DR. MARK P DEMATTEO MD
NPI 1922044015
Emergency Medicine in Braintree, MA
About Dr. Mark P Dematteo Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK P DEMATTEO MD (NPI 1922044015) is an individual emergency medicine provider in Braintree, Massachusetts, licensed in Massachusetts (150129) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Beth Israel Deaconess Hospital Plymouth, and is a graduate of University Of Vermont College Of Medicine (1993).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
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 P Dematteo Md 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
4Medicare enrollment records show Mark Dematteo reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Braintree, MA 02184
- Reassigned Medicare billing, Massachusetts enrollment
- 1,317 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- Also billed through NPI 1952358533 (Massachusetts)
- 1,006 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 2,579 clinicians in this Medicare group
Sandwich, MA 02563
- Reassigned Medicare billing, Massachusetts enrollment
- 129 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.
Areas of Expertise CMS Part B claims 23
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Beth Israel Deaconess Hospital Plymouth
Acute Care Hospitals · Plymouth, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02184 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
BRAINTREE, MA 02184
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 Dematteo's NPI number?
The NPI number for Mark Dematteo is 1922044015. It was assigned to this individual provider in the NPPES registry on June 20, 2006.
Where is Mark Dematteo located?
Mark Dematteo practices at 111 Grossman Dr, Braintree, MA 02184. The listed phone number is (781) 849-1000.
What is Mark Dematteo's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Mark Dematteo enrolled in Medicare?
Yes. Mark Dematteo 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 Dematteo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Dematteo reassigns Medicare benefits to 4 organizations: Atrius Health, Inc. (Braintree, MA), Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (Boston, MA), Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA) and Urgi Center Medical Group (Sandwich, MA). 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 Dematteo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Dematteo accept?
Health plans from Taro Health list Mark Dematteo 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.
Is Mark Dematteo affiliated with any hospitals?
According to CMS data, Mark Dematteo is affiliated with Beth Israel Deaconess Hospital Plymouth.
When was this NPI record last updated?
The NPPES record for Mark Dematteo was last updated on January 7, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.