What is Robert Bayer's specialty?

Robert Bayer (NPI 1669527818) is a Medicare-billing provider whose primary specialty is Hematology-Oncology in Geneva, IL.

Where does Robert Bayer practice?

Robert Bayer practices in Geneva, IL, based on the location reported in the CMS Medicare provider datasets for NPI 1669527818.

How much does Medicare pay Robert Bayer?

Robert Bayer (NPI 1669527818) received approximately $159K in total Medicare Part B payments, serving 533 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1669527818

Robert BayerM.D.

PRACTICECORNERSTONE MEDICAL GROUP PCSee all providers at this practice →

Hematology-OncologyGeneva, ILI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,159

Unique beneficiaries

—

Total services

1,677

Distinct HCPCS

Medicare payment

$157K

Peer benchmark

Total Medicare services vs. 444 Hematology-Oncology providers in IL — above median (cohort median 1,266).

PRESCRIBING · PART D · 2024

Total Rx claims

1,116

Beneficiaries

—

Total drug cost

$2.2M

Distinct drugs

Brand share

36.6%

Top prescribed drugs

Acyclovir126 claims

Prednisone98 claims

Apixaban74 claims

Hydroxyurea69 claims

Rivaroxaban67 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

Total received

$194

Payment records

By payment type

Education$143

Food and Beverage$50

Top paying entities

Education$143

Food and Beverage$50

REFERRAL NETWORK

Where Robert Bayer'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). 33 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
DELNOR COMMUNITY HOSPITAL	311	5,084
CENTRAL DUPAGE HOSPITAL ASSOCIATION	112	569
Kiran Talanki Diagnostic Radiology · Geneva, IL	74	383
Theodore Brock Nurse Practitioner · Geneva, IL	52	444
Kurt Williams Internal Medicine · Geneva, IL	52	373
John Kefer Internal Medicine · Geneva, IL	42	275
William Mackin Interventional Cardiology · Geneva, IL	39	203
Ross Van Dorpe Cardiology · Geneva, IL	31	207
Terry Labarre Internal Medicine · Geneva, IL	28	107
Keith Gordey Internal Medicine · Geneva, IL	26	230
Tiffany Chang Pathology · Winfield, IL	22	73
Maria Fassari Hospitalist · Janesville, WI	20	153

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