NPI registry status
Active
2026 NPPES data Pediatric Cardiology Physician NPI 1013907666 MD
Verify on CMS → Mark Alexander, MD
Pediatric Cardiology Physician in Scarborough, 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 2,663 in Pediatric Cardiology 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
21
Medicare Part D claims · Pediatric Cardiology Physician avg: 93
MIPS score
98.1/100
▲ 15 pts above national avg 83.5 · Exceptional
Industry payments
$96.84
1 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Mark Alexander, MD reported a CMS MIPS final score of 98.1/100 - above the 83.5 national average - and filed 21 Medicare Part D claims in 2024.
- 98.1/100
- MIPS score · +15 vs avg
- 21
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥89th
- 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.
Federal trust snapshot
What official records show about Mark Alexander, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1013907666), first enumerated 10/25/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 21 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 98.1/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$96.84 in reported industry payments (1 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1013907666 · Pediatric Cardiology Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · MIPS-ELITE · RX-TRACE · BOOK-THIN · PHOTO-FINISH
- NPI-10 1013907666
- ENUM-LEGACY 2005
- TAX-NARROW 2,663
- MIPS-ELITE 98.1/100
- RX-TRACE 21
- BOOK-THIN 14 in Maine
- PHOTO-FINISH Edward O'Leary · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Laurie Armsby · …
Laurie Armsby
97.8 MIPS pts
- Seshadri Balaji …
Seshadri Balaji
97.8 MIPS pts
- Alexander · this…
Alexander · this provider
98.1 MIPS pts
- Edward O'Leary ·…
Edward O'Leary
98.1 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Mark Alexander, MD'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.
98 ≥ 89th percentile 89% of 454,083 measured providers are in lower value bands
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 Mark Alexander, MD sits
This provider among pediatric cardiology physician peers
Across the 68 pediatric cardiology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Mark Alexander, MD writes more Part D claims than 28% of them and scores higher on MIPS quality than 79% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one pediatric cardiology physician peer from a representative sample of 60; the gold marker is Mark Alexander, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Mark Alexander, MD 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 Mark Alexander, MD?
High performer (top quartile)Primary specialty
Pediatric Cardiology Physician
Medicare Part D claims
21 77% vs specialty avg
MIPS final score
98.1/100 14.6 pts vs avg
Specialty distribution in Maine
How Pediatric Cardiology Physician compares to other specialties among Maine providers
Medicare quality performance, MIPS
Mark Alexander, MD's 2023 MIPS final score plotted against the Pediatric Cardiology Physician national average
- MIPS Final Score
- 98.1/100
- vs 83.5 national avg · 2023 performance year
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
Provider Details
| NPI | 1013907666 |
|---|---|
| Specialty | Pediatric Cardiology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/25/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
98.0699
Final Score
Measured-score avg: 83.5
86.1398
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Mark Alexander, MD 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.
Boston Childrens Heart Foundation Inc
Boston, MA
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 Mark Alexander, MD. Source: openpaymentsdata.cms.gov.
Total received
$97
Largest payer
Biosense Webster, Inc.
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 2024.
21
Total Claims
$5K
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 54.833
- Total Day Supply
- 1,591
- Generic Drug Cost
- $757
Patient Demographics
- Average Patient Age
- 47.0 years
- Avg HCC Risk Score
- 1.30
Pediatric Cardiology Physician Overview
How Mark Alexander, MD fits within the Pediatric Cardiology Physician landscape nationally.
2,663
Pediatric Cardiology Physician Providers in US
51
States with Pediatric Cardiology Physician
93
Avg Claims per Provider
Mark Alexander, MD's 21 claims are below the specialty average of 93.
Nationwide Pediatric Cardiology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Alexander, both outside Maine so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (98.1 here).
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Pediatric Cardiology Physician Providers in Maine
Other clinicians with the same primary specialty enrolled in Maine, drawn from the same CMS NPPES roster as Alexander.
One of 14 Pediatric Cardiology Physician providers enrolled in Maine, 5 are shown here.
Dr. Jon Donnelly
M.D
Scarborough, ME
Dr. Michael Epstein
MD
Bangor, ME
Dr. Anglea Gilladoga
MD
Bangor, ME
Dr. Sean Hagenbuch
MD, FAAP, FACC
Bangor, ME
Wade Hamilton
Lewiston, ME
Compare Pediatric Cardiology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mark Alexander, MD's specialty? ▼
Mark Alexander, MD specializes in Pediatric Cardiology Physician and practices in Scarborough, Maine. Credentials: MD.
How much does Mark Alexander, MD prescribe under Medicare Part D? ▼
In 2024, Mark Alexander, MD wrote 21 Medicare Part D claims totaling $5K in drug costs for N/A beneficiaries.
What is Mark Alexander, MD's Medicare quality score? ▼
Mark Alexander, MD has a CMS MIPS Final Score of 98.1/100 (Quality: 86.1). 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 Mark Alexander, MD located? ▼
Mark Alexander, MD is located at 71 US ROUTE 1 STE C, Scarborough, ME, 04074. Phone: (207) 883-5532.
What is Mark Alexander, MD's NPI number? ▼
Mark Alexander, MD's National Provider Identifier (NPI) is 1013907666, issued on 10/25/2005.
How many Pediatric Cardiology Physician providers are there in the US? ▼
There are 2,663 Pediatric Cardiology Physician providers across 51 states in the US. The average Pediatric Cardiology Physician provider writes 93 Medicare Part D claims per year.
Does Mark Alexander, MD accept Medicare? ▼
Mark Alexander, MD appears in CMS Medicare data with 21 Part D claims and N/A Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Alexander, MD's credentials? ▼
Mark Alexander, MD's NPI is 1013907666 with credentials MD. 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.