For California health-insurance denials
State · California · appeal letter

How to appeal a denied claim in California.

California is the largest insured state, and the appeal-rights framework here is the strongest in the country — the Department of Managed Health Care (DMHC) complaint pathway, Cal. Health & Safety Code § 1368, the Knox-Keene Act for licensed HMOs and most PPOs operating in California, and Cal. Ins. Code § 10169 for fully-insured adverse determinations. A California ADVERSE BENEFIT DETERMINATION cites the same EOB reason codes a denied claim in any other state would carry — “medical necessity not established,” “not a covered benefit,” “precertification not obtained,” “step-therapy criteria not satisfied,” “out-of-network provider” — but the appeal frameworks that attach are California-specific, the agencies that intervene are the DMHC Help Center (1-888-466-2219, www.dmhc.ca.gov) and the California Department of Insurance (CDI), and the timelines are 60-day internal / 180-day external review. Self-funded employer plans under the federal ERISA § 503 procedure at 29 C.F.R. § 2560.503-1 still apply, with CA UR laws constraining the procedural aspects the federal rule does not preempt.

Submit a California denial →See how it works

01 · What this segment looks like

A California health-insurance denial — and the appeal frameworks that apply to it.

The California denial segment captures a specific configuration: the member holds a fully-insured plan issued in California, or a Knox-Keene licensee HMO/PPO plan (Health Net, Blue Shield of California, Aetna, Cigna, Kaiser Permanente CA products, Anthem Blue Cross), and has received an Adverse Benefit Determination on the EOB. The denial reason will track the carrier’s internal reason code (medical necessity, prior authorization, step therapy, formulary exclusion, out-of-network), but the appeal frameworks that attach are California-specific. The Department of Managed Health Care (DMHC) regulates Knox-Keene licensees under the Knox-Keene Health Care Service Plan Act of 1975 (Cal. Health & Safety Code § 1340 et seq.), and fully-insured PPO/EPO disputes fall under Cal. Ins. Code § 10169 — sections 10169 through 10169.15 spell out the carrier’s adverse-determination notice requirements, the internal-appeal window, and the Independent Medical Review (IMR) channel through the DMHC.

Knox-Keene Act licensees — the enrollee-facing HMOs and most PPOs operating in California — are subject to the DMHC’s Health & Safety Code § 1368 framework, which layers on top of any federal regime: a 60-day internal-appeal window after the ABD, a 180-day Independent Medical Review (IMR) deadline from the final internal denial, and the DMHC Help Center’s intervention channel (1-888-466-2219, online complaint form at www.dmhc.ca.gov). The California Department of Insurance (CDI) handles fully-insured PPO/EPO plans through Cal. Ins. Code § 10169 (notice requirements) and § 10169.2 (Independent Medical Review). Both IMR pathways are binding on the carrier, and the 7-day expedited IMR under § 1370.4(a) for ongoing care is the parallel to the federal 72-hour urgent-claim framing.

Self-funded ERISA plans — typically larger employer group plans where the employer pays the claims rather than buying insurance from a carrier — fall outside Knox-Keene and outside CDI, and run through the federal ERISA § 503 claims-procedure rule at 29 C.F.R. § 2560.503-1. CA UR laws (Cal. Health & Safety Code § 1363.5; Cal. Code Regs. tit. 28 § 1300.70) still apply to procedural aspects the federal rule does not preempt — clinical-criteria disclosure, peer-reviewer escalation, language-access requirements — but the appeals timeline and the right-to-file-a-civil-action follow fully from 29 C.F.R. § 2560.503-1 and ERISA § 502(a). A well-built California appeal letter cites both: the controlling CA statute (DMHC for Knox-Keene licensee plans, CDI for fully-insured PPO/EPO disputes, or the federal preemption fallback for self-funded ERISA), and the right federal framework underneath.

