Individual Healthcare Provider
Nathaniel Tsai
Provider's NPPES record last updated: September 30, 2020
Overview
- Entity Type
- Individual Healthcare Provider
- NPI
- 1144883331
- Primary Specialty
- Dentist — General Practice
- Practice Location
- Castroville, California
- Sole Proprietor
- Yes
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 19, 2026, 2:06 AM 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
Dentist
General Practice
Dental Providers
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.
Taxonomy code 1223G0001X Student in an Organized Health Care Education/Training Program
Student, Health Care
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Taxonomy code 390200000X
Provider-Reported License Information
- Dentist (California)
- DDS104615
Practice Locations
Practice Location
11272 Merritt St Ste A
Castroville, California 95012-3422
Phone: (831) 633-5827
Additional Practice Location
9000 Soquel Ave Ste 202
Santa Cruz, California 95062-2097
Phone: (831) 359-4768
Additional Practice Location
923 N Milpas St
Santa Barbara, California 93103-2331
Phone: (310) 739-3988
Record Information
- Enumeration Date
- April 15, 2019
- Provider's NPPES Record Last Updated
- September 30, 2020
- Certification Date
- September 30, 2020
- NPISignal NPPES Dataset
- August 2026
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