Quick answers
- Does Shiu-Chung Au accept Medicare assignment?
- Yes. Medicare's clinician data says Shiu-Chung Au 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 Shiu-Chung Au see?
- In 2024, CMS data shows 324 Original Medicare patients and 1,158 services for Shiu-Chung Au. This counts Original Medicare only and measures volume, not quality.
- What is Shiu-Chung Au's NPI number?
- 1841424272. 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 Shiu-Chung Au, 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 | 324 |
|---|---|
| Services billed to Medicare | 1,158 |
| Different services or procedures | 39 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)373 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)202 services
- Biopsy of related skin growth, first growth (11102)115 services
- Destruction of precancer skin growth, 1 growth (17000)112 services
- Destruction of skin growth, 1-14 growths (17110)70 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 cholesterol74%
- High blood pressure71%
- Arthritis40%
- Ischemic heart disease25%
- Diabetes24%
- Anxiety24%
Hospitals where Shiu-Chung Au works
Medicare's Facility Affiliation Data lists Shiu-Chung Au 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.
- Milford Regional Medical CenterMilford, MA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 220090
Practice locations
Addresses where Shiu-Chung Au is enrolled with Medicare (CMS data updated October 2, 2026).
- 11 Apex Dr, Suite 103aMarlborough, MA 01752
Group practices
Medicare enrollment lists Shiu-Chung Au as a member of this group (CMS data updated October 2, 2026).
- Louis Kuchnir MD PC17 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in Marlborough
Clinicians with the same Medicare primary specialty in Marlborough, MA — not a recommendation.
Other clinicians in Louis Kuchnir MD PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2009 (17 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841424272 |
| 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