01 · CA-specific timelines

01

60-day internal-appeal window

After an Adverse Benefit Determination on a Knox-Keene licensee plan, the enrollee has 60 days from receipt of the ABD notice to file a first-stage internal appeal with the carrier — Cal. Health & Safety Code § 1368.01(a)(1). The carrier has 30 days to issue a decision for standard appeals, and 7 days for expedited under § 1368.01(b)(2) where ongoing care is at stake. For CDI-regulated fully-insured PPO/EPO plans, Cal. Ins. Code § 10169.2(c) supplies the analogous 60-day window. Self-funded ERISA plans run on the federal rule at 29 C.F.R. § 2560.503-1(h)(3)(i) — typically 180 days from receipt of the ABD.

02

180-day external review (IMR) window

After exhausting the carrier’s internal appeal, the enrollee has 180 days from the final internal denial to file an Independent Medical Review (IMR) request with the DMHC Help Center — or, for CDI-regulated PPO/EPO, with the CDI directly. IMR is binding on the carrier: when the IMR physician reviewer overturns the denial, the carrier must comply within 3 business days. The DMHC Help Center is the front door — phone 1-888-466-2219, online complaint at www.dmhc.ca.gov — and the typical complaint-to-IMR cycle runs 30 to 45 calendar days for non-expedited reviews and under 7 calendar days for expedited.

03

72-hour expedited

Where a delay would seriously jeopardize the enrollee’s life, health, or ability to regain maximum function, the expedited channels collapse to 7 calendar days for DMHC 7-day IMR under Cal. Health & Safety Code § 1370.4(a), to overnight CDI intervention for ongoing care, or to 72 hours under the federal ERISA § 503 urgent-claim framing at 29 C.F.R. § 2560.503-1(f)(2) for self-funded plans. The appeal letter should frame the request as a continuation of an established clinical plan, not a new request, to put the expedited window on the table.

01 · CA-licensed carriers

Independent Medical Review through the DMHC Help Center — phone 1-888-466-2219 or the online complaint form at dmhc.ca.gov.

CA

UnitedHealthcare

Member portal·myuhc.com

Appeals fax·(verify on EOB)

UnitedHealthcare’s California membership runs through both fully-insured Knox-Keene licensee products (UnitedHealthcare of California) and self-funded ERISA group plans. For fully-insured enrollees the appeal routes through the myuhc.com member portal, then escalates to a DMHC complaint at 1-888-466-2219 (www.dmhc.ca.gov) with a 180-day IMR window under Cal. Health & Safety Code § 1370.4. For self-funded ERISA enrollees, the federal procedure at 29 C.F.R. § 2560.503-1 governs and the DMHC IMR channel is not available.

01 · CA-licensed carriers

Knox-Keene licensee for fully-insured CA products; self-funded ERISA plans fall outside the DMHC IMR channel.

Timelines

60-day internal (Knox-Keene) · 180-day IMR (DMHC) · 180-day internal (ERISA self-funded, no IMR)

CA

Aetna

Member portal·aetna.com member secure inbox

Appeals fax·1-860-975-1526

Aetna operates both Knox-Keene licensee products (Aetna Health of California) and CDI-regulated fully-insured PPO/EPO products in California. Aetna Health enrollees route appeals through the aetna.com member portal, then escalate to DMHC complaint → IMR. Aetna standard PPO enrollees route to the CDI IMR under Cal. Ins. Code § 10169.2. The ACA-mandated 1-860-975-1526 appeals fax is the same in California as elsewhere.

01 · CA-licensed carriers

Knox-Keene for HMO products; CDI-regulated for fully-insured PPO/EPO; ERISA § 503 for self-funded group plans.

Timelines

60-day internal · 180-day IMR (DMHC for HMO, CDI for PPO) · 180-day internal (ERISA self-funded)

CA

Blue Cross Blue Shield

Member portal·BCBS state portal

Appeals fax·(verify on EOB)

Blue Shield of California is a Knox-Keene licensee under Cal. Health & Safety Code § 1340 — it is the carrier that effectively shapes California’s appeal-rights framework. Appeals route through the blueshieldca.com member portal, then escalate to DMHC complaint → IMR under § 1370.4 within 180 days. Anthem Blue Cross enrollees on fully-insured CA products are also Knox-Keene licensees; Anthem Blue Cross PPO enrollees are CDI-regulated.

