State · CO
Medical billing services in Colorado
Short answer
Medical billing services in Colorado face a Medicaid program that pays most physical health claims fee-for-service: about 90 percent of Health First Colorado members sit in the Accountable Care Collaborative, but under 1 percent are in a capitated plan, so claims go to the Gainwell-run Provider Web Portal while a Regional Accountable Entity in each of four regions holds the behavioral health capitation.
Personal care claims pay only when a verified EVV record matches them in the MMIS, non-emergent rides move to MediDrive statewide on January 1, 2027, and RMHP Prime takes standard claims within 120 days. A Remitwright dedicated biller works those rules, serving Colorado practices remotely. Rules for other states are on the medical billing services by state page.
Last reviewed by the Remitwright billing team. Editorial policy
Billing in Colorado: what's different
The rules below change how a claim is filed and paid in Colorado. Each line links to the official page it was read from, and the date at the top of this page is when it was last checked.
| Fact | In Colorado | Source |
|---|---|---|
| Medicaid program | Health First Colorado (Colorado's Medicaid program)Colorado Department of Health Care Policy & Financing (HCPF) | 1 |
| Fee-for-service portal | Provider Web Portal (Gainwell Technologies) | 1 |
| Managed care plans | 5 plansRocky Mountain Health Plans, Northeast Health Partners, Colorado Access, Denver Health Medicaid Choice, Colorado Community Health Alliance | 5 |
| Medicaid timely filing (RMHP Prime and RAE claims) | 120 days from the date of service | 6 |
| EVV | Open vendor model | 8 |
Health First Colorado (Colorado's Medicaid program)
Health First Colorado (Colorado's Medicaid program) is run by the Colorado Department of Health Care Policy & Financing (HCPF). Fee-for-service claims and provider enrollment go through the Provider Web Portal (Gainwell Technologies)1, at colorado-hcp-portal.coxix.gainwelltechnologies.com. About 90 percent of Colorado Medicaid enrollees (1,079,583 of 1,197,490 in 2024) were in some form of managed care, almost all of it the Accountable Care Collaborative, while 4,376 members (0.4 percent) were in a full-benefit capitated plan4. CMS managed care enrollment data for 2024. Since July 1, 2025 the ACC has run under waiver CO-0004.R01.02: one Regional Accountable Entity in each of four regions administers the PCCM entity and behavioral health PIHP program, and two physical health plans, RMHP Prime in region 1 and Denver Health in region 4, operate as the ACC: MCO. The plan names below come from CMS's 2024 report, the Phase III regions from the RAEs' own pages.
Medicaid timely filing (RMHP Prime and RAE claims): 120 days from the date of service for standard RMHP Prime claims unless the provider agreement says otherwise; 365 days for non-participating providers; after a third-party primary payment or denial, 60 days from that payment or denial or 365 days from the date of service, whichever occurs first; secondary claims 120 days from the printed date on the primary payer's voucher6. Backdated eligibility gives 120 days from the date the member is added to the eligibility system, with a letter from the county Department of Human Services or the Single Entry Point attached. When Medicare is primary, the secondary claim to RMHP is due within one year of the EOMB date, and RMHP Prime claims for Medicare-denied, non-covered or exhausted benefits are not crossover claims: they are due within 120 days of the date of service or 60 days after the Medicare denial. HCPF sets the fee-for-service deadline in its General Provider Information manual, and each RAE and MCO sets its own window in the provider agreement.
Managed care plans5
- Rocky Mountain Health PlansRAE for Region 1 and the ACC MCO (RMHP Prime) in western Colorado counties
- Northeast Health PartnersRAE for Region 2, administered by RMHP; covers Elbert County from Phase III
- Colorado AccessRAE for Region 4: Adams, Arapahoe, Denver and Douglas counties
- Denver Health Medicaid ChoiceACC MCO in Region 4, run by Denver Health and Hospital Authority
- Colorado Community Health AllianceRAE in CMS's 2024 enrollment report (regions 6 and 7 under the seven-region map)
Each plan is credentialed separately, has its own portal and its own appeal route. A practice that joins Colorado Medicaid through one plan is not in network with the others until each contract is in place.
Commercial payers and the prompt-pay law
Commercial payers active in Colorado11: Anthem, Cigna, Denver Health, Kaiser Permanente, Rocky Mountain Health Plans, Select Health. No two of them share a provider manual: filing windows, corrected-claim processes and appeal levels are set payer by payer, and the timely filing limits table lists verified deadlines, each with its source.
Prompt pay in Colorado is governed by Colorado Division of Insurance Regulation 4-2-24, clean claim requirements for health carriers6. The regulation governs what a carrier may ask for before a claim counts as clean. RMHP's 2026 manual applies it this way: a clean claim must include every field the carrier needs to determine liability and resolve the claim, the Division makes the final determination in a dispute over which fields are essential, and a carrier may request additional information consistent with the regulation. Provider appeals follow Regulation 4-2-23 and begin with a written request. The payment deadlines themselves sit in the Colorado prompt payment statute. In A/R follow-up, a clean claim that sits unpaid is escalated with the statute cited.
