Michael Liu
NPI 1881896520 · Internal Medicine Physician · Anaheim, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Liu is a Internal Medicine Physician provider in Anaheim, CA (NPI 1881896520).
Provider details
- NPI number
- 1881896520
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- A94335 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 55 | 34 |
| Metoprolol Tartrate | 41 | 25 |
| Potassium Chloride | 39 | 30 |
| Cefpodoxime Proxetil | 27 | 26 |
| Atorvastatin Calcium | 26 | 14 |
| Prednisone | 21 | 20 |
| Clopidogrel Bisulfatebrand: Clopidogrel | 20 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$15 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
Registry dates
- Enumerated
- 2007-06-04
- Last updated
- 2021-11-22
- Certified
- 2021-11-22
Frequently asked questions
- What is Michael Liu's NPI number?
- Michael Liu's National Provider Identifier (NPI) is 1881896520, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Liu's specialty?
- Michael Liu is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Liu located?
- Michael Liu's practice location on file with NPPES is 3440 E La Palma Ave, Anaheim, CA 92806-2020.
- What is Michael Liu's phone number?
- The practice phone number listed in the NPPES registry for Michael Liu is (714) 644-2000.
- Does Michael Liu accept Medicare?
- Michael Liu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Liu's NPI active?
- Yes — Michael Liu's NPI (1881896520) is active in the NPPES registry as of the last update on 2021-11-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.