Georgia Billing Reference

Medical Billing in Georgia: Payer Landscape, Medicaid & Timely Filing

Georgia’s Medicaid (Georgia Families) runs through CMOs including Amerigroup, CareSource, Peach State Health, and WellCare. Timely filing is 365 days for most commercial payers, giving billing teams more runway than neighboring states. Behavioral health prior auth requirements are strict and inconsistently enforced across CMOs.

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Medical Billing in Georgia: The Short Version

Georgia Medicaid routes most members through the Georgia Families program's three care management organizations (CMOs), each with separate portals, prior-auth lists, and filing rules. Anthem Blue Cross Blue Shield of Georgia anchors the commercial market, with Ambetter carrying a large marketplace share. Atlanta's rapid growth is pulling national payers into more aggressive network and MA competition.

Payer Landscape

Major Payers in Georgia

Payer	Type	What Billing Teams Should Know
Anthem BCBS of Georgia	Commercial / Blue plan	Dominant commercial payer statewide
UnitedHealthcare	Commercial / MA	Large Atlanta employer book
Ambetter (Peach State/Centene)	ACA Marketplace	Among the largest GA marketplace carriers; separate from Peach State Medicaid
Aetna	Commercial / MA	Growing MA presence in Atlanta metro
Humana	Medicare Advantage	Significant MA share, strict filing
Kaiser Permanente Georgia	Integrated HMO	Atlanta closed-network HMO
Georgia Medicaid (DCH)	Medicaid	CMO assignment controls billing route; FFS window 6 months

Medicaid Structure

Georgia Medicaid (Georgia Families): Managed Care Plans

Administered by the Georgia Department of Community Health (DCH). The patient's plan assignment — not just Medicaid eligibility — determines the portal, prior-auth list, and filing rules that apply.

Plan	Notes
Peach State Health Plan (Centene)	Largest Georgia Families CMO
Amerigroup Georgia (Elevance)	Statewide CMO presence
CareSource Georgia	Newest of the three CMOs; distinct portal and PA workflows

Filing Deadlines

Timely Filing Limits for Georgia Claims

Initial-claim windows for the payers Georgia practices bill most. Commercial limits are contract-specific — always confirm against your provider agreement and the payer's current manual.

Payer	Timely Filing Limit	Notes
Georgia Medicaid	6 months from date of service	CMOs commonly apply 180 days; verify each plan contract
Medicare (original)	12 months from date of service	Set by federal law; no contract variation
UnitedHealthcare (commercial)	90 days from date of service	Contract-specific; some plans allow 180
Aetna (commercial)	120 days from date of service	Contract-specific; verify provider agreement
Cigna (commercial)	90 days from date of service	Contract-specific; verify provider agreement
Humana (commercial)	90 days from date of service	Among the strictest; Medicare Advantage differs

Verified against payer publications at time of writing (July 2026). Filing limits change by contract and plan year — treat this table as a starting point, not a substitute for the payer manual. See our methodology.

GA-Specific Rules

Georgia Billing Realities to Know

Three-CMO Structure

A Georgia Medicaid patient belongs to one of three CMOs — Peach State, Amerigroup, or CareSource. Eligibility checks must capture the CMO, because claims sent to the wrong plan waste the filing window.

Ambetter vs Peach State

Centene operates both Peach State (Medicaid) and Ambetter (marketplace) in Georgia. Same parent, different products, different rules — conflating them causes authorization and filing errors.

Rural Hospital Squeeze

Rural Georgia practices deal with narrow networks and long payer distances; out-of-network exposure is a bigger revenue factor than in metro Atlanta.

Atlanta MA Competition

Medicare Advantage competition in metro Atlanta is intensifying — plan-by-plan PA lists change yearly at AEP, and January claim denials spike when practices miss plan changes.

Frequently Asked Questions

Georgia Medicaid (Georgia Families) allows 6 months from date of service for initial claims, administered by the Georgia Department of Community Health (DCH). Managed care plans operating in Georgia may apply shorter contractual windows, so always verify each plan's provider manual.

Peach State Health Plan (Centene), Amerigroup Georgia (Elevance), CareSource Georgia. Each plan maintains its own provider portal, prior authorization list, and claim submission rules — the patient's plan assignment, not just Medicaid status, determines how a claim must be billed.

Anthem BCBS of Georgia, UnitedHealthcare, Ambetter (Peach State/Centene), Aetna, Humana, alongside Medicare and Georgia Medicaid (Georgia Families). See the payer landscape table on this page for what billing teams should know about each.

GAMMIS (Georgia Medicaid Management Information System) is the claims processing platform for Georgia Medicaid. All claims must be submitted through GAMMIS-compatible EDI channels or the web portal. Billing errors specific to Georgia frequently trace to GAMMIS payer ID mismatches, prior authorization numbers not linked at the claim level, or taxonomy codes not matching the provider enrollment record.

Code Reference

Common Codes Billed in This State

Frequently billed codes in this state’s payer environment, with notes on state-specific rules and common denial patterns.

Code	Description	State-Specific Note
99213	Office visit, est. patient — level 3	Georgia Families CMO determines coverage; verify enrollment
99214	Office visit, est. patient — level 4	High volume under Amerigroup and WellCare Georgia Families
H0031	Mental health assessment — by non-physician	High demand in GA; verify CMO behavioral health carve-out
Mod. GT	Telehealth — real-time audio/video	Georgia Medicaid allows; commercial auth requirements vary
G0463	Hospital outpatient clinic visit	FQHCs are significant providers in rural Georgia
CO-16	Claim lacks required information	Common under Peach State and CareSource; verify NPI + taxonomy

Codes and reimbursement rates change annually. Verify current fee schedules with each payer before billing. Full code lookup →