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Medical billing by state

Medical Billing Services in Colorado

Colorado renamed its Medicaid program Health First Colorado and runs it through a structure most states don't have: members are attributed to regional RAEs (Regional Accountable Entities) under the Accountable Care Collaborative, which coordinate care and manage networks while claims still flow through the state's fee-for-service system — a hybrid that confuses billers trained on pure MCO states. Providers get a generous 365 days to file, Kaiser Permanente holds an unusually deep Front Range membership for a non-coastal state, and Colorado's clean-claims law puts a 30-day electronic / 45-day paper clock on carriers with penalties for late payment.

Colorado billing at a glance
365 days
Health First Colorado filing window from date of service
RAEs
Regional Accountable Entities coordinate care under the ACC — claims stay FFS
30 / 45 days
Colorado clean-claims deadline (electronic / paper)
Kaiser
Among the deepest Kaiser markets outside the West Coast
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Health First Colorado: filing rules that decide whether you get paid

Administered by the Dept. of Health Care Policy & Financing (HCPF)

Health First Colorado claims carry a 365-day window from the date of service, filed through the state's interChange provider portal (Gainwell), which also handles enrollment and revalidation. Under the Accountable Care Collaborative, members are attributed to regional RAEs that manage primary care networks, behavioral health and care coordination — but physical-health claims still adjudicate through the state system rather than plan-specific processors, so Colorado bills more like a coordinated FFS program than an MCO state. Behavioral health routes through the RAEs' networks, which is where out-of-region and attribution denials concentrate.

Deadlines for every major payer — including Colorado Medicaid — live in our timely filing limits tool, with an interactive deadline checker.

The payers we bill every day in Colorado

Anthem BCBS of Colorado (Elevance)
The state Blue with the largest commercial book.
Kaiser Permanente Colorado
Deep integrated membership along the Front Range — Denver to Boulder to Colorado Springs.
UnitedHealthcare / Cigna / Aetna
Employer coverage across the Denver corporate market.
Rocky Mountain Health Plans
The Western Slope's regional plan, now under UnitedHealthcare, with its own Medicaid role in western counties.
Denver Health Medical Plan
The safety-net system's own plan with concentrated Denver enrollment.

Colorado billing rules that move real money

Colorado clean claims (§10-16-106.5)

Colorado requires carriers to pay, deny or settle clean claims within 30 days electronically and 45 days on paper, with statutory penalties on late payment that escalate for persistent delay. The Division of Insurance takes provider complaints, and Colorado's penalty structure compounds — chronic slow-payers accumulate real liability here.

RAE attribution and behavioral health

Colorado routes Medicaid behavioral health through the RAEs' regional networks while physical health stays state-adjudicated — so a member's RAE attribution decides where BH claims go and which network rules apply. Attribution mismatches, not coding, drive most Colorado BH denials we see.

Where we work in Colorado

We support practices across the state remotely — same-day claim submission and a dedicated team regardless of your zip code. The markets we serve most:

Denver
The Front Range's anchor — UCHealth, HealthONE and Denver Health with strong commercial and Kaiser mix.
Colorado Springs
Military and TRICARE presence from the Academy and Fort Carson alongside a growing practice market.
Boulder & the northern Front Range
High-benefit tech and university employer coverage.
Fort Collins & Greeley
UCHealth north and Banner territory in fast-growing Larimer and Weld counties.
Grand Junction & the Western Slope
Rocky Mountain Health Plans country — a different payer map than the Front Range.

Credentialing & enrollment in Colorado

Physician licensing in Colorado runs through the Colorado Medical Board, and payer enrollment is its own workstream on top of it — state Medicaid enrollment, CAQH upkeep, and individual plan contracting each on their own timeline. Our credentialing service manages the full stack for Colorado providers, and our credentialing calculator estimates realistic timelines by payer.

Colorado billing FAQs

What is the timely filing limit for Health First Colorado?

365 days from the date of service — one of the most generous windows in the country. Claims file through the state's interChange portal, and the window applies to the state-adjudicated system that covers most physical-health services.

What are RAEs and do they change where I send claims?

Regional Accountable Entities coordinate care and manage networks under the ACC, but most physical-health claims still adjudicate through Health First Colorado's state system. Behavioral health is the exception — it routes through the member's RAE, so attribution determines the network and rules.

How fast must Colorado insurers pay claims?

Clean claims are due in 30 days electronic / 45 days paper under §10-16-106.5, with escalating penalties for late payment. We benchmark carriers against the statute and escalate persistent offenders to the DOI.

Do you handle TRICARE billing in Colorado Springs?

Yes — the Academy, Fort Carson and Peterson make TRICARE a core payer in El Paso County, with regional-contractor rules and referral requirements that differ from commercial plans.

Medical billing services in other states

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Ready to stop losing revenue in Colorado?

Get a free billing audit — we'll review your denials, aging and payer mix against Colorado-specific benchmarks and show you exactly where the money is leaking.

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