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2026 NPPES data Medical Physician Assistant NPI 1013015866 PA-C
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Maria Trees, PA-C

Medical Physician Assistant in Harrisburg, Pennsylvania.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 40,580 in Medical 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
2K
Medicare Part D claims · 468 beneficiaries · Medical Physician Assistant avg: 1K
MIPS score
84.5/100
▲ 1 pts above national avg 83.5 · Above neutral
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Maria Trees, PA-C reported a CMS MIPS final score of 84.5/100 - above the 83.5 national average - and filed 2,084 Medicare Part D claims in 2023.

84.5/100
MIPS score · +1 vs avg
2K
Part D claims, 2023
≥42nd
pct among measured MIPS (lower-bound band)

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.

CMS NPPES provider registry desk

NPI 1013015866 · Medical Physician Assistant

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

  • NPI-10 1013015866
  • ENUM-LEGACY 2006
  • TAX-MID 41K Medical Physician
  • MIPS-INLINE 84.5/100
  • RX-MID 2,084
  • BOOK-LIGHT 3,805 in Pennsylvania
  • PHOTO-FINISH Michelle Christie · ±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

Maria Trees, PA-C'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.

85 ≥ 42nd percentile 42% 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%). This entry sits in this band. 90+: 189,403 measured providers (42%). Above this entry. 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 Maria Trees, PA-C sits

This provider among medical physician assistant peers

Across the 7,147 medical physician assistant providers who report both Medicare Part D prescribing and a MIPS quality score, Maria Trees, PA-C writes more Part D claims than 87% of them and scores higher on MIPS quality than 44% - placing this provider in the high-volume, lower-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 quality0255075100024.949.974.899.8Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 58Maria Trees, PA-C, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 44
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one medical physician assistant peer from a representative sample of 60; the gold marker is Maria Trees, PA-C. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

What does the federal data show about Maria Trees, PA-C?

Near national average

NPI registry status

Active

Issued 09/20/2006

NPI 1013015866

Primary specialty

Medical Physician Assistant

Mid-sized

40,580 US NPIs in this specialty

Medicare Part D claims

2,084 94% vs specialty avg

2023 prescription claims

Specialty avg: 1,077

MIPS final score

84.5/100 1 pts vs avg

Above neutral band

vs 83.5 national avg

Specialty distribution in Pennsylvania

How Medical Physician Assistant compares to other specialties among Pennsylvania providers

Pennsylvania providers
Student in an Organized Heal…5.6%Pharmacist5%Physical Therapist4.9%Mental Health Counselor3.9%Internal Medicine Physician3.3%Professional Counselor3.2%Medical Physician Assistant1.5%
Largest specialties in Pennsylvania (% of in-state providers)

Medicare quality performance, MIPS

Maria Trees, PA-C's 2023 MIPS final score plotted against the Medical Physician Assistant national average

Near national average
MIPS Final Score
84.5/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%84.5%
MIPS final score (Medical Physician Assistant) - 84.5/100 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

845 SIR THOMAS COURT
Harrisburg, PA 17109
(717) 651-5800

Provider Details

NPI 1013015866
Specialty Medical Physician Assistant
Credentials PA-C
Gender Female
NPI Issued 09/20/2006

CMS Quality Score (MIPS)

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

84.4885
Final Score
Measured-score avg: 83.5
88.7068
Quality
46.686
Cost

Reporting: Group practice

Hospital and facility affiliations

Facilities where Maria Trees, 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.

Morganstein DE Falcis Rehabilitation Institute LLC
Harrisburg, PA

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 - Pennsylvania PA-BOM 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 ~45K Pennsylvania medical licensees in 2023 - they are NOT specific to Maria Trees, PA-C. To verify Maria Trees, PA-C's current license status, search the PA-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

133
Total board actions, Pennsylvania 2023
Across 129 cases
2.96
Actions per 1,000 licensees
Pennsylvania statewide rate
probation
Most common action type
48 cases

PA-BOM 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 Pennsylvania 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.

