What is Mark Stolar's specialty?

Mark Stolar (NPI 1396784591) is a Medicare-billing provider whose primary specialty is Internal Medicine in Woodstock, IL.

Where does Mark Stolar practice?

Mark Stolar practices in Woodstock, IL, based on the location reported in the CMS Medicare provider datasets for NPI 1396784591.

How much does Medicare pay Mark Stolar?

Mark Stolar (NPI 1396784591) received approximately $129K in total Medicare Part B payments, serving 541 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1396784591

Mark StolarM.D.

Internal MedicineWoodstock, ILI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,215

Unique beneficiaries

—

Total services

1,427

Distinct HCPCS

Medicare payment

$111K

Peer benchmark

Total Medicare services vs. 3,790 Internal Medicine providers in IL — top quintile (cohort median 760).

PRESCRIBING · PART D · 2024

Total Rx claims

9,342

Beneficiaries

—

Total drug cost

$1.3M

Distinct drugs

160

Brand share

27.5%

Top prescribed drugs

Levothyroxine Sodium516 claims

Atorvastatin Calcium444 claims

Rosuvastatin Calcium303 claims

Amlodipine Besylate298 claims

Metoprolol Succinate242 claims

QUALITY · MIPS · 2024

Final MIPS score

95.6

Quality

88.5

Cost

0.0

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.87%

APM Entity

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

REFERRAL NETWORK

Where Mark Stolar'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). 10 inbound referrers · 12 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
NORTHWESTERN MEMORIAL HOSPITAL	203	937
ENDEAVOR HEALTH CLINICAL OPERATIONS	33	104
REHABILITATION INSTITUTE OF CHICAGO	16	45
Thomas Grant Diagnostic Radiology · Chicago, IL	13	30
CENTRAL DUPAGE HOSPITAL ASSOCIATION	13	53
DAVISON, RICHARDO	13	29
WIGGINS, CAROLYN	12	34
Eric Hart Diagnostic Radiology · Chicago, IL	11	29
City Of Chicago Ambulance Service Provider · Chicago, IL	11	38
Ronald Hendrix Diagnostic Radiology · Chicago, IL	11	20

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
NORTHWESTERN MEMORIAL HOSPITAL	368	1,973
ENDEAVOR HEALTH CLINICAL OPERATIONS	32	105
STRIMLING, ARNOLD	22	70
MILLER, JOHN	16	50
RUSH UNIVERSITY MEDICAL CENTER	15	55
REHABILITATION INSTITUTE OF CHICAGO	14	39
Thomas Grant Diagnostic Radiology · Chicago, IL	13	24
Kevin Blount Diagnostic Radiology · Marietta, GA	13	33
Renee Yap Diagnostic Radiology · Chicago, IL	12	32
Neill Peters Dermatology · Chicago, IL	12	26
Rishi Agrawal Diagnostic Radiology · Houston, TX	12	28
NPI 1982629382	11	28

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