What is William Sierra's specialty?

William Sierra (NPI 1275552796) is a Medicare-billing provider whose primary specialty is Ophthalmology in Los Angeles, CA.

Where does William Sierra practice?

William Sierra practices in Los Angeles, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1275552796.

How much does Medicare pay William Sierra?

Medicare Part B utilization, prescribing (Part D), MIPS quality scores, and industry payments for William Sierra (NPI 1275552796) are detailed on this CareTrace profile.

PROVIDER PROFILE · NPI 1275552796

William Sierra

OphthalmologyLos Angeles, CAI

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 William Sierra'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). 3 inbound referrers · 3 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Unilab Corporation Clinical Laboratory · West Hills, CA	27	50
WHITE MEMORIAL MEDICAL CENTER	20	31
NPI 1194877191	11	13

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
Unilab Corporation Clinical Laboratory · West Hills, CA	25	70
WHITE MEMORIAL MEDICAL CENTER	24	42
MONTEBELLO MEDICAL CENTER INC.	24	59

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