William Shanahan, MD
NPI 1013991116 · Diagnostic Radiology Physician · Whittier, CA
William Shanahan, MD is a Diagnostic Radiology Physician provider in Whittier, CA (NPI 1013991116).
Provider details
- NPI number
- 1013991116
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G41618 (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
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
- 2005-12-01
- Last updated
- 2012-08-13
Frequently asked questions
- What is William Shanahan's NPI number?
- William Shanahan's National Provider Identifier (NPI) is 1013991116, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Shanahan's specialty?
- William Shanahan is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is William Shanahan located?
- William Shanahan's practice location on file with NPPES is 12401 East Washington Blvd., Whittier, CA 90602-1006.
- What is William Shanahan's phone number?
- The practice phone number listed in the NPPES registry for William Shanahan is (562) 698-0811.
- Is William Shanahan's NPI active?
- Yes — William Shanahan's NPI (1013991116) is active in the NPPES registry as of the last update on 2012-08-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.