2026 NPPES data Medical Physician Assistant NPI 1588808216 PA-C
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JUSTIN COLQUHOUN, PA-C

Medical Physician Assistant in VANCOUVER, 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
752
Medicare Part D claims · 202 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

JUSTIN COLQUHOUN, PA-C filed 752 Medicare Part D claims in 2023 as a Medical Physician Assistant in VANCOUVER, Washington, prescribing 90% generic.

752
Part D claims, 2023
90%
generic prescribing

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.

JUSTIN COLQUHOUN, PA-C's Medicare Part D volume vs every U.S. prescriber

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

752 Top 29% higher than 71% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). This entry sits in this band. 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 JUSTIN COLQUHOUN, PA-C?

Quality data not reported

NPI registry status

Active

Issued 04/24/2009

NPI 1588808216

Primary specialty

Medical Physician Assistant

Mid-sized

40,527 US NPIs in this specialty

Medicare Part D claims

752 30% vs specialty avg

2023 prescription claims

Specialty avg: 1,077

Specialty distribution in Washington

How Medical Physician Assistant compares to other specialties among Washington providers

Washington providers

Medical Physician Assistant share within Washington

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

Specialty board-certification context

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

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

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

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

JUSTIN COLQUHOUN, PA-C appears in the CMS NPPES registry as a Medical Physician Assistant provider holding PA-C credentials at 200 NE MOTHER JOSEPH PL, VANCOUVER, WA, 98664, with a listed phone of (360) 256-2640. NPI 1588808216 was issued on 04/24/2009. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what COLQUHOUN 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 752 prescription claims written by this provider, covering 202 Medicare beneficiaries and totaling roughly $79K in drug spend, split 10% brand-name and 90% 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.

Medical Physician Assistant is a mid-sized specialty nationwide, with 40,527 enrolled providers across 55 states and an average of 1,077 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

200 NE MOTHER JOSEPH PL
VANCOUVER, WA 98664

Provider Details

NPI 1588808216
Specialty Medical Physician Assistant
Credentials PA-C
Gender Male
NPI Issued 04/24/2009

Hospital and facility affiliations

Facilities where JUSTIN COLQUHOUN, 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.

PEACEHEALTH
VANCOUVER, 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 JUSTIN COLQUHOUN, PA-C. To verify JUSTIN COLQUHOUN, 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.

Brand vs generic prescribing mix · Typical

JUSTIN COLQUHOUN, PA-C — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 752 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.

752
Total Claims
$79K
Total Drug Cost
202
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,596
Total Day Supply
47,527
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$69K
Generic Drug Cost
$9K

Patient Demographics

Average Patient Age
76.3 years
Avg HCC Risk Score
1.89
Gender Split
47% female / 53% male

Top Prescribed Drugs (Medicare Part D)

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

What JUSTIN COLQUHOUN, PA-C 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
Clopidogrel
Clopidogrel Bisulfate
80
Carvedilol
77
Metoprolol Succinate
75
Losartan Potassium
71
Atorvastatin Calcium
48
Eliquis
Apixaban
48
Amlodipine Besylate
47
Furosemide
35
Lisinopril
32
Isosorbide Mononitrate Er
Isosorbide Mononitrate
31

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

Medical Physician Assistant Overview

How JUSTIN COLQUHOUN, PA-C fits within the Medical Physician Assistant landscape nationally.

40,527
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider

JUSTIN COLQUHOUN, PA-C's 752 claims are below the specialty average of 1,077.

Nearby Medical Physician Assistant Providers in Washington

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

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

Frequently Asked Questions

What is JUSTIN COLQUHOUN, PA-C's specialty?
JUSTIN COLQUHOUN, PA-C specializes in Medical Physician Assistant and practices in VANCOUVER, Washington. Credentials: PA-C.
How much does JUSTIN COLQUHOUN, PA-C prescribe under Medicare Part D?
In 2023, JUSTIN COLQUHOUN, PA-C wrote 752 Medicare Part D claims totaling $79K in drug costs for 202 beneficiaries.
Where is JUSTIN COLQUHOUN, PA-C located?
JUSTIN COLQUHOUN, PA-C is located at 200 NE MOTHER JOSEPH PL, VANCOUVER, WA, 98664. Phone: (360) 256-2640.
What is JUSTIN COLQUHOUN, PA-C's NPI number?
JUSTIN COLQUHOUN, PA-C's National Provider Identifier (NPI) is 1588808216, issued on 04/24/2009.
Does JUSTIN COLQUHOUN, PA-C prescribe more brand-name or generic drugs?
JUSTIN COLQUHOUN, PA-C's prescribing is 10% brand-name and 90% generic drugs by claim count, with $69K in brand drug costs.
How many Medical Physician Assistant providers are there in the US?
There are 40,527 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,077 Medicare Part D claims per year.
What drugs does JUSTIN COLQUHOUN, PA-C prescribe most often?
Based on 2023 Medicare Part D data, JUSTIN COLQUHOUN, PA-C's most frequently prescribed drugs include Clopidogrel, Carvedilol, Metoprolol Succinate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JUSTIN COLQUHOUN, PA-C accept Medicare?
JUSTIN COLQUHOUN, PA-C appears in CMS Medicare data with 752 Part D claims and 202 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JUSTIN COLQUHOUN, PA-C's credentials?
JUSTIN COLQUHOUN, PA-C's NPI is 1588808216 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