DR. JENNIFER LEIGH ROSENBLUM MD
NPI 1316998107
Internal Medicine - Adolescent Medicine in Waltham, MA
About Dr. Jennifer Leigh Rosenblum Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JENNIFER LEIGH ROSENBLUM MD (NPI 1316998107) is an individual adolescent medicine provider in Waltham, Massachusetts, licensed in Massachusetts (209839) and active in the NPI registry since May 2006. She is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Johns Hopkins University School Of Medicine (1998).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 5
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. Jennifer Leigh Rosenblum 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
2Medicare enrollment records show Jennifer Rosenblum reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MAFrequently 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 Jennifer Rosenblum's NPI number?
The NPI number for Jennifer Rosenblum is 1316998107. It was assigned to this individual provider in the NPPES registry on May 15, 2006.
Where is Jennifer Rosenblum located?
Jennifer Rosenblum practices at 40 2nd Ave Ste 300 Mgh West, Waltham, MA 02451. The listed phone number is (617) 643-1201.
What is Jennifer Rosenblum's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Adolescent Medicine, with taxonomy code 207RA0000X.
Is Jennifer Rosenblum enrolled in Medicare?
Yes. Jennifer Rosenblum 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 Jennifer Rosenblum's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jennifer Rosenblum reassigns Medicare benefits to 2 organizations: Massachusetts General Physicians Organization Inc (Boston, MA) and The General Hospital Corporation (Boston, 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 Jennifer Rosenblum's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Jennifer Rosenblum affiliated with any hospitals?
According to CMS data, Jennifer Rosenblum is affiliated with Massachusetts General Hospital.
When was this NPI record last updated?
The NPPES record for Jennifer Rosenblum was last updated on October 30, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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. Jennifer Leigh Rosenblum, MD · NPI 1316998107
Adolescent Medicine physician in Waltham, Massachusetts. Individual provider, active in the CMS NPPES registry since May 15, 2006.
## Identity
- **NPI:** 1316998107 (Entity type: Individual)
- **Enumerated:** May 15, 2006
- **Primary specialty:** Internal Medicine - Adolescent Medicine · taxonomy 207RA0000X
- **State license:** 209839 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 40 2ND AVE STE 300, MGH WEST, Waltham, MA 02451-1136
- **Phone:** (617) 643-1201 · **Fax:** (617) 243-6798
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Johns Hopkins University School Of Medicine, class of 1998
## Record status
- **NPPES last updated:** October 30, 2012
- **Other identifiers:** Medicare ID-Type Unspecified A34558 (MA); Other 209839 (MA); Other J25140 (MA); and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1316998107) · Data from the CMS NPPES public registry.