NPPES file of Aug 9, 2026

Mark Christopher Stewart, RPH

Pharmacotherapy Pharmacist · Olympia, WA

Mark Christopher Stewart, RPH is a pharmacotherapy pharmacist with a practice address in Olympia, Washington, and NPI 1891769170, issued on Feb 14, 2006. Check the license (Washington PH00020269, as entered in NPPES) with the Washington board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1891769170
Name
Mark Christopher Stewart
Credential
RPH
Primary taxonomy
Pharmacotherapy Pharmacist 1835P1200X
License number
PH00020269 WA
Self-reported in NPPES; status is on the state search
Practice location
700 Lilly RD NE, Olympia, WA 98506
Phone
(360) 923-7000
Enumerated
Feb 14, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
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 700 Lilly RD NE

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

  1. Sharon Abegg, M.D.Psychiatry Physician1437291143
  2. Mary Aesoph, AUDAudiologist1710233978
  3. Krystle Agtarap, PASurgical Physician Assistant1972907590
  4. Elizabeth Alberti, P.A.Physician Assistant1215087937
  5. Stephen Albrecht, M.D.Family Medicine Physician1538286026
  6. Amber An, DOGeriatric Medicine (Internal Medicine) Physician1538335443

Verify Mark Christopher Stewart in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Washington board licenses this profession
    Search for license PH00020269
    Check 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 Washington 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.

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91% fewer Medicare Part D claims than the average pharmacotherapy pharmacist in 2024

37 Medicare Part D claims for 15 beneficiaries, against an average of 395 among the 208 providers of this specialty who prescribed in Part D.

  1. Mark Stewart37
  2. Specialty average395

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.

Mark Christopher Stewart among 190 pharmacotherapy pharmacist records in Washington

Mark Christopher Stewart, RPH is one of 190 pharmacotherapy pharmacist records with a practice address in Washington. 15% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 11% of them.

  • NPI issued2006 · 11% of these records are older, 55% newer
  • In a Medicare fileYes · 15% of these records are
  • In the CMS Doctors and Clinicians fileNo · 0% of these records are
  • Record last updated2007 · 68% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1835P1200X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pharmacotherapy Pharmacist providers in Washington

There are 190 pharmacotherapy pharmacist records in Washington.

The 8 pharmacotherapy pharmacist records with the nearest ZIP codes

  1. Patrick Corkrey, PHARM.D.Olympia, WA 985061740697515
  2. Jennifer Ku, PHARMDOlympia, WA 985061881553469
  3. Robin Wooldridge, PHARM.D., BCPSLacey, WA 985031356709695
  4. Fred Ames, RPHOlympia, WA 985021760635908
  5. Robert Kahns, PHARM.D.Tacoma, WA 984981275549719
  6. Paul Jaquish, RPHTacoma, WA 984931639271133
  7. Dwight Wahlborg, RPHTacoma, WA 984931972608792
  8. Louis Wolfrom, R.PHTacoma, WA 984931447351572

Common questions

What is Mark Christopher Stewart, RPH's NPI number?

Mark Christopher Stewart, RPH's National Provider Identifier (NPI) is 1891769170, issued on Feb 14, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Mark Christopher Stewart, RPH located?

The NPPES record lists a practice address at 700 Lilly RD NE, Olympia, WA, 98506. Phone: (360) 923-7000. Providers update this record themselves, so call before visiting.

How can I verify Mark Christopher Stewart, RPH's license?

NPPES lists Washington license number PH00020269, as entered by the provider. Search the Washington board that licenses this profession; the NPPES record confirms identity only.

How much does Mark Christopher Stewart, RPH prescribe under Medicare Part D?

In 2024, Mark Christopher Stewart, RPH had 37 Medicare Part D claims for 15 beneficiaries; the average among pharmacotherapy pharmacist prescribers was 395. 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.