William O'Sullivan
NPI 1801408877 · Professional Counselor · Fernandina Beach, FL
William O'Sullivan is a Professional Counselor provider in Fernandina Beach, FL (NPI 1801408877).
Provider details
- NPI number
- 1801408877
- Entity type
- Individual
- Primary specialty
- Professional CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2020-08-20
- Last updated
- 2020-08-20
- Certified
- 2020-08-20
Frequently asked questions
- What is William O'Sullivan's NPI number?
- William O'Sullivan's National Provider Identifier (NPI) is 1801408877, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William O'Sullivan's specialty?
- William O'Sullivan is listed in the NPPES registry with a primary specialty of Professional Counselor (Behavioral Health & Social Service Providers).
- Where is William O'Sullivan located?
- William O'Sullivan's practice location on file with NPPES is 1890 S 14th St Ste 110, Fernandina Beach, FL 32034-4718.
- What is William O'Sullivan's phone number?
- The practice phone number listed in the NPPES registry for William O'Sullivan is (904) 599-8320.
- Is William O'Sullivan's NPI active?
- Yes — William O'Sullivan's NPI (1801408877) is active in the NPPES registry as of the last update on 2020-08-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.