2,084
Total Claims
$103K
Total Drug Cost
468
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,117
Total Day Supply
48,843
Generic Drug Cost
$37K
Opioid Claims
781 (37.5% rate)
Antibiotic Claims
12

Patient Demographics

Average Patient Age
72.8 years
Avg HCC Risk Score
1.92
Gender Split
63% female / 37% male
Age Distribution
<65: 79, 65-74: 190, 75-84: 135, 85+: 64

Top Prescribed Drugs (Medicare Part D)

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

What Maria Trees, 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
Oxycodone Hcl
 178
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
175
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
137
Atorvastatin Calcium
 102
Tramadol Hcl
 90
Clopidogrel
Clopidogrel Bisulfate
77
Pregabalin
 69
Bumetanide
 62
Morphine Sulfate Er
Morphine Sulfate
62
Pantoprazole Sodium
 58

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

More Medical Physician Assistant in PA → All providers in Pennsylvania → Compare specialties →

Medical Physician Assistant Overview

How Maria Trees, PA-C fits within the Medical Physician Assistant landscape nationally.

40,580
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider

Maria Trees, PA-C's 2,084 claims are above the specialty average of 1,077.

Nationwide Medical Physician Assistant peers with similar MIPS or enrollment year

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

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (84.5 here).

Michelle Christie 84.5 NY Joseph Krajewski 84.5 NY Stephanie Parobek-Baker 84.5 NY Allison Adajian 84.5 CT

Same NPPES enumeration year (2006)

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

Elena Beider Daly City, CA Janet Childers Clarksburg, WV Tonya Politano Saint Cloud, FL Richard Donovan Tallahassee, FL

Nearby Medical Physician Assistant Providers in Pennsylvania

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

One of 3,805 Medical Physician Assistant providers enrolled in Pennsylvania, 5 are shown here.

Dr. Kathryn Abadi
PA-C
Wellsboro, PA
Dr. Michael Abbott
PA-C
Pittsburgh, PA
Dr. Patricia Abbott
PA-C
Philadelphia, PA
Paul Abbott
Butler, PA
Dr. Bashera Abdul-Hadi
PA-C
Philadelphia, PA

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

Frequently Asked Questions

What is Maria Trees, PA-C's specialty? ▼
Maria Trees, PA-C specializes in Medical Physician Assistant and practices in Harrisburg, Pennsylvania. Credentials: PA-C.
How much does Maria Trees, PA-C prescribe under Medicare Part D? ▼
In 2023, Maria Trees, PA-C wrote 2,084 Medicare Part D claims totaling $103K in drug costs for 468 beneficiaries.
What is Maria Trees, PA-C's Medicare quality score? ▼
Maria Trees, PA-C has a CMS MIPS Final Score of 84.5/100 (Quality: 88.7, Cost: 46.7). 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 Maria Trees, PA-C located? ▼
Maria Trees, PA-C is located at 845 SIR THOMAS COURT, Harrisburg, PA, 17109. Phone: (717) 651-5800.
What is Maria Trees, PA-C's NPI number? ▼
Maria Trees, PA-C's National Provider Identifier (NPI) is 1013015866, issued on 09/20/2006.
Does Maria Trees, PA-C prescribe opioids? ▼
Yes, Maria Trees, PA-C had 781 opioid claims in 2023 with an opioid prescribing rate of 37.5%.
How many Medical Physician Assistant providers are there in the US? ▼
There are 40,580 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 Maria Trees, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Maria Trees, PA-C's most frequently prescribed drugs include Oxycodone Hcl, Hydrocodone-Acetaminophen, Oxycodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Maria Trees, PA-C accept Medicare? ▼
Maria Trees, PA-C appears in CMS Medicare data with 2,084 Part D claims and 468 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Maria Trees, PA-C's credentials? ▼
Maria Trees, PA-C's NPI is 1013015866 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

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.