NPI registry status
Active
2026 NPPES data Pediatric Cardiology Physician NPI 1134430986 M.D.
Verify on CMS → Mark Cartoski, M.D.
Pediatric Cardiology Physician in Wilmington, Delaware.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 2,558 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.
What the federal data shows
Mark Cartoski, M.D. is a Pediatric Cardiology Physician in Wilmington, Delaware, listed in the federal CMS National Provider Identifier registry.
- Likely
- board-certified (heuristic)
- #97
- Pediatric Cardiology Physician rank among Delaware specialties
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 1134430986 · Pediatric Cardiology Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1134430986
- ENUM-MID 2010
- TAX-NARROW 2,558
- RX-NONE No Part D
- BOOK-THIN 23 in Delaware
- PHOTO-ENUM Ivan Dimich · 2010
✓
Board certification likely (heuristic, not verified)
Mark Cartoski, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Cartoski, M.D.?
Quality data not reportedPrimary specialty
Pediatric Cardiology Physician
Specialty distribution in Delaware
How Pediatric Cardiology Physician compares to other specialties among Delaware providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Pediatric Cardiology Physician. Verify directly:
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 | 1134430986 |
|---|---|
| Specialty | Pediatric Cardiology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/27/2010 |
Hospital and facility affiliations
Facilities where Mark Cartoski, M.D. 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.
The Nemours Foundation
Wilmington, DE
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Pediatric Cardiology Physician Overview
How Mark Cartoski, M.D. fits within the Pediatric Cardiology Physician landscape nationally.
2,558
Pediatric Cardiology Physician Providers in US
51
States with Pediatric Cardiology Physician
77
Avg Claims per Provider
Nationwide Pediatric Cardiology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Cartoski, both outside Delaware so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2010)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Pediatric Cardiology Physician Providers in Delaware
Other clinicians with the same primary specialty enrolled in Delaware, drawn from the same CMS NPPES roster as Cartoski.
One of 23 Pediatric Cardiology Physician providers enrolled in Delaware, 5 are shown here.
Dr. Paul Anisman
MD
Wilmington, DE
Dr. Jeanne Baffa
MD
Wilmington, DE
Kristian Becker
Wilmington, DE
Dr. Heather Claar
PA-C
Wilmington, DE
Dr. Bernard Clark
MD
Wilmington, DE
Compare Pediatric Cardiology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mark Cartoski, M.D.'s specialty? ▼
Mark Cartoski, M.D. specializes in Pediatric Cardiology Physician and practices in Wilmington, Delaware. Credentials: M.D..
Where is Mark Cartoski, M.D. located? ▼
Mark Cartoski, M.D. is located at 1600 ROCKLAND RD, Wilmington, DE, 19803. Phone: (302) 651-4200.
What is Mark Cartoski, M.D.'s NPI number? ▼
Mark Cartoski, M.D.'s National Provider Identifier (NPI) is 1134430986, issued on 06/27/2010.
How many Pediatric Cardiology Physician providers are there in the US? ▼
There are 2,558 Pediatric Cardiology Physician providers across 51 states in the US. The average Pediatric Cardiology Physician provider writes 77 Medicare Part D claims per year.
Does Mark Cartoski, M.D. accept Medicare? ▼
Mark Cartoski, M.D. appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Cartoski, M.D.'s credentials? ▼
Mark Cartoski, M.D.'s NPI is 1134430986 with credentials M.D.. 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.
- 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
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.