MARK DOUGLAS BAKER MD
NPI 1568445872
Emergency Medicine - Pediatric Emergency Medicine in New Brunswick, NJ
About Mark Douglas Baker Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK DOUGLAS BAKER MD (NPI 1568445872) is an individual pediatric emergency medicine provider in New Brunswick, New Jersey, licensed in New Jersey (25MA10666500) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
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 (PECOS)
Mark Douglas Baker Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Mark Baker reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New Brunswick, NJ 08901
- Reassigned Medicare billing, New Jersey enrollment
- 492 clinicians in this Medicare group
New Brunswick, NJ 08901
- Reassigned Medicare billing, New Jersey enrollment
- Medicare enrollment name: Rutgers Health-Rwj Pediatric Emergency Faculty
- 20 clinicians in this Medicare group
New Brunswick, NJ 08901
- Reassigned Medicare billing, New Jersey enrollment
- 125 clinicians in this Medicare group
Somerset, NJ 08873
- Reassigned Medicare billing, New Jersey enrollment
- 1,557 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 08901 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
NEW BRUNSWICK, NJ 08901
NEW BRUNSWICK, NJ 08901
NEW BRUNSWICK, NJ 08901
NEW BRUNSWICK, NJ 08901
NEW BRUNSWICK, NJ 08901
NEW BRUNSWICK, NJ 08901
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 Baker's NPI number?
The NPI number for Mark Baker is 1568445872. It was assigned to this individual provider in the NPPES registry on November 22, 2005.
Where is Mark Baker located?
Mark Baker practices at 125 Paterson St, New Brunswick, NJ 08901. The listed phone number is (732) 235-7991.
What is Mark Baker's specialty?
The primary specialty registered for this NPI is Emergency Medicine, specializing in Pediatric Emergency Medicine, with taxonomy code 207PP0204X.
Is Mark Baker enrolled in Medicare?
Yes. Mark Baker is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mark Baker's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Baker reassigns Medicare benefits to 4 organizations: Rutgers Health-Rwj Pediatric Critical Care (New Brunswick, NJ), Rutgers Health-Rwj Pediatric Critical Care (New Brunswick, NJ), Rutgers Health-Rwj Primary Medicine Group (New Brunswick, NJ) and Rwjbh Emergency Medicine Associates, LLC (Somerset, NJ). 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 Baker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Baker accept?
Health plans from Oscar Health list Mark Baker 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 Baker was last updated on January 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months 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.
# Mark Douglas Baker, MD · NPI 1568445872
Pediatric Emergency Medicine physician in New Brunswick, New Jersey. Individual provider, active in the CMS NPPES registry since November 22, 2005.
## Identity
- **NPI:** 1568445872 (Entity type: Individual)
- **Enumerated:** November 22, 2005
- **Primary specialty:** Emergency Medicine - Pediatric Emergency Medicine · taxonomy 207PP0204X
- **State license:** 25MA10666500 (New Jersey)
- **Sole proprietor:** No
## Practice location
- **Address:** 125 PATERSON ST, New Brunswick, NJ 08901-1962
- **Phone:** (732) 235-7991
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Rutgers Health-Rwj Pediatric Critical Care (NPI 1063420776, New Brunswick, NJ); Rutgers Health-Rwj Pediatric Critical Care (NPI 1346322732, New Brunswick, NJ); Rutgers Health-Rwj Primary Medicine Group (NPI 1659475283, New Brunswick, NJ); Rwjbh Emergency Medicine Associates, LLC (NPI 1912510041, Somerset, NJ) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 26, 2026
- **Other identifiers:** Medicaid PENDING (FL); Medicaid 25MA10666500 (NJ); Medicaid 352281401 (MD)
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Source: [NPI Profile](https://npiprofile.com/npi/1568445872) · Data from the CMS NPPES public registry.