William John Owsley, M.D.
Otolaryngology Physician · Newport Beach, CA
William John Owsley, M.D. is an otolaryngology physician with a practice address in Newport Beach, California, and NPI 1003965039, issued on Jan 9, 2007. Check the license (California C33164, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William John Owsley
- Credential
- M.D.
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- C33164 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2011 Westcliff Dr, Newport Beach, CA 92660
- Phone
- (949) 645-2520
- Enumerated
- Jan 9, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (949) 645-3502
- Entity
- Type 1 · individual
Also registered at 2011 Westcliff Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Loula Amin, M.D.Allergy & Immunology Physician1043452782
- John Anderson, DDSDentist1649375387
- Sean Bahri, MDOphthalmology Physician1821273137
- Julie Ralls, M.D.Family Medicine Physician1558445965
- Frank Rich, DDSGeneral Practice Dentistry1891916136
- Marshall Young, D.D.S.General Practice Dentistry1356561286
Verify William John Owsley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C33164Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Otolaryngology Physician providers in California
There are 1,212 otolaryngology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other otolaryngology physician records in California
- Arman Abdalkhani, MDPalo Alto, CA1356536130
- Abdul-Rahman Abdel-ReheemLos Angeles, CA1831770437
- Ahmed AbdelmeguidPalo Alto, CA1447744180
- Rami Abdou, M.D.Santa Rosa, CA1700143013
- Eric AbelloOrange, CA1922566215
- Mohamed Aboueisha, MDLos Angeles, CA1316678881
- Marianne Abouyared, M.D.Sacramento, CA1235472200
- Norton Abramson, M.D.San Clemente, CA1356488696
- Basil Adad, MDWalnut Creek, CA1487732574
- Brett Adams, MDStockton, CA1407934227
Common questions
What is William John Owsley, M.D.'s NPI number?
William John Owsley, M.D.'s National Provider Identifier (NPI) is 1003965039, issued on Jan 9, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William John Owsley, M.D. located?
The NPPES record lists a practice address at 2011 Westcliff Dr, Newport Beach, CA, 92660. Phone: (949) 645-2520. Providers update this record themselves, so call before visiting.
How can I verify William John Owsley, M.D.'s license?
NPPES lists California license number C33164, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.