NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1588291066
Verify on CMS → Alyssa Mackay
Internal Medicine Physician in Charlotte, North Carolina.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,858 in Internal 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
98
Medicare Part D claims · 18 beneficiaries · Internal Medicine Physician avg: 3K
MIPS score
95.4/100
▲ 12 pts above national avg 83.1 · Exceptional
Industry payments
$269.59
3 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Alyssa Mackay reported a CMS MIPS final score of 95.4/100 - above the 83.1 national average - and filed 98 Medicare Part D claims in 2023.
- 95.4/100
- MIPS score · +12 vs avg
- 98
- Part D claims, 2023
- 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.
Alyssa Mackay's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
95 Top 21% higher than 79% of 477,587 scored providers
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 Alyssa Mackay sits
This provider among internal medicine physician peers
Across the 36,260 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Alyssa Mackay writes more Part D claims than 13% of them and scores higher on MIPS quality than 80% - placing this provider in the lower-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
Each dot is one internal medicine physician peer from a representative sample of 60; the gold marker is Alyssa Mackay. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Alyssa Mackay practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Alyssa Mackay?
High performer (top quartile)Primary specialty
Internal Medicine Physician
Medicare Part D claims
98 96% vs specialty avg
MIPS final score
95.4/100 12.3 pts vs avg
Specialty distribution in North Carolina
How Internal Medicine Physician compares to other specialties among North Carolina providers
Medicare quality performance, MIPS
Alyssa Mackay's 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 95.4/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Internal Medicine Physician) - 95.4/100 vs national avg 83.1
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).
Alyssa Mackay appears in the CMS NPPES registry as a Internal Medicine Physician provider at 1350 S KINGS DR FL 3, Charlotte, NC, 28207, with a listed phone of (704) 446-1242. NPI 1588291066 was issued on 03/25/2020.
Medicare Part D records for calendar year 2023 show 98 prescription claims written by this provider, covering 18 Medicare beneficiaries and totaling roughly $5K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 95.4/100 for the 2023 performance year (Quality 84.2), compared with the national average of 83.1.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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
Provider Details
| NPI | 1588291066 |
|---|---|
| Specialty | Internal Medicine Physician |
| Gender | Female |
| NPI Issued | 03/25/2020 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
95.3578
Final Score
Avg: 83.1
84.2235
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
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 Alyssa Mackay. Source: openpaymentsdata.cms.gov.
Total received
$270
Largest payer
Lilly USA, LLC
Most common payment type
Education
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.
98
Total Claims
$5K
Total Drug Cost
18
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 160
- Total Day Supply
- 4,636
- Generic Drug Cost
- $2K
Patient Demographics
- Average Patient Age
- 70.6 years
- Avg HCC Risk Score
- 2.34
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Duloxetine Hcl | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Alyssa Mackay fits within the Internal Medicine Physician landscape nationally.
172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Alyssa Mackay's 98 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in North Carolina
Other clinicians with the same primary specialty enrolled in North Carolina, drawn from the same CMS NPPES roster as Mackay.
Dr. Ana Abaroa-Salvatierra
M.D.
Pollocksville, NC
Dr. Naa Deisa Abbey
MD
Shelby, NC
Dr. Hanie Abdel Masih
D.O.
Rockingham, NC
Dr. Rami Abdo
MD
Durham, NC
Dr. Farhath Abdul Kareem
MD
Cary, NC
Compare Internal Medicine Physician 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 North Carolina medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Internal Medicine Physician 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.
Healthcare Guides
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Medical Specialties Explained
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Explore North Carolina
Frequently Asked Questions
What is Alyssa Mackay's specialty? ▼
Alyssa Mackay specializes in Internal Medicine Physician and practices in Charlotte, North Carolina.
How much does Alyssa Mackay prescribe under Medicare Part D? ▼
In 2023, Alyssa Mackay wrote 98 Medicare Part D claims totaling $5K in drug costs for 18 beneficiaries.
What is Alyssa Mackay's Medicare quality score? ▼
Alyssa Mackay has a CMS MIPS Final Score of 95.4/100 (Quality: 84.2). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Alyssa Mackay located? ▼
Alyssa Mackay is located at 1350 S KINGS DR FL 3, Charlotte, NC, 28207. Phone: (704) 446-1242.
What is Alyssa Mackay's NPI number? ▼
Alyssa Mackay's National Provider Identifier (NPI) is 1588291066, issued on 03/25/2020.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Alyssa Mackay prescribe most often? ▼
Based on 2023 Medicare Part D data, Alyssa Mackay's most frequently prescribed drugs include Duloxetine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Alyssa Mackay accept Medicare? ▼
Alyssa Mackay appears in CMS Medicare data with 98 Part D claims and 18 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alyssa Mackay's credentials? ▼
Alyssa Mackay's NPI is 1588291066. 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 PlainDoctor editorial team.