Quick answers
- Where does Mark D. Pfeiffer see patients?
- Medicare's clinician data lists 4 practice locations, including Providence, RI. Call before your visit to confirm the address.
- What is Mark D. Pfeiffer's specialty?
- Medicare lists Clinical Social Worker as the primary specialty.
- Does Mark D. Pfeiffer accept Medicare assignment?
- Yes. Medicare's clinician data says Mark D. Pfeiffer 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. Pfeiffer?
- (401) 444-0580, as listed in official Medicare / NPI Registry data.
- What is Mark D. Pfeiffer's NPI number?
- 1447433016. 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. Pfeiffer is enrolled with Medicare (CMS data updated 2026-10-02).
- 239 Cranston StProvidence, RI 02907 (401) 444‑0580
- 31 Atwood StProvidence, RI 02909 (401) 444‑0590
- 375 Allens AveProvidence, RI 02905 (401) 444‑0400
- 40 Candace StProvidence, RI 02908 (401) 444‑0550
Group practices
Medicare enrollment lists Mark D. Pfeiffer as a member of this group (CMS data updated 2026-10-02).
- The Providence Community Health Centers Inc.92 clinicians in the group
Specialties
- Clinical Social Workerprimary
Find other clinicians: Clinical Social Worker, Rhode Island →
Other clinical social workers in Providence
Clinicians with the same Medicare primary specialty in Providence, RI — not a recommendation.
Clinician information
| Credential | CSW |
|---|---|
| Medical school | Indiana University School Of Medicine |
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447433016 |
| 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