What does code 83518 cost?

Across the published hospital price files, the disclosed cash price for 83518 ranges from $227 to $1,130. This is public hospital price transparency data, not a guaranteed estimate of your bill.

Will this be my final bill?

Actual patient responsibility may vary based on your insurance plan, deductible, coinsurance, network status, diagnosis, setting, bundled services, clinical circumstances, and hospital billing practices.

83518 is the billing code hospitals use to identify "HC ALPHA DEFENSIN SYNOVIAL FLUID" on their published price files. We use it to line up the same service across different hospitals.

Why do prices for this code differ between hospitals?

Each hospital sets its own prices and negotiates separately with each insurer, so the disclosed price for the same code can vary widely from one hospital to another — and even between plans at a single hospital. Comparing the published figures is what this page is for; a difference does not by itself mean one hospital is better or worse.

What this page is not

It is not a quote, a guarantee, or medical advice. It shows what hospitals have published for this code, so you can compare and ask informed questions — your actual cost depends on your insurance, the exact services performed, and the care setting.

83518

HCPCS

HC ALPHA DEFENSIN SYNOVIAL FLUID

Verified from hospital fileNot a bill estimate

iDirect answer

Based on the latest published hospital price files, code 83518 (HC ALPHA DEFENSIN SYNOVIAL FLUID) appears at 21 hospitals with disclosed cash prices from $227 to $1,130. This is public hospital price transparency data, not a guaranteed estimate of your bill.

Published-price availability

hospitals publish a price

list this service without a published price

Cash

List

Negotiated

Allowed

A blank price (“—”) means a hospital names this service but did not publish a dollar amount — it is not a free service or a $0 price.

Compare 83518 prices

Filter by hospital, city, setting, or payer — the summary and charts update with your filters.

Based on hospital-published prices verified from each hospital’s own file. Coverage expands as data is verified.

Published cash prices for code 83518 vary by about 5× across the 18 hospitals with disclosed prices here — from $227 to $1,130. Shopping around can matter.

Hospitals

Prices shown

$227

Lowest cash

$1,130

Highest cash

code 83518 cash price26 disclosed · 18 hospitals

$227median ~$570$1,130

Lowest cash price by hospital

Cash price by city

Reflects your current filters.

Cash price by city$227 – $570

Mequon · 1 hospital$227
New Berlin · 1 hospital$227
Oak Creek · 1 hospital$227
West Bend · 1 hospital$267
Manitowoc · 1 hospital$267
Oak Lawn · 1 hospital$570

30 prices shown.

