Quick answers
- Where does John Isaac see patients?
- Medicare's clinician data lists 3 practice locations, including Johnson City, TN and Newport News, VA. Call before your visit to confirm the address.
- What is John Isaac's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does John Isaac accept Medicare assignment?
- Yes. Medicare's clinician data says John Isaac 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.
- What is John Isaac's NPI number?
- 1225037435. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where John Isaac is enrolled with Medicare (CMS data updated 2026-10-02).
- 1021 W Oakland Ave, Suite 310Johnson City, TN 37604
- 509 Med Tech Pkwy, Suite 100Johnson City, TN 37604
- 856 J Clyde Morris Blvd, Suite ANewport News, VA 23601
Specialties
- General Surgeryprimary
Other general surgeons in Johnson City
Clinicians with the same Medicare primary specialty in Johnson City, TN — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1225037435 |
| 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
- 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