DR. ZELDA JENNIFAY GHERSIN M.D.
NPI 1891100517
Pediatrics - Pediatric Critical Care Medicine in Boston, MA
About Dr. Zelda Jennifay Ghersin M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ZELDA JENNIFAY GHERSIN M.D. (NPI 1891100517) is an individual pediatric critical care medicine provider in Boston, Massachusetts, licensed in Massachusetts (270662) and active in the NPI registry since June 2014. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
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. Zelda Jennifay Ghersin M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Zelda Ghersin reassigns Medicare billing to 4 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
Newton, MA 02462
- Reassigned Medicare billing, Massachusetts enrollment
- 992 clinicians in this Medicare group
Red Bank, NJ 07701
- Reassigned Medicare billing, New Jersey enrollment
- 306 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.
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 Zelda Ghersin's NPI number?
The NPI number for Zelda Ghersin is 1891100517. It was assigned to this individual provider in the NPPES registry on June 23, 2014.
Where is Zelda Ghersin located?
Zelda Ghersin practices at 55 Fruit St, Boston, MA 02114. The listed phone number is (973) 754-2543.
What is Zelda Ghersin's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Critical Care Medicine, with taxonomy code 2080P0203X.
Is Zelda Ghersin enrolled in Medicare?
Yes. Zelda Ghersin is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Zelda Ghersin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Zelda Ghersin reassigns Medicare benefits to 4 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA), Mass General Brigham Medical Group Suburban Massachusetts Inc (Newton, MA) and Hackensack Meridian Health Medical Group - Complex Care PC (Red Bank, 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 Zelda Ghersin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Zelda Ghersin accept?
Health plans from Oscar Health and Taro Health list Zelda Ghersin 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 Zelda Ghersin was last updated on January 4, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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. Zelda Jennifay Ghersin, M.D. · NPI 1891100517
Pediatric Critical Care Medicine physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since June 23, 2014.
## Identity
- **NPI:** 1891100517 (Entity type: Individual)
- **Enumerated:** June 23, 2014
- **Primary specialty:** Pediatrics - Pediatric Critical Care Medicine · taxonomy 2080P0203X
- **State license:** 270662 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 55 FRUIT ST, Boston, MA 02114-2621
- **Phone:** (973) 754-2543
## 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): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Mass General Brigham Medical Group Suburban Massachusetts Inc (NPI 1538191218, Newton, MA); Hackensack Meridian Health Medical Group - Complex Care PC (NPI 1154379626, Red Bank, NJ) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 4, 2018
- **Other identifiers:** Medicaid 1891100517 (MA); Other 945046064 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1891100517) · Data from the CMS NPPES public registry.