DR. ALYSSA SHERWILL MD
NPI 1821618554
Radiology - Diagnostic Radiology in Boston, MA
About Dr. Alyssa Sherwill Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALYSSA SHERWILL MD (NPI 1821618554) is an individual diagnostic radiology provider in Boston, Massachusetts, licensed in Massachusetts (1023588) and active in the NPI registry since April 2020. She is enrolled in Medicare PECOS, is affiliated with Lowell General Hospital, 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 and accepts Medicare assignment
Dr. Alyssa Sherwill 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
6Medicare enrollment records show Alyssa Sherwill reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 4,574 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
- 1,477 clinicians in this Medicare group
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 2,579 clinicians in this Medicare group
Melrose, MA 02176
- Reassigned Medicare billing, Massachusetts enrollment
- 75 clinicians in this Medicare group
Lowell, MA 01854
- Reassigned Medicare billing, Massachusetts enrollment
- 93 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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Lowell General Hospital
Acute Care Hospitals · Lowell, MAMelrosewakefield Healthcare
Acute Care Hospitals · Melrose, MAMassachusetts General Hospital
Acute Care Hospitals · Boston, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAFaulkner Hospital-Brigham And Women's
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02115 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 02115
BOSTON, MA 02115
BOSTON, MA 02115
BOSTON, MA 02115
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 Alyssa Sherwill's NPI number?
The NPI number for Alyssa Sherwill is 1821618554. It was assigned to this individual provider in the NPPES registry on April 22, 2020.
Where is Alyssa Sherwill located?
Alyssa Sherwill practices at 75 Francis St, Boston, MA 02115. The listed phone number is (617) 732-5500.
What is Alyssa Sherwill's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Alyssa Sherwill enrolled in Medicare?
Yes. Alyssa Sherwill 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 Alyssa Sherwill's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alyssa Sherwill reassigns Medicare benefits to 6 organizations: Brigham & Womens Physicians Organization Inc (Boston, MA), Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (Boston, MA), Beth Israel Deaconess Medical Center, Inc. (Boston, MA), Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (Boston, MA), Mw Radiology-Cra LLC (Melrose, MA) and 1 more organization, listed in the Medicare section above. 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 Alyssa Sherwill's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alyssa Sherwill accept?
Health plans from Taro Health list Alyssa Sherwill 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 Alyssa Sherwill affiliated with any hospitals?
According to CMS data, Alyssa Sherwill is affiliated with Lowell General Hospital, Melrosewakefield Healthcare, Massachusetts General Hospital, Brigham And Women's Hospital and Faulkner Hospital-Brigham And Women's.
When was this NPI record last updated?
The NPPES record for Alyssa Sherwill was last updated on April 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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. Alyssa Sherwill, MD · NPI 1821618554
Diagnostic Radiology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since April 22, 2020.
## Identity
- **NPI:** 1821618554 (Entity type: Individual)
- **Enumerated:** April 22, 2020
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** 1023588 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 75 FRANCIS ST, Boston, MA 02115-6110
- **Phone:** (617) 732-5500
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Brigham & Womens Physicians Organization Inc (NPI 1033535497, Boston, MA); Associated Physicians Of Harvard Medical Faculty Physicians At Beth Is (NPI 1861216038, Boston, MA); Beth Israel Deaconess Medical Center, Inc. (NPI 1548202641, Boston, MA); Harvard Medical Faculty Phys At Beth Israel Deaconess Med Ctr Inc (NPI 1194765438, Boston, MA); Mw Radiology-Cra LLC (NPI 1114555398, Melrose, MA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York Medical College, class of 2020
## Record status
- **NPPES last updated:** April 15, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1821618554) · Data from the CMS NPPES public registry.