Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Leon Frederick O'Neill IV, DO

Individual provider Cardiovascular Disease Physician · NPI 1275723736

Dr. Leon Frederick O'Neill IV, DO is a Cardiovascular Disease (Cardiology) in Eatontown, New Jersey. Graduated from Philadelphia College of Osteopathic Medicine in 2005, 21 years ago. Practices with Monmouth Cardiology Associates, LLC, a 43-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in New Jersey and Virginia.

Years since qualifying
21
Trained at
Philadelphia College of Osteopathic Medicine
Licensed in
NJ, VA
In the registry since
2007
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

11 Meridian Rd
Eatontown, NJ 07724-2242
Phone: (732) 776-5138
Fax: (732) 776-6601
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 301 Riverview Ave Ste 700, Norfolk, VA 23510-1065 — (757) 252-9365

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 25MB08394100 (NJ)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence 0102208428 (VA)

Record details

NPI number1275723736
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJuly 30, 2007
Last updated in NPPESApril 9, 2024
Certification dateApril 9, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolPHILADELPHIA COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2005 (21 years in practice)
Group practice Monmouth Cardiology Associates, Llc — 43 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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