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PROVIDER PROFILE · NPI 1053381251

Mark ChisamM.D.

PRACTICERIVERSIDE PHYSICIAN SERVICES INCSee all providers at this practice →
Radiation OncologyWilliamsburg, VAI
CROSS-REFERENCE

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FACILITY AFFILIATIONS

Hospital & Facility Affiliations (1)

CCN 490052
Hospital
QUALITY · MIPS · 2024
Final MIPS score
94.9
Quality
92.9
Cost
0.0
Improvement activities
40.0
Promoting interop.
94.9
Payment adjustment
0.84%
APM Entity
PRESCRIBING · PART D · 2024
No data available for this provider in 2024.
INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024
Total received
$37
Payment records
2
By payment type
Food and Beverage$37
MEDICARE UTILIZATION · PART B · 2024
Total beneficiaries
433
Unique beneficiaries
—
Total services
1,346
Distinct HCPCS
13
Medicare payment
$89K
Peer benchmark
Q1
Q2
Q3
Q4
Q5
Total Medicare services vs. 97 Radiation Oncology providers in VA — below median (cohort median 2,481).
REFERRAL NETWORK

Where Mark Chisam'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). 19 inbound referrers · 28 outbound destinations.

Receives referrals from
Inbound — who sends patients here
PhysicianPatientsVisits
RIVERSIDE HOSPITAL INC1632,654
LAYSER, JOSEPH721,848
SENTARA HOSPITALS35183
BOOTH, BRUCE341,018
DOCTORS' HOSPITAL OF WILLIAMSBURG29169
Christina Prillaman
Hematology-Oncology · Williamsburg, VA
22245
Ravi Shamaiengar
Diagnostic Radiology · Columbia, MD
20108
MONTILEONE, MICHAEL1997
Melinda Dunn
Diagnostic Radiology · Williamsburg, VA
1981
James Primich
Diagnostic Radiology · Richmond, VA
1789
Stephen Foxx
Diagnostic Radiology · Richmond, VA
16118
Donna Corvette
Dermatology · Williamsburg, VA
16141
Refers patients to
Outbound — where patients go next
PhysicianPatientsVisits
RIVERSIDE HOSPITAL INC2022,553
SENTARA HOSPITALS981,026
LAYSER, JOSEPH742,445
GILLESPIE, LORI611,392
John Paschold
Hematology-Oncology · Williamsburg, VA
512,409
Laboratory Corporation Of America Holdings
Clinical Laboratory · Burlington, NC
44322
John Miller
Hematology-Oncology · Williamsburg, VA
37971
BOOTH, BRUCE341,072
KERSH, CHARLES31439
Christina Prillaman
Hematology-Oncology · Williamsburg, VA
22251
DOCTORS' HOSPITAL OF WILLIAMSBURG22158
SENTARA HOSPITALS2059
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.