NEMT and home care in Colorado
Non-emergency medical transportation. MediDrive, the state's transportation broker, already coordinates Health First Colorado rides in the nine-county Denver metro area and expands to the rest of Colorado on January 1, 2027; members elsewhere keep their current local transportation service through November 30, 2026 and can schedule MediDrive trips from December 1, 2026 for appointments on or after January 1, 20272. Mileage reimbursement and out-of-state travel need prior approval through MediDrive. The Provider Web Portal carries the same notice: beginning January 1, 2027, all NEMT trips must be scheduled through MediDrive. The NEMT billing in Colorado page covers trip documentation, broker claims and reconciliation.
Electronic visit verification. Open vendor model: HCPF offers a free state EVV system through a contracted vendor, providers may use their own EVV system if it meets technical and program requirements, and every visit record is aggregated and validated by the state's EVV Aggregator and sent to the MMIS, which matches it to the claim during adjudication; a claim without the necessary EVV record is denied8. HHS OIG report A-07-24-03260 (July 2026), which audited state fiscal year 2024 personal care claims and found visits recorded without a location or outside the system. Colorado's Cures Act deadline for personal care EVV moved to January 1, 2021 under a good faith effort exemption; CMS lists the state compliant for personal care from that date and for home health from January 1, 2023. See home care billing in Colorado for waiver programs, EVV exceptions and authorizations.
Rules that change how Colorado claims are billed
ACC Phase III brought four RAE regions and a 90-day MCO opt-out3
The waiver amendment effective July 1, 2025 through September 30, 2028 awards one Regional Accountable Entity in each of four regions to run the PCCM entity and behavioral health PIHP program, with two provider networks per region: primary care medical providers and specialty behavioral health. Members already in Denver Health or RMHP Prime were enrolled in the ACC MCO automatically for the July 1, 2025 start, new members are auto-enrolled when the plan drops below its contracted enrollment, and anyone enrolled has 90 days to opt out and choose a PCMP, whose region decides the RAE. M-CHIP children keep fee-for-service physical health with capitated behavioral health through the RAE.
A personal care claim without a matching EVV record is denied in the MMIS8
Colorado does not bill through the EVV system. Providers submit claims through the Health First Colorado web portal, the EVV Aggregator validates visit records from the state system and provider choice systems, and the MMIS matches verified visits to claims by provider ID, member ID, service type and date of service during adjudication. The OIG's July 2026 audit of state fiscal year 2024 found visits with no service location, manual entries without a reason note, and claims that did not comply, and recommended system edits and closer provider monitoring, so the visit record is checked before the claim leaves.
RMHP Prime claims have a 120-day window and a 60-day third-party rule6
Rocky Mountain Health Plans, the RAE for Region 1 and the ACC MCO for western Colorado, sets standard RMHP Prime claims at 120 days from the date of service unless the provider agreement says otherwise and gives non-participating providers 365 days. Its RMHP Prime schedule adds a coordination deadline: after a third-party primary payment or denial, the claim is due 60 days from that payment or denial or within 365 days of the date of service, whichever occurs first. The claims chapter adds two more. Secondary claims are due 120 days from the printed date on the primary payer's voucher, or one year from the EOMB date when Medicare is primary, and RMHP Prime claims for Medicare-denied, non-covered or exhausted benefits are not crossover claims: they must arrive within 120 days of the date of service or 60 days after the Medicare denial. Backdated eligibility restarts the 120 days from the date the member is added, with the county letter attached. RMHP does not issue ID cards to RAE members; the state card and the Colorado interChange eligibility check cover them.
NEMT moves to one statewide broker on January 1, 20272
MediDrive already coordinates non-emergent medical transportation in the nine-county Denver metro area. From December 1, 2026 members anywhere in Colorado can schedule MediDrive rides for appointments on or after January 1, 2027, through the app, the website, the phone line or chat, while local transportation services keep running through November 30, 2026. Mileage reimbursement and out-of-state travel need prior approval through MediDrive, and the provider portal repeats that all NEMT trips must be scheduled through MediDrive from January 1, 2027.
Clean claim disputes go to the Division of Insurance, appeals start in writing6
Under Division of Insurance Regulation 4-2-24, as RMHP's manual describes it, a clean claim is one on the right form with every field needed to determine liability and resolve the claim, the Division decides which fields are essential if the carrier and the provider disagree, and the carrier may request more information consistent with the regulation. Regulation 4-2-23 requires a care provider appeal to begin with a written request carrying the dates of service, member and provider identifiers, the dollar amount in dispute and a statement of the dispute, which is why the biller files appeals through the claims tool with the records attached.
Services for Colorado practices
Remitwright serves Colorado practices remotely, inside the practice management or EHR system the practice already uses. A dedicated biller works the account; nothing is pooled. Each service below explains what that biller does.
- Medical billingClaims worked by one named biller
- CredentialingEnrollment, CAQH and PECOS kept current
- Eligibility verificationCoverage and benefits checked before visits
- Prior authorizationAuths requested, tracked, attached to claims
- Denial managementEvery denial read, worked and appealed
- A/R follow-upUnpaid claims chased before filing limits
FAQ
Questions from Colorado practices
What is the Medicaid timely filing limit in Colorado?
Which plans and RAEs run Medicaid managed care in Colorado?
Which prompt pay rule applies to Colorado commercial claims?
How does EVV affect our Colorado personal care claims?
Who schedules Medicaid rides in Colorado now that MediDrive is the broker?
Where do Colorado Medicaid claims and enrollment go?
Which commercial payers did you list for Colorado, and why those?
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