Quick answers
- Which hospitals does William D. Ko work at?
- Medicare's official clinician data lists William D. Ko at 1 hospital: Hackensack Meridian Mountainside Medical. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William D. Ko see patients?
- Medicare's clinician data lists 2 practice locations, including Montclair, NJ and West Caldwell, NJ. Call before your visit to confirm the address.
- What is William D. Ko's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does William D. Ko accept Medicare assignment?
- Medicare's clinician data says William D. Ko may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for William D. Ko?
- (609) 585-8800, as listed in official Medicare / NPI Registry data.
- What is William D. Ko's NPI number?
- 1851496681. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William D. Ko works
Medicare's Facility Affiliation Data lists William D. Ko at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Hackensack Meridian Mountainside MedicalMontclair, NJ · Acute Care Hospital · CCN 310054
Practice locations
Addresses where William D. Ko is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Bay AveMontclair, NJ 07042 (609) 585‑8800
- 11 Rubino RdWest Caldwell, NJ 07006
Group practices
Medicare enrollment lists William D. Ko as a member of this group (CMS data updated 2026-10-02).
- Radiology Affiliates of Central New Jersey PC131 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Montclair
Clinicians with the same Medicare primary specialty in Montclair, NJ — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Boston University School Of Medicine |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1851496681 |
| 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