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PROVIDER PROFILE · NPI 1174592653

Gunnlaugur NielsenMD

PathologyBoston, MAI
CROSS-REFERENCE

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ProviderScore
OIG/SAM exclusion screening, sanctions history
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QUALITY · MIPS · 2024
No data available for this provider in 2024.
FACILITY AFFILIATIONS

Hospital & Facility Affiliations (3)

CCN 220071
Hospital
CCN 220075
Hospital
CCN 221300
Hospital
PRESCRIBING · PART D · 2024
No data available for this provider in 2024.
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
No data available for this provider in 2024.
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
1,626
Unique beneficiaries
—
Total services
2,199
Distinct HCPCS
13
Medicare payment
$63K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 548 Pathology providers in MA — above median (cohort median 1,471).
REFERRAL NETWORK

Where Gunnlaugur Nielsen'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). 38 inbound referrers · 77 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
THE GENERAL HOSPITAL CORPORATION5151,269
KATTAPURAM, SUSAN4065
Andrew Freiberg
Orthopedic Surgery · Boston, MA
37104
Martin Torriani
Diagnostic Radiology · Boston, MA
3669
Ambrose Huang
Diagnostic Radiology · Saint Louis, MO
2751
Richard Sacknoff
Diagnostic Radiology · Boston, MA
2536
WATKINS, MICHAEL2589
Francis Hornicek
Orthopedic Surgery · Miami, FL
2465
Christopher Newton-Cheh
Advanced Heart Failure and Transplant Cardiology · Boston, MA
2332
SWAN, JOHN2334
Valentin Antoci
Orthopedic Surgery · East Providence, RI
2222
Oleg Evgenov
Anesthesiology · Boston, MA
2021
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
THE GENERAL HOSPITAL CORPORATION226483
FALLON SERVICE, INC.110137
MASS GENERAL BRIGHAM HOME CARE, INC.7880
Dennis Burke
Orthopedic Surgery · Boston, MA
67172
Ambrose Huang
Diagnostic Radiology · Saint Louis, MO
5073
Connie Chang
Diagnostic Radiology · Boston, MA
4857
Frank Simeone
Diagnostic Radiology · Boston, MA
4560
SWAN, JOHN3645
William Palmer
Diagnostic Radiology · Boston, MA
3444
VASSALLO, SUSAN3334
Arvin Kheterpal
Diagnostic Radiology · Boston, MA
3139
Milena Petranovic
Diagnostic Radiology · Boston, MA
3146
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.