DR. MARK DAVID DEXTER M.D.
NPI 1033408513
Pediatrics - Pediatric Critical Care Medicine in Boston, MA
About Dr. Mark David Dexter M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK DAVID DEXTER M.D. (NPI 1033408513) is an individual pediatric critical care medicine provider in Boston, Massachusetts, licensed in Massachusetts (281842) and active in the NPI registry since April 2011. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Eastern Virginia Medical School (2011).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Mark David Dexter M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Mark Dexter reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 1,358 clinicians in this Medicare group
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 220 clinicians in this Medicare group
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 86 clinicians in this Medicare group
Boston, MA 02111
- Reassigned Medicare billing, Massachusetts enrollment
- 202 clinicians in this Medicare group
Hartford, CT 06106
- Reassigned Medicare billing, Connecticut enrollment
- 601 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02115
BOSTON, MA 02115
BOSTON, MA 02115
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Mark Dexter's NPI number?
The NPI number for Mark Dexter is 1033408513. It was assigned to this individual provider in the NPPES registry on April 5, 2011.
Where is Mark Dexter located?
Mark Dexter practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 355-6000.
What is Mark Dexter's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Critical Care Medicine, with taxonomy code 2080P0203X.
Is Mark Dexter enrolled in Medicare?
Yes. Mark Dexter is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Mark Dexter's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Dexter reassigns Medicare benefits to 5 organizations: Children's Hospital Pediatric Associates, Inc (Boston, MA), Boston Childrens Heart Foundation Inc (Boston, MA), Chmc Anesthesia Foundation Inc (Boston, MA), Pratt Pediatric Associates Inc (Boston, MA) and Connecticut Children's Specialty Group, Inc. (Hartford, CT). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark Dexter's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Dexter accept?
Health plans from Anthem Blue Cross and Blue Shield list Mark Dexter as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Mark Dexter was last updated on April 5, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Mark David Dexter, M.D. · NPI 1033408513
Pediatric Critical Care Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since April 5, 2011.
## Identity
- **NPI:** 1033408513 (Entity type: Individual)
- **Enumerated:** April 5, 2011
- **Primary specialty:** Pediatrics - Pediatric Critical Care Medicine · taxonomy 2080P0203X
- **State license:** 281842 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 LONGWOOD AVE, Boston, MA 02115-5737
- **Phone:** (617) 355-6000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Children's Hospital Pediatric Associates, Inc (NPI 1457306664, Boston, MA); Boston Childrens Heart Foundation Inc (NPI 1982680922, Boston, MA); Chmc Anesthesia Foundation Inc (NPI 1831268754, Boston, MA); Pratt Pediatric Associates Inc (NPI 1477590511, Boston, MA); Connecticut Children's Specialty Group, Inc. (NPI 1669448882, Hartford, CT) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Eastern Virginia Medical School, class of 2011
## Record status
- **NPPES last updated:** April 5, 2023
- **Other identifiers:** Medicaid 110158942A (MA); Other 281842 (MA); Other S400622433 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1033408513) · Data from the CMS NPPES public registry.