2026 NPPES data Pharmacotherapy Pharmacist NPI 1891769170 RPH
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MARK STEWART, RPH

Pharmacotherapy Pharmacist in OLYMPIA, Washington. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
23
Medicare Part D claims · Pharmacotherapy Pharmacist avg: 397

What the federal data shows

MARK STEWART, RPH filed 23 Medicare Part D claims in 2023 as a Pharmacotherapy Pharmacist in OLYMPIA, Washington.

23
Part D claims, 2023

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

MARK STEWART, RPH's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

23 0th percentile higher than 0% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). This entry sits in this band. 200–400: 182,923 prescribers (13%). Above this entry. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

What does the federal data show about MARK STEWART, RPH?

Quality data not reported

NPI registry status

Active

Issued 02/14/2006

NPI 1891769170

Primary specialty

Pharmacotherapy Pharmacist

Mid-sized

5,925 US NPIs in this specialty

Medicare Part D claims

23 94% vs specialty avg

2023 prescription claims

Specialty avg: 397

Specialty distribution in Washington

How Pharmacotherapy Pharmacist compares to other specialties among Washington providers

Washington providers

Pharmacotherapy Pharmacist share within Washington

1. Pharmacotherapy Pharmacist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Pharmacotherapy Pharmacist share within Washington

Specialty board-certification context

Estimated specialty board-certified rate — Pharmacotherapy Pharmacist (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Pharmacotherapy Pharmacist ABMS/AOA estimate

Est. board-certified rate (Pharmacotherapy Pharmacist) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Pharmacotherapy Pharmacist) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

MARK STEWART, RPH is a Pharmacotherapy Pharmacist provider practicing in OLYMPIA, Washington, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: RPH. NPI: 1891769170. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

MARK STEWART, RPH appears in the CMS NPPES registry as a Pharmacotherapy Pharmacist provider holding RPH credentials at 700 LILLY RD NE, OLYMPIA, WA, 98506, with a listed phone of (360) 923-7000. NPI 1891769170 was issued on 02/14/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what STEWART most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 23 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $695 in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Pharmacotherapy Pharmacist is a mid-sized specialty nationwide, with 5,925 enrolled providers across 53 states and an average of 397 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

700 LILLY RD NE
OLYMPIA, WA 98506

Provider Details

NPI 1891769170
Specialty Pharmacotherapy Pharmacist
Credentials RPH
Gender Male
NPI Issued 02/14/2006

License & disciplinary context — Washington WMC 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~34K Washington medical licensees in 2023 — they are NOT specific to MARK STEWART, RPH. To verify MARK STEWART, RPH's current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases

WMC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

23
Total Claims
$695
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
57
Total Day Supply
1,710
Generic Drug Cost
$279

Patient Demographics

Average Patient Age
70.9 years
Avg HCC Risk Score
1.49

Pharmacotherapy Pharmacist Overview

How MARK STEWART, RPH fits within the Pharmacotherapy Pharmacist landscape nationally.

5,925
Pharmacotherapy Pharmacist Providers in US
53
States with Pharmacotherapy Pharmacist
397
Avg Claims per Provider

MARK STEWART, RPH's 23 claims are below the specialty average of 397.

Nearby Pharmacotherapy Pharmacist Providers in Washington

Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as STEWART.

Compare Pharmacotherapy Pharmacist nationally: see state-by-state distribution →

Frequently Asked Questions

What is MARK STEWART, RPH's specialty?
MARK STEWART, RPH specializes in Pharmacotherapy Pharmacist and practices in OLYMPIA, Washington. Credentials: RPH.
How much does MARK STEWART, RPH prescribe under Medicare Part D?
In 2023, MARK STEWART, RPH wrote 23 Medicare Part D claims totaling $695 in drug costs for N/A beneficiaries.
Where is MARK STEWART, RPH located?
MARK STEWART, RPH is located at 700 LILLY RD NE, OLYMPIA, WA, 98506. Phone: (360) 923-7000.
What is MARK STEWART, RPH's NPI number?
MARK STEWART, RPH's National Provider Identifier (NPI) is 1891769170, issued on 02/14/2006.
How many Pharmacotherapy Pharmacist providers are there in the US?
There are 5,925 Pharmacotherapy Pharmacist providers across 53 states in the US. The average Pharmacotherapy Pharmacist provider writes 397 Medicare Part D claims per year.
Does MARK STEWART, RPH accept Medicare?
MARK STEWART, RPH appears in CMS Medicare data with 23 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARK STEWART, RPH's credentials?
MARK STEWART, RPH's NPI is 1891769170 with credentials RPH. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology