Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. Gregory Wallis , DO

Emergency Medicine β€’ Pullman, WA

Active NPI 1790308278 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

835 Se Bishop Blvd
Pullman, WA 991635512

Call 5093322541 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

835 Se Bishop Blvd

Pullman, WA 991635512

Telephone 5093322541
Organization at the Same NPPES Address or Phone
Public Hospital District #1-A Of Whitman County Facility NPI 1366446767

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

NPPES lists 1 additional practice-address record in Parker, AZ. See the list

Source: CMS NPPES NPI Registry, practice location records; release date unavailable.

CMS Doctors and Clinicians lists 1 group name: Dhhs Ihs Phoenix Area. See the list

Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Graduation Year

2020

30-day fills

82 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$493 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.

Industry payments (Open Payments)

No Open Payments records are listed for this clinician for 2019–2025.

Guide: How to read an Open Payments record

Years since graduation

6 years (graduated 2020)

CMS Doctors and Clinicians data list 2020 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File.

NPI first issued

2020

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, β€œDoes your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Wallis has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Wallis as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Pullman and Washington

Billing and prescribing volume is not a quality rating.

Medicare Part D prescriptions

Close to the middle for clinicians listed under Emergency Medicine in Washington (2024, 753 clinicians with data). Median for this group: 81. Middle half: 37 to 147.

Too few clinicians listed under Emergency Medicine in Pullman have Medicare Part D data for 2024 to compare.

Part D drug cost

Close to the middle for clinicians listed under Emergency Medicine in Washington (2024, 753 clinicians with data). Median for this group: $643. Middle half: $263 to $1,197.

Too few clinicians listed under Emergency Medicine in Pullman have Medicare Part D data for 2024 to compare.

7 active clinicians are listed under Emergency Medicine with a practice address in Pullman, WA (1,460 in Washington).

Addresses are self-reported to NPPES and may be out of date.

Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo Β· Report an error.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D Β· Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Cephalexin Cephalexin 20 132 $113.39 20
Prednisone Prednisone 19 109 $42.59 19
Azithromycin Azithromycin 19 103 $108.44 19
Ondansetron Odt Ondansetron 13 71 $118.65 13
Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav 11 103 $109.62 β€”

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2025-08-05
Emergency Medicine Primary Specialty

NUCC Taxonomy Code: 207P00000X

License # reported to NPPES WA OP61426716

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Washington State Department of Health Provider Lookup.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - EMERGENCY MEDICINE

Medicare Enrollment ID

I20250331001867

Enrollment State Jurisdiction

TX

PECOS Control ID

8628464096

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File

Dhhs Ihs Phoenix Area

12033 Agency Rd, Parker, AZ 853447718

Phone: 9286692137

Secondary Practice Locations

12033 Agency Rd

Parker, AZ 853447718

Phone: 2896692137

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

11 listed
Dr. Hannah Bancroft , CRNA, DNP

Nurse Anesthetist, Certified Registered

NPI 1033824784

Certified Registered Nurse Anesthetist, Doctor of Nursing Practice

Anna Curet

Audiologist

NPI 1609582055
Craig Knudtson , CRNA

Nurse Anesthetist, Certified Registered

NPI 1023521457

Certified Registered Nurse Anesthetist

Gara Knudtson , DNAP, CRNA

Nurse Anesthetist, Certified Registered

NPI 1033777263

DNAP, Certified Registered Nurse Anesthetist

Dr. Guillermo Modad , MD

Internal Medicine

NPI 1588982888

Doctor of Medicine (M.D.)

Dr. Damola Olawuyi , MD

Student in an Organized Health Care Education/Training Program

NPI 1669169991

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

12 Historical Events
πŸ“
Updated Practice Location August 05, 2025

Registered at 835 SE BISHOP BLVD, PULLMAN, WA 991635512 (Tel: 5093322541)

πŸ“
Updated Practice Location July 07, 2025

Registered at 12033 AGENCY RD, PARKER, AZ 853447718 (Tel: 2896692137)

πŸ“
Updated Business Mailing Address July 07, 2025

Registered at PO BOX 95461, CLEVELAND, OH 441010033 (Tel: 9286692137)

πŸ“
Updated Practice Location August 19, 2024

Registered at 825 SE BISHOP BLVD, PULLMAN, WA 991636075 (Tel: 5093367300)

πŸ“
Updated Business Mailing Address August 19, 2024

Registered at 825 SE BISHOP BLVD, PULLMAN, WA 991636075 (Tel: 5093367300)

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) August 19, 2024

Emergency Medicine (license number reported to NPPES: WA OP61426716)

βœ…
NPI Profile Active May 19, 2020

NPI status registered as active in NPPES database

πŸ“
Practice Location (Initial Record) May 19, 2020

Registered at 1031 MCINTOSH CIR, JOPLIN, MO 648043643 (Tel: 8014555078)

πŸ“
Business Mailing Address (Initial Record) May 19, 2020

Registered at 1031 MCINTOSH CIR, JOPLIN, MO 648043643 (Tel: 8014555078)

πŸ‘€
Provider Name / Credentials (Initial Record) May 19, 2020

Recorded as GREGORY WALLIS, DO

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) May 19, 2020

Student in an Organized Health Care Education/Training Program

🟒
Initial NPI Registration & Enumeration May 19, 2020

First registered as active Individual Practitioner in NPPES Database.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1790308278
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: May 19, 2020
Last Update: August 05, 2025
Sole Proprietor: No

Other Emergency Medicine Providers in Pullman

Healthcare providers in Pullman

Mailing Address

Po Box 95461

Cleveland, OH 441010033

Phone: 9286692137

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.