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2026 NPPES data Family Medicine Physician NPI 1508837378 M.D.
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Gregory Knopf, M.D.

Family Medicine Physician in Troutdale, Oregon.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in Family Medicine Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
9K
Medicare Part D claims · 670 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
89%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
97.8/100
▲ 14 pts above national avg 83.5 · Exceptional
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Gregory Knopf, M.D. reported a CMS MIPS final score of 97.8/100 - above the 83.5 national average - and filed 9,405 Medicare Part D claims in 2023.

97.8/100
MIPS score · +14 vs avg
9K
Part D claims, 2023
89%
generic prescribing
Likely
board-certified (heuristic)

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.

Federal trust snapshot

What official records show about Gregory Knopf, M.D.

Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.

  • Verified

    NPI registry status

    Active listing in the CMS National Provider Identifier Registry (NPI 1508837378), first enumerated 01/30/2006.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 9,405 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.

    Source: CMS Part D Prescriber PUF

  • Reported

    CMS quality reporting (MIPS)

    Reported a CMS MIPS final score of 97.8/100 in the Quality Payment Program — a federal quality measure, not a patient review.

    Source: CMS Quality Payment Program

  • Reported

    Board certification signal

    Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.

    Source: NUCC taxonomy + CMS participation heuristic

  • Reported

    Hospital affiliations

    1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.

    Source: CMS Care Compare

  • Not in federal data

    Individual sanction lookup

    PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.

    Source: State medical board / FSMB

This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.

CMS NPPES provider registry desk

NPI 1508837378 · Family Medicine Physician

NPI-10 · ENUM-LEGACY · TAX-MEGA · MIPS-ELITE · RX-MID · BOOK-LIGHT · PHOTO-FINISH

  • NPI-10 1508837378
  • ENUM-LEGACY 2006
  • TAX-MEGA 148K Family Medicine
  • MIPS-ELITE 97.8/100
  • RX-MID 9,405
  • BOOK-LIGHT 2,650 in Oregon
  • PHOTO-FINISH Leonard Bertheau · ±0.0

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

Gregory Knopf, M.D.'s MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

98 ≥ 84th percentile 84% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). Below this entry. 30–40: 2,746 measured providers (1%). Below this entry. 40–50: 2,928 measured providers (1%). Below this entry. 50–60: 5,882 measured providers (1%). Below this entry. 60–70: 13,906 measured providers (3%). Below this entry. 70–80: 94,570 measured providers (21%). Below this entry. 80–90: 129,887 measured providers (29%). Below this entry. 90+: 189,403 measured providers (42%). This entry sits in this band. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured 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.

The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Gregory Knopf, M.D. sits

This provider among family medicine physician peers

Across the 21,266 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Gregory Knopf, M.D. writes more Part D claims than 87% of them and scores higher on MIPS quality than 91% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 35Gregory Knopf, M.D., Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 91
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one family medicine physician peer from a representative sample of 60; the gold marker is Gregory Knopf, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Gregory Knopf, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about Gregory Knopf, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 01/30/2006

NPI 1508837378

Primary specialty

Family Medicine Physician

High-volume

147,760 US NPIs in this specialty

Medicare Part D claims

9,405 175% vs specialty avg

2023 prescription claims

Specialty avg: 3,418

MIPS final score

97.8/100 14.3 pts vs avg

Exceptional band

vs 83.5 national avg

Specialty distribution in Oregon

How Family Medicine Physician compares to other specialties among Oregon providers

Oregon providers
Mental Health Counselor12.1%Massage Therapist4.8%Counselor3.9%Addiction (Substance Use Dis…3.5%Case Manager/Care Coordinator3.4%Clinical Social Worker3.3%Family Medicine Physician2.2%
Largest specialties in Oregon (% of in-state providers)

Medicare quality performance, MIPS

Gregory Knopf, M.D.'s 2023 MIPS final score plotted against the Family Medicine Physician national average

High performer (top quartile)
MIPS Final Score
97.8/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%97.8%
MIPS final score (Family Medicine Physician) - 97.8/100 vs national avg 83.5
How MIPS and board certification work

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).

Practice Address

1700 SW 257TH AVE
Troutdale, OR 97060
(503) 669-6800

Provider Details

NPI 1508837378
Specialty Family Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 01/30/2006

CMS Quality Score (MIPS)

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

97.83
Final Score
Measured-score avg: 83.5
80.9759
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where Gregory Knopf, M.D. 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.