01 · CA-licensed carriers

Knox-Keene licensee for both Blue Shield of California and Anthem Blue Cross fully-insured CA products.

Timelines

60-day internal · 180-day IMR (DMHC for Knox-Keene) · 180-day internal (ERISA self-funded)

CA

Cigna

Member portal·mycigna.com

Appeals fax·(verify on EOB)

Cigna operates both Knox-Keene licensee products (Cigna HealthCare of California) and CDI-regulated fully-insured PPO/EPO products in California. Cigna HealthCare of California enrollees route appeals through mycigna.com, then escalate to DMHC complaint → IMR under § 1370.4. Cigna standard PPO enrollees route to the CDI IMR under Cal. Ins. Code § 10169.2. Self-funded ERISA plans through Cigna fall under 29 C.F.R. § 2560.503-1.

01 · CA-licensed carriers

Knox-Keene for HMO products; CDI-regulated for fully-insured PPO/EPO; ERISA § 503 for self-funded plans.

Timelines

60-day internal · 180-day IMR (DMHC for HMO, CDI for PPO) · 180-day internal (ERISA self-funded)

CA

Humana

Member portal·myhumana.com

Appeals fax·1-502-508-9301

Humana operates primarily CDI-regulated fully-insured PPO/EPO products in California; Humana HMO products are not commonly issued in CA. CDI-regulated PPO/EPO enrollees route appeals to the CDI IMR under Cal. Ins. Code § 10169.2 within 180 days of the final internal denial. Self-funded ERISA group plans through Humana fall under 29 C.F.R. § 2560.503-1. The ACA-mandated 1-502-508-9301 appeals fax is the same in California as elsewhere.

01 · CA-licensed carriers

Primarily CDI-regulated PPO/EPO; ERISA § 503 for self-funded group plans; no Knox-Keene HMO commonly issued in CA.

Timelines

60-day internal · 180-day IMR (CDI) · 180-day internal (ERISA self-funded)

CA

Kaiser Permanente

Member portal·kp.org member account

Appeals fax·(verify on EOB)

Kaiser Permanente is a California-native Knox-Keene licensee under Cal. Health & Safety Code § 1340 and operates almost exclusively HMO products in CA. Kaiser enrollees route appeals through their PCP, through the kp.org Member Services appeal, or directly to the DMHC Help Center at 1-888-466-2219. The DMHC complaint triggers the IMR under § 1370.4 within 180 days of the final internal denial. Self-funded ERISA plans are rarely issued through Kaiser Permanente.

01 · CA-licensed carriers

Knox-Keene licensee; California-native HMO. Self-funded ERISA plans are uncommon on the Kaiser CA lineup.

Timelines

60-day internal via kp.org · 180-day IMR (DMHC)

CA

Anthem (Elevance)

Member portal·anthem.com

Appeals fax·(verify on EOB)

Anthem Blue Cross operates both Knox-Keene licensee products (Anthem Blue Cross HMO) and CDI-regulated fully-insured PPO/EPO products in California. Anthem Blue Cross HMO enrollees route appeals through the anthem.com member portal, then to DMHC complaint → IMR; Anthem Blue Cross PPO enrollees route to the CDI IMR under Cal. Ins. Code § 10169.2. Self-funded ERISA plans through Anthem fall under 29 C.F.R. § 2560.503-1.

01 · CA-licensed carriers

Knox-Keene licensee for fully-insured HMO; CDI-regulated for PPO/EPO; ERISA § 503 for self-funded plans.

Timelines

60-day internal · 180-day IMR (DMHC for HMO, CDI for PPO) · 180-day internal (ERISA self-funded)

CA

Centene

Member portal·plan-specific member portal

Appeals fax·(verify on EOB)

Health Net is a Centene subsidiary operating Knox-Keene licensee HMO plans, Knox-Keene licensee Medi-Cal managed-care plans, and CDI-regulated PPO/EPO products in California. Medi-Cal managed-care enrollees also have the parallel State Fair Hearing under Welfare & Institutions Code § 10950 within 90 days of the ABD. Commercial Knox-Keene enrollees route to DMHC complaint → IMR; Ambetter and other Centene Marketplace products follow the ACA external-review channel at 45 C.F.R. § 147.136(d).

