Quick answers
- Which hospitals does Hillary C. Grainer work at?
- Medicare's official clinician data lists Hillary C. Grainer at 1 hospital: Maimonides Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Hillary C. Grainer see patients?
- Medicare's clinician data lists 1 practice location in Brooklyn, NY. Call before your visit to confirm the address.
- What is Hillary C. Grainer's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Hillary C. Grainer accept Medicare assignment?
- Yes. Medicare's clinician data says Hillary C. Grainer 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 Hillary C. Grainer offer telehealth?
- Medicare's clinician data says Hillary C. Grainer offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Hillary C. Grainer?
- (718) 283-7908, as listed in official Medicare / NPI Registry data.
- What is Hillary C. Grainer's NPI number?
- 1770071169. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Hillary C. Grainer works
Medicare's Facility Affiliation Data lists Hillary C. Grainer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Maimonides Medical CenterBrooklyn, NY · Acute Care Hospital · CCN 330194
Practice locations
Addresses where Hillary C. Grainer is enrolled with Medicare (CMS data updated 2026-10-02).
- 4802 10th AveBrooklyn, NY 11219 (718) 283‑7908
Group practices
Medicare enrollment lists Hillary C. Grainer as a member of this group (CMS data updated 2026-10-02).
- Maimonides Medical Center - Maimonides Division of Renal Medic5 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Brooklyn
Clinicians with the same Medicare primary specialty in Brooklyn, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1770071169 |
| 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