CPT 99359
Sep 3, 2025
IBR Chicken: ESIS Denies Common CPT Codes as "Invalid"
Third-Party Administrator (TPA) ESIS’s apparent lack of basic knowledge about California workers’ comp billing should concern insurers like Safety National Casualty Corporati...
Mar 15, 2023
CPT 99358 & 99359: How to Appeal Payment Denials
In workers’ comp billing, some procedure codes are trickier than others.Two of the best examples are CPT codes 99358 and 99359, used by providers to report prolonged n...
Feb 22, 2023
CPT 99358 & 99359: Payable in 2023
California workers’ comp billing is complicated — but that’s what daisyBill is here for.Effective February 15, 2023, an update to the Official Medical Fee Schedule (OM...
Feb 21, 2023
CPT 99358 & 99359: Error Corrected
With apologies for any confusion, we offer the following correction.Our February 13 2023 article, clarifying that billing codes CPT 99358 and CPT 99359 remain payable ...
Feb 5, 2020
CPTs 99358 & 99359 - 2020 CA Reimbursement Cheat Sheet
Changes have been made to the California OMFS since the publication of this article. Be sure to see the latest analyses here and here.2021 OMFS updates drastically cha...
Feb 19, 2019
IBR Appeal Analysis for CPTs 99358 & 99359
**Update: The 2021 OMFS updates drastically changed how E/M codes are billed.*Reimbursements for CPTs 99358 & 99359 are tricky because payers frequently deny reimburse...
Sep 19, 2018
Time and Billable Units for CPT Codes 99358 and 99359
Changes have been made to the California OMFS since the publication of this article. Be sure to see the latest analyses here and here.2021 OMFS updates drastically cha...