Quick answers
- Where does Mark Clapp see patients?
- Medicare's clinician data lists 3 practice locations, including Boston, MA and Portsmouth, NH. Call before your visit to confirm the address.
- What is Mark Clapp's specialty?
- Medicare lists Obstetrics/Gynecology as the primary specialty.
- Does Mark Clapp accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Clapp 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 Clapp?
- (617) 724-0287, as listed in official Medicare / NPI Registry data.
- What is Mark Clapp's NPI number?
- 1407122930. 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 Clapp is enrolled with Medicare (CMS data updated 2026-10-02).
- 55 Fruit StBoston, MA 02114 (617) 724‑0287
- 67 Corporate Dr, Bldg APortsmouth, NH 03801 (603) 431‑5529
- 67 Corporate Dr, Suite 300Portsmouth, NH 03801 (603) 516‑0092
Group practices
Medicare enrollment lists Mark Clapp as a member of these groups (CMS data updated 2026-10-02).
- Massachusetts General Physicians Organization Inc3,558 clinicians in the group
- Wentworth Douglass Physician Corporation429 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Boston
Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1407122930 |
| 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