2026 NPPES data Pharmacist NPI 1558643429 PHARMD
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GWYN ADAMS, PHARMD

Pharmacist in WEST LINN, Oregon. 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
16
Medicare Part D claims · 14 beneficiaries · Pharmacist avg: 135
Generic prescribing
0%
generic claims · 100% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: GWYN ADAMS, PHARMD is a Pharmacist ([object Object]) practicing in WEST LINN, Oregon with a Medicare Part D prescribing footprint of 16 claims across 14 beneficiaries — 100% brand-name prescribing .

What stands out: GWYN ADAMS, PHARMD filed 16 Medicare Part D claims in 2023 across WEST LINN, Oregon. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

GWYN ADAMS, PHARMD at a glance

Quality data not reported

NPI registry status

Active

Issued 09/15/2011

NPI 1558643429

Primary specialty

Pharmacist

High-volume

290,447 US NPIs in this specialty

Medicare Part D claims

16 88% vs specialty avg

2023 prescription claims

Specialty avg: 135

Specialty distribution in Oregon

How Pharmacist compares to other specialties among Oregon providers

Oregon providers

Pharmacist share within Oregon

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (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).

GWYN ADAMS, PHARMD is a Pharmacist provider practicing in WEST LINN, Oregon, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PHARMD. NPI: 1558643429. 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.

GWYN ADAMS, PHARMD appears in the CMS NPPES registry as a Pharmacist provider holding PHARMD credentials at 21280 SERANGO DR, WEST LINN, OR, 97068, with a listed phone of (503) 557-7689. NPI 1558643429 was issued on 09/15/2011. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ADAMS 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 16 prescription claims written by this provider, covering 14 Medicare beneficiaries and totaling roughly $3K in drug spend, split 100% brand-name and 0% generic by claim count. 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.

Pharmacist is a high-volume specialty nationwide, with 290,447 enrolled providers across 56 states and an average of 135 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

21280 SERANGO DR
WEST LINN, OR 97068

Provider Details

NPI 1558643429
Specialty Pharmacist
Credentials PHARMD
Gender Female
NPI Issued 09/15/2011

Brand vs generic prescribing mix · Brand-heavy

GWYN ADAMS, PHARMD — brand share 100.0%
Specialty average (est.)

100% brand-name claims vs 0% generic, on 16 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

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

16
Total Claims
$3K
Total Drug Cost
14
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
16
Total Day Supply
16
Brand vs Generic
100% brand / 0% generic
Brand Drug Cost
$3K
Generic Drug Cost
$0

Patient Demographics

Average Patient Age
75.4 years
Avg HCC Risk Score
1.40

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Shingrix
Varicella-Zoster Ge/As01b/Pf
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Pharmacist Overview

How GWYN ADAMS, PHARMD fits within the Pharmacist landscape nationally.

290,447
Pharmacist Providers in US
56
States with Pharmacist
135
Avg Claims per Provider

GWYN ADAMS, PHARMD's 16 claims are below the specialty average of 135.

Nearby Pharmacist Providers in Oregon

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

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

Frequently Asked Questions

What is GWYN ADAMS, PHARMD's specialty?
GWYN ADAMS, PHARMD specializes in Pharmacist and practices in WEST LINN, Oregon. Credentials: PHARMD.
How much does GWYN ADAMS, PHARMD prescribe under Medicare Part D?
In 2023, GWYN ADAMS, PHARMD wrote 16 Medicare Part D claims totaling $3K in drug costs for 14 beneficiaries.
Where is GWYN ADAMS, PHARMD located?
GWYN ADAMS, PHARMD is located at 21280 SERANGO DR, WEST LINN, OR, 97068. Phone: (503) 557-7689.
What is GWYN ADAMS, PHARMD's NPI number?
GWYN ADAMS, PHARMD's National Provider Identifier (NPI) is 1558643429, issued on 09/15/2011.
Does GWYN ADAMS, PHARMD prescribe more brand-name or generic drugs?
GWYN ADAMS, PHARMD's prescribing is 100% brand-name and 0% generic drugs by claim count, with $3K in brand drug costs.
How many Pharmacist providers are there in the US?
There are 290,447 Pharmacist providers across 56 states in the US. The average Pharmacist provider writes 135 Medicare Part D claims per year.
What drugs does GWYN ADAMS, PHARMD prescribe most often?
Based on 2023 Medicare Part D data, GWYN ADAMS, PHARMD's most frequently prescribed drugs include Shingrix. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does GWYN ADAMS, PHARMD accept Medicare?
GWYN ADAMS, PHARMD appears in CMS Medicare data with 16 Part D claims and 14 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GWYN ADAMS, PHARMD's credentials?
GWYN ADAMS, PHARMD's NPI is 1558643429 with credentials PHARMD. 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