Quick answers
- Which hospitals does Mary J. Ninan work at?
- Medicare's official clinician data lists Mary J. Ninan at 5 hospitals: Northside Hospital, Northside Hospital Cherokee, Northside Hospital Duluth, Northside Hospital Forsyth and Northside Hospital Gwinnett. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mary J. Ninan see patients?
- Medicare's clinician data lists 2 practice locations, including Alpharetta, GA and Duluth, GA. Call before your visit to confirm the address.
- What is Mary J. Ninan's specialty?
- Medicare lists Medical Oncology as the primary specialty, and also Hematology.
- Does Mary J. Ninan accept Medicare assignment?
- Yes. Medicare's clinician data says Mary J. Ninan 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 Mary J. Ninan offer telehealth?
- Medicare's clinician data says Mary J. Ninan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mary J. Ninan?
- (678) 566-6995, as listed in official Medicare / NPI Registry data.
- What is Mary J. Ninan's NPI number?
- 1356533145. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mary J. Ninan works
Medicare's Facility Affiliation Data lists Mary J. Ninan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northside HospitalAtlanta, GA · Acute Care Hospital · CCN 110161
- Northside Hospital CherokeeCanton, GA · Acute Care Hospital · CCN 110008
- Northside Hospital DuluthDuluth, GA · Acute Care Hospital · CCN 110252
- Northside Hospital ForsythCumming, GA · Acute Care Hospital · CCN 110005
- Northside Hospital GwinnettLawrenceville, GA · Acute Care Hospital · CCN 110087
Practice locations
Addresses where Mary J. Ninan is enrolled with Medicare (CMS data updated 2026-10-02).
- 3330 Preston Ridge Rd, Suite 110Alpharetta, GA 30005 (678) 566‑6995
- 6300 Hospital Pkwy, Suite 300Duluth, GA 30097 (770) 623‑8965
Group practices
Medicare enrollment lists Mary J. Ninan as a member of this group (CMS data updated 2026-10-02).
- NSH Cancer Institute Professional Services G LLC119 clinicians in the group
Specialties
- Medical Oncologyprimary
- Hematologyalso
Other oncologists in Georgia
Clinicians with the same Medicare primary specialty in Georgia — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1999 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1356533145 |
| 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