Jennifer O'Neil, MD
NPI 1548427271 · Pediatric Cardiology Physician · Fairfax, VA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennifer O'Neil, MD is a Pediatric Cardiology Physician provider in Fairfax, VA (NPI 1548427271).
Provider details
- NPI number
- 1548427271
- Entity type
- Individual
- Primary specialty
- Pediatric Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 0101250398 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 8260 Willow Oaks Corporate Dr Ste 625Fairfax, VA 22031-4513Phone: (703) 573-0504Fax: (571) 573-4856
Registry dates
- Enumerated
- 2008-05-20
- Last updated
- 2026-05-05
- Certified
- 2026-05-05
Frequently asked questions
- What is Jennifer O'Neil's NPI number?
- Jennifer O'Neil's National Provider Identifier (NPI) is 1548427271, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer O'Neil's specialty?
- Jennifer O'Neil is listed in the NPPES registry with a primary specialty of Pediatric Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is Jennifer O'Neil located?
- Jennifer O'Neil's practice location on file with NPPES is 8260 Willow Oaks Corporate Dr Ste 400, Fairfax, VA 22031-4513.
- What is Jennifer O'Neil's phone number?
- The practice phone number listed in the NPPES registry for Jennifer O'Neil is (703) 573-0504.
- Does Jennifer O'Neil accept Medicare?
- Jennifer O'Neil is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennifer O'Neil's NPI active?
- Yes — Jennifer O'Neil's NPI (1548427271) is active in the NPPES registry as of the last update on 2026-05-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.