Registry data as of Aug 27, 2026

Gretchen Dierken

Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist · Missoula, MT

Gretchen Dierken is a pharmacist clinician (phc)/ clinical pharmacy specialist with a practice address in Missoula, Montana, and NPI 1245632744, issued on Sep 16, 2014. Check the license with the Montana board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, loaded Aug 27, 2026 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1245632744
Name
Gretchen Dierken
Primary taxonomy
Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist 1835P0018X
Practice location
2510 S Reserve St, Missoula, MT 59801
Phone
(406) 721-4514
Enumerated
Sep 16, 2014
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 2510 S Reserve St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Brett CurriePharmacist1427450980
  2. Thomas Ferguson, O.D.Optometrist1043259104
  3. Rebecca Jackson, ODOptometrist1205819638
  4. Gregory Zell, O.D.Corneal and Contact Management Optometrist1679534705

Verify Gretchen Dierken in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Montana board licenses this professionCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Find the Montana license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist providers in Montana

There are 49 pharmacist clinician (phc)/ clinical pharmacy specialist records in Montana. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 49 in Montana → Every provider in Missoula →

Other pharmacist clinician (phc)/ clinical pharmacy specialist records in Montana

  1. Cory Adams, PHARMDMissoula, MT1689906885
  2. Brett Amestoy, PHARMDHelena, MT1104403369
  3. Rick Anderton, PHARMDBrowning, MT1255747903
  4. Jamie Belkowski, PHARMACISTMissoula, MT1023439874
  5. Jessica Bowermaster, PHARM.D., BCPSCrow Agency, MT1528397783
  6. Siera Boyd, PHARMDBillings, MT1679056089
  7. Cindy Brandon, PHARM DHavre, MT1710124706
  8. Kurt BrockhausenBillings, MT1356744395
  9. Nathan Caldwell, RPHBillings, MT1265107635
  10. Amber Clegg, PHARM D.Kalispell, MT1073882817

Common questions

What is Gretchen Dierken's NPI number?

Gretchen Dierken's National Provider Identifier (NPI) is 1245632744, issued on Sep 16, 2014. An NPI identifies a provider in billing; it is not a license.

Where is Gretchen Dierken located?

The NPPES record lists a practice address at 2510 S Reserve St, Missoula, MT, 59801. Phone: (406) 721-4514. Providers update this record themselves, so call before visiting.

How can I verify Gretchen Dierken's license?

Search the Montana board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.