Nathaniel Tsai
NPI 1144883331 · General Practice Dentistry · Castroville, CA
Enrolled with Medicare as Order and Referring Only - Dentist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathaniel Tsai is a General Practice Dentistry provider in Castroville, CA (NPI 1144883331).
Provider details
- NPI number
- 1144883331
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Dental Providers
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
7 yrs in NPPES registry
- Profile completeness33% of score
83% of core fields populated
- Practice footprint20% of score
3 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin | 33 | 29 |
| Chlorhexidine Gluconate | 26 | 25 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$242 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 923 N Milpas StSanta Barbara, CA 93103-2331Phone: (310) 739-3988
- 9000 Soquel Ave Ste 202Santa Cruz, CA 95062-2097Phone: (831) 359-4768
Registry dates
- Enumerated
- 2019-04-15
- Last updated
- 2020-09-30
- Certified
- 2020-09-30
Frequently asked questions
- What is Nathaniel Tsai's NPI number?
- Nathaniel Tsai's National Provider Identifier (NPI) is 1144883331, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathaniel Tsai's specialty?
- Nathaniel Tsai is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is Nathaniel Tsai located?
- Nathaniel Tsai's practice location on file with NPPES is 11272 Merritt St Ste a, Castroville, CA 95012-3422.
- What is Nathaniel Tsai's phone number?
- The practice phone number listed in the NPPES registry for Nathaniel Tsai is (831) 633-5827.
- Does Nathaniel Tsai accept Medicare?
- Nathaniel Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathaniel Tsai's NPI active?
- Yes — Nathaniel Tsai's NPI (1144883331) is active in the NPPES registry as of the last update on 2020-09-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.