Richard Tsai, MD
NPI 1558387555 · Internal Medicine Physician · Portland, OR
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Richard Tsai, MD is a Internal Medicine Physician provider in Portland, OR (NPI 1558387555).
Provider details
- NPI number
- 1558387555
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD22952 (OR)
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
19 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
648 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 143 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 115 | $73 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 115 | $46 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 78 | $85 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 62 | $108 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 134 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 742 | 215 |
| Amlodipine Besylate | 350 | 95 |
| Levothyroxine Sodium | 346 | 102 |
| Lisinopril | 255 | 80 |
| Tamsulosin Hcl | 222 | 67 |
| Losartan Potassium | 207 | 63 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-14
- Last updated
- 2021-03-25
- Certified
- 2021-03-25
Frequently asked questions
- What is Richard Tsai's NPI number?
- Richard Tsai's National Provider Identifier (NPI) is 1558387555, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Richard Tsai's specialty?
- Richard Tsai is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Richard Tsai located?
- Richard Tsai's practice location on file with NPPES is 417 Sw 117th Ave, Portland, OR 97225-5924.
- What is Richard Tsai's phone number?
- The practice phone number listed in the NPPES registry for Richard Tsai is (503) 216-9400.
- Does Richard Tsai accept Medicare?
- Richard Tsai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Richard Tsai's NPI active?
- Yes — Richard Tsai's NPI (1558387555) is active in the NPPES registry as of the last update on 2021-03-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.