William O'Brien, M.D.
NPI 1700860558 · Maternal & Fetal Medicine Physician · Fort Myers, FL
William O'Brien, M.D. is a Maternal & Fetal Medicine Physician provider in Fort Myers, FL (NPI 1700860558).
Provider details
- NPI number
- 1700860558
- Entity type
- Individual
- Primary specialty
- Maternal & Fetal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- ME42212 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% 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
- 2005-12-05
- Last updated
- 2007-07-08
Frequently asked questions
- What is William O'Brien's NPI number?
- William O'Brien's National Provider Identifier (NPI) is 1700860558, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William O'Brien's specialty?
- William O'Brien is listed in the NPPES registry with a primary specialty of Maternal & Fetal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William O'Brien located?
- William O'Brien's practice location on file with NPPES is 9981 Healthpark Cr, Fort Myers, FL 33908.
- What is William O'Brien's phone number?
- The practice phone number listed in the NPPES registry for William O'Brien is (239) 481-5477.
- Is William O'Brien's NPI active?
- Yes — William O'Brien's NPI (1700860558) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.