Dr. Gregory Wallis , DO
Emergency Medicine β’ Pullman, WA
835 Se Bishop Blvd
Pullman, WA 991635512
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Gregory Wallis is listed in NPPES under Emergency Medicine.
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NPI assigned on May 19, 2020; this date does not establish years in practice.
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Published CMS data list 82 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Cephalexin β 20 prescription fills, including refills.
- Prednisone β 19 prescription fills, including refills.
- Azithromycin β 19 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 5 records in the table Β· Guide: How to read Medicare Part D prescriber data
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Close to the middle for Part D prescriptions among clinicians listed under Emergency Medicine in Washington (2024, 753 clinicians with data). Median for this group: 81. Middle half: 37 to 147.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 11 in 2022 to 82 in 2024.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2022β2024.
Practice Location & Contact Primary Location
835 Se Bishop Blvd
Pullman, WA 991635512
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
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
2020
What Public CMS Data Show
Emergency Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
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.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
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 β by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019β2025.
Years since graduation
6 years (graduated 2020)
CMS Doctors and Clinicians data list 2020 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished 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.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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, βDoes your provider accept Medicare as full payment?β
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.
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.
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.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
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.
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.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions went from 11 in 2022 to 82 in 2024.
- 2022: 11
- 2023: 51
- 2024: 82
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30-day fills
30-day fills went from 11 in 2022 to 82 in 2024.
- 2022: 11
- 2023: 51
- 2024: 82
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Part D drug cost
Part D drug cost went from $114 in 2022 to $493 in 2024.
- 2022: $114
- 2023: $376
- 2024: $493
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.
| 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: 2025-08-05NUCC Taxonomy Code: 207P00000X
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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - EMERGENCY MEDICINE
I20250331001867
TX
8628464096
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.
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist, Doctor of Nursing Practice
Audiologist
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Nurse Anesthetist, Certified Registered
DNAP, Certified Registered Nurse Anesthetist
Internal Medicine
Doctor of Medicine (M.D.)
Student in an Organized Health Care Education/Training Program
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 835 SE BISHOP BLVD, PULLMAN, WA 991635512 (Tel: 5093322541)
Registered at 12033 AGENCY RD, PARKER, AZ 853447718 (Tel: 2896692137)
Registered at PO BOX 95461, CLEVELAND, OH 441010033 (Tel: 9286692137)
Registered at 825 SE BISHOP BLVD, PULLMAN, WA 991636075 (Tel: 5093367300)
Registered at 825 SE BISHOP BLVD, PULLMAN, WA 991636075 (Tel: 5093367300)
Emergency Medicine (license number reported to NPPES: WA OP61426716)
NPI status registered as active in NPPES database
Registered at 1031 MCINTOSH CIR, JOPLIN, MO 648043643 (Tel: 8014555078)
Registered at 1031 MCINTOSH CIR, JOPLIN, MO 648043643 (Tel: 8014555078)
Recorded as GREGORY WALLIS, DO
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Emergency Medicine Providers in Pullman
Healthcare providers in PullmanMailing Address
Po Box 95461
Cleveland, OH 441010033
Phone: 9286692137