Mark Dexter, M.D.
NPI 1033408513 · Pediatric Critical Care Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Critical Care (intensivists) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Dexter, M.D. is a Pediatric Critical Care Medicine Physician provider in Boston, MA (NPI 1033408513).
Provider details
- NPI number
- 1033408513
- Entity type
- Individual
- Primary specialty
- Pediatric Critical Care Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 281842 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (2)
- 282 Washington StHartford, CT 06106-3322Phone: (860) 545-9850Fax: (860) 545-8812
- 800 Washington StBoston, MA 02111-1552Phone: (617) 636-8100Fax: (617) 636-8391
Registry dates
- Enumerated
- 2011-04-05
- Last updated
- 2023-04-05
- Certified
- 2023-04-05
Frequently asked questions
- What is Mark Dexter's NPI number?
- Mark Dexter's National Provider Identifier (NPI) is 1033408513, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Dexter's specialty?
- Mark Dexter is listed in the NPPES registry with a primary specialty of Pediatric Critical Care Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Dexter located?
- Mark Dexter's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5737.
- What is Mark Dexter's phone number?
- The practice phone number listed in the NPPES registry for Mark Dexter is (617) 355-6000.
- Does Mark Dexter accept Medicare?
- Mark Dexter is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Dexter's NPI active?
- Yes — Mark Dexter's NPI (1033408513) is active in the NPPES registry as of the last update on 2023-04-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.