Texas operates one of the most complex healthcare billing environments in the United States. Between state-specific Medicaid rules administered through TMHP, federal TRICARE requirements that affect San Antonio and surrounding military markets, CMS regulations governing Medicare billing, and commercial payer policies that vary by plan and market, Texas healthcare providers navigate a regulatory and billing landscape that changes every year.

Understanding the laws, rules, and payer requirements that govern medical billing in Texas is not optional. Non-compliance generates denied claims, delayed reimbursements, audit exposure, and in serious cases, exclusion from payer networks or government healthcare programs.

This guide covers the most important Texas medical billing laws, TMHP requirements, and payer-specific rules every Texas provider needs to understand in 2026.

Texas Insurance Code — What It Requires of Payers and Providers

The Texas Insurance Code governs how commercial health insurers operating in Texas must process and pay claims. Several provisions directly affect provider billing operations and revenue cycle management.

Prompt Pay Requirements — Texas Insurance Code Chapter 843 and Chapter 1301

Texas law requires commercial health insurers and HMOs to pay clean electronic claims within 30 days of receipt and clean paper claims within 45 days. If a payer does not pay within these windows, interest accrues on the unpaid balance at 18% per year for HMO claims and at 1.5% per month for PPO claims.

What this means for Texas providers:

•  Identify clean claim submission dates accurately — the prompt pay clock starts from the date the payer receives a clean, complete claim

•  Track payer response times by claim type — systematic late payment by a specific payer may constitute a prompt pay violation that can be reported to the Texas Department of Insurance

•  Submit appeals for underpaid or delayed claims with interest calculations when applicable — Texas prompt pay interest is recoverable through the dispute resolution process

Texas Balance Billing Protections — Senate Bill 1264 (2019) and Federal No Surprises Act (2022)

Texas Senate Bill 1264, enacted in 2019, established protections against surprise medical bills for patients receiving care from out-of-network providers at in-network facilities. The federal No Surprises Act extended similar protections at the national level effective January 2022.

Key requirements affecting Texas provider billing:

•  Out-of-network providers at in-network facilities may not bill patients more than their in-network cost-sharing amount for emergency services and certain non-emergency services without prior written consent

•  Good faith cost estimates must be provided to uninsured and self-pay patients under the federal price transparency requirements

•  Independent dispute resolution (IDR) is available for out-of-network payment disputes between providers and payers — replacing direct balance billing to patients in covered situations

Texas Telehealth Parity Law

Texas law requires commercial health benefit plans to cover telehealth services on the same basis as in-person services for the same covered benefits. Payers cannot impose more restrictive coverage limitations, prior authorization requirements, or cost-sharing requirements on telehealth services than on equivalent in-person services — a requirement that affects billing for the growing number of Texas providers operating hybrid in-person and virtual care models.

TMHP — Texas Medicaid Billing Requirements for 2026

Texas Medicaid Healthcare Partnership (TMHP) administers Texas Medicaid billing for the state's more than 5 million Medicaid enrollees. For providers in Houston, San Antonio, Dallas, Austin, El Paso, and across rural Texas, TMHP billing represents a significant and complex share of daily billing operations.

NPI as the Only Accepted Texas Medicaid Identifier

Effective September 1, 2021, the NPI (National Provider Identifier) became the only accepted provider identifier for Texas Medicaid claims. Texas Provider Identifier (TPI) numbers are no longer issued or accepted. All Texas Medicaid billing must use the provider's Type 1 NPI (individual) or Type 2 NPI (group/organization) registered in NPPES with the correct taxonomy code.

NPI taxonomy mismatches between NPPES and TMHP records generate claim denials that appear months after credentialing appears complete — making NPI accuracy verification a critical step in both initial credentialing and ongoing billing operations.

TMHP Managed Care Program Structure

Texas Medicaid operates through multiple managed care programs, each with its own billing rules:

•  TMHP Fee-for-Service — direct billing to TMHP for patients not enrolled in managed care. Claims submit through the TMHP portal or clearinghouse EDI.

•  STAR — managed care for children and families, administered by Molina Healthcare, Superior HealthPlan, Aetna Better Health, UnitedHealthcare Community Plan, and others. Claims submit to the specific managed care organization — not to TMHP directly.

•  STAR+PLUS — managed care for adults with disabilities and dual-eligible (Medicare + Medicaid) patients. Billing requires correct coordination of benefits and accurate MCO routing.

•  STAR Kids — managed care for children with complex medical needs. Separate authorization framework and service coordination requirements.

•  CHIP — Children's Health Insurance Program for children in families above the Medicaid income threshold. Administered through managed care organizations with separate enrollment and billing processes.

PEMS Enrollment — Required Before Billing Texas Medicaid

Providers must complete enrollment through TMHP's Provider Enrollment and Management System (PEMS) before submitting any Texas Medicaid claims. PEMS enrollment is a required separate step from CAQH completion or commercial payer credentialing. Submitting Texas Medicaid claims without completed PEMS enrollment results in automatic denial.

TMHP Prior Authorization Requirements

Texas Medicaid managed care organizations maintain their own prior authorization requirements independently of TMHP fee-for-service rules. Authorization requirements change without consistent provider notification. For high-volume services — behavioral health, home health, DME, specialty referrals — confirming current authorization requirements with the specific managed care plan before rendering services is the only reliable prevention strategy.

