2026 NPPES data Physician Assistant NPI 1609956671
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PETER JOHNSON

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
237
Medicare Part D claims · 29 beneficiaries · Physician Assistant avg: 790
MIPS score
93.0932/100
▲ 10 pts above national avg 83.1 · [object Object]

What the federal data shows

PETER JOHNSON reported a CMS MIPS final score of 93.0932/100 — above the 83.1 national average — and filed 237 Medicare Part D claims in 2023.

93.0932/100
MIPS score · +10 vs avg
237
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.

PETER JOHNSON's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

93 Top 29% higher than 71% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90–100: 189,403 scored providers (40%). This entry sits in this band. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023

What does the federal data show about PETER JOHNSON?

High performer (top quartile)

NPI registry status

Active

Issued 10/16/2006

NPI 1609956671

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

237 70% vs specialty avg

2023 prescription claims

Specialty avg: 790

MIPS final score

93.0932/100 9.993200000000002% pts

Exceptional band

vs 83.1 national avg

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

Medicare quality performance — MIPS

PETER JOHNSON's 2023 MIPS final score plotted against the Physician Assistant national average

High performer (top quartile)
MIPS Final Score
93.0932/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Physician Assistant) — 93.0932/100 vs national avg 83.1

0%100%National avg83%93.1%
MIPS final score (Physician Assistant) — 93.0932/100 vs national avg 83.1

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).

PETER JOHNSON appears in the CMS NPPES registry as a Physician Assistant provider at AMBULATORY CLINIC, SEATTLE, WA, 98109, with a listed phone of (206) 288-1000. NPI 1609956671 was issued on 10/16/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what JOHNSON 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 237 prescription claims written by this provider, covering 29 Medicare beneficiaries and totaling roughly $42K 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 93.0932/100 for the 2023 performance year (Quality 73.9573), compared with the national average of 83.1.

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

AMBULATORY CLINIC
SEATTLE, WA 98109

Provider Details

NPI 1609956671
Specialty Physician Assistant
Gender Male
NPI Issued 10/16/2006

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

93.0932
Final Score
Avg: 83.1
73.9573
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where PETER JOHNSON 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.

THE ASSOCIATION OF UNIVERSITY PHYSICIANS
SEATTLE, 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 PETER JOHNSON. To verify PETER JOHNSON'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.

237
Total Claims
$42K
Total Drug Cost
29
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
249
Total Day Supply
6,247
Generic Drug Cost
$12K
Antibiotic Claims
13

Patient Demographics

Average Patient Age
66.5 years
Avg HCC Risk Score
3.64
Gender Split
41% female / 59% male

Top Prescribed Drugs (Medicare Part D)

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

What PETER JOHNSON prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Acyclovir
19
Amlodipine Besylate
19
Ursodiol
19
Lorazepam
12
Fluconazole
11
Omeprazole
11
Prednisone
11

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

Physician Assistant Overview

How PETER JOHNSON fits within the Physician Assistant landscape nationally.

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

PETER JOHNSON's 237 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 JOHNSON.

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

Frequently Asked Questions

What is PETER JOHNSON's specialty?
PETER JOHNSON specializes in Physician Assistant and practices in SEATTLE, Washington.
How much does PETER JOHNSON prescribe under Medicare Part D?
In 2023, PETER JOHNSON wrote 237 Medicare Part D claims totaling $42K in drug costs for 29 beneficiaries.
What is PETER JOHNSON's Medicare quality score?
PETER JOHNSON has a CMS MIPS Final Score of 93.0932/100 (Quality: 73.9573). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is PETER JOHNSON located?
PETER JOHNSON is located at AMBULATORY CLINIC, SEATTLE, WA, 98109. Phone: (206) 288-1000.
What is PETER JOHNSON's NPI number?
PETER JOHNSON's National Provider Identifier (NPI) is 1609956671, issued on 10/16/2006.
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.
What drugs does PETER JOHNSON prescribe most often?
Based on 2023 Medicare Part D data, PETER JOHNSON's most frequently prescribed drugs include Acyclovir, Amlodipine Besylate, Ursodiol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does PETER JOHNSON accept Medicare?
PETER JOHNSON appears in CMS Medicare data with 237 Part D claims and 29 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify PETER JOHNSON's credentials?
PETER JOHNSON's NPI is 1609956671. 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.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) — 2023 performance year.
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