Quick answers
- Does Hei Ieong Lou accept Medicare assignment?
- Yes. Medicare's clinician data says Hei Ieong Lou 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.
- What is Hei Ieong Lou's NPI number?
- 1225857642. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Hei Ieong Lou works
Medicare's Facility Affiliation Data lists Hei Ieong Lou 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.
- El Camino HealthMountain View, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050308
Practice locations
Addresses where Hei Ieong Lou is enrolled with Medicare (CMS data updated October 2, 2026).
- 525 S Dr, Suite 211Mountain View, CA 94040 (408) 495‑5770
- 827 Altos Oaks Dr, Suite 4Los Altos, CA 94024 (408) 495‑5770
Group practices
Medicare enrollment lists Hei Ieong Lou as a member of this group (CMS data updated October 2, 2026).
- Patricia Sitnitsky PC12 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Mountain View
Clinicians with the same Medicare primary specialty in Mountain View, CA — not a recommendation.
Other clinicians in Patricia Sitnitsky PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| School | University Of California, Davis School Of Medicine |
| Graduation year | 2024 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1225857642 |
| 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
- 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