Quick answers
- Where does Mark D. Guzman see patients?
- Medicare's clinician data lists 2 practice locations, including Medford, NY and Port Jefferson, NY. Call before your visit to confirm the address.
- What is Mark D. Guzman's specialty?
- Medicare lists Occupational Therapist in Private Practice as the primary specialty.
- Does Mark D. Guzman accept Medicare assignment?
- Medicare's clinician data says Mark D. Guzman may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Mark D. Guzman?
- (631) 266-4501, as listed in official Medicare / NPI Registry data.
- What is Mark D. Guzman's NPI number?
- 1003265620. 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. Guzman is enrolled with Medicare (CMS data updated 2026-10-02).
- 1529 N Ocean AveMedford, NY 11763 (631) 266‑4501
- 7 Waterview DrPort Jefferson, NY 11777 (631) 513‑9475
Group practices
Medicare enrollment lists Mark D. Guzman as a member of these groups (CMS data updated 2026-10-02).
- Evolution Home Physical Therapy, P.C.6 clinicians in the group
- Provident Physical and Occupational Therapy PLLC2 clinicians in the group
Specialties
Find other clinicians: Occupational Therapist in Private Practice, New York →
Other occupational therapists in Medford
Clinicians with the same Medicare primary specialty in Medford, NY — not a recommendation.
Clinician information
| Credential | OT |
|---|---|
| Graduation year | 1998 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1003265620 |
| 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