William Owsley, M.D.
NPI 1003965039 · Otolaryngology Physician · Newport Beach, CA
William Owsley, M.D. is a Otolaryngology Physician provider in Newport Beach, CA (NPI 1003965039).
Provider details
- NPI number
- 1003965039
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- C33164 (CA)
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
19 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
- 2007-01-09
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Owsley's NPI number?
- William Owsley's National Provider Identifier (NPI) is 1003965039, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Owsley's specialty?
- William Owsley is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is William Owsley located?
- William Owsley's practice location on file with NPPES is 2011 Westcliff Dr, Newport Beach, CA 92660-5599.
- What is William Owsley's phone number?
- The practice phone number listed in the NPPES registry for William Owsley is (949) 645-2520.
- Is William Owsley's NPI active?
- Yes — William Owsley's NPI (1003965039) 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.