-522-5802    Fax: 509-522-5541
Dr. Morgan C Galante, DO
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1111 S 2nd Ave, Walla Walla, WA 99362
Phone: 509-897-3700    
Joilo Barbosa, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 123 E Main St # 268, Walla Walla, WA 99362
Phone: 509-529-2966    
Aaron B Jones, MD
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 401 W Poplar St, Emergency Department, Walla Walla, WA 99362
Phone: 509-525-3320    
Eric Trent Brown, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 401 W Poplar St, Psmmc Er, Walla Walla, WA 99362
Phone: 509-522-5802    Fax: 509-522-5541

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.