Service	Hospital	Code	List price	Cash price	Negotiated range	Allowed (median)
HC ALPHA DEFENSIN SYNOVIAL FLUID Inpatient & outpatient	Endeavor Health Edward Hospital	83518 HCPCS	$914	$914	—	—
Immunoassay dipstick Outpatient	Endeavor Health Edward Hospital	83518 HCPCS	—	—	$9.64 – $21.21	—
ALPHA DEFENSINS Inpatient	Advocate Christ Medical Center	83518 CPT	$1,140	$570	$498 – $912	—
Immunoassay dipstick Outpatient	University of Chicago Medical Center	83518 HCPCS	—	—	—	—
ALPHA DEFENSINS Outpatient	Advocate Illinois Masonic Medical Center	83518 CPT	$1,140	$570	$9.64 – $962	—
ALPHA DEFENSINS Inpatient	Advocate Lutheran General Hospital	83518 CPT	$1,140	$570	$498 – $912	—
ALPHA DEFENSINS Outpatient	Advocate Good Samaritan Hospital	83518 CPT	$1,140	$570	$9.64 – $945	—
ALPHA DEFENSINS Outpatient	Advocate South Suburban Hospital	83518 CPT	$1,140	$570	$9.64 – $1,110	—
SYNOVASURE RAPID Outpatient	Advocate South Suburban Hospital	83518 CPT	$2,260	$1,130	$9.64 – $2,201	—
SYNOVASURE RAPID Inpatient	Aurora BayCare Medical Center	83518 CPT	$1,870	$935	$1,122 – $1,590	—
ALPHA DEFENSINS Inpatient	Aurora BayCare Medical Center	83518 CPT	$1,140	$570	$684 – $969	—
ALPHA DEFENSINS Inpatient	Aurora Medical Center Burlington	83518 CPT	$1,140	$570	$684 – $969	—
SYNOVASURE RAPID Inpatient	Aurora Medical Center Burlington	83518 CPT	$1,870	$935	$1,122 – $1,590	—
ALPHA DEFENSINS Inpatient	Aurora Medical Center Bay Area	83518 CPT	$1,140	$570	$684 – $964	—
SYNOVASURE RAPID Inpatient	Aurora Medical Center Bay Area	83518 CPT	$1,870	$935	$1,122 – $1,582	—
ALPHA DEFENSINS Inpatient	Aurora Medical Center Fond du Lac	83518 CPT	$1,140	$570	$684 – $969	—
SYNOVASURE RAPID Inpatient	Aurora Medical Center Fond du Lac	83518 CPT	$1,870	$935	$1,122 – $1,590	—
SYNOVASURE RAPID Inpatient	Aurora Medical Center Grafton	83518 CPT	$1,870	$935	$1,122 – $1,590	—
ALPHA DEFENSINS Inpatient	Aurora Medical Center Grafton	83518 CPT	$1,140	$570	$684 – $969	—
ALPHA DEFENSINS Inpatient	Aurora Medical Center Kenosha	83518 CPT	$1,140	$570	$684 – $969	—
SYNOVASURE RAPID Inpatient	Aurora Medical Center Kenosha	83518 CPT	$1,870	$935	$1,122 – $1,590	—
ALPHA DEFENSINS Inpatient	Aurora Lakeland Medical Center	83518 CPT	$1,140	$570	$684 – $969	—
SYNOVASURE RAPID Inpatient	Aurora Lakeland Medical Center	83518 CPT	$1,870	$935	$1,122 – $1,590	—
HC ALPHA DEFENSIN, IA ANLYT OTH TH INFC AGNT AB/AG, SGL STEP Inpatient	Froedtert West Bend Hospital	83518 CPT	$486	$267	$292 – $462	—
HC ALPHA DEFENSIN, IA ANLYT OTH TH INFC AGNT AB/AG, SGL STEP Inpatient	Froedtert Holy Family Memorial Hospital	83518 CPT	$486	$267	$292 – $428	—

How to read these prices

Cash price: The discounted self-pay price for paying directly, without insurance.
List price: The hospital’s full undiscounted charge — rarely what anyone pays.
Negotiated rate: A rate for a specific insurer and plan; your share depends on your benefits.
Allowed amount: A historical reference for what was actually allowed, where disclosed.

Hospitals that publish 83518 prices

Open a hospital to see this code in the context of its full published prices.

Code 83518: frequently asked

What does code 83518 cost?: Across the published hospital price files, the disclosed cash price for 83518 ranges from $227 to $1,130. This is public hospital price transparency data, not a guaranteed estimate of your bill.
Will this be my final bill?: Actual patient responsibility may vary based on your insurance plan, deductible, coinsurance, network status, diagnosis, setting, bundled services, clinical circumstances, and hospital billing practices.
What is code 83518?: 83518 is the billing code hospitals use to identify "HC ALPHA DEFENSIN SYNOVIAL FLUID" on their published price files. We use it to line up the same service across different hospitals.
Why do prices for this code differ between hospitals?: Each hospital sets its own prices and negotiates separately with each insurer, so the disclosed price for the same code can vary widely from one hospital to another — and even between plans at a single hospital. Comparing the published figures is what this page is for; a difference does not by itself mean one hospital is better or worse.
What this page is not: It is not a quote, a guarantee, or medical advice. It shows what hospitals have published for this code, so you can compare and ask informed questions — your actual cost depends on your insurance, the exact services performed, and the care setting.

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