Quick answers
- Does Supannee Rassameehiran accept Medicare assignment?
- Yes. Medicare's clinician data says Supannee Rassameehiran 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 Supannee Rassameehiran see?
- In 2024, CMS data shows 293 Original Medicare patients and 535 services for Supannee Rassameehiran. This counts Original Medicare only and measures volume, not quality.
- What is Supannee Rassameehiran's NPI number?
- 1538500244. 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 Supannee Rassameehiran, 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 | 293 |
|---|---|
| Services billed to Medicare | 535 |
| Different services or procedures | 38 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)97 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)84 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)83 services
- Biopsy of large bowel using a flexible endoscope (45380)49 services
- Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)47 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 cholesterol70%
- Arthritis47%
- Ischemic heart disease33%
- Diabetes32%
- Chronic kidney disease31%
Hospitals where Supannee Rassameehiran works
Medicare's Facility Affiliation Data lists Supannee Rassameehiran 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.
- Guam Regional Medical CityDededo, GU · Acute Care Hospital · Emergency services: listed by Medicare · CCN 650003
Practice locations
Addresses where Supannee Rassameehiran is enrolled with Medicare (CMS data updated October 2, 2026).
- 133 Route 3Dededo, GU 96929 (671) 645‑5500
Group practices
Medicare enrollment lists Supannee Rassameehiran as a member of this group (CMS data updated October 2, 2026).
- Guam Healthcare Development Incorporated207 clinicians in the group
Specialties
- Gastroenterologyprimary
Other clinicians in Guam Healthcare Development Incorporated
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2010 (16 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538500244 |
| 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