What does code 83661 cost?

Across the published hospital price files, the disclosed cash price for 83661 ranges from $126 to $386. 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.

83661 is the billing code hospitals use to identify "L/S Ratio, Amnio Ref" 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.

83661

CPT

L/S Ratio, Amnio Ref

Verified from hospital fileNot a bill estimate

iDirect answer

Based on the latest published hospital price files, code 83661 (L/S Ratio, Amnio Ref) appears at 13 hospitals with disclosed cash prices from $126 to $386. 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 83661 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 83661 vary by about 3.1× across the 10 hospitals with disclosed prices here — from $126 to $386. Shopping around can matter.

Hospitals

Prices shown

$126

Lowest cash

$386

Highest cash

code 83661 cash price11 disclosed · 10 hospitals

$126median ~$173$386

Lowest cash price by hospital

Cash price by city

Reflects your current filters.

Cash price by city$126 – $212

Morganfield · 1 hospital$126
Marinette · 1 hospital$158
Urbana · 1 hospital$173
Peoria · 1 hospital$173
Normal · 1 hospital$173
Chicago · 1 hospital$212

16 prices shown.

Service	Hospital	Code	List price	Cash price	Negotiated range	Allowed (median)
L/S Ratio, Amnio Ref Inpatient	Carle Foundation Hospital	83661 CPT	$173	$173	$17.30 – $114	—
HC FETA LUNG MATURITY ASSESSMENT LS RATIO Inpatient & outpatient	Endeavor Health Edward Hospital	83661 HCPCS	$275	$275	—	—
L/s ratio fetal lung Outpatient	Endeavor Health Edward Hospital	83661 HCPCS	—	—	$21.99 – $37.25	—
L/S Ratio, Amnio Ref Inpatient	Methodist Medical Center of Illinois	83661 CPT	$173	$173	$17.30 – $114	—
Hc Fetal Lung Maturity Assessment; Lecithin Sphingomyelin Ratio Inpatient & outpatient	University of Chicago Medical Center	83661 HCPCS	—	—	—	—
L/s ratio fetal lung Outpatient	University of Chicago Medical Center	83661 HCPCS	—	—	—	—
L/S Ratio, Amnio Ref Inpatient	Carle BroMenn Medical Center	83661 CPT	$173	$173	$17.30 – $114	—
HB R L/S RATIO (P) Inpatient & outpatient	Endeavor Health Swedish Hospital	83661 HCPCS	$212	$212	—	—
LS RATIO Inpatient	Aurora Medical Center Bay Area	83661 CPT	$315	$158	$189 – $266	—
LS RATIO Outpatient	Aurora Medical Center Bay Area	83661 CPT	$315	$158	$17.59 – $266	—
L/S RATIO FETAL LUNG Outpatient	Aurora Medical Center Fond du Lac	83661 CPT	—	—	$17.59 – $77.17	—
HC FETAL MATURITY PROF LS RATIO Inpatient	Deaconess Union County Hospital	83661 CPT	$269	$126	$126 – $261	—
HC FETAL MATURITY PROF LS RATIO Outpatient	The Women's Hospital	83661 CPT	$547	$323	$8.80 – $465	—
HC FETAL LUNG MATURITY LECITHIN SPHINGOMYELIN RATIO CDM Inpatient & outpatient	Providence Alaska Medical Center	83661 HCPCS	$495	$386	—	—
L/S RATIO FETAL LUNG Outpatient	Texas Health Center for Diagnostics and Surgery Plano	83661 CPT	—	—	$18.47 – $43.14	—
HC FETAL LUNG MATURITY LECITHIN SPHINGOMYELIN RATIO CDM Inpatient & outpatient	Providence St Joseph Medical Center	83661 HCPCS	$319	$255	—	—

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 83661 prices

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

Carle Foundation Hospital Endeavor Health Edward Hospital Methodist Medical Center of Illinois University of Chicago Medical Center Carle BroMenn Medical Center Endeavor Health Swedish Hospital Aurora Medical Center Bay Area Aurora Medical Center Fond du Lac Deaconess Union County Hospital The Women's Hospital Providence Alaska Medical Center Texas Health Center for Diagnostics and Surgery Plano Providence St Joseph Medical Center

Code 83661: frequently asked

What does code 83661 cost?: Across the published hospital price files, the disclosed cash price for 83661 ranges from $126 to $386. 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 83661?: 83661 is the billing code hospitals use to identify "L/S Ratio, Amnio Ref" 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.

All CPT / HCPCS codes Browse hospitals How to read this data

Hospitals publishing code 83661 by state

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