NPI registry status
Active
2026 NPPES data Hospitalist Physician NPI 1598224511 DO
Verify on CMS → Elizabeth Mazzeo, DO
Hospitalist Physician in Brunswick, Maine.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,825 in Hospitalist 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
225
Medicare Part D claims · 82 beneficiaries · Hospitalist Physician avg: 888
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
98.1/100
▲ 15 pts above national avg 83.1 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Elizabeth Mazzeo, DO reported a CMS MIPS final score of 98.1/100 - above the 83.1 national average - and filed 225 Medicare Part D claims in 2023.
- 98.1/100
- MIPS score · +15 vs avg
- 225
- Part D claims, 2023
- 92%
- 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.
Elizabeth Mazzeo, DO'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 11% higher than 89% 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 Elizabeth Mazzeo, DO sits
This provider among hospitalist physician peers
Across the 4,437 hospitalist physician providers who report both Medicare Part D prescribing and a MIPS quality score, Elizabeth Mazzeo, DO writes more Part D claims than 46% of them and scores higher on MIPS quality than 90% - 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 hospitalist physician peer from a representative sample of 60; the gold marker is Elizabeth Mazzeo, DO. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Elizabeth Mazzeo, DO 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 Elizabeth Mazzeo, DO?
High performer (top quartile)Primary specialty
Hospitalist Physician
Medicare Part D claims
225 75% vs specialty avg
MIPS final score
98.1/100 15 pts vs avg
Specialty distribution in Maine
How Hospitalist Physician compares to other specialties among Maine providers
Medicare quality performance, MIPS
Elizabeth Mazzeo, DO's 2023 MIPS final score plotted against the Hospitalist Physician national average
- MIPS Final Score
- 98.1/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Hospitalist Physician) - 98.1/100 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).
Elizabeth Mazzeo, DO appears in the CMS NPPES registry as a Hospitalist Physician provider holding DO credentials at 123 MEDICAL CENTER DR, Brunswick, ME, 04011, with a listed phone of (207) 373-6000. NPI 1598224511 was issued on 03/19/2019.
Medicare Part D records for calendar year 2023 show 225 prescription claims written by this provider, covering 82 Medicare beneficiaries and totaling roughly $8K in drug spend, split 8% brand-name and 92% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 98.1/100 for the 2023 performance year (Quality 86.1), compared with the national average of 83.1.
Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 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 | 1598224511 |
|---|---|
| Specialty | Hospitalist Physician |
| Credentials | DO |
| Gender | Female |
| NPI Issued | 03/19/2019 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
98.0699
Final Score
Avg: 83.1
86.1398
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Elizabeth Mazzeo, DO 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.
Mainehealth
Portland, ME
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 · Generic-heavy
Elizabeth Mazzeo, DO - brand share 8.0%
Hospitalist Physician average
8% brand-name claims vs 92% generic, on 225 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.
225
Total Claims
$8K
Total Drug Cost
82
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 240
- Total Day Supply
- 4,313
- Brand vs Generic
- 8% brand / 92% generic
- Brand Drug Cost
- $4K
- Generic Drug Cost
- $4K
- Antibiotic Claims
- 52
Patient Demographics
- Average Patient Age
- 75.9 years
- Avg HCC Risk Score
- 1.80
- Gender Split
- 55% female / 45% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Prednisone | 20 |
| Cefdinir | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hospitalist Physician Overview
How Elizabeth Mazzeo, DO fits within the Hospitalist Physician landscape nationally.
16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider
Elizabeth Mazzeo, DO's 225 claims are below the specialty average of 888.
Nearby Hospitalist Physician Providers in Maine
Other clinicians with the same primary specialty enrolled in Maine, drawn from the same CMS NPPES roster as Mazzeo.
Dr. Moataz Mohamed Nazmy Abdelnaby
MD
Bangor, ME
Dr. Kelly Aguilar
M.D.
Bangor, ME
Dr. Mohanad Ahmed
MD
Bangor, ME
Dr. Mohammed Al-Nufal
MD
Augusta, ME
Dr. Ahmed Aldilaimi
MD
Waterville, ME
Compare Hospitalist 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 Maine medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hospitalist 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.
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Medical Specialties Explained
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Understanding Medicare Claims Data
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Frequently Asked Questions
What is Elizabeth Mazzeo, DO's specialty? ▼
Elizabeth Mazzeo, DO specializes in Hospitalist Physician and practices in Brunswick, Maine. Credentials: DO.
How much does Elizabeth Mazzeo, DO prescribe under Medicare Part D? ▼
In 2023, Elizabeth Mazzeo, DO wrote 225 Medicare Part D claims totaling $8K in drug costs for 82 beneficiaries.
What is Elizabeth Mazzeo, DO's Medicare quality score? ▼
Elizabeth Mazzeo, DO has a CMS MIPS Final Score of 98.1/100 (Quality: 86.1). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Elizabeth Mazzeo, DO located? ▼
Elizabeth Mazzeo, DO is located at 123 MEDICAL CENTER DR, Brunswick, ME, 04011. Phone: (207) 373-6000.
What is Elizabeth Mazzeo, DO's NPI number? ▼
Elizabeth Mazzeo, DO's National Provider Identifier (NPI) is 1598224511, issued on 03/19/2019.
Does Elizabeth Mazzeo, DO prescribe more brand-name or generic drugs? ▼
Elizabeth Mazzeo, DO's prescribing is 8% brand-name and 92% generic drugs by claim count, with $4K in brand drug costs.
How many Hospitalist Physician providers are there in the US? ▼
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does Elizabeth Mazzeo, DO prescribe most often? ▼
Based on 2023 Medicare Part D data, Elizabeth Mazzeo, DO's most frequently prescribed drugs include Prednisone, Cefdinir. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Elizabeth Mazzeo, DO accept Medicare? ▼
Elizabeth Mazzeo, DO appears in CMS Medicare data with 225 Part D claims and 82 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Elizabeth Mazzeo, DO's credentials? ▼
Elizabeth Mazzeo, DO's NPI is 1598224511 with credentials DO. 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.