ELYSSA A. PELLISH MD
NPI 1407830201
Emergency Medicine in Worcester, MA
About Elyssa A. Pellish Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ELYSSA A. PELLISH MD (NPI 1407830201) is an individual emergency medicine provider in Worcester, Massachusetts, licensed in Massachusetts (234790) and active in the NPI registry since December 2005. She is enrolled in Medicare PECOS, is affiliated with Mount Auburn Hospital, and is a graduate of University Of Massachusetts Medical School (2001).
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 and accepts Medicare assignment
Elyssa A. Pellish 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
3Medicare enrollment records show Elyssa Pellish reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Worcester, MA 01606
- Reassigned Medicare billing, Massachusetts enrollment
- 718 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 1,006 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 2,579 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 11
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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mount Auburn Hospital
Acute Care Hospitals · Cambridge, MABeth Israel Deaconess Medical Center
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01655 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.
WORCESTER, MA 01655
WORCESTER, MA 01655
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 Elyssa Pellish's NPI number?
The NPI number for Elyssa Pellish is 1407830201. It was assigned to this individual provider in the NPPES registry on December 5, 2005.
Where is Elyssa Pellish located?
Elyssa Pellish practices at 55 Lake Ave N Department Of Emergency Medicine, Worcester, MA 01655. The listed phone number is (508) 421-1400.
What is Elyssa Pellish's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Elyssa Pellish enrolled in Medicare?
Yes. Elyssa Pellish 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 Elyssa Pellish's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Elyssa Pellish reassigns Medicare benefits to 3 organizations: Reliant Medical Group, Inc (Worcester, MA), Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (Boston, MA) and Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr 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 Elyssa Pellish's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Elyssa Pellish accept?
Health plans from Taro Health list Elyssa Pellish 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.
Is Elyssa Pellish affiliated with any hospitals?
According to CMS data, Elyssa Pellish is affiliated with Mount Auburn Hospital and Beth Israel Deaconess Medical Center.
When was this NPI record last updated?
The NPPES record for Elyssa Pellish was last updated on March 25, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.
# Elyssa A. Pellish, MD · NPI 1407830201
Emergency Medicine physician in Worcester, Massachusetts. Individual provider, active in the CMS NPPES registry since December 5, 2005.
## Identity
- **NPI:** 1407830201 (Entity type: Individual)
- **Enumerated:** December 5, 2005
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 234790 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 LAKE AVE N, DEPARTMENT OF EMERGENCY MEDICINE, Worcester, MA 01655-0002
- **Phone:** (508) 421-1400 · **Fax:** (508) 421-1490
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Reliant Medical Group, Inc (NPI 1720017528, Worcester, MA); Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (NPI 1861216038, Boston, MA); Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (NPI 1194765438, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Massachusetts Medical School, class of 2001
## Record status
- **NPPES last updated:** March 25, 2009
- **Other identifiers:** Medicare PIN 000679401 (MA); Medicaid 2152452 (MA); Medicare UPIN I39460 (MA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1407830201) · Data from the CMS NPPES public registry.