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CMS Price Transparency Data Hospital file updated: 4/1/2026

Breast lump removal

Facility: Kaiser Foundation Hospital Fontana/Ontario

Billing Code: 19120 (CPT)

Pillar 1 · The BaseRate™ CompositeHow 1.00× Fair BaseRate Works: Raw price averages unfairly penalize hospitals in high-wage cities or trauma centers treating sicker patients. We adjust for local CMS hospital wage levels and patient complexity first. A 1.00× score means right at the fair price average, 0.85× means 15% cheaper than fair market, and 1.30× means 30% above fair market.Near Fair BaseRate Benchmark
$4,655Fair BaseRate (1.00× Market)
Position vs. 1.00× Fair PriceRight at U.S. Average (0%) 1.00× (center of the bar) is the U.S. fair price average after accounting for local hospital wages and patient complexity. Left of center (<1.00×) is below fair price; right of center (>1.00×) is above fair price.

This hospital's typical commercial price is $4,653 compared to the $4,655 fair price benchmark.

Pillar 2 · VeriRate™ Data TrustHow VeriRate™ (0–100) Works: Hospitals are legally required to publish machine-readable price files, but some bury fake $0.01 numbers or omit cash discounts. VeriRate audits each file across 5 checks (hover any badge below to see what it tests).86/100 · Verified
86/100Hover Any Check Below to See How Prices Were Audited
File Completeness90Provenance (File Completeness): Checks whether the hospital published a complete, up-to-date machine-readable price file with valid CPT and MS-DRG billing codes instead of leaving blanks.
Price Logic88Coherence (Price Logic): Checks whether the hospital’s numbers make basic sense — e.g., self-pay cash price is lower than gross list price, with no fake $0.01 or $999,999 placeholder numbers.
Peer Alignment86Concordance (Peer Alignment): Checks whether reported prices sit in a realistic range compared to Medicare and nearby hospitals rather than wild 100× unit errors.
Clean Billing83Regularity (Clean Billing): Checks whether rates are structured consistently across procedures without erratic statistical spikes or hidden unbundled facility fees.
Real Cash Discount84Cash Honesty (Real Cash Discount): Checks whether the hospital offers a genuine self-pay cash discount that beats or matches commercial insurance rates instead of billing full sticker price.
Pillar 3 · Clinical Quality & ER SpeedChecks whether higher hospital prices actually buy better clinical quality — combining CMS Star Ratings, hospital safety scores, and emergency room wait times.Regional Quality Benchmark
CMS Star Rating3/5 StarsOfficial CMS Overall Hospital Quality Star Rating (1 to 5 stars) summarizing mortality, safety of care, readmissions, and patient experience.
Safety Score60/100Composite patient safety score (0–100) derived from CMS hospital-acquired infection rates (CLABSI, CAUTI, MRSA, C. diff), surgical complications, and HCAHPS surveys.
Typical ER WaitNo ER DataMedian minutes patients spent in the emergency department before leaving from the visit, as reported to CMS Timely and Effective Care.

3-Star CMS clinical quality rating paired with 1.00× fair market pricing.

The BaseRate · fair price medium confidence
A fair price for this
$4,655
about 1.2× the $4,000 Medicare rate · typically $1,579–$6,445
modeled estimate · not a bill or quote
What this hospital charges insurers
$4,653
About the fair price
about $2 under the fair price · 1.2× Medicare
Medicare pays $4,000 Fair price $4,655 This hospital $4,653 Cash price $4,196 Hospital's list price $8,070

How we calculate the fair BaseRate →

How this hospital compares to other CA hospitals

Highest price of the 9 CA hospitals we have prices for — worth calling around.

Cheapest $445 Priciest $4,653

Black dot = this hospital, among the 9 CA hospitals with a price for this procedure. Full list below.

A fair price for a Breast lump removal is about $4,655 (about 1.2× the $4,000 Medicare rate). Kaiser Foundation Hospital Fontana/Ontario charges insurers about $4,653, or about $4,196 in cash — about the fair price. Located in Fontana, CA.

What each insurance company pays

Which insurers have negotiated a price with this hospital for this procedure — and which haven’t.

