2026 NPPES data Physician Assistant NPI 1588335509 PA-C
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KARI AYRES, PA-C

Physician Assistant in SEATTLE, 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
16
Medicare Part D claims · Physician Assistant avg: 790
What the federal data reveals: KARI AYRES, PA-C is a Physician Assistant ([object Object]) practicing in SEATTLE, Washington with a Medicare Part D prescribing footprint of 16 claims .

What stands out: KARI AYRES, PA-C filed 16 Medicare Part D claims in 2023 across SEATTLE, Washington. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

KARI AYRES, PA-C at a glance

Quality data not reported

NPI registry status

Active

Issued 09/21/2021

NPI 1588335509

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

16 98% vs specialty avg

2023 prescription claims

Specialty avg: 790

Specialty distribution in Washington

How Physician Assistant compares to other specialties among Washington providers

Washington providers

Physician Assistant share within Washington

1. Physician Assistant42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Physician Assistant share within Washington

Specialty board-certification context

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

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

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

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

KARI AYRES, PA-C is a Physician Assistant provider practicing in SEATTLE, Washington, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PA-C. NPI: 1588335509. 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.

KARI AYRES, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 4311 11TH AVE NE STE 200, SEATTLE, WA, 98105, with a listed phone of (206) 616-4001. NPI 1588335509 was issued on 09/21/2021. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what AYRES 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 N/A Medicare beneficiaries and totaling roughly $180 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.

Physician Assistant is a high-volume specialty nationwide, with 149,975 enrolled providers across 56 states and an average of 790 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

4311 11TH AVE NE STE 200
SEATTLE, WA 98105

Provider Details

NPI 1588335509
Specialty Physician Assistant
Credentials PA-C
Gender Female
NPI Issued 09/21/2021

Hospital and facility affiliations

Facilities where KARI AYRES, PA-C bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

MULTICARE HEALTH SYSTEM
TACOMA, WA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

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 KARI AYRES, PA-C. To verify KARI AYRES, PA-C'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.

16
Total Claims
$180
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
17
Total Day Supply
199
Brand Drug Cost
$0
Generic Drug Cost
$180

Patient Demographics

Average Patient Age
59.2 years
Avg HCC Risk Score
0.70

Physician Assistant Overview

How KARI AYRES, PA-C fits within the Physician Assistant landscape nationally.

149,975
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider

KARI AYRES, PA-C's 16 claims are below the specialty average of 790.

Nearby Physician Assistant Providers in Washington

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

Compare Physician Assistant nationally: see state-by-state distribution →

Frequently Asked Questions

What is KARI AYRES, PA-C's specialty?
KARI AYRES, PA-C specializes in Physician Assistant and practices in SEATTLE, Washington. Credentials: PA-C.
How much does KARI AYRES, PA-C prescribe under Medicare Part D?
In 2023, KARI AYRES, PA-C wrote 16 Medicare Part D claims totaling $180 in drug costs for N/A beneficiaries.
Where is KARI AYRES, PA-C located?
KARI AYRES, PA-C is located at 4311 11TH AVE NE STE 200, SEATTLE, WA, 98105. Phone: (206) 616-4001.
What is KARI AYRES, PA-C's NPI number?
KARI AYRES, PA-C's National Provider Identifier (NPI) is 1588335509, issued on 09/21/2021.
How many Physician Assistant providers are there in the US?
There are 149,975 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
Does KARI AYRES, PA-C accept Medicare?
KARI AYRES, PA-C appears in CMS Medicare data with 16 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 KARI AYRES, PA-C's credentials?
KARI AYRES, PA-C's NPI is 1588335509 with credentials PA-C. 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