Tzu-Jen Tzao, M.D.
NPI 1548453814 · Emergency Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tzu-Jen Tzao, M.D. is a Emergency Medicine Physician provider in Los Angeles, CA (NPI 1548453814).
Provider details
- NPI number
- 1548453814
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A96855 (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 tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
36 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 23 | $184 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 13 | $126 |
Typical Medicare-allowed amounts for these services range $126–$184 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 12746 W Jefferson Blvd Ste 2000Playa Vista, CA 90094-2776Phone: (424) 315-2220Fax: (424) 315-2221
Registry dates
- Enumerated
- 2007-08-21
- Last updated
- 2025-06-18
- Certified
- 2025-06-18
Frequently asked questions
- What is Tzu-Jen Tzao's NPI number?
- Tzu-Jen Tzao's National Provider Identifier (NPI) is 1548453814, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tzu-Jen Tzao's specialty?
- Tzu-Jen Tzao is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tzu-Jen Tzao located?
- Tzu-Jen Tzao's practice location on file with NPPES is 1680 E 120th St, Los Angeles, CA 90059-3026.
- What is Tzu-Jen Tzao's phone number?
- The practice phone number listed in the NPPES registry for Tzu-Jen Tzao is (424) 338-8144.
- Does Tzu-Jen Tzao accept Medicare?
- Tzu-Jen Tzao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tzu-Jen Tzao's NPI active?
- Yes — Tzu-Jen Tzao's NPI (1548453814) is active in the NPPES registry as of the last update on 2025-06-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.