Quick answers
- Where does Mark D. Hennessy see patients?
- Medicare's clinician data lists 3 practice locations, including La Follette, TN, Knoxville, TN and Cookeville, TN. Call before your visit to confirm the address.
- What is Mark D. Hennessy's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Mark D. Hennessy accept Medicare assignment?
- Yes. Medicare's clinician data says Mark D. Hennessy 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 the phone number for Mark D. Hennessy?
- (865) 263-2400, as listed in official Medicare / NPI Registry data.
- What is Mark D. Hennessy's NPI number?
- 1194710467. 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 Mark D. Hennessy is enrolled with Medicare (CMS data updated 2026-10-02).
- 109 Independence Ln, Suite 500La Follette, TN 37766 (865) 263‑2400
- 1930 Alcoa Hwy, Suite A435Knoxville, TN 37920 (865) 263‑2400
- 225 N Willow Ave, Suite 8Cookeville, TN 38501 (865) 263‑2400
Group practices
Medicare enrollment lists Mark D. Hennessy as a member of this group (CMS data updated 2026-10-02).
- High Risk Obstetrical Consultants, PLLC11 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Tennessee
Clinicians with the same Medicare primary specialty in Tennessee — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194710467 |
| 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