Medicare Billing Rules for Texas Providers — 2026 Key Requirements

Medicare remains the primary payer for patients over 65 across Texas, and CMS billing rules apply uniformly statewide — with Texas-specific Local Coverage Determinations (LCDs) issued by the Novitas Solutions MAC (Medicare Administrative Contractor) for the Texas jurisdiction.

Timely Filing Requirements

Medicare requires claim submission within 12 months (one calendar year) of the date of service. This is one of the longest timely filing windows among major payers, but claims submitted after 12 months are denied and the denial is not subject to successful appeal regardless of circumstances. For Texas practices with billing backlogs or staff turnover disruptions, Medicare timely filing denials represent pure, unrecoverable revenue loss.

Local Coverage Determinations — Texas Novitas Jurisdiction

Novitas Solutions issues LCDs that define coverage criteria for specific services billed to Medicare in Texas. LCDs specify which diagnosis codes support medical necessity for covered procedures in the Texas jurisdiction. Claims submitted with diagnosis codes that don't satisfy the applicable LCD criteria are denied on medical necessity grounds — a denial that requires either a corrected claim with supporting diagnosis documentation or an appeal with attached medical records.

Key Texas Novitas LCDs affecting common billing scenarios:

•  LCD for chronic pain management — specific diagnosis code requirements for injection therapies

•  LCD for sleep testing — required diagnostic criteria documentation for polysomnography

•  LCD for wound care — wound measurement documentation and treatment progression requirements

•  LCD for physical and occupational therapy — functional limitation reporting and medical necessity documentation standards

Commercial Payer Requirements — Texas-Specific Rules

BCBS of Texas

BCBS Texas requires group credentialing submissions on roster template version 25.11.22 or newer as of February 2026. Applications submitted on older templates are automatically rejected. BCBS Texas CAQH attestation must be finalized within 45 days of application initiation — failure to attest within this window results in application termination and full restart.

BCBS Texas bundling edits are among the most aggressive in the Texas commercial market. Multi-procedure encounters require correct modifier 59 or X-modifier application to establish separate and distinct procedures. Missing modifiers on BCBS Texas multi-procedure claims result in bundled payments that reduce reimbursement below the contracted rate.

UnitedHealthcare Texas

UHC has implemented mandatory electronic prior authorization through its ePA platform for imaging, surgical procedures, and specialty medications. Phone authorization and fax authorization are not accepted as substitutes. Authorization numbers must be attached to the claim at submission — verbal approval references do not satisfy UHC's documentation requirement.

Community First Health Plans — San Antonio Market

Community First Health Plans operates as a Bexar County-based plan with authorization requirements and network rules specific to the San Antonio market. Providers billing Community First must be enrolled in the plan's specific network — commercial network enrollment with UHC or Aetna does not extend to Community First participation.

Texas Balance Billing and Patient Rights — Provider Billing Obligations

Texas providers have specific obligations regarding patient billing transparency and balance billing protections:

•  Good faith estimates must be provided to uninsured and self-pay patients before scheduled services under the federal No Surprises Act

•  Surprise billing protections prohibit balance billing patients for covered out-of-network services at in-network facilities without prior written consent

•  Explanation of benefits — patients have the right to request an itemized statement of all charges billed to their insurance

•  Charity care and financial assistance — Texas nonprofit hospital systems are required to maintain financial assistance policies and screen patients for eligibility before pursuing collections

Frequently Asked Questions

What are the prompt pay requirements for Texas commercial payers?

Texas Insurance Code requires commercial health insurers to pay clean electronic claims within 30 days and clean paper claims within 45 days. Delayed payment beyond these windows accrues interest at 18% per year for HMO claims and 1.5% per month for PPO claims under Texas law.

What is TMHP and what does it require for Texas providers?

TMHP (Texas Medicaid Healthcare Partnership) administers Texas Medicaid billing. Providers must complete PEMS enrollment before billing Texas Medicaid. Claims must use the NPI as the sole provider identifier. TMHP operates through multiple managed care programs — STAR, STAR+PLUS, STAR Kids, and CHIP — each with separate billing rules and managed care organization routing requirements.

Does Texas have surprise billing protections?

Yes. Texas Senate Bill 1264 (2019) and the federal No Surprises Act (2022) together prohibit out-of-network providers at in-network facilities from billing patients more than their in-network cost-sharing amount for emergency and certain non-emergency services without prior written consent. Independent dispute resolution is available for payment disputes between providers and payers.

What is the Medicare timely filing deadline for Texas providers?

Medicare requires claim submission within 12 months (one calendar year) of the date of service. Claims submitted after this window are denied and cannot be successfully appealed regardless of the reason for the delay.

Which Medicare Administrative Contractor covers Texas?

Novitas Solutions is the Medicare Administrative Contractor (MAC) for the Texas jurisdiction. Novitas issues Local Coverage Determinations (LCDs) that define medical necessity criteria for specific services billed to Medicare in Texas. Providers must align claim documentation with applicable Novitas LCDs to avoid medical necessity denials.

 

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