Quick answers
- Which hospitals does John H. Karan work at?
- Medicare's official clinician data lists John H. Karan at 5 hospitals: Alta Bates Summit Medical Center, Contra Costa Regional Medical Center, John Muir Medical Center - Walnut Creek Campus, San Ramon Regional Medical Center and Sutter Delta Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John H. Karan see patients?
- Medicare's clinician data lists 1 practice location in Antioch, CA. Call before your visit to confirm the address.
- What is John H. Karan's specialty?
- Medicare lists Neurology as the primary specialty.
- Does John H. Karan accept Medicare assignment?
- Yes. Medicare's clinician data says John H. Karan 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 John H. Karan offer telehealth?
- Medicare's clinician data says John H. Karan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John H. Karan?
- (925) 755-9500, as listed in official Medicare / NPI Registry data.
- What is John H. Karan's NPI number?
- 1720007545. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John H. Karan works
Medicare's Facility Affiliation Data lists John H. Karan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Alta Bates Summit Medical CenterOakland, CA · Acute Care Hospital · CCN 050043
- Contra Costa Regional Medical CenterMartinez, CA · Acute Care Hospital · CCN 050276
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · CCN 050180
- San Ramon Regional Medical CenterSan Ramon, CA · Acute Care Hospital · CCN 050689
- Sutter Delta Medical CenterAntioch, CA · Acute Care Hospital · CCN 050523
Practice locations
Addresses where John H. Karan is enrolled with Medicare (CMS data updated 2026-10-02).
- 3012 Lone Tree Way, Suite 300Antioch, CA 94509 (925) 755‑9500
Specialties
- Neurologyprimary
Other neurologists in Antioch
Clinicians with the same Medicare primary specialty in Antioch, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1720007545 |
| 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