NPI registry status
Active
2026 NPPES data Diagnostic Radiology Physician NPI 1821618554 MD
Verify on CMS → Alyssa Sherwill, MD
Diagnostic Radiology Physician in Boston, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 40,433 in Diagnostic Radiology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
What the federal data shows
Alyssa Sherwill, MD is a Diagnostic Radiology Physician in Boston, Massachusetts, listed in the federal CMS National Provider Identifier registry.
- Likely
- board-certified (heuristic)
- #33
- Diagnostic Radiology Physician rank among Massachusetts specialties
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Alyssa Sherwill, MD
Federal registry listing with board-eligibility signals — verify credentials with the state medical board before clinical decisions.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1821618554), first enumerated 04/22/2020.
Source: CMS NPPES
- Not in federal data
Medicare Part D participation
No 2023 Medicare Part D prescribing volume appears in the CMS public file for this NPI (may reflect specialty, new enrollment, or non-prescribing role).
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Alyssa Sherwill, MD's individual license status. Verify directly with the state medical board.
Source: BORIM annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1821618554 · Diagnostic Radiology Physician
NPI-10 · ENUM-RECENT · TAX-MID · RX-NONE · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1821618554
- ENUM-RECENT 2020
- TAX-MID 40K Diagnostic Radiology
- RX-NONE No Part D
- BOOK-LIGHT 1,484 in Massachusetts
- PHOTO-ENUM Henry Stiepel · 2020
✓
Board certification likely (heuristic, not verified)
Alyssa Sherwill, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Alyssa Sherwill, MD?
Quality data not reportedPrimary specialty
Diagnostic Radiology Physician
Specialty distribution in Massachusetts
How Diagnostic Radiology Physician compares to other specialties among Massachusetts providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Diagnostic Radiology Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1821618554 |
|---|---|
| Specialty | Diagnostic Radiology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 04/22/2020 |
Hospital and facility affiliations
Facilities where Alyssa Sherwill, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Brigham And Womens Physicians Organization Inc
Boston, MA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Massachusetts BORIM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Alyssa Sherwill, MD. To verify Alyssa Sherwill, MD's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Diagnostic Radiology Physician Overview
How Alyssa Sherwill, MD fits within the Diagnostic Radiology Physician landscape nationally.
40,433
Diagnostic Radiology Physician Providers in US
56
States with Diagnostic Radiology Physician
68
Avg Claims per Provider
Nationwide Diagnostic Radiology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Sherwill, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2020)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Diagnostic Radiology Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Sherwill.
One of 1,484 Diagnostic Radiology Physician providers enrolled in Massachusetts, 5 are shown here.
Aly Abayazeed
Worcester, MA
Dr. Mashya Abbassi
MD
Boston, MA
Dr. Gerald Abbott
MD
Boston, MA
Dr. Shadi Abdar Esfahani
MD, MPH
Boston, MA
Dr. Essmaeel Abdel-Dayem
MD
South Weymouth, MA
Compare Diagnostic Radiology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Alyssa Sherwill, MD's specialty? ▼
Alyssa Sherwill, MD specializes in Diagnostic Radiology Physician and practices in Boston, Massachusetts. Credentials: MD.
Where is Alyssa Sherwill, MD located? ▼
Alyssa Sherwill, MD is located at 75 FRANCIS ST, Boston, MA, 02115. Phone: (617) 732-5500.
What is Alyssa Sherwill, MD's NPI number? ▼
Alyssa Sherwill, MD's National Provider Identifier (NPI) is 1821618554, issued on 04/22/2020.
How many Diagnostic Radiology Physician providers are there in the US? ▼
There are 40,433 Diagnostic Radiology Physician providers across 56 states in the US. The average Diagnostic Radiology Physician provider writes 68 Medicare Part D claims per year.
Does Alyssa Sherwill, MD accept Medicare? ▼
Alyssa Sherwill, MD appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alyssa Sherwill, MD's credentials? ▼
Alyssa Sherwill, MD's NPI is 1821618554 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.