Quick answers
- Which hospitals does Derek Chan work at?
- Medicare's official clinician data lists Derek Chan at 3 hospitals: Eagle Butte Indian Health Service Hospital, P H S Indian Hospital Crow / Northern Cheyenne and P H S Indian Hospital-Ft Belknap at Harlem - CAH. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Derek Chan see patients?
- Medicare's clinician data lists 5 practice locations, including Crow Agency, MT, Eagle Butte, SD and New York, NY. Call before your visit to confirm the address.
- What is Derek Chan's specialty?
- Medicare lists Dermatology as the primary specialty.
- Does Derek Chan accept Medicare assignment?
- Yes. Medicare's clinician data says Derek Chan 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 Derek Chan offer telehealth?
- Medicare's clinician data says Derek Chan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Derek Chan?
- (406) 638-4616, as listed in official Medicare / NPI Registry data.
- What is Derek Chan's NPI number?
- 1932488574. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Derek Chan works
Medicare's Facility Affiliation Data lists Derek Chan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Eagle Butte Indian Health Service HospitalEagle Butte, SD · Critical Access Hospital · CCN 431383
- P H S Indian Hospital Crow / Northern CheyenneCrow Agency, MT · Critical Access Hospital · CCN 271339
- P H S Indian Hospital-Ft Belknap at Harlem - CAHHarlem, MT · Critical Access Hospital · CCN 271315
Practice locations
Addresses where Derek Chan is enrolled with Medicare (CMS data updated 2026-10-02).
- 10110 S 7650Crow Agency, MT 59022 (406) 638‑4616
- 10110 S 7650, P.O. Box 9Crow Agency, MT 59022
- 24276 166th Airport RdEagle Butte, SD 57625
- 245 5th Ave, Fl 3New York, NY 10016 (212) 606‑3780
- PO Box, Suite 1012Eagle Butte, SD 57625
Group practices
Medicare enrollment lists Derek Chan as a member of these groups (CMS data updated 2026-10-02).
- US Health Dept of Health and Human Services94 clinicians in the group
- Eagle Butte Indian Health Service Hospital42 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in Montana
Clinicians with the same Medicare primary specialty in Montana — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Boston University School Of Medicine |
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1932488574 |
| 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