1 of 6 major insurers have a published price at this hospital

Kaiser Permanente UnitedHealthcareBlue Cross Blue ShieldAetnaCignaHumana

Crossed out = this hospital hasn’t published a negotiated price for that insurer for this procedure. It doesn’t necessarily mean they aren’t accepted — ask your insurer.

Insurance company Price range vs. Medicare
Kaiser Permanentemajor $3,799 - $11,299 95%

Self-Pay How to get the cash price

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Facility Profile & Credentials

  • Address: 9961 Sierra Ave, Fontana, CA 92335
  • CMS Rating: 3 / 5 Stars
  • Ownership Type: Voluntary non-profit - Private
  • Hospital Type: Acute Care Hospitals

Other Procedures at Kaiser Foundation Hospital Fontana/Ontario

Compare: Breast lump removal at other CA hospitals

Insurance negotiated median for the same procedure, sorted lowest first.

Inline Bill X-Ray & 501(r) Calculator 501(c)(3) Nonprofit · Free Care ≤200% FPL · AGB Cap 36.3%

Audit a Bill or Quote at Kaiser Foundation Hospital Fontana/Ontario (Zero PHI Required)

CMS CCN: 050140
CPT 19120
Fair BaseRate™ $4,655
Medicare Rate $4,000
Self-Pay Cash $4,196
Insurer Median $4,653
Pre-filled with Kaiser Foundation Hospital Fontana/Ontario’s charged/list benchmark
Screened against 2026 HHS Federal Poverty Guidelines
2026 FPL: $15,650 + $5,500 per additional person
Step 1 · 501(r) Charity Care Check 501(r) AGB Cap: $2,929 (274% FPL)

Statutory 501(r) AGB Cap Limits Bill to $2,929

At 274% FPL (201%–400% FPL tier), 26 U.S.C. § 501(r)(5) caps FAP-eligible bills at Amounts Generally Billed (36.3% of gross = $2,929).

Step 2 · Cash vs. Insurance Arbitrage Save $3,874 Paying Cash

Self-Pay Cash Rate ($4,196) Beats Your Bill

Kaiser Foundation Hospital Fontana/Ontario's published 45 CFR § 180 self-pay cash rate is $4,196 (vs. $4,653 commercial insurer median). Ask billing to reclassify the visit to prompt-pay self-pay if it beats your deductible.

Step 3 · Fair BaseRate Target +$3,415 Above Fair BaseRate

Negotiate Toward $4,655 Fair BaseRate ($4,000 Medicare)

Your bill ($8,070) is $3,415 above the denoised Fair BaseRate ($4,655) and 2.0× the $4,000 Medicare rate.

1-Click Factual Dispute Summary: Copy a citation-backed benchmark memo (with CMS CCN, CPT code, Medicare reference, Fair BaseRate, and 26 U.S.C. § 501(r) calculations) to paste into patient-portal messages or billing appeals.
CMS Care Compare Public Quality Record

Clinical Quality, Patient Experience & Infection Benchmarks

CMS Overall3/5 Stars (3/5)

Source: CMS Hospital Care Compare. Clinical quality metrics summarize historical facility-wide cohorts and are not medical advice for individual care decisions.

Care-Setting Arbitrage, Bilateral SVD Insurer Leverage & Regional Alternatives

How to Pay Less Nearby: Freestanding Centers, Insurer Leverage & Outpatient Savings

45 CFR § 180 Primary-Source Lineage & Federal Verification Verified CMS CCN 050140

Verify the Raw Data: Official Hospital MRF, CMS Medicare.gov & Federal Filings

MRF Portal Indexed (941105628-ontario-medical-center-standard-charges-scal-en.csv) Verify on CMS Medicare.gov (CCN 050140) ↗ CMS HCRIS Cost Reports ↗
Published MRF File941105628-ontario-medical-center-standard-charges-scal-en.csv
Publication / Vintage4/1/2026 · 199.57 MB
Validated Rate Rows88,909 (CMS v3.0.1)
File Integrity Digest468194aee1f69aab9db3…

Safe-Harbor Data Corrections: Parsed directly from public 45 CFR § 180 hospital filings, CMS Care Compare, and CMS HCRIS cost reports. Hospital compliance officers may submit updated MRF URLs or rate tables for verification.

Submit MRF Update Correction Policy