(a) The health care provider must submit all medical bills to the insurance carrier except when billing the employer in accordance with subsection (j) of this section.
(b) Except as provided in Labor Code §408.0272(b), (c), or (d), a health care provider must not submit a medical bill later than the 95th day after the date the services are provided.
  (1) If a designated doctor refers an injured employee for additional testing or evaluation under §127.10 of this title, the 95-day period for timely submission of the bill begins on the date of service of the additional testing or evaluation.
  (2) In accordance with subsection (c) of the statute, the health care provider must submit the medical bill to the correct workers' compensation insurance carrier no later than the 95th day after the date the health care provider is notified of the health care provider's erroneous submission of the medical bill.
  (3) A health care provider who submits a medical bill to the correct workers' compensation insurance carrier must include a copy of the original medical bill submitted, a copy of the explanation of benefits (EOB) if available, and sufficient documentation to support why one or more of the exceptions for untimely submission of a medical bill under §408.0272 should be applied. The medical bill submitted by the health care provider to the correct workers' compensation insurance carrier is subject to the billing, review, and dispute processes established by Chapter 133, including §133.307(c)(2)(A) - (H) of this title (relating to MDR of Fee Disputes), which establishes the generally acceptable standards for documentation.
(c) A health care provider must include correct billing codes from the applicable division fee guidelines in effect on the date or dates of service when submitting medical bills.
(d) The health care provider that provided the health care must submit its own bill, unless:
  (1) the health care was provided as part of a return-to-work rehabilitation program in accordance with the division fee guidelines in effect for the dates of service;
  (2) the health care was provided by an unlicensed individual under the direct supervision of a licensed health care provider, in which case the supervising health care provider must submit the bill;
  (3) the health care provider contracts with an agent for purposes of medical bill processing, in which case the health care provider agent may submit the bill; or
  (4) the health care provider is a pharmacy that has contracted with a pharmacy processing agent for purposes of medical bill processing, in which case the pharmacy processing agent may submit the bill.
(e) A medical bill must be submitted:
  (1) for an amount that does not exceed the health care provider's usual and customary charge for the health care provided in accordance with Labor Code §§413.011 and 415.005; and
  (2) in the name of the licensed health care provider that provided the health care or that provided direct supervision of an unlicensed individual who provided the health care.
(f) Health care providers must not resubmit medical bills to insurance carriers after the insurance carrier has taken final action on a complete medical bill and provided an EOB except in accordance with §133.250 of this chapter (relating to Reconsideration for Payment of Medical Bills).
(g) Health care providers may correct and resubmit as a new bill an incomplete bill that has been returned by the insurance carrier.
(h) Not later than the 15th day after receipt of a request for additional medical documentation, a health care provider must submit to the insurance carrier:
  (1) any requested additional medical documentation related to the charges for health care rendered; or
  (2) a notice the health care provider does not possess requested medical documentation.
(i) The health care provider must indicate on the medical bill if documentation is submitted related to the medical bill.
(j) The health care provider may elect to bill the injured employee's employer if the employer has indicated a willingness to pay the medical bill or bills. Such billing is subject to the following:
  (1) A health care provider who elects to submit medical bills to an employer waives, for the duration of the election period, the rights to:
    (A) prompt payment, as provided by Labor Code §408.027;
    (B) interest for delayed payment as provided by Labor Code §413.019; and
    (C) medical dispute resolution as provided by Labor Code §413.031.
  (2) When a health care provider bills the employer, the health care provider must submit an information copy of the bill to the insurance carrier, which clearly indicates that the information copy is not a request for payment from the insurance carrier.
  (3) When a health care provider bills the employer, the health care provider must bill in accordance with the division's fee guidelines and §133.10 of this chapter (relating to Required Billing Forms/Formats).
  (4) A health care provider must not submit a medical bill to an employer for charges an insurance carrier has reduced, denied, or disputed.
(k) A health care provider must not submit a medical bill to an injured employee for all or part of the charge for any of the health care provided, except as an informational copy clearly indicated on the bill, or in accordance with subsection (l) of this section. The information copy must not request payment.
(l) The health care provider may only submit a bill for payment to the injured employee in accordance with:
  (1) Labor Code §413.042;
  (2) Insurance Code §1305.451; or
  (3) §134.504 of this title (relating to Pharmaceutical Expenses Incurred by the Injured Employee).
(m) A designated doctor must include the assignment number on the medical bill in accordance with §133.10 of this title (relating to Required Billing Forms/Formats).
(n) A designated doctor who refers the injured employee for additional testing or evaluation under §127.10 must provide the assignment number to the health care provider performing the testing or evaluation. The health care provider performing the testing or evaluation must include the assignment number on the medical bill in accordance with §133.10.
(o) This section is effective for medical bills submitted on or after June 1, 2024, including medical bills submitted as a result of an examination that was ordered or referred as the result of an order issued on or after June 1, 2024.

Source Note: The provisions of this §133.20 adopted to be effective May 2, 2006, 31 TexReg 3544; amended to be effective January 29, 2009, 34 TexReg 430; amended to be effective June 1, 2024, 49 TexReg 1478