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Federal contractor profile

HSIAO, ESTHER Y M.D.

UEI SZ6HA32DDF59CAGE 9KU37

Active
Small Business

Overview

Legal name
HSIAO, ESTHER Y M.D.
Registered location
RIVERSIDE, CA, USA
Primary NAICS
621111 — Offices of Physicians (except Mental Health Specialists)
Latest award activity
May 21, 2025
Read company summary

HSIAO, ESTHER Y M.D. is associated with UEI SZ6HA32DDF59 and CAGE 9KU37 in public federal records. AcornBids currently links 2 prime awards totaling $56.1K in obligations to this entity. Its largest recorded federal customer by obligations is Social Security Administration. Its recorded federal awards include work classified as Offices of Physicians (except Mental Health Specialists). These categories describe the loaded award records, not a complete list of company capabilities. Its primary SAM.gov NAICS is 621111 (Offices of Physicians (except Mental Health Specialists)). Its public SAM.gov registration lists RIVERSIDE, CA, USA.

At a glance

Lifetime prime obligations$56.1K
Prime awards2
Awards with future end dates0
Top-agency concentration
Not available

Why this customer concentration

Detailed agency totals are not available in this stored profile.

Largest positive coded-agency total ÷ all positive coded-agency totals × 100

Missing data is shown as unavailable.

Prime contract obligations across loaded award records. Obligations are not revenue or contract ceilings. Summary updated Oct 5, 2026. Refresh pending; these totals may be out of date.

Business information

Public SAM.gov registration details.

Legal name
HSIAO, ESTHER Y M.D.
UEI
SZ6HA32DDF59
CAGE
9KU37
Registered address
9251 SHAMOUTI DR, RIVERSIDE, CA, 92508, USA
Registration status
Active
Primary NAICS
621111 — Offices of Physicians (except Mental Health Specialists)
SAM activation
Nov 24, 2025
Initial registration
May 24, 2023
Entity start
Oct 1, 2015
SAM updated
Nov 24, 2025
Registration expires
Nov 20, 2026
Fiscal year end
Dec 31
Place of incorporation
CA, USA

View SAM.gov source

Research brief

Source facts

  • Loaded prime-award records link 2 awards and $56,110 in reported obligations to this legal entity. Source
  • Recorded awards include Offices of Physicians (except Mental Health Specialists) (NAICS 621111); this classification is not proof of every company capability. Source
  • An example award describes: BLANKET PURCHASE AGREEMENT FOR CONTRACTOR TO PROVIDE MEDICAL CONSULTANT SERVICES FOR THE SOCIAL SECURITY ADMINISTRATION, OFFICE OF DISABILITY DETERMINATIONS. REVIEWS BY MEDICAL CONSULTANT OF DISABILITY CLAIM CASE FILES FOR AGENCY DISABILITY PROGRAM. Source

Federal award analysis

Net transaction obligations by federal fiscal period.

Selected transaction obligations$31.8K
Prime contracts
$31.8KFY2025

Reported transaction obligations by federal fiscal period; includes deobligations. Missing transactions are not estimated. Coverage: 2 of 2 selected awards. Select a period to explore its awards.

Explore funding & geography →View quarterly funding

Recent federal awards

Prime contract awards. Select an award to review its history and source evidence.

Award / descriptionAwarding agencyObligationsStart dateEnd date
28321325FAC010025BLANKET PURCHASE AGREEMENT FOR CONTRACTOR TO PROVIDE MEDICAL CONSULTANT SERVICES FOR THE SOCIAL SECURITY ADMINISTRATION, OFFICE OF DISABILITY DETERMINATIONS. REVIEWS BY MEDICAL…Social Security Administration$35.9KJun 1, 2025May 31, 2026
28321324FAC010008BLANKET PURCHASE AGREEMENT FOR CONTRACTOR TO PROVIDE MEDICAL CONSULTANT SERVICES FOR THE SOCIAL SECURITY ADMINISTRATION, OFFICE OF MEDICAL ASSISTANCE. REVIEWS BY MEDICAL…Social Security Administration$20.2KJan 5, 2024Sep 30, 2024
Explore, filter and export all awards →SubcontractsGrants & subgrants

Registration, certifications & contacts

Registration evidenceDate
SAM updatedNov 24, 2025
Source loadedSep 26, 2026
Initial registrationMay 24, 2023
Entity startOct 1, 2015

Registration classifications: Small Business. These are separate from the reported certificates above.

IndustryReported size status
621111 — Offices of Physicians (except Mental Health Specialists)Not reported
ContactRolePublished contact methodsEvidenceSource date
ESTHER HSIAOGovernment businessContact method not publishedSAM registrationNot available
ESTHER HSIAOElectronic businessContact method not publishedSAM registrationNot available
Registered industries
  • 621111 — Offices of Physicians (except Mental Health Specialists)

Registration classifications and published certificates do not by themselves establish eligibility for a particular solicitation. View SAM source

Related companies worth researching

Explore the customer, work and award-size evidence behind each match.

A AND N SERVICES, INC.

1 shared agency customer(s); Shared work: 621111 — Offices of Physicians (except Mental Health Specialists); Average reported award size within 0.5–2× in matching records. Counts and amounts describe sampled matching awards, not the company’s full history.
1 awards

SERGIO BELLO MD

1 shared agency customer(s); Shared work: 621111 — Offices of Physicians (except Mental Health Specialists); Average reported award size within 0.5–2× in matching records. Counts and amounts describe sampled matching awards, not the company’s full history.
2 awards

KHURANA MD HARPREET

1 shared agency customer(s); Shared work: 621111 — Offices of Physicians (except Mental Health Specialists); Average reported award size within 0.5–2× in matching records. Counts and amounts describe sampled matching awards, not the company’s full history.
3 awards

LAZAROS XANTHOPOULOS

1 shared agency customer(s); Shared work: 621111 — Offices of Physicians (except Mental Health Specialists); Average reported award size within 0.5–2× in matching records. Counts and amounts describe sampled matching awards, not the company’s full history.
3 awards

VAGHARI ANESTHESIA, LLC

1 shared agency customer(s); Shared work: 621111 — Offices of Physicians (except Mental Health Specialists); Average reported award size within 0.5–2× in matching records. Counts and amounts describe sampled matching awards, not the company’s full history.
1 awards

JACK W. MCWATTERS, MD, PA

1 shared agency customer(s); Shared work: 621111 — Offices of Physicians (except Mental Health Specialists); Average reported award size within 0.5–2× in matching records. Counts and amounts describe sampled matching awards, not the company’s full history.
1 awards

About HSIAO, ESTHER Y M.D.

What products and services appear in its federal awards?

Recorded award industries: 621111 — Offices of Physicians (except Mental Health Specialists).

Recorded products and services: Q999 — Other Medical Services; Q526 — Medical/Psychiatric Consultation Services.

Examples from recent award records:

These records describe federal award work, not every company capability. Review the award evidence.

Where is the company registered?

9251 SHAMOUTI DR, RIVERSIDE, California 92508, United States

Registered location from SAM.gov; award performance locations may differ.

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Data coverage and methodology

Sources: SAM.gov registration, USAspending awards and transactions, and linked supporting records. Prime contract obligations, IDV ceilings and assistance amounts are kept separate. Missing records are not zero activity. Company claims are labeled separately. Recompete signals are rule-based scores out of 100. Positioning windows are AcornBids estimates.

Disclosed relationships only. Missing records do not establish that a contractor has no partners. Ambiguous parent award identifiers are excluded.

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