Quick answers
- Which hospitals does Marcus J. Ko work at?
- Medicare's official clinician data lists Marcus J. Ko at 5 hospitals: Barton Memorial Hospital, Carson Tahoe Regional Medical Center, Carson Valley Health, Renown Regional Medical Center and Tahoe Forest Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marcus J. Ko see patients?
- Medicare's clinician data lists 2 practice locations, including Honolulu, HI and Reno, NV. Call before your visit to confirm the address.
- What is Marcus J. Ko's specialty?
- Medicare lists Ophthalmology as the primary specialty.
- Does Marcus J. Ko accept Medicare assignment?
- Yes. Medicare's clinician data says Marcus J. Ko accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Marcus J. Ko offer telehealth?
- Medicare's clinician data says Marcus J. Ko offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Marcus J. Ko?
- (808) 599-4755, as listed in official Medicare / NPI Registry data.
- What is Marcus J. Ko's NPI number?
- 1235302183. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marcus J. Ko works
Medicare's Facility Affiliation Data lists Marcus J. Ko at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Barton Memorial HospitalSouth Lake Tahoe, CA · Acute Care Hospital · CCN 050352
- Carson Tahoe Regional Medical CenterCarson City, NV · Acute Care Hospital · CCN 290019
- Carson Valley HealthGardnerville, NV · Critical Access Hospital · CCN 291306
- Renown Regional Medical CenterReno, NV · Acute Care Hospital · CCN 290001
- Tahoe Forest HospitalTruckee, CA · Critical Access Hospital · CCN 051328
Practice locations
Addresses where Marcus J. Ko is enrolled with Medicare (CMS data updated 2026-10-02).
- 1380 Lusitana St, Suite 708Honolulu, HI 96813 (808) 599‑4755
- 5435 Reno Corporate Dr, Suite 100Reno, NV 89511 (775) 322‑3311
Group practices
Medicare enrollment lists Marcus J. Ko as a member of these groups (CMS data updated 2026-10-02).
- Marcus J Ko MD PLLC3 clinicians in the group
- Timothy F. McDevitt, M.D. Inc3 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Honolulu
Clinicians with the same Medicare primary specialty in Honolulu, HI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1235302183 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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