Walter Grenell Jr, DO - Medicare Emergency Medicine in Wheat Ridge, CO

  1. Home
  2. Emergency Medicine
  3. CO
  4. Wheat Ridge
Walter Grenell Jr, DO is a medicare enrolled "Emergency Medicine - Emergency Medical Services" physician in Wheat Ridge, Colorado. He graduated from medical school in 2013 and has 13 years of diverse experience with area of expertise as Emergency Medicine. He is a member of the group practice Hawaii Emergency Physicians Associated Inc, Central Peninsula General Hospital Inc and his current practice location is 8300 W 38th Ave, Wheat Ridge, Colorado. You can reach out to his office (for appointments etc.) via phone at (303) 425-4500.

Walter Grenell Jr is licensed to practice in Colorado (license number 0056486) 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 1669714994.

Contact Information

Walter Grenell Jr, DO
8300 W 38th Ave,
Wheat Ridge, CO 80033-6005
(303) 425-4500
Not Available

Map and Direction




Physician's Profile

Full NameWalter Grenell Jr
GenderMale
SpecialityEmergency Medicine
Experience13 Years
Location8300 W 38th Ave, Wheat Ridge, 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:
  • Walter Grenell Jr graduated from medical school in 2013
  NPI Data:
  • NPI Number: 1669714994
  • Provider Enumeration Date: 03/25/2013
  • Last Update Date: 09/23/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 9830484476
  • Enrollment ID: I20190107000849

Medical Identifiers

Medical identifiers for Walter Grenell Jr such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1669714994NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207PE0004XEmergency Medicine - Emergency Medical Services 200431 (Alaska)Secondary
207PE0004XEmergency Medicine - Emergency Medical Services 0056486 (Colorado)Primary
207P00000XEmergency Medicine W0917 (Texas)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Baptist St Anthony's HospitalAmarillo, TXHospital
Central Peninsula General HospitalSoldotna, AKHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Hawaii Emergency Physicians Associated Inc2860390283118
Central Peninsula General Hospital Inc4587552575121

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. Walter Grenell Jr allows following entities to bill medicare on his behalf.
Entity NameHawaii Emergency Physicians Associated Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1801843198
PECOS PAC ID: 2860390283
Enrollment ID: O20040127001137
Entity NameKau Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1144304338
PECOS PAC ID: 7416945548
Enrollment ID: O20040601000398
Entity NameHale Ho Ola Hamakua
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1164506317
PECOS PAC ID: 7810926029
Enrollment ID: O20200304002483

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. Walter Grenell Jr 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
Walter Grenell Jr, DO
8300 W 38th Ave,
Wheat Ridge, CO 80033-6005

Ph: (303) 425-4500		Walter Grenell Jr, DO
8300 W 38th Ave,
Wheat Ridge, CO 80033-6005

Ph: (303) 425-4500

Reviews and Comments


Emergency Medicine Doctors in Wheat Ridge, CO

Dr. D Scott Miner, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 8300 W 38th Ave, Wheat Ridge, CO 80033
Phone: 303-425-2087    
Dr. Todd Henderson Bickford, MD
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 8300 W 38th Ave, Wheat Ridge, CO 80033
Phone: 303-425-2087    
Christina Louise Johnson, M.D.
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 8300 W 38th Ave, Wheat Ridge, CO 80033
Phone: 303-425-2087    
Klementyna M Breyer, MD
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 8300 W 38th Ave, Union Hospital, Wheat Ridge, CO 80033
Phone: 303-484-8404    
Dr. Steve Eric Doerr, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 8300 W 38th Ave, Wheat Ridge, CO 80033
Phone: 303-425-2087    
Ms. Flora Jeanne Waples-trefil, M.D.
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 8300 W 38th Ave, Wheat Ridge, CO 80033
Phone: 917-968-6954    
Dr. Leo Seung Kon Paik, M.D.
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 8300 W 38th Ave, Emergency Department, Wheat Ridge, CO 80033
Phone: 303-425-2087    

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.