Merrick Tsai, MD, FNP-BC, FNP-C
NPI 1366012791 · Psychiatric/Mental Health Nurse Practitioner · Highland, CA
Merrick Tsai, MD, FNP-BC, FNP-C is a Psychiatric/Mental Health Nurse Practitioner provider in Highland, CA (NPI 1366012791).
Provider details
- NPI number
- 1366012791
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MD, FNP-BC, FNP-C
- Sex
- Male
- Sole proprietor
- Yes
- License
- APRN11020654 (FL)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
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
4 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.
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 |
|---|---|---|
| Ondansetron Hcl | 29 | 28 |
| Escitalopram Oxalate | 13 | — |
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-06-28
- Last updated
- 2024-08-23
- Certified
- 2024-08-23
Frequently asked questions
- What is Merrick Tsai's NPI number?
- Merrick Tsai's National Provider Identifier (NPI) is 1366012791, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Merrick Tsai's specialty?
- Merrick Tsai is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Merrick Tsai located?
- Merrick Tsai's practice location on file with NPPES is 28839 Lemon St, Highland, CA 92346-5386.
- What is Merrick Tsai's phone number?
- The practice phone number listed in the NPPES registry for Merrick Tsai is (909) 742-9889.
- Is Merrick Tsai's NPI active?
- Yes — Merrick Tsai's NPI (1366012791) is active in the NPPES registry as of the last update on 2024-08-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.