DR. MICHELLE RENGARAJAN M.D., PH.D.
NPI 1194175950
Internal Medicine - Endocrinology, Diabetes & Metabolism in Boston, MA
About Dr. Michelle Rengarajan M.d., Ph.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHELLE RENGARAJAN M.D., PH.D. (NPI 1194175950) is an individual endocrinology, diabetes & metabolism provider in Boston, Massachusetts, licensed in Massachusetts (290506) and active in the NPI registry since June 2016. She is enrolled in Medicare PECOS and maintains a secondary practice location in Boston.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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)
Dr. Michelle Rengarajan M.d., Ph.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Michelle Rengarajan 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
- 6,234 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 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
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 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.
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
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 Michelle Rengarajan's NPI number?
The NPI number for Michelle Rengarajan is 1194175950. It was assigned to this individual provider in the NPPES registry on June 13, 2016.
Where is Michelle Rengarajan located?
Michelle Rengarajan practices at 55 Fruit St, Boston, MA 02114. The listed phone number is (617) 726-3872.
What is Michelle Rengarajan's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.
Is Michelle Rengarajan enrolled in Medicare?
Yes. Michelle Rengarajan is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Michelle Rengarajan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michelle Rengarajan reassigns Medicare benefits to 2 organizations: The General Hospital Corporation (Boston, MA) and Massachusetts General Physicians Organization Inc (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 Michelle Rengarajan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michelle Rengarajan accept?
Health plans from Taro Health list Michelle Rengarajan 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 Michelle Rengarajan was last updated on January 13, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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. Michelle Rengarajan, M.D., PH.D. · NPI 1194175950
Endocrinology, Diabetes & Metabolism physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since June 13, 2016.
## Identity
- **NPI:** 1194175950 (Entity type: Individual)
- **Enumerated:** June 13, 2016
- **Primary specialty:** Internal Medicine - Endocrinology, Diabetes & Metabolism · taxonomy 207RE0101X
- **State license:** 290506 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FRUIT ST, Boston, MA 02114-2696
- **Phone:** (617) 726-3872
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): The General Hospital Corporation (NPI 1023049236, Boston, MA); Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 13, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1194175950) · Data from the CMS NPPES public registry.