William Li, MD
NPI 1154703940 · Critical Care Medicine (Internal Medicine) Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Li, MD is a Critical Care Medicine (Internal Medicine) Physician provider in Los Angeles, CA (NPI 1154703940).
Provider details
- NPI number
- 1154703940
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A150608 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,530 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 798 | $217 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 366 | $84 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 229 | $124 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 53 | $184 |
| Insertion of Non-Tunneled Central Venous Tube for Infusion (5 Years Or Older)36556 | 37 | $84 |
| Emergent Insertion of Breathing Tube Into Windpipe Using an Endoscope31500 | 19 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$376 across 15 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)
- 111 West La Palma AveAnaheim, CA 92801Phone: (714) 774-1450
- 450 Clarkson AveBrooklyn, NY 11203Phone: (718) 270-2030
Registry dates
- Enumerated
- 2015-06-29
- Last updated
- 2022-03-22
- Certified
- 2022-03-09
Frequently asked questions
- What is William Li's NPI number?
- William Li's National Provider Identifier (NPI) is 1154703940, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Li's specialty?
- William Li is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is William Li located?
- William Li's practice location on file with NPPES is 1225 Wilshire Blvd, Los Angeles, CA 90017-1901.
- What is William Li's phone number?
- The practice phone number listed in the NPPES registry for William Li is (213) 977-2121.
- Does William Li accept Medicare?
- William Li is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Li's NPI active?
- Yes — William Li's NPI (1154703940) is active in the NPPES registry as of the last update on 2022-03-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.