Statistical flags indicate unusual patterns — not proof of fraud or wrongdoing. Read our methodology

#1831 of 11K

Z9558

HCPCS Procedure Code

HCPCS code Z9558 is the #1,831 most-billed Medicaid procedure code, with $13.1M in payments across 20K claims from 2018–2024. The national median cost per claim is $621.02.

Total Paid

$13.1M

0.00% of all spending

Total Claims

20K

Providers

15

Avg Cost/Claim

$658

National Cost Distribution

How much do providers bill per claim for Z9558? Based on 15 providers billing this code nationally.

Median

$621.02

Average

$657.53

Std Dev

$330.00

Max

$1,598.23

Percentile Distribution (Cost per Claim)

p10
$323.01
p25
$505.79
Median
$621.02
p75
$720.47
p90
$955.24
p95
$1,240.23
p99
$1,526.63

50% of providers bill between $505.79 and $720.47 per claim for this code.

90% bill between $323.01 and $955.24.

Top 1% bill above $1,526.63.

About This Procedure

HCPCS code Z9558 was billed by 15 providers across 20K claims, totaling $13.1M in Medicaid payments from 2018–2024. This code was used for 12K unique beneficiaries.

Risk Assessment

Billing Statistics

Median Cost/Claim

$621.02

Providers Billing

15

National Spending

$13.1M

Avg/Median Ratio

1.06×

Normal distribution

Top Providers Billing This Code

Ranked by total Medicaid payments for Z9558

#ProviderTotal Paid
11922281294$8.9M
21417139825$1.1M
31649453218$815K
41366623316$704K
51619158094$409K
61386046571$360K
71114108982$332K
81134268709$105K
91528243292$102K
10County Of Santa Cruz

Santa Cruz, CA · Clinic/Center

$77K
11County Of Orange

Santa Ana, CA · Clinic/Center Mental Health (Including Community Mental Health Center)

$61K
121841472404$56K
131154470300$43K
141952582280$24K
151801077565$3K

Showing top 15 of 15 providers billing this code