Earl Tso, M.D.
NPI 1831121474 · Internal Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Earl Tso, M.D. is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1831121474).
Provider details
- NPI number
- 1831121474
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G069506 (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 · 16 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Losartan Potassium | 32 |
| Amlodipine Besylate | 31 |
| Atorvastatin Calcium | 29 |
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 25 |
| Dolutegravir/Rilpivirinebrand: Juluca | 24 |
| Tamsulosin Hcl | 20 |
| Hydrochlorothiazide | 19 |
| Abacavir/Dolutegravir/Lamivudibrand: Triumeq | 15 |
| Hydroxyzine Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$108 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
- 2006-07-06
- Last updated
- 2007-07-08
Frequently asked questions
- What is Earl Tso's NPI number?
- Earl Tso's National Provider Identifier (NPI) is 1831121474, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Earl Tso's specialty?
- Earl Tso is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Earl Tso located?
- Earl Tso's practice location on file with NPPES is 351 E Temple St, Los Angeles, CA 90012-3328.
- What is Earl Tso's phone number?
- The practice phone number listed in the NPPES registry for Earl Tso is (213) 253-2677.
- Does Earl Tso accept Medicare?
- Earl Tso is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Earl Tso's NPI active?
- Yes — Earl Tso's NPI (1831121474) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.