Dr William Sprague Trask Iv, DO - Medicare Anesthesiology in Boulder, CO

Dr William Sprague Trask Iv, DO is a medicare enrolled "Anesthesiology" physician in Boulder, Colorado. He went to At Still University Of Health Sciences, College Of Osteo Med, Kirksville and graduated in 2006 and has 18 years of diverse experience with area of expertise as Anesthesiology. He is a member of the group practice Boulder Valley Anesthesiology, Pllc and his current practice location is 4747 Arapahoe Ave, Boulder, Colorado. You can reach out to his office (for appointments etc.) via phone at (303) 415-2532.

Dr William Sprague Trask Iv is licensed to practice in Colorado (license number 49491) 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 1184706608.

Contact Information

Dr William Sprague Trask Iv, DO
4747 Arapahoe Ave,
Boulder, CO 80303-1131
(303) 415-2532
(303) 785-1725

Map and Direction




Physician's Profile

Full NameDr William Sprague Trask Iv
GenderMale
SpecialityAnesthesiology
Experience18 Years
Location4747 Arapahoe Ave, Boulder, Colorado
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 William Sprague Trask Iv attended and graduated from At Still University Of Health Sciences, College Of Osteo Med, Kirksville in 2006
  NPI Data:
  • NPI Number: 1184706608
  • Provider Enumeration Date: 10/20/2006
  • Last Update Date: 03/02/2019
  Medicare PECOS Information:
  • PECOS PAC ID: 9638294630
  • Enrollment ID: I20160428001897

Medical Identifiers

Medical identifiers for Dr William Sprague Trask Iv such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1184706608NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207L00000XAnesthesiology OL20000111 (Washington)Secondary
207L00000XAnesthesiology OP60150344 (Washington)Secondary
207L00000XAnesthesiology 49491 (Colorado)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Boulder Community HealthBoulder, COHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Boulder Valley Anesthesiology, Pllc711383099354

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 William Sprague Trask Iv allows following entities to bill medicare on his behalf.
Entity NameBoulder Valley Anesthesiology, Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1962431668
PECOS PAC ID: 7113830993
Enrollment ID: O20031107000375

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 William Sprague Trask Iv 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 William Sprague Trask Iv, DO
Po Box 21147,
Boulder, CO 80308-4147

Ph: (303) 415-2532
Dr William Sprague Trask Iv, DO
4747 Arapahoe Ave,
Boulder, CO 80303-1131

Ph: (303) 415-2532

Reviews and Comments


Anesthesiology Doctors in Boulder, CO

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Megan Nicole Wingfield, MD
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Dr. Jordan Gozdzialski, M.D.
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Justin P Meschler, MD
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Brian S Gebhardt, M.D.
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Phone: 303-440-2273    
Richard Caffrey, MD
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Medicare: Medicare Enrolled
Practice Location: 1100 Balsam Ave, Boulder, CO 80304
Phone: 303-440-2273    

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.