Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Walter Grenell Jr., DO

Individual provider Emergency Medical Services (Emergency Medicine) Physician · NPI 1669714994

Walter Grenell Jr., DO practises Emergency Medicine in Wheat Ridge, Colorado. Qualified in 2013, 13 years ago. Practices with Hawaii Emergency Physicians Associated Inc, a 115-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Alaska, Colorado and Texas.

Years since qualifying
13
Licensed in
AK, CO, TX
In the registry since
2013
Specialties on file
3
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

8300 W 38th Ave
Wheat Ridge, CO 80033-6005
Phone: (303) 425-4500
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 250 Hospital Pl, Soldotna, AK 99669-6999 — (907) 714-4444

Specialties & licences

Emergency Medical Services (Emergency Medicine) Physician (primary) Taxonomy 207PE0004X · Licence 0056486 (CO)
Emergency Medical Services (Emergency Medicine) Physician Taxonomy 207PE0004X · Licence 200431 (AK)
Emergency Medicine Physician Taxonomy 207P00000X · Licence W0917 (TX)

Record details

NPI number1669714994
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 25, 2013
Last updated in NPPESSeptember 23, 2025
Certification dateSeptember 23, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice Hawaii Emergency Physicians Associated Inc — 115 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients157
Services billed 262 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Bsa Hospital Hospital · Amarillo, TX · listed as Bsa Hospital LLC

Colleagues at Hawaii Emergency Physicians Associated Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 115 clinicians in the practice; 12 are shown here.

Other providers in Wheat Ridge