Peter Liao, MD, PHD
NPI 1790312189 · Psychiatry Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Liao, MD, PHD is a Psychiatry Physician provider in Los Angeles, CA (NPI 1790312189).
Provider details
- NPI number
- 1790312189
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- A178622 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
6 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
338 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) |
|---|---|---|
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 295 | $55 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 23 | $92 |
| Initial Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 40 Minutes99221 | 20 | $91 |
Typical Medicare-allowed amounts for these services range $55–$92 (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
Registry dates
- Enumerated
- 2020-03-25
- Last updated
- 2023-08-29
- Certified
- 2023-08-29
Frequently asked questions
- What is Peter Liao's NPI number?
- Peter Liao's National Provider Identifier (NPI) is 1790312189, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Liao's specialty?
- Peter Liao is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Liao located?
- Peter Liao's practice location on file with NPPES is 1200 N State Street, Los Angeles, CA 90033-1029.
- What is Peter Liao's phone number?
- The practice phone number listed in the NPPES registry for Peter Liao is (323) 409-1000.
- Does Peter Liao accept Medicare?
- Peter Liao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Liao's NPI active?
- Yes — Peter Liao's NPI (1790312189) is active in the NPPES registry as of the last update on 2023-08-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.