What does code 80164 cost?

Across the published hospital price files, the disclosed cash price for 80164 ranges from $16.00 to $394. 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.

80164 is the billing code hospitals use to identify "Valproic Acid, Free, Total, S 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.

80164

CPT

Valproic Acid, Free, Total, S Ref

Verified from hospital fileNot a bill estimate

iDirect answer

Based on the latest published hospital price files, code 80164 (Valproic Acid, Free, Total, S Ref) appears at 44 hospitals with disclosed cash prices from $16.00 to $394. 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 80164 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 80164 vary by about 25× across the 43 hospitals with disclosed prices here — from $16.00 to $394. Shopping around can matter.

Hospitals

Prices shown

$16.00

Lowest cash

$394

Highest cash

code 80164 cash price54 disclosed · 43 hospitals

$16.00median ~$120$394

Lowest cash price by hospital

Carle Foundation Hospital$16.00
Methodist Medical Center of Illinois$16.00
Carle BroMenn Medical Center$16.00
The Women's Hospital$20.39
Stanford Health Care$20.67
Providence St Joseph Medical Center$28.80

Cash price by city

Reflects your current filters.

Cash price by city$16.00 – $370

Urbana · 1 hospital$16.00
Peoria · 1 hospital$16.00
Normal · 1 hospital$16.00
Newburgh · 1 hospital$20.39
Stanford · 1 hospital$20.67–$370
Polson · 1 hospital$28.80–$101

57 prices shown.

Service	Hospital	Code	List price	Cash price	Negotiated range	Allowed (median)
Valproic Acid, Free, Total, S Ref Inpatient	Carle Foundation Hospital	80164 CPT	$16.00	$16.00	$1.60 – $11.99	—
HC DIPROPYLACETIC ACID (VALPROIC ACID) Inpatient & outpatient	Endeavor Health Edward Hospital	80164 HCPCS	$252	$252	—	—
Assay dipropylacetic acd tot Outpatient	Endeavor Health Edward Hospital	80164 HCPCS	—	—	$13.54 – $22.95	—
Valproic Acid, Free, Total, S Ref Inpatient	Methodist Medical Center of Illinois	80164 CPT	$16.00	$16.00	$1.60 – $11.99	—
Hc Valproic Acid; Total Inpatient & outpatient	University of Chicago Medical Center	80164 HCPCS	—	—	—	—
Assay dipropylacetic acd tot Outpatient	University of Chicago Medical Center	80164 HCPCS	—	—	—	—
Valproic Acid, Free, Total, S Ref Inpatient	Carle BroMenn Medical Center	80164 CPT	$16.00	$16.00	$1.60 – $11.99	—
HB VALPROIC ACID/DEPAKENE ASSAY* Inpatient & outpatient	Endeavor Health Swedish Hospital	80164 HCPCS	$247	$247	—	—
VALPROIC ACID TOTAL Outpatient	Advocate South Suburban Hospital	80164 CPT	$180	$90.00	$13.54 – $175	—
HC DRUG ASSAY, VALPROIC ACID (DIPROPYLACETIC ACID), TOTAL Outpatient	Froedtert Hospital	80164 CPT	$190	$105	$13.17 – $164	—
HC DRUG ASSAY, VALPROIC ACID (DIPROPYLACETIC ACID), TOTAL Outpatient	Froedtert Menomonee Falls Hospital	80164 CPT	$184	$101	$13.54 – $166	—
VALPROIC ACID TOTAL Inpatient	Aurora BayCare Medical Center	80164 CPT	$245	$123	$147 – $208	—
VALPROIC ACID TOTAL Inpatient	Aurora Medical Center Burlington	80164 CPT	$245	$123	$147 – $208	—
Valproic Acid Level Inpatient	Munson Healthcare Charlevoix Hospital	80164 CPT	$113	$96.05	$90.40 – $113	—
Valproic Acid Level Inpatient	Munson Healthcare Manistee Hospital	80164 CPT	$108	$91.80	$54.18 – $852	—
VALPROIC ACID TOTAL Inpatient	Aurora Medical Center Bay Area	80164 CPT	$245	$123	$147 – $207	—
VALPROIC ACID TOTAL Inpatient	Aurora Medical Center Fond du Lac	80164 CPT	$245	$123	$147 – $208	—
VALPROIC ACID TOTAL Inpatient	Aurora Medical Center Grafton	80164 CPT	$245	$123	$147 – $208	—
VALPROIC ACID TOTAL Inpatient	Aurora Medical Center Kenosha	80164 CPT	$245	$123	$147 – $208	—
VALPROIC ACID TOTAL Inpatient	Aurora Lakeland Medical Center	80164 CPT	$245	$123	$147 – $208	—
HC DRUG ASSAY, VALPROIC ACID (DIPROPYLACETIC ACID), TOTAL Inpatient	Froedtert West Bend Hospital	80164 CPT	$184	$101	$110 – $175	—
HC DRUG ASSAY, VALPROIC ACID (DIPROPYLACETIC ACID), TOTAL Inpatient	Froedtert Community Hospital - Mequon	80164 CPT	$157	$86.08	$93.90 – $138	—
HC DRUG ASSAY, VALPROIC ACID (DIPROPYLACETIC ACID), TOTAL Outpatient	Froedtert Community Hospital - New Berlin	80164 CPT	$157	$86.08	$13.54 – $138	—
Valproic Acid Level Inpatient	Kalkaska Memorial Health Center	80164 CPT	$112	$95.20	$82.88 – $852	—
Valproic Acid Level Inpatient	Munson Healthcare Cadillac	80164 CPT	$82.00	$69.70	$49.20 – $852	—

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 80164 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 Advocate South Suburban Hospital Froedtert Hospital Froedtert Menomonee Falls Hospital Aurora BayCare Medical Center Aurora Medical Center Burlington Munson Healthcare Charlevoix Hospital Munson Healthcare Manistee Hospital Aurora Medical Center Bay Area Aurora Medical Center Fond du Lac Aurora Medical Center Grafton Aurora Medical Center Kenosha Aurora Lakeland Medical Center Froedtert West Bend Hospital Froedtert Community Hospital - Mequon Froedtert Community Hospital - New Berlin Kalkaska Memorial Health Center Munson Healthcare Cadillac Munson Medical Center Deaconess Gibson Hospital Deaconess Union County Hospital The Women's Hospital Deaconess Illinois Medical Center Providence Alaska Medical Center Providence Kodiak Island Medical Center Stanford Health Care Stanford Health Care Tri-Valley Providence Seward Hospital Providence Valdez Medical Center St Elias Specialty Hospital Healdsburg Hospital Providence Cedars-Sinai Tarzana Medical Center Providence Holy Cross Medical Center Providence Little Co of Mary Med Center San Pedro Texas Health Center for Diagnostics and Surgery Plano Providence Little Company of Mary Med Center Torrance Providence Saint John's Health Center Providence Saint Joseph Medical Center Providence St Joseph Medical Center

Code 80164: frequently asked

What does code 80164 cost?: Across the published hospital price files, the disclosed cash price for 80164 ranges from $16.00 to $394. 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 80164?: 80164 is the billing code hospitals use to identify "Valproic Acid, Free, Total, S 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