Monica Tsai
NPI 1598176497 · Allergy & Immunology (Internal Medicine) Physician · Orange, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Monica Tsai is a Allergy & Immunology (Internal Medicine) Physician provider in Orange, CA (NPI 1598176497).
Provider details
- NPI number
- 1598176497
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- A142506 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
12 yrs in NPPES registry
- Profile completeness33% of score
100% 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$128 across 1 record (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)
- 1245 16th St Ste 303Santa Monica, CA 90404-1265Phone: (310) 481-4646Fax: (310) 899-7599
- 3500 Lomita Blvd Ste 300Torrance, CA 90505-5038Phone: (310) 257-0028Fax: (310) 227-0031
Registry dates
- Enumerated
- 2014-05-13
- Last updated
- 2026-01-16
- Certified
- 2026-01-16
Frequently asked questions
- What is Monica Tsai's NPI number?
- Monica Tsai's National Provider Identifier (NPI) is 1598176497, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Monica Tsai's specialty?
- Monica Tsai is listed in the NPPES registry with a primary specialty of Allergy & Immunology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Monica Tsai located?
- Monica Tsai's practice location on file with NPPES is 101 the City Dr S, Orange, CA 92868-3201.
- What is Monica Tsai's phone number?
- The practice phone number listed in the NPPES registry for Monica Tsai is (714) 456-8888.
- Does Monica Tsai accept Medicare?
- Monica Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Monica Tsai's NPI active?
- Yes — Monica Tsai's NPI (1598176497) is active in the NPPES registry as of the last update on 2026-01-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.