J RANDOLPH BAK MD
NPI 1346312089
Pediatrics in Newton, MA
About J Randolph Bak Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
J RANDOLPH BAK MD (NPI 1346312089) is an individual pediatrics provider in Newton, Massachusetts, licensed in Massachusetts (230693) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of Temple University School Of Medicine (1988).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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)
J Randolph Bak Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show J Bak reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Newton, MA 02462
- Reassigned Medicare billing, Massachusetts enrollment
- 992 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 02462 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.
NEWTON, MA 02462
NEWTON LOWER FALLS, MA 02462
NEWTON, MA 02462
NEWTON, MA 02462
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 J Bak's NPI number?
The NPI number for J Bak is 1346312089. It was assigned to this individual provider in the NPPES registry on November 15, 2006. The provider is also known as Jongchul Randolph Bak M.D..
Where is J Bak located?
J Bak practices at 2000 Washington St, Newton, MA 02462. The listed phone number is (617) 243-6325.
What is J Bak's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is J Bak enrolled in Medicare?
Yes. J Bak is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for J Bak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), J Bak reassigns Medicare benefits to Mass General Brigham Medical Group Suburban Massachusetts Inc (Newton, MA). The 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 J Bak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does J Bak accept?
Health plans from Taro Health list J Bak 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 J Bak was last updated on December 1, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# J Randolph Bak, MD · NPI 1346312089
Pediatrics physician in Newton, Massachusetts. Individual provider, active in the CMS NPPES registry since November 15, 2006.
## Identity
- **NPI:** 1346312089 (Entity type: Individual)
- **Enumerated:** November 15, 2006
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 230693 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 2000 WASHINGTON ST, Newton, MA 02462-1650
- **Phone:** (617) 243-6325
## 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:** Mass General Brigham Medical Group Suburban Massachusetts Inc (NPI 1538191218, Newton, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Temple University School Of Medicine, class of 1988
## Record status
- **NPPES last updated:** December 1, 2010
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Source: [NPI Profile](https://npiprofile.com/npi/1346312089) · Data from the CMS NPPES public registry.