Aetna Behavioral Health Appeals in Colorado
Appealing an Aetna behavioral health denial in Colorado means tracking two separate clocks: Aetna's own 30-day Level-1 appeal window, and Colorado's 30-day prompt-payment statute (C.R.S. § 10-16-106.5) for clean-claim payment. This guide covers both, plus Aetna's filing address and Colorado's parity protections.
Where to file your Aetna appeal
P.O. Box 14463
Lexington, KY 40512
30 calendar days
60 days from Level-1 denial
1-860-754-2985
Colorado's prompt-payment window
In Colorado, state-regulated (fully-insured) plans — including many Aetna plans — generally must pay or formally respond to a clean claim within 30 calendar days under C.R.S. § 10-16-106.5. This deadline does not bind self-funded ERISA plans. This is a claim-payment deadline, not the appeal-decision deadline. If Aetna missed this window on your claim, cite it as a separate payment violation alongside your Aetna appeal — not as the deadline for the appeal decision itself.
30 days EFT / 45 days paper. CO SB 167 (2019) added NQTL parity requirements exceeding federal MHPAEA; invoke explicitly when filing BH appeals.
MHPAEA parity for Aetna in Colorado
Colorado adds state-level parity protection
Colorado SB 167 (2019) added explicit NQTL parity requirements to state insurance law, requiring health plans to document that NQTLs for mental health benefits are no more restrictive than those for medical/surgical benefits. The Colorado Division of Insurance can require plans to produce comparative analyses and take enforcement action independently of federal MHPAEA enforcement.
Statute: C.R.S. § 10-16-104(5.5) (verify current section); CO SB 167 (2019) (confirm the current section before citing)
Aetna's parity posture: Aetna publishes MHPAEA comparative analyses on request; behavioral health benefits are administered through Aetna Behavioral Health. Document parity violation in detail — Aetna's internal process requires a specific MHPAEA flag in the appeal routing system.
When appealing an Aetna denial in Colorado on a state-regulated, fully-insured plan, cite both federal MHPAEA (29 CFR § 2590.712) and C.R.S. § 10-16-104(5.5) (verify current section); CO SB 167 (2019) (confirm the current section before citing) together — the state statute remains in force regardless of the 2025 federal non-enforcement of the 2024 MHPAEA Final Rule. Self-funded ERISA plans are preempted from state insurance law, so rely on federal MHPAEA alone there.
Common Aetna denial codes
Colorado's insurance commissioner
If your internal Aetna appeal is denied, Colorado's Department of Insurance can help with a complaint or external review for fully-insured plans. Look up the official contact via the NAIC consumer locator.
Note: self-funded ERISA plans are generally exempt from state insurance regulation. If your patient's Aetna plan is employer-sponsored and self-funded, your remedies run through the U.S. Department of Labor (EBSA) rather than Colorado's commissioner.
Generate your Aetna appeal letter
AppealWin generates a complete, editable appeal letter with the correct regulatory citations for Colorado and Aetna in minutes. Therapists get 5 free letters every month; a one-time $19 patient letter is also available.
Generate my appeal letter →Frequently asked questions
How long does Aetna have to respond to an appeal in Colorado?
Aetna generally has 30 calendar days to respond to a Level-1 appeal. If denied, you have 60 days to request external review. Separately, Colorado's prompt-payment statute gives payers 30 days to respond to a clean claim (C.R.S. § 10-16-106.5) — a different deadline governing claim payment, not the appeal decision.
Does MHPAEA apply to Aetna in Colorado?
Generally, yes — for Aetna's group health plans. Federal MHPAEA applies to Aetna's group health plans in Colorado. C.R.S. § 10-16-104(5.5) (verify current section); CO SB 167 (2019) (confirm the current section before citing) additionally applies for state-regulated, fully-insured plans — self-funded ERISA plans are preempted from state insurance law and rely on federal MHPAEA alone; where it applies, Colorado's state law remains in force regardless of the 2025 federal non-enforcement announcement.
Where do I mail or fax a Aetna appeal?
Mail to Aetna Appeals Department, P.O. Box 14463, Lexington, KY 40512. You can also fax to 1-860-754-2985. This address is the same nationally, including for Colorado providers.