2026 NPPES data Physician Assistant NPI 1033512918 P.A.
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Melissa Walsh, P.A.

Physician Assistant in Salem, 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 149,975 in Physician Assistant, 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
990
Medicare Part D claims · 257 beneficiaries · Physician Assistant avg: 790
MIPS score
97.8/100
▲ 15 pts above national avg 83.1 · Exceptional
Industry payments
$357.42
15 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Melissa Walsh, P.A. reported a CMS MIPS final score of 97.8/100 — above the 83.1 national average — and filed 990 Medicare Part D claims in 2023.

97.8/100
MIPS score · +15 vs avg
990
Part D claims, 2023
$357.42
industry payments (Sunshine Act)

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.

Melissa Walsh, P.A.'s MIPS score vs every scored U.S. clinician

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

98 Top 15% higher than 85% 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

Where Melissa Walsh, P.A. sits

This provider among physician assistant peers

Across the 27,054 physician assistant providers who report both Medicare Part D prescribing and a MIPS quality score, Melissa Walsh, P.A. writes more Part D claims than 82% of them and scores higher on MIPS quality than 89% — placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Part D claim volume vs MIPS quality, by specialty percentile

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality02550751000255075100Part D claim volume — percentile in specialtyMIPS quality — percentilePart D claim volume — percentile in specialty: 35 · MIPS quality — percentile: 35Part D claim volume — percentile in specialty: 58 · MIPS quality — percentile: 5Part D claim volume — percentile in specialty: 53 · MIPS quality — percentile: 13Part D claim volume — percentile in specialty: 98 · MIPS quality — percentile: 10Part D claim volume — percentile in specialty: 72 · MIPS quality — percentile: 93Part D claim volume — percentile in specialty: 0 · MIPS quality — percentile: 43Part D claim volume — percentile in specialty: 97 · MIPS quality — percentile: 50Part D claim volume — percentile in specialty: 65 · MIPS quality — percentile: 33Part D claim volume — percentile in specialty: 48 · MIPS quality — percentile: 70Part D claim volume — percentile in specialty: 88 · MIPS quality — percentile: 38Part D claim volume — percentile in specialty: 83 · MIPS quality — percentile: 65Part D claim volume — percentile in specialty: 67 · MIPS quality — percentile: 77Part D claim volume — percentile in specialty: 23 · MIPS quality — percentile: 62Part D claim volume — percentile in specialty: 25 · MIPS quality — percentile: 72Part D claim volume — percentile in specialty: 60 · MIPS quality — percentile: 20Part D claim volume — percentile in specialty: 28 · MIPS quality — percentile: 32Part D claim volume — percentile in specialty: 55 · MIPS quality — percentile: 15Part D claim volume — percentile in specialty: 7 · MIPS quality — percentile: 48Part D claim volume — percentile in specialty: 87 · MIPS quality — percentile: 58Part D claim volume — percentile in specialty: 30 · MIPS quality — percentile: 98Part D claim volume — percentile in specialty: 15 · MIPS quality — percentile: 80Part D claim volume — percentile in specialty: 68 · MIPS quality — percentile: 12Part D claim volume — percentile in specialty: 95 · MIPS quality — percentile: 57Part D claim volume — percentile in specialty: 73 · MIPS quality — percentile: 28Part D claim volume — percentile in specialty: 7 · MIPS quality — percentile: 97Part D claim volume — percentile in specialty: 27 · MIPS quality — percentile: 75Part D claim volume — percentile in specialty: 10 · MIPS quality — percentile: 0Part D claim volume — percentile in specialty: 57 · MIPS quality — percentile: 17Part D claim volume — percentile in specialty: 12 · MIPS quality — percentile: 80Part D claim volume — percentile in specialty: 90 · MIPS quality — percentile: 42Part D claim volume — percentile in specialty: 42 · MIPS quality — percentile: 23Part D claim volume — percentile in specialty: 38 · MIPS quality — percentile: 83Part D claim volume — percentile in specialty: 40 · MIPS quality — percentile: 87Part D claim volume — percentile in specialty: 50 · MIPS quality — percentile: 88Part D claim volume — percentile in specialty: 32 · MIPS quality — percentile: 98Part D claim volume — percentile in specialty: 13 · MIPS quality — percentile: 68Part D claim volume — percentile in specialty: 43 · MIPS quality — percentile: 3Part D claim volume — percentile in specialty: 62 · MIPS quality — percentile: 67Part D claim volume — percentile in specialty: 70 · MIPS quality — percentile: 22Part D claim volume — percentile in specialty: 3 · MIPS quality — percentile: 47Part D claim volume — percentile in specialty: 52 · MIPS quality — percentile: 60Part D claim volume — percentile in specialty: 78 · MIPS quality — percentile: 18Part D claim volume — percentile in specialty: 2 · MIPS quality — percentile: 45Part D claim volume — percentile in specialty: 85 · MIPS quality — percentile: 37Part D claim volume — percentile in specialty: 75 · MIPS quality — percentile: 92Part D claim volume — percentile in specialty: 22 · MIPS quality — percentile: 63Part D claim volume — percentile in specialty: 33 · MIPS quality — percentile: 55Part D claim volume — percentile in specialty: 37 · MIPS quality — percentile: 8Part D claim volume — percentile in specialty: 100 · MIPS quality — percentile: 30Part D claim volume — percentile in specialty: 77 · MIPS quality — percentile: 2Part D claim volume — percentile in specialty: 63 · MIPS quality — percentile: 23Part D claim volume — percentile in specialty: 5 · MIPS quality — percentile: 23Part D claim volume — percentile in specialty: 45 · MIPS quality — percentile: 7Part D claim volume — percentile in specialty: 82 · MIPS quality — percentile: 88Part D claim volume — percentile in specialty: 92 · MIPS quality — percentile: 78Part D claim volume — percentile in specialty: 20 · MIPS quality — percentile: 53Part D claim volume — percentile in specialty: 47 · MIPS quality — percentile: 52Part D claim volume — percentile in specialty: 93 · MIPS quality — percentile: 85Part D claim volume — percentile in specialty: 17 · MIPS quality — percentile: 72Part D claim volume — percentile in specialty: 18 · MIPS quality — percentile: 40Melissa Walsh, P.A. — Part D claim volume — percentile in specialty: 82 · MIPS quality — percentile: 89
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one physician assistant peer from a representative sample of 60; the gold marker is Melissa Walsh, P.A.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

