Quick answers
- Does Kok Chye Tan accept Medicare assignment?
- Yes. Medicare's clinician data says Kok Chye Tan 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 Kok Chye Tan see?
- In 2024, CMS data shows 12,075 Original Medicare patients and 27,654 services for Kok Chye Tan. This counts Original Medicare only and measures volume, not quality.
- What is Kok Chye Tan's NPI number?
- 1891974283. 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 Kok Chye Tan, 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 | 12,075 |
|---|---|
| Services billed to Medicare | 27,654 |
| Different services or procedures | 228 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- X-ray of chest, 1 view (71045)14,984 services
- X-ray of abdomen, 1 view (74018)2,622 services
- Ct scan head or brain without contrast (70450)1,943 services
- Ct scan of chest without contrast (71250)522 services
- Ultrasound study of arm or leg veins with compression and maneuvers (93970)352 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%
- Diabetes64%
- Arthritis59%
- Chronic kidney disease57%
- Heart failure52%
Hospitals where Kok Chye Tan works
Medicare's Facility Affiliation Data lists Kok Chye Tan 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.
- Alhambra Hospital Medical CenterAlhambra, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 050281
- Garfield Medical CenterMonterey Park, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050737
- Los Angeles Community HospitalLos Angeles, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050663
- San Gabriel Valley Medical CenterSan Gabriel, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050132
- Southern California Hospital at HollywoodHollywood, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050135
Practice locations
Addresses where Kok Chye Tan is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 10; the Medicare profile lists all.
- 100 S Raymond AveAlhambra, CA 91801 (626) 570‑1606
- 1075 Meade AveSan Diego, CA 92116 (626) 282‑0296
- 1701 Santa Anita AveSouth El Monte, CA 91733 (626) 350‑7937
- 2400 E 4th StNational City, CA 91950 (626) 282‑0296
- 3865 Jackson StRiverside, CA 92503 (626) 698‑7246
Group practices
Medicare enrollment lists Kok Chye Tan as a member of these groups (CMS data updated October 2, 2026).
- Mountain Communities Healthcare District29 clinicians in the group
- KC Tan MD Medical Corporation24 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Alhambra
Clinicians with the same Medicare primary specialty in Alhambra, CA — not a recommendation.
Other clinicians in Mountain Communities Healthcare District
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2011 (15 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891974283 |
| 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