William Mahoney, P.A.
NPI 1851331854 · Physician Assistant · Whittier, CA
William Mahoney, P.A. is a Physician Assistant provider in Whittier, CA (NPI 1851331854).
Provider details
- NPI number
- 1851331854
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.
- Sex
- Male
- Sole proprietor
- No
- License
- PA11927 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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
- 2006-06-07
- Last updated
- 2011-04-29
Frequently asked questions
- What is William Mahoney's NPI number?
- William Mahoney's National Provider Identifier (NPI) is 1851331854, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mahoney's specialty?
- William Mahoney is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Mahoney located?
- William Mahoney's practice location on file with NPPES is 15725 Whittier Blvd, Whittier, CA 90603-2347.
- What is William Mahoney's phone number?
- The practice phone number listed in the NPPES registry for William Mahoney is (562) 947-0059.
- Is William Mahoney's NPI active?
- Yes — William Mahoney's NPI (1851331854) is active in the NPPES registry as of the last update on 2011-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.