Individual Healthcare Provider
Clay Hughes Napper, M.D.
Provider's NPPES record last updated: March 19, 2021
Overview
- Entity Type
- Individual Healthcare Provider
- NPI
- 1053352815
- Primary Specialty
- Radiology — Diagnostic Radiology
- Practice Location
- San Mateo, California
- Sole Proprietor
- No
Federal Screening
NPISignal checked this NPI against federal exclusion sources. Results below are based on the NPI number itself — an identifier match, not a name match.
List of Excluded Individuals/Entities (LEIE)
HHS Office of Inspector General
No potential match was identified in NPISignal's indexed List of Excluded Individuals/Entities (LEIE) records as of 2026-09-10.
- Source data
- September 10, 2026
- Records indexed
- 84,001
- Screened
- Sep 18, 2026, 4:31 PM UTC
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
SAM.gov Exclusions
U.S. General Services Administration
SAM.gov Exclusions was not checked.
SAM.gov screening is not configured on this deployment. No SAM check has been performed.
- Screened
- Not checked
This is an NPI-based check only. NPISignal does not publish name-based exclusion matches on a provider profile. A shared or similar name is a lead that requires human review, not an identification, and this page is not the place to make one. Run a name-based screening below to see potential matches with the reasons for each.
This reflects only the records NPISignal currently holds and the identity information supplied. It is not a verification of eligibility, licensure, or compliance. Verify decisions that matter against the authoritative source.
Searches OIG LEIE and SAM.gov by name and reviews every potential match.
Specialties & Taxonomies
- Primary
Radiology
Diagnostic Radiology
Allopathic & Osteopathic Physicians
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
Taxonomy code 2085R0202X
Provider-Reported License Information
- Radiology (California)
- G78045
Practice Locations
Practice Location
100 S San Mateo Dr
San Mateo, California 94401-3805
Phone: (650) 696-4515
Additional Practice Location
935 El Camino Real
South San Francisco, California 94080-3203
Phone: (650) 873-1050
Fax: (650) 873-2174
Additional Practice Location
1720 El Camino Real Ste 118
Burlingame, California 94010-3225
Phone: (650) 696-7850
Fax: (650) 696-3677
Additional Practice Location
1501 Trousdale Dr
Burlingame, California 94010-4506
Phone: (650) 696-5515
Fax: (650) 696-5280
Additional Practice Location
222 W 39th Ave
San Mateo, California 94403-4364
Phone: (650) 573-2222
Fax: (650) 573-2122
Record Information
- Enumeration Date
- June 10, 2006
- Provider's NPPES Record Last Updated
- March 19, 2021
- Certification Date
- March 18, 2021
- NPISignal NPPES Dataset
- August 2026
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