2026 NPPES data Physician Assistant NPI 1538817721 PA
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Aaron Alexander, PA

Physician Assistant in New York, New York. 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
778
Medicare Part D claims · 255 beneficiaries · Physician Assistant avg: 790
Generic prescribing
97%
generic claims · 3% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
91.3/100
▲ 8 pts above national avg 83.1 · Exceptional
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Aaron Alexander, PA reported a CMS MIPS final score of 91.3/100 - above the 83.1 national average - and filed 778 Medicare Part D claims in 2023.

91.3/100
MIPS score · +8 vs avg
778
Part D claims, 2023
97%
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.

Aaron Alexander, PA's MIPS score vs every scored U.S. clinician

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

91 Top 37% higher than 63% 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+: 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 Aaron Alexander, PA 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, Aaron Alexander, PA writes more Part D claims than 78% of them and scores higher on MIPS quality than 62% - 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: 73 · MIPS quality, percentile: 95Part 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: 72Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 38Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 78Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 62Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 73Part 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: 82Part 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: 75 · 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: 77Part 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: 82Part 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: 85Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 90Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 98Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 70Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 3Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 68Part D claim volume, percentile in specialty: 72 · 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: 80 · 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: 77 · MIPS quality, percentile: 93Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 65Part 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: 78 · 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: 90Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 80Part 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: 87Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 73Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 40Aaron Alexander, PA-Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 62
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 Aaron Alexander, PA. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

What does the federal data show about Aaron Alexander, PA?

High performer (top quartile)

NPI registry status

Active

Issued 03/16/2022

NPI 1538817721

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

778 2% vs specialty avg

2023 prescription claims

Specialty avg: 790

MIPS final score

91.3/100 8.2 pts vs avg

Exceptional band

vs 83.1 national avg

Specialty distribution in New York

How Physician Assistant compares to other specialties among New York providers

New York providers

Largest specialties in New York (% of in-state providers)

Student in an Organized Health Care Education/Training Program - 7.8%Student in an Organized Health Care Education/Training Program7.8%Registered Nurse - 5.2%Registered Nurse5.2%Clinical Social Worker - 4.9%Clinical Social Worker4.9%Social Worker - 4.5%Social Worker4.5%Speech-Language Pathologist - 4.5%Speech-Language Pathologist4.5%Licensed Practical Nurse - 4.3%Licensed Practical Nurse4.3%Physician Assistant - 2.7%Physician Assistant2.7%
Largest specialties in New York (% of in-state providers)

Medicare quality performance, MIPS

Aaron Alexander, PA's 2023 MIPS final score plotted against the Physician Assistant national average

High performer (top quartile)
MIPS Final Score
91.3/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Physician Assistant) - 91.3/100 vs national avg 83.1

0%100%National avg83%91.3%
MIPS final score (Physician Assistant) - 91.3/100 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).

Aaron Alexander, PA appears in the CMS NPPES registry as a Physician Assistant provider holding PA credentials at 100 E 77TH ST, New York, NY, 10075, with a listed phone of (212) 434-2000. NPI 1538817721 was issued on 03/16/2022. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Alexander 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 778 prescription claims written by this provider, covering 255 Medicare beneficiaries and totaling roughly $17K in drug spend, split 3% brand-name and 97% generic by claim count, with an opioid prescribing rate of 17.5%. 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 91.3/100 for the 2023 performance year (Quality 74.9), 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

100 E 77TH ST
New York, NY 10075

Provider Details

NPI 1538817721
Specialty Physician Assistant
Credentials PA
Gender Male
NPI Issued 03/16/2022

CMS Quality Score (MIPS)

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

91.2532
Final Score
Avg: 83.1
74.9203
Quality
91.6794
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where Aaron Alexander, PA 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.

North Shore-Lij Medical PC
New York, NY

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 - New York NYSBPMC 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 ~100K New York medical licensees in 2023 - they are NOT specific to Aaron Alexander, PA. To verify Aaron Alexander, PA's current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases

NYSBPMC 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 New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Generic-heavy

Aaron Alexander, PA - brand share 3.0%
Physician Assistant average

3% brand-name claims vs 97% generic, on 778 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.

778
Total Claims
$17K
Total Drug Cost
255
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
799
Total Day Supply
20,069
Brand vs Generic
3% brand / 97% generic
Brand Drug Cost
$4K
Generic Drug Cost
$14K
Opioid Claims
136 (17.5% rate)
Antibiotic Claims
30

Patient Demographics

Average Patient Age
70.8 years
Avg HCC Risk Score
1.21
Gender Split
71% female / 29% male

Top Prescribed Drugs (Medicare Part D)

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

What Aaron Alexander, PA 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
Meloxicam
250
Celecoxib
133
Pantoprazole Sodium
127
Oxycodone Hcl
75
Diclofenac Sodium
39
Morphine Sulfate Er
Morphine Sulfate
28
Tramadol Hcl
28
Cefadroxil
16
Gabapentin
12
Amoxicillin
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 Aaron Alexander, PA fits within the Physician Assistant landscape nationally.

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

Aaron Alexander, PA's 778 claims are below the specialty average of 790.

Nearby Physician Assistant Providers in New York

Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Alexander.

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 New York 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 Aaron Alexander, PA's specialty?
Aaron Alexander, PA specializes in Physician Assistant and practices in New York, New York. Credentials: PA.
How much does Aaron Alexander, PA prescribe under Medicare Part D?
In 2023, Aaron Alexander, PA wrote 778 Medicare Part D claims totaling $17K in drug costs for 255 beneficiaries.
What is Aaron Alexander, PA's Medicare quality score?
Aaron Alexander, PA has a CMS MIPS Final Score of 91.3/100 (Quality: 74.9). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Aaron Alexander, PA located?
Aaron Alexander, PA is located at 100 E 77TH ST, New York, NY, 10075. Phone: (212) 434-2000.
What is Aaron Alexander, PA's NPI number?
Aaron Alexander, PA's National Provider Identifier (NPI) is 1538817721, issued on 03/16/2022.
Does Aaron Alexander, PA prescribe more brand-name or generic drugs?
Aaron Alexander, PA's prescribing is 3% brand-name and 97% generic drugs by claim count, with $4K in brand drug costs.
Does Aaron Alexander, PA prescribe opioids?
Yes, Aaron Alexander, PA had 136 opioid claims in 2023 with an opioid prescribing rate of 17.5%.
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 Aaron Alexander, PA prescribe most often?
Based on 2023 Medicare Part D data, Aaron Alexander, PA's most frequently prescribed drugs include Meloxicam, Celecoxib, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Aaron Alexander, PA accept Medicare?
Aaron Alexander, PA appears in CMS Medicare data with 778 Part D claims and 255 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Aaron Alexander, PA's credentials?
Aaron Alexander, PA's NPI is 1538817721 with credentials PA. 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.