LILLIAM A SIERRA (M.D.) – Developmental - Behavioral Pediatrics Physician, NPI 1275533838

LILLIAM A SIERRA (M.D.) is a healthcare provider. based in Kennewick, Washington. specializing in Developmental - Behavioral Pediatrics Physician. They hold the professional credentials M.D.. They hold a License No. MD00024390 (WA). The NPI Number for LILLIAM A SIERRA (M.D.) is 1275533838

Main info

Female
Name
LILLIAM A SIERRA (M.D.)
NPI
1275533838
Phone
(509) 374-1962
Address
7301 W DESCHUTES AVE
Enumeration Date
26 July 2005
Last Update Date
8 July 2007
Data current as of
19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology
Experience54
Completeness75
Years active:20State licenses:1Digital endpointsOther names

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Provider Addresses for LILLIAM A SIERRA (M.D.)

  • West Deschutes Avenue, Kennewick, Benton County, Washington, 99301, United States

    SUITE A

    KENNEWICK, WA 993367757

    Phone: (509) 374-1962

    Fax: (509) 374-0572

    Mailing address matches the actual address.

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

No Open Payments data available for this provider.

This can happen when there are no reportable CMS Open Payments records.

Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

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Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 99336)

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Reviews

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Frequently asked questions

Where can patients find LILLIAM A SIERRA (M.D.)'s NPI?
You can confirm LILLIAM A SIERRA (M.D.) with NPI 1275533838; it appears in the national provider directory.
Is LILLIAM A SIERRA (M.D.) active in the national directory?
LILLIAM A SIERRA (M.D.)'s public NPI profile is in an active state.
What kind of provider is LILLIAM A SIERRA (M.D.)?
The page reflects Developmental - Behavioral Pediatrics Physician for LILLIAM A SIERRA (M.D.). Clinical services aligned with this taxonomy classification.
What location shows for LILLIAM A SIERRA (M.D.)?
We surface Kennewick, Washington for LILLIAM A SIERRA (M.D.) based on available NPPES addresses.
Does Medicare enrollment show here?
Medicare enrollment screens are separate from the basic NPI extract shown here.

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