Quick answers
- Which hospitals does William E. Karnes Jr. work at?
- Medicare's official clinician data lists William E. Karnes Jr. at 1 hospital: UCI Health-Orange. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William E. Karnes Jr. see patients?
- Medicare's clinician data lists 1 practice location in Orange, CA. Call before your visit to confirm the address.
- What is William E. Karnes Jr.'s specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Gastroenterology.
- Does William E. Karnes Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says William E. Karnes Jr. 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 William E. Karnes Jr. offer telehealth?
- Medicare's clinician data says William E. Karnes Jr. offers telehealth services. Ask the office which visits can be done by video or phone.
- What is William E. Karnes Jr.'s NPI number?
- 1881652998. 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 E. Karnes Jr. works
Medicare's Facility Affiliation Data lists William E. Karnes Jr. at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- UCI Health-OrangeOrange, CA · Acute Care Hospital · CCN 050348
Practice locations
Addresses where William E. Karnes Jr. is enrolled with Medicare (CMS data updated 2026-10-02).
- 101 the City Dr SOrange, CA 92868
Group practices
Medicare enrollment lists William E. Karnes Jr. as a member of this group (CMS data updated 2026-10-02).
- UC Regents319 clinicians in the group
Specialties
- Internal Medicineprimary
- Gastroenterologyalso
Other internal medicine doctors in Orange
Clinicians with the same Medicare primary specialty in Orange, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Minnesota Medical School |
| Graduation year | 1982 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1881652998 |
| 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