Quick answers
- Does Wieke H. Liem accept Medicare assignment?
- Yes. Medicare's clinician data says Wieke H. Liem accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Wieke H. Liem see?
- In 2024, CMS data shows 669 Original Medicare patients and 5,970 services for Wieke H. Liem. This counts Original Medicare only and measures volume, not quality.
- What is Wieke H. Liem's NPI number?
- 1164452546. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Wieke H. Liem, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 669 |
|---|---|
| Services billed to Medicare | 5,970 |
| Different services or procedures | 42 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)3,267 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)869 services
- Destruction of precancer skin growth, 1 growth (17000)819 services
- Biopsy of related skin growth, first growth (11102)306 services
- Destruction of skin growth, 1-14 growths (17110)227 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure62%
- Arthritis48%
- Ischemic heart disease24%
- Osteoporosis22%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)18%
Practice locations
Addresses where Wieke H. Liem is enrolled with Medicare (CMS data updated October 2, 2026).
- 17601 17th St, Suite 110Tustin, CA 92780 (714) 790‑0005
Specialties
- Dermatologyprimary
Other dermatologists in Tustin
Clinicians with the same Medicare primary specialty in Tustin, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Irvine, California College Of Medicine |
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1164452546 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians