Section 4603.2.
Cal. Labor Code - LAB § 4603.2.
in effect(a)
(1)
Upon selecting a physician pursuant to Section 4600, the employee or physician shall notify the employer of the name and address, including the name of the medical group, if applicable, of the physician. The physician shall submit a report to the employer within five working days from the date of the initial examination, as required by Section 6409, and shall submit periodic reports at intervals that may be prescribed by rules and regulations adopted by the administrative director.
(2)
If the employer objects to the employee’s selection of the physician on the grounds that the physician is not within the medical provider network used by the employer, and
there is a final determination that the employee was entitled to select the
physician pursuant to Section 4600, the employee shall be entitled to continue treatment with that physician at the employer’s expense in accordance with this division, notwithstanding Section 4616.2. The employer shall be required to pay from the date of the initial examination if the physician’s report was submitted within five working days of the initial examination. If the physician’s report was submitted more than five working days after the initial examination, the employer and the employee shall not be required to pay for any services prior to the date the physician’s report was submitted.
(3)
If the employer objects to the employee’s selection of the physician on the grounds that the physician is not within the medical provider network used by the employer, and there is a final determination that the employee was
not entitled to select a physician outside of the medical provider network, the employer is not liable for treatment provided by or at the direction of that physician or for any consequences of the treatment obtained outside the network.
(b)
(1)
(A)
A provider of services provided pursuant to Section 4600, including, but not limited to, physicians, hospitals, pharmacies, interpreters, copy services, transportation services, and home health care services, shall submit its request for payment with an itemization of services provided and the charge for each service, a copy of all reports showing the services performed, the prescription or referral from the primary treating physician if the services were performed by a person other than the primary treating physician, and any evidence of authorization for
the services that may have been received. This section does not prohibit an employer, insurer, or third-party claims administrator from establishing, through written agreement, an alternative manual or electronic request for payment with providers for services provided pursuant to Section 4600.
(B)
Effective for services provided on or after January 1, 2017, the request for payment with an itemization of services provided and the charge for each service shall be submitted to the employer within 12 months of the date of service or within 12 months of the date of discharge for inpatient facility services. The administrative director shall adopt rules to implement the 12-month limitation period. The rules shall define circumstances that constitute good cause for an exception to the 12-month period, including provisions to address the
circumstances of a nonoccupational injury or illness later found to be a compensable injury or illness. The request for payment is barred unless timely submitted.
(C)
The request for payment with an itemization of services provided and the charge for each service shall be submitted to the employer with the national provider identifier (NPI) number for the physician or provider who provided the service for which payment is
sought in accordance with rules adopted by the administrative director pursuant to Section 4603.4. Failure to include the physician’s or provider’s NPI shall result in the request for payment being barred until the physician’s or provider’s NPI is submitted with the request for payment. This subparagraph does not preclude an employer, insurer, pharmacy benefit manager, or third-party claims administrator from requiring the
physician’s
or provider’s NPI at an earlier date. This subparagraph is declaratory of existing law.
(D)
Notwithstanding the requirements of this paragraph, a copy of the prescription shall not be required with a request for payment for pharmacy services, unless the provider of services has entered into a written agreement, as provided in this paragraph, that requires a copy of a prescription for a pharmacy service.
(E)
This section does not preclude an employer, insurer, pharmacy benefits manager, or third-party claims administrator from requesting a copy of the prescription during a review of any records of prescription drugs that were dispensed by a pharmacy.
(2)
Except as provided in subdivision (d) of Section 4603.4, or under contracts authorized under Section 5307.11, payment for medical treatment provided or prescribed by the treating physician selected by the employee or designated by the employer shall be made at reasonable maximum amounts in the official medical fee schedule, pursuant to Section 5307.1, in effect on the date of service. Payments shall be made by the employer with an explanation of review pursuant to Section 4603.3 within 45 days after receipt of each separate itemization of medical services provided, together with any required reports and any written authorization for services that may have been received by the physician. If the itemization or a portion thereof is contested, denied, or considered incomplete, the physician shall be notified, in the explanation of
review, that the itemization is contested, denied, or considered incomplete, within 30 days after receipt of the itemization by the employer. An explanation of review that states an itemization is incomplete shall also state all additional information required to make a decision. A properly documented list of services provided and not paid at the rates then in effect under Section 5307.1 within the 45-day period shall be paid at the rates then in effect and increased by 15 percent, together with interest at the same rate as judgments in civil actions retroactive to the date of receipt of the itemization, unless the employer does both of the following:
(A)
Pays the provider at the rates in effect within the 45-day period.
(B)
Advises, in an explanation of review pursuant
to Section 4603.3, the physician, or another provider of the items being contested, the reasons for contesting these items, and the remedies available to the physician or the other provider if the physician or provider disagrees. In the case of an itemization that includes services provided by a hospital, outpatient surgery center, or independent diagnostic facility, advice that a request has been made for an audit of the itemization shall satisfy the requirements of this paragraph.
An employer’s liability to a physician or another provider under this section for delayed payments shall not affect its liability to an employee under Section 5814 or any other provision of this division.
(3)
Notwithstanding paragraph (1), if the employer is a governmental entity, payment for medical treatment provided or
prescribed by the treating physician selected by the employee or designated by the employer shall be made within 60 days after receipt of each separate itemization, together with any required reports and any written authorization for services that may have been received by the physician.
(4)
Duplicate submissions of medical services itemizations, for which an explanation of review was previously provided, shall require no further or additional notification or objection by the employer to the medical provider and shall not subject the employer to any additional penalties or interest pursuant to this section for failing to respond to the duplicate submission. This paragraph applies only to duplicate submissions and does not apply to any other penalties or interest that may be applicable to the original submission.
(5)
(A)
An employer may defer objecting to or paying any bill submitted by, or on behalf of, a provider whose liens are stayed pursuant to Section 4615, and the time limits for taking any action prescribed by paragraphs (2) and (3) shall not commence until the stay is lifted pursuant to Section 4615.
(B)
An employer may object to any bill submitted by, or on behalf of, a provider who has been suspended pursuant to Section 139.21.
(c)
Interest or an increase in compensation paid by an insurer pursuant to this section shall be treated in the same manner as an increase in compensation under subdivision (d) of Section 4650 for the purposes of any classification of risks and premium rates, and
any system of merit rating approved or issued pursuant to Article 2 (commencing with Section 11730) of Chapter 3 of Part 3 of Division 2 of the Insurance Code.
(d)
(1)
Whenever an employer or insurer employs an individual or contracts with an entity to conduct a review of an itemization submitted by a physician or medical provider, the employer or insurer shall make available to that individual or entity all documentation submitted together with that itemization by the physician or medical provider. When an individual or entity conducting an itemization review determines that additional information or documentation is necessary to review the itemization, the individual or entity shall contact the claims administrator or insurer to obtain the necessary information or documentation that was submitted by the physician or medical provider
pursuant to subdivision (b).
(2)
(A)
An individual or entity reviewing an itemization of service submitted by a physician or medical provider, including a medical provider network, an entity that provides ancillary services, as defined in Section 4616.5, or an entity providing services for or on behalf of the medical provider network or its providers, shall not alter the procedure codes listed or recommend reduction of the amount of the payment unless the documentation submitted by the
physician or medical provider with the itemization of service has been reviewed by that individual or entity. If the reviewer does not recommend payment for services as itemized by the physician or medical provider, the explanation of review shall provide the physician or medical provider with a specific explanation as to why the reviewer altered the procedure code or changed other parts of the itemization and the specific deficiency in the itemization or documentation that caused the reviewer to conclude that the altered procedure code or amount recommended for payment more accurately represents the service performed.
(B)
The amendments to subparagraph (A) made by the act adding this subparagraph are declaratory of existing law.
(e)
(1)
If the provider
disputes the amount paid, the provider may request a second review within 90 days of service of the explanation of review or an order of the appeals board resolving the threshold issue as stated in the explanation of review pursuant to paragraph (5) of subdivision (a) of Section 4603.3. The request for a second review shall be submitted to the employer on a form prescribed by the administrative director and shall include all of the following:
(A)
The date of the explanation of review and the claim number or other unique identifying number provided on the explanation of review.
(B)
The item and amount in dispute.
(C)
The additional payment requested and the reason therefor.
(D)
The additional information provided in response to a request in the first explanation of review or any other additional information provided in support of the additional payment requested.
(2)
If the only dispute is the amount of payment and the provider does not request a second review within 90 days, the bill shall be deemed satisfied and neither the employer nor the employee shall be liable for any further payment.
(3)
Within 14 days of a request for second review, the employer shall respond with a final written determination on each of the items or amounts in dispute. Payment of any balance not in dispute shall be made within 21 days of receipt of the request for second review. This time limit may be extended by mutual written agreement.
(4)
If the provider contests the amount paid, after receipt of the second review, the provider shall request an independent bill review as provided for in Section 4603.6.
(f)
Except as provided in paragraph (4) of subdivision (e), the appeals board shall have jurisdiction over disputes arising out of this section pursuant to Section 5304.
References
referencesCal. Insurance Code - INS § 11730.
referencesCal. Labor Code - LAB § 4600.
referencesCal. Labor Code - LAB § 6409.
referencesCal. Labor Code - LAB § 4616.2.
referencesCal. Labor Code - LAB § 4603.4.
referencesCal. Labor Code - LAB § 5307.11.
referencesCal. Labor Code - LAB § 5307.1.
referencesCal. Labor Code - LAB § 4603.3.
referencesCal. Labor Code - LAB § 5814.
referencesCal. Labor Code - LAB § 4615.
referencesCal. Labor Code - LAB § 139.21.
referencesCal. Labor Code - LAB § 4650.
referencesCal. Labor Code - LAB § 4616.5.
referencesCal. Labor Code - LAB § 4603.6.
referencesCal. Labor Code - LAB § 5304.
Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026