What is Maryellen Sun's specialty?

Maryellen Sun (NPI 1861661092) is a Medicare-billing provider whose primary specialty is Diagnostic Radiology in Boston, MA.

Where does Maryellen Sun practice?

Maryellen Sun practices in Boston, MA, based on the location reported in the CMS Medicare provider datasets for NPI 1861661092.

How much does Medicare pay Maryellen Sun?

Maryellen Sun (NPI 1861661092) received approximately $22K in total Medicare Part B payments, serving 356 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1861661092

Maryellen SunM.D.

Diagnostic RadiologyBoston, MAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

399

Unique beneficiaries

—

Total services

404

Distinct HCPCS

Medicare payment

$19K

Peer benchmark

Total Medicare services vs. 1,146 Diagnostic Radiology providers in MA — bottom quintile (cohort median 2,596).

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Maryellen Sun's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 99 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Paul Spirn Diagnostic Radiology · Boston, MA	157	335
Ronald Eisenberg Diagnostic Radiology · Boston, MA	144	287
Alexander Bankier Diagnostic Radiology · Worcester, MA	143	319
BOISELLE, PHILLIP	75	142
Quest Diagnostics Massachusetts Llc Clinical Laboratory · Marlborough, MA	70	159
BETH ISRAEL DEACONESS HOSPITAL-NEEDHAM, INC.	69	139
Elisa Flower Diagnostic Radiology · Boston, MA	67	91
James Ducksoon Chang Cardiology · Boston, MA	57	74
Janneth Romero Diagnostic Radiology · Brighton, MA	52	87
KANE, ROBERT	51	128
Evan Appelbaum Cardiology · Chestnut Hill, MA	43	60
Sejal Shah Diagnostic Radiology · Dallas, TX	42	56

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events