William Kirby, M.D.
NPI 1528021755 · Pediatric Cardiology Physician · Fairfax, VA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Kirby, M.D. is a Pediatric Cardiology Physician provider in Fairfax, VA (NPI 1528021755).
Provider details
- NPI number
- 1528021755
- Entity type
- Individual
- Primary specialty
- Pediatric Cardiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D34047 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$16 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 3300 Gallows RdFalls Church, VA 22042-3300Phone: (703) 776-4001Fax: (703) 776-7113
Registry dates
- Enumerated
- 2006-04-10
- Last updated
- 2021-07-14
- Certified
- 2021-07-14
Frequently asked questions
- What is William Kirby's NPI number?
- William Kirby's National Provider Identifier (NPI) is 1528021755, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Kirby's specialty?
- William Kirby is listed in the NPPES registry with a primary specialty of Pediatric Cardiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Kirby located?
- William Kirby's practice location on file with NPPES is 8318 Arlington Blvd, Fairfax, VA 22031-5218.
- What is William Kirby's phone number?
- The practice phone number listed in the NPPES registry for William Kirby is (703) 876-8410.
- Does William Kirby accept Medicare?
- William Kirby is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Kirby's NPI active?
- Yes — William Kirby's NPI (1528021755) is active in the NPPES registry as of the last update on 2021-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.