PROVIDER PROFILE · NPI 1689755365

John WallmarkM.D.

PRACTICEASSOCIATES IN ONCOLOGY HEMATOLOGY PCSee all providers at this practice →

Hematology-OncologyRockville, MDI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

4,222

Unique beneficiaries

—

Total services

125,093

Distinct HCPCS

Medicare payment

$1.7M

Peer benchmark

Total Medicare services vs. 175 Hematology-Oncology providers in MD — top quintile (cohort median 11,156).

PRESCRIBING · PART D · 2024

Total Rx claims

837

Beneficiaries

—

Total drug cost

$4.2M

Distinct drugs

Brand share

37.0%

Top prescribed drugs

Letrozole205 claims

Rivaroxaban56 claims

Anastrozole55 claims

Warfarin Sodium49 claims

Acyclovir38 claims

QUALITY · MIPS · 2024

Final MIPS score

97.5

Quality

92.1

Cost

0.0

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.95%

Individual

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$3K

Payment records

By payment type

Food and Beverage$2K

Long term medical supply or device loan$1,000

Education$100

REFERRAL NETWORK

Where John Wallmark'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). 23 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Joseph Haggerty Hematology-Oncology · Rockville, MD	95	1,014
George Sotos Hematology-Oncology · Rockville, MD	91	628
AGRAWAL, MANISH	89	641
Quest Diagnostics Incorporated Md Clinical Laboratory · Baltimore, MD	73	238
SUBURBAN HOSPITAL, INC.	64	399
Carolyn Hendricks Hematology-Oncology · Bethesda, MD	32	218
William Craig Diagnostic Radiology · Orlando, FL	26	85
Renu Berry Diagnostic Radiology · Germantown, MD	23	74
Huijung Kim Diagnostic Radiology · Washington, DC	19	38
Stephen Fine Diagnostic Radiology · Washington, DC	17	38
Zahide Erkmen Diagnostic Radiology · Germantown, MD	16	53
CASANOVA, VELMA	15	44

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