Quick answers
- Does Ku Juey R. Chang accept Medicare assignment?
- Yes. Medicare's clinician data says Ku Juey R. Chang 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 Ku Juey R. Chang see?
- In 2024, CMS data shows 376 Original Medicare patients and 22,214 services for Ku Juey R. Chang. This counts Original Medicare only and measures volume, not quality.
- What is Ku Juey R. Chang's NPI number?
- 1689611337. 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 Ku Juey R. Chang, 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 | 376 |
|---|---|
| Services billed to Medicare | 22,214 |
| Different services or procedures | 73 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month (99490)941 services
- Insertion of needle into vein for collection of blood sample (36415)848 services
- Blood test, basic group of blood chemicals (calcium, total) (80048)835 services
- Phosphate level (84100)827 services
- Magnesium level (83735)826 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 blood pressure75%
- High cholesterol75%
- Chronic kidney disease56%
- Diabetes51%
- Arthritis45%
- Ischemic heart disease28%
Hospitals where Ku Juey R. Chang works
Medicare's Facility Affiliation Data lists Ku Juey R. Chang at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Memorialcare Saddleback Medical CenterLaguna Hills, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050603
- Providence Mission HospitalMission Viejo, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050567
Practice locations
Addresses where Ku Juey R. Chang is enrolled with Medicare (CMS data updated October 2, 2026).
- 23141 Moulton Pkwy, Suite 102Laguna Hills, CA 92653 (949) 916‑9100
Group practices
Medicare enrollment lists Ku Juey R. Chang as a member of this group (CMS data updated October 2, 2026).
- Scke Inc22 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in Laguna Hills
Clinicians with the same Medicare primary specialty in Laguna Hills, CA — not a recommendation.
Other clinicians in Scke Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Minnesota Medical School |
| Graduation year | 1993 (33 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1689611337 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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