What does the federal data show about Melissa Walsh, P.A.?

High performer (top quartile)

NPI registry status

Active

Issued 10/06/2014

NPI 1033512918

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

990 25% vs specialty avg

2023 prescription claims

Specialty avg: 790

MIPS final score

97.8/100 14.7 pts vs avg

Exceptional band

vs 83.1 national avg

Specialty distribution in Oregon

How Physician Assistant compares to other specialties among Oregon providers

Oregon providers

Largest specialties in Oregon (% of in-state providers)

Mental Health Counselor — 12.1%Mental Health Counselor12.1%Massage Therapist — 4.8%Massage Therapist4.8%Counselor — 3.9%Counselor3.9%Addiction (Substance Use Disorder) Counselor — 3.5%Addiction (Substance Use Disorder) Counselor3.5%Case Manager/Care Coordinator — 3.4%Case Manager/Care Coordinator3.4%Clinical Social Worker — 3.3%Clinical Social Worker3.3%Physician Assistant — 1.6%Physician Assistant1.6%
Largest specialties in Oregon (% of in-state providers)

Medicare quality performance — MIPS

Melissa Walsh, P.A.'s 2023 MIPS final score plotted against the Physician Assistant national average

High performer (top quartile)
MIPS Final Score
97.8/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Physician Assistant) — 97.8/100 vs national avg 83.1

0%100%National avg83%97.8%
MIPS final score (Physician Assistant) — 97.8/100 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).

Melissa Walsh, P.A. appears in the CMS NPPES registry as a Physician Assistant provider holding P.A. credentials at 875 OAK ST SE STE 4030, Salem, OR, 97301, with a listed phone of (503) 561-6444. NPI 1033512918 was issued on 10/06/2014. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Walsh 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 990 prescription claims written by this provider, covering 257 Medicare beneficiaries and totaling roughly $145K in drug spend, with an opioid prescribing rate of 9.3%. 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 97.8/100 for the 2023 performance year (Quality 81), 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

875 OAK ST SE STE 4030
Salem, OR 97301

Provider Details

NPI 1033512918
Specialty Physician Assistant
Credentials P.A.
Gender Female
NPI Issued 10/06/2014

CMS Quality Score (MIPS)

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

97.83
Final Score
Avg: 83.1
80.9759
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where Melissa Walsh, P.A. 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.

Oregon Oncology Specialists LLP
Woodburn, 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).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Melissa Walsh, P.A.. Source: openpaymentsdata.cms.gov.

Total received

$357

Largest payer

Merck Sharp & Dohme LLC

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Medicare Part D Prescribing Data

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

990
Total Claims
$145K
Total Drug Cost
257
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,293
Total Day Supply
32,774
Generic Drug Cost
$21K
Opioid Claims
92 (9.3% rate)
Antibiotic Claims
17

Patient Demographics

Average Patient Age
71.4 years
Avg HCC Risk Score
2.14
Gender Split
67% female / 33% male
Age Distribution
<65: 40, 65-74: 129, 75-84: 60, 85+: 28

Top Prescribed Drugs (Medicare Part D)

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

What Melissa Walsh, P.A. 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
47
Oxycodone Hcl
40
Levothyroxine Sodium
37
Potassium Chloride
35
Eliquis
Apixaban
33
Ondansetron Odt
Ondansetron
31
Omeprazole
30
Lisinopril
26
Duloxetine Hcl
25
Losartan Potassium
24

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

Physician Assistant Overview

How Melissa Walsh, P.A. fits within the Physician Assistant landscape nationally.

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

Melissa Walsh, P.A.'s 990 claims are above the specialty average of 790.

Nearby Physician Assistant Providers in Oregon

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

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

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry — providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Oregon medical board — federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Physician Assistant peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only — they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Melissa Walsh, P.A.'s specialty?
Melissa Walsh, P.A. specializes in Physician Assistant and practices in Salem, Oregon. Credentials: P.A..
How much does Melissa Walsh, P.A. prescribe under Medicare Part D?
In 2023, Melissa Walsh, P.A. wrote 990 Medicare Part D claims totaling $145K in drug costs for 257 beneficiaries.
What is Melissa Walsh, P.A.'s Medicare quality score?
Melissa Walsh, P.A. has a CMS MIPS Final Score of 97.8/100 (Quality: 81). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Melissa Walsh, P.A. located?
Melissa Walsh, P.A. is located at 875 OAK ST SE STE 4030, Salem, OR, 97301. Phone: (503) 561-6444.
What is Melissa Walsh, P.A.'s NPI number?
Melissa Walsh, P.A.'s National Provider Identifier (NPI) is 1033512918, issued on 10/06/2014.
Does Melissa Walsh, P.A. prescribe opioids?
Yes, Melissa Walsh, P.A. had 92 opioid claims in 2023 with an opioid prescribing rate of 9.3%.
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 Melissa Walsh, P.A. prescribe most often?
Based on 2023 Medicare Part D data, Melissa Walsh, P.A.'s most frequently prescribed drugs include Atorvastatin Calcium, Oxycodone Hcl, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Melissa Walsh, P.A. accept Medicare?
Melissa Walsh, P.A. appears in CMS Medicare data with 990 Part D claims and 257 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Melissa Walsh, P.A.'s credentials?
Melissa Walsh, P.A.'s NPI is 1033512918 with credentials P.A.. 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

Compiled from official public sources by the PlainDoctor editorial team.