Portland Adventist Medical Center
Troutdale, OR

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

Brand vs generic prescribing mix · Typical

Gregory Knopf, M.D. - brand share 10.0%
Family Medicine Physician average

10% brand-name claims vs 89% generic, on 9,405 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.

9,405
Total Claims
$847K
Total Drug Cost
670
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
21,021
Total Day Supply
617,122
Brand vs Generic
10% brand / 89% generic
Brand Drug Cost
$657K
Generic Drug Cost
$188K
Opioid Claims
421 (4.5% rate)
Antibiotic Claims
105

Patient Demographics

Average Patient Age
73.4 years
Avg HCC Risk Score
0.95
Gender Split
37% female / 63% male
Age Distribution
<65: 48, 65-74: 340, 75-84: 227, 85+: 55

Top Prescribed Drugs (Medicare Part D)

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

What Gregory Knopf, M.D. 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
Atorvastatin Calcium
 475
Levothyroxine Sodium
 463
Metformin Hcl
 270
Irbesartan
 264
Lisinopril
 235
Omeprazole
 225
Amlodipine Besylate
 222
Hydrochlorothiazide
 204
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
198
Tamsulosin Hcl
 192

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

More Family Medicine Physician in OR → All providers in Oregon → Compare specialties →

Family Medicine Physician Overview

How Gregory Knopf, M.D. fits within the Family Medicine Physician landscape nationally.

147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider

Gregory Knopf, M.D.'s 9,405 claims are above the specialty average of 3,418.

Nationwide Family Medicine Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Knopf, both outside Oregon so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (97.8 here).

Leonard Bertheau 97.8 RI Nathan Cutshall 97.8 NC Ladonna Robey 97.8 WA Joe Skariah 97.8 WA

Same NPPES enumeration year (2006)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Peter Katsufrakis Philadelphia, PA Peter Paul Riverside, CA David Gasperack Leola, PA Jason Lotkowski Swedesboro, NJ

Nearby Family Medicine Physician Providers in Oregon

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

One of 2,650 Family Medicine Physician providers enrolled in Oregon, 5 are shown here.

Dr. Roxana Abbott
DO
Portland, OR
Dr. David Abdun-Nur
M.D.
Grants Pass, OR
Dr. Traci Ackron
D.O.
Hillsboro, OR
Dr. Orlando Acosta
MD
Hood River, OR
Dr. Michele Adamcak
D.O.
Tigard, OR

Compare Family Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Gregory Knopf, M.D.'s specialty? ▼
Gregory Knopf, M.D. specializes in Family Medicine Physician and practices in Troutdale, Oregon. Credentials: M.D..
How much does Gregory Knopf, M.D. prescribe under Medicare Part D? ▼
In 2023, Gregory Knopf, M.D. wrote 9,405 Medicare Part D claims totaling $847K in drug costs for 670 beneficiaries.
What is Gregory Knopf, M.D.'s Medicare quality score? ▼
Gregory Knopf, M.D. has a CMS MIPS Final Score of 97.8/100 (Quality: 81). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Gregory Knopf, M.D. located? ▼
Gregory Knopf, M.D. is located at 1700 SW 257TH AVE, Troutdale, OR, 97060. Phone: (503) 669-6800.
What is Gregory Knopf, M.D.'s NPI number? ▼
Gregory Knopf, M.D.'s National Provider Identifier (NPI) is 1508837378, issued on 01/30/2006.
Does Gregory Knopf, M.D. prescribe more brand-name or generic drugs? ▼
Gregory Knopf, M.D.'s prescribing is 10% brand-name and 89% generic drugs by claim count, with $657K in brand drug costs.
Does Gregory Knopf, M.D. prescribe opioids? ▼
Yes, Gregory Knopf, M.D. had 421 opioid claims in 2023 with an opioid prescribing rate of 4.5%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does Gregory Knopf, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Gregory Knopf, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gregory Knopf, M.D. accept Medicare? ▼
Gregory Knopf, M.D. appears in CMS Medicare data with 9,405 Part D claims and 670 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Knopf, M.D.'s credentials? ▼
Gregory Knopf, M.D.'s NPI is 1508837378 with credentials M.D.. 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

View source datasets and methodology notes
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

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.