Iris Liou, MD
NPI 1427163542 · Gastroenterology Physician · Seattle, WA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Iris Liou, MD is a Gastroenterology Physician provider in Seattle, WA (NPI 1427163542).
Provider details
- NPI number
- 1427163542
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD00042419 (WA)
Specialties & taxonomies
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
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
204 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 94 | $157 |
| 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 | 44 | $18 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 26 | $130 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 23 | $86 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 17 | $199 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tacrolimus | 243 | 80 |
| Mycophenolate Mofetil | 73 | 31 |
| Entecavir | 66 | 17 |
| Ursodiol | 50 | 19 |
| Tenofovir Alafenamidebrand: Vemlidy | 40 | — |
| Prednisone | 36 | 11 |
| Cyclosporine, Modifiedbrand: Cyclosporine Modified | 26 | 13 |
| Azathioprine |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-20
- Last updated
- 2013-06-05
Frequently asked questions
- What is Iris Liou's NPI number?
- Iris Liou's National Provider Identifier (NPI) is 1427163542, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Iris Liou's specialty?
- Iris Liou is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Iris Liou located?
- Iris Liou's practice location on file with NPPES is 1959 Ne Pacific St, Seattle, WA 98195-6175.
- What is Iris Liou's phone number?
- The practice phone number listed in the NPPES registry for Iris Liou is (206) 598-4377.
- Does Iris Liou accept Medicare?
- Iris Liou is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Iris Liou's NPI active?
- Yes — Iris Liou's NPI (1427163542) is active in the NPPES registry as of the last update on 2013-06-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.