Casey Treis, PHARM D.
Pharmacist · Great Falls, MT
Casey Treis, PHARM D. is a pharmacist with a practice address in Great Falls, Montana, and NPI 1922320720, issued on Feb 19, 2010. Check the license (Montana 6011, as entered in NPPES) with the Montana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Casey Treis
- Credential
- PHARM D.
- Primary taxonomy
- Pharmacist 183500000X
- License number
- 6011 MT
Self-reported in NPPES; status is on the state search - Practice location
- 1000 3RD St NW, Great Falls, MT 59404
- Phone
- (406) 453-6107
- Enumerated
- Feb 19, 2010
- Record last updated
- Feb 19, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (406) 771-7202
- Entity
- Type 1 · individual
8 nearest pharmacist records → All 1,087 in Montana → Look up another NPI →
Also registered at 1000 3RD St NW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Carrie SkeltonPharmacist1912239153
Verify Casey Treis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Montana board licenses this profession
Search for license 6011Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 94% of the cost of the top drugs
118 Medicare Part D claims for 104 beneficiaries, against an average of 119 among the 28,524 providers of this specialty who prescribed in Part D. Brand-name drugs were 100% of claims.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Shingrix44 claims
- Arexvy42 claims
- Boostrix Tdap22 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Casey Treis among 1,087 pharmacist records in Montana
Casey Treis, PHARM D. is one of 1,087 pharmacist records with a practice address in Montana. 19% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 22% of them.
- NPI issued2010 · 22% of these records are older, 72% newer
- In a Medicare fileYes · 19% of these records are
- In the CMS Doctors and Clinicians fileNo · 0% of these records are
- Record last updated2010 · 71% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 183500000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
88 pharmacist records list a practice address in Great Falls
They are 88 of the 1,798 NPPES records with a practice address in Great Falls, and 1,087 pharmacist records in Montana.
All 1,087 in Montana → Every provider in Great Falls → Pharmacist nationwide →
The 8 pharmacist records with the nearest ZIP codes
- James DunhamGreat Falls, MT 594041134497019
- Andrew Gawlikowski, PHARMDGreat Falls, MT 594041881920197
- Steve Griessmer, RPHGreat Falls, MT 594041699199646
- Steven Hinkle, R.PH.Great Falls, MT 594041851597850
- Tanya Hitchcock, PHARMDGreat Falls, MT 594041508289851
- Benjamin HoustonGreat Falls, MT 594041932502499
- Colleen Johnson, RPHGreat Falls, MT 594041255748414
- Jacquelyn Moore, PHARM.D.Great Falls, MT 594041578819728
Common questions
What is Casey Treis, PHARM D.'s NPI number?
Casey Treis, PHARM D.'s National Provider Identifier (NPI) is 1922320720, issued on Feb 19, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Casey Treis, PHARM D. located?
The NPPES record lists a practice address at 1000 3RD St NW, Great Falls, MT, 59404. Phone: (406) 453-6107. Providers update this record themselves, so call before visiting.
How can I verify Casey Treis, PHARM D.'s license?
NPPES lists Montana license number 6011, as entered by the provider. Search the Montana board that licenses this profession; the NPPES record confirms identity only.
How much does Casey Treis, PHARM D. prescribe under Medicare Part D?
In 2024, Casey Treis, PHARM D. had 118 Medicare Part D claims for 104 beneficiaries; the average among pharmacist prescribers was 119. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.