PROVIDER PROFILE · NPI 1881627446

Herbert Sier

PRACTICENORTHWESTERN MEDICAL GROUPSee all providers at this practice →

Internal MedicineChicago, ILI

MEDICARE UTILIZATION · PART B · 2024

No data available for this provider in 2024.

PRESCRIBING · PART D · 2024

No data available for this provider in 2024.

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

No data available for this provider in 2024.

REFERRAL NETWORK

Where Herbert Sier'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). 21 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Byron J Allen Internal Medicine · Orange, CA	76	398
Pranav Patel Cardiology · Orange, CA	49	232
Hiroshi Yoshioka Diagnostic Radiology · Boston, MA	33	101
Unilab Corporation Clinical Laboratory · West Hills, CA	32	129
Teferi Mitiku Internal Medicine · Orange, CA	27	152
Joseph Burns Diagnostic Radiology · Santa Barbara, CA	22	81
David Floriolli Diagnostic Radiology · Orange, CA	19	58
Marisa Tseng Diagnostic Radiology · Duarte, CA	19	51
Alpesh Amin Internal Medicine · Orange, CA	19	134
Jason Handwerker Diagnostic Radiology · San Diego, CA	18	56
Dawn Lombardo Cardiology · Orange, CA	17	57
LIPPA, LINDA	15	70

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