Ronald Tsao, M.D.
NPI 1770802746 · Internal Medicine Physician · Redondo Beach, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ronald Tsao, M.D. is a Internal Medicine Physician provider in Redondo Beach, CA (NPI 1770802746).
Provider details
- NPI number
- 1770802746
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A138271 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
16 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
805 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 340 | $98 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 87 | $85 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 82 | $50 |
| Aspiration And/Or Injection of Fluid From Large Joint20610 | 73 | $82 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 61 | $9 |
| Administration of Influenza Virus VaccineG0008 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 47 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 274 | 84 |
| Amlodipine Besylate | 149 | 44 |
| Losartan Potassium | 107 | 33 |
| Hydrochlorothiazide | 63 | 18 |
| Levothyroxine Sodium | 57 | 17 |
| Rosuvastatin Calcium | 52 | 15 |
| Tamsulosin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-05-28
- Last updated
- 2017-10-13
Frequently asked questions
- What is Ronald Tsao's NPI number?
- Ronald Tsao's National Provider Identifier (NPI) is 1770802746, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ronald Tsao's specialty?
- Ronald Tsao is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ronald Tsao located?
- Ronald Tsao's practice location on file with NPPES is 514 N Prospect Ave, Redondo Beach, CA 90277-3036.
- What is Ronald Tsao's phone number?
- The practice phone number listed in the NPPES registry for Ronald Tsao is (310) 937-8555.
- Does Ronald Tsao accept Medicare?
- Ronald Tsao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ronald Tsao's NPI active?
- Yes — Ronald Tsao's NPI (1770802746) is active in the NPPES registry as of the last update on 2017-10-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.