Quick answers
- Where does Mark P. Sullivan see patients?
- Medicare's clinician data lists 1 practice location in New York, NY. Call before your visit to confirm the address.
- What is Mark P. Sullivan's specialty?
- Medicare lists Psychiatry as the primary specialty.
- Does Mark P. Sullivan accept Medicare assignment?
- Yes. Medicare's clinician data says Mark P. Sullivan 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 P. Sullivan?
- (914) 682-9100, as listed in official Medicare / NPI Registry data.
- What is Mark P. Sullivan's NPI number?
- 1386098762. 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 P. Sullivan is enrolled with Medicare (CMS data updated 2026-10-02).
- 525 E 68th StNew York, NY 10065 (914) 682‑9100
Group practices
Medicare enrollment lists Mark P. Sullivan as a member of this group (CMS data updated 2026-10-02).
- Weill Medical College of Cornell2,051 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Columbia University College Of Physicians And Surgeons |
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1386098762 |
| 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