TRICARE Billing Requirements for Military Health Beneficiaries

TRICARE is the federal health care program administered by the Defense Health Agency (DHA) that covers active-duty service members, National Guard and Reserve members, retirees, and their eligible dependents — a beneficiary population exceeding 9.6 million individuals (Defense Health Agency, 2023 Evaluation Report). Billing under TRICARE operates under a distinct regulatory and procedural framework that differs substantially from commercial insurance and Medicare processes. This page covers the core billing requirements, claim submission mechanics, plan-specific rules, and the decision boundaries providers must navigate to achieve clean claim adjudication.

Definition and scope

TRICARE is authorized under 10 U.S.C. Chapter 55, which governs medical and dental care for members of the uniformed services and their dependents. The program is federally funded and managed by the DHA, with contracts administered through regional managed care support contractors. Unlike medical billing for Medicare or Medicaid, TRICARE does not fall under the Centers for Medicare & Medicaid Services (CMS) jurisdiction — it operates under Department of Defense (DoD) regulations codified primarily at 32 C.F.R. Part 199.

TRICARE covers care delivered through three primary plan structures, each with distinct cost-sharing and network requirements:

• TRICARE Prime — a Health Maintenance Organization (HMO)-style plan that requires enrollment with a Primary Care Manager (PCM) and referrals for specialty care
• TRICARE Select — a Preferred Provider Organization (PPO)-style plan that allows direct access to any TRICARE-authorized provider without referral
• TRICARE for Life (TFL) — a Medicare wraparound benefit available to beneficiaries age 65 or older who have both Medicare Part A and Part B; TRICARE acts as secondary payer in this arrangement

Providers must be either a TRICARE-authorized provider (certified by the DHA) or a network provider contracted with the regional managed care support contractor. The authorization and enrollment process is governed by 32 C.F.R. § 199.6. Provider credentialing and enrollment requirements under TRICARE include National Provider Identifier (NPI) registration — a prerequisite for all claims submission per the HIPAA Administrative Simplification regulations at 45 C.F.R. Part 162.

How it works

TRICARE claims submission follows the standard electronic transaction framework required by HIPAA. Professional claims are submitted on the CMS-1500 form (or its electronic equivalent, the 837P transaction set), while institutional claims use the UB-04 form (837I transaction). Paper claims are permitted but subject to longer processing timelines; the electronic versus paper claims distinction affects both speed and error rate in TRICARE adjudication.

The claims submission process for TRICARE-authorized providers follows this structured sequence:

1. Eligibility verification — Confirm beneficiary eligibility and plan type through the DEERS (Defense Enrollment Eligibility Reporting System) database prior to rendering services
2. Prior authorization — Obtain authorization for applicable procedures, particularly for TRICARE Prime referrals, specialty care, and select high-cost services governed under 32 C.F.R. § 199.4; prior authorization requirements vary by plan type and service category
3. Coding — Assign appropriate ICD-10 diagnosis codes, CPT procedure codes, and HCPCS Level II codes consistent with DHA-recognized coding standards
4. Claim submission — Route claims electronically through a TRICARE-certified clearinghouse or directly to the regional claims processor within the applicable filing deadline
5. Remittance review — Reconcile the Explanation of Benefits (EOB) and Electronic Remittance Advice (ERA) to verify correct payment and identify adjustments
6. Denial management — Address rejected or denied claims through the TRICARE claims appeal process, which includes reconsideration, formal appeal, and hearing levels under 32 C.F.R. § 199.10

Filing deadlines are strict: TRICARE-authorized (non-network) providers must file claims within 1 year of the date of service, while network providers are subject to contractual timelines that may be shorter (DHA TRICARE Manuals, Chapter 5).

Common scenarios

Scenario 1: TRICARE Prime with PCM referral
A beneficiary enrolled in TRICARE Prime receives a referral from their assigned PCM for orthopedic consultation. The network orthopedist bills using the 837P transaction with the referring provider's NPI in Box 17 of the CMS-1500 equivalent. Claims submitted without the referral authorization number are denied as unauthorized services.

Scenario 2: TRICARE Select direct-access visit
A TRICARE Select beneficiary accesses a TRICARE-authorized dermatologist directly without referral. The provider bills as an authorized provider. Cost-sharing applies at the Select cost-share rate rather than the Prime rate, and the patient is responsible for the applicable deductible and 20–25% cost-share for in-network services (32 C.F.R. § 199.4(f)).

Scenario 3: TRICARE for Life coordination
A 68-year-old retiree with Medicare Parts A and B receives inpatient surgery. Medicare adjudicates first. The remaining patient liability is submitted to TRICARE for Life as secondary payer. TFL covers the Medicare cost-sharing in most cases, leaving the beneficiary with $0 out-of-pocket. Proper coordination of benefits sequencing — Medicare primary, TFL secondary — is mandatory; reversed submission results in claim rejection.

Scenario 4: Non-authorized provider billing
A provider not enrolled as TRICARE-authorized renders non-emergency services to a TRICARE beneficiary. Per 32 C.F.R. § 199.6(b), TRICARE will not reimburse claims from non-authorized providers except under specific emergency or overseas care exceptions. The beneficiary may bear full financial responsibility.

Decision boundaries

Three primary classification decisions determine how a TRICARE claim is processed:

Network vs. non-network authorization
Network providers have contracted rates and direct reimbursement agreements. Non-network TRICARE-authorized providers are reimbursed at the TRICARE Maximum Allowable Charge (TMAC), which is set at the same level as the Medicare fee schedule in most categories (DHA TRICARE Reimbursement Manual 6010.61-M, Chapter 1). Providers who accept assignment agree to bill no more than the TMAC; those who do not accept assignment may balance-bill up to 15% above TMAC in some plan types.

Primary vs. secondary payer determination
When a beneficiary carries dual coverage — for example, civilian employer group health insurance alongside TRICARE — the Other Health Insurance (OHI) rule applies. TRICARE is always the secondary payer when OHI exists, except for Medicaid (where TRICARE pays first) and Medicare (where TRICARE for Life pays second). Incorrect primary/secondary ordering is one of the leading causes of TRICARE claim denial, intersecting directly with coordination of benefits rules under 32 C.F.R. § 199.8.

Professional vs. institutional billing
Professional services rendered in an outpatient setting use the CMS-1500/837P pathway. Inpatient hospital services, skilled nursing, and certain outpatient facilities use the UB-04/837I pathway. Place of service codes directly affect whether professional or institutional rules govern reimbursement. For inpatient admissions, TRICARE uses a DRG-based reimbursement methodology comparable to Medicare's Inpatient Prospective Payment System — a distinction covered in depth at DRG billing explained.

HIPAA compliance in medical billing applies fully to TRICARE transactions: the Privacy Rule (45 C.F.R. Parts 160 and 164) governs protected