01 · CA-licensed carriers

Knox-Keene for HMO and Medi-Cal managed-care; CDI-regulated for PPO/EPO; parallel Medi-Cal State Fair Hearing; ACA external review for Ambetter Marketplace plans.

Timelines

60-day internal · 180-day IMR (DMHC) · 90-day State Fair Hearing (Medi-Cal) · 4-month external review (ACA Marketplace)

CA

Molina Healthcare

Member portal·my Molina member portal

Appeals fax·(verify on EOB)

Molina Healthcare is California-headquartered and operates Knox-Keene licensee Medi-Cal managed-care plans, Knox-Keene licensee Marketplace HMO plans, and CDI-regulated PPO/EPO products in California. Medi-Cal enrollees have the parallel State Fair Hearing under Welfare & Institutions Code § 10950 within 90 days of the ABD — a separate administrative-law-judge review that runs alongside the DMHC IMR. Marketplace HMO enrollees route to DMHC complaint → IMR; Marketplace enrollees can also exercise the 4-month ACA external-review window at 45 C.F.R. § 147.136(d).

01 · CA-licensed carriers

Knox-Keene for Medi-Cal and Marketplace HMO; CDI-regulated for PPO/EPO; parallel Medi-Cal State Fair Hearing; ACA external review for Marketplace plans.

Timelines

60-day internal · 180-day IMR (DMHC) · 90-day State Fair Hearing (Medi-Cal) · 4-month external review (ACA Marketplace)

01 · The three CA-specific denial shapes we see most

The timelines and review rights that apply on a California denial.

  • 01

    Kaiser Permanente CA HMO denial of a specialty referral

    A Kaiser CA enrollee whose PCP has referred to a specialist (cardiology, oncology, neurology, rheumatology) but whose plan has denied the referral on ‘medical necessity not established’ or ‘out-of-network referral’ grounds. Kaiser is a Knox-Keene licensee Cal. Health & Safety Code § 1340 — the appeal routes through Kaiser’s internal Member Services appeal, then escalates to a DMHC complaint at 1-888-466-2219 or www.dmhc.ca.gov, then reaches Independent Medical Review under § 1370.4 within 180 days of the final internal denial.

  • 02

    Blue Shield of CA or Anthem Blue Cross medical-necessity denial

    A Blue Shield of California or Anthem Blue Cross enrollee whose carrier has denied a service on ‘medical necessity not established,’ ‘experimental / investigational,’ or ‘not a covered benefit’ grounds. Both Blue Shield of CA and Anthem Blue Cross are Knox-Keene licensees for their fully-insured CA products; Anthem Blue Cross PPO enrollees are CDI-regulated. The 60-day internal appeal runs through the carrier’s member portal, then escalates to IMR through the DMHC Help Center or through the CDI IMR under Cal. Ins. Code § 10169.2 within 180 days of the final internal denial.

  • 03

    Health Net or Centene Medi-Cal managed-care denial

    A Health Net (Centene) Medi-Cal managed-care enrollee whose plan has denied a covered Medi-Cal service on ‘medical necessity’ or ‘authorization not obtained’ grounds. Medi-Cal managed-care plans are Knox-Keene licensees — the denial routes through the same DMHC complaint pathway — but enrollees also have the parallel Medi-Cal State Fair Hearing under Welfare & Institutions Code § 10950, a separate administrative-law-judge review within 90 days of the ABD that runs alongside the DMHC IMR.

02 · Frequently asked

Three questions a California member typically has before drafting a CA appeal — with the DMHC, Knox-Keene, CDI, and ERISA procedures attached to each answer.

Top denial reasons in this state

Four denial reasons we see most in this state.

Each denial reason has its own appeal framework — pick the one that matches your EOB to land on the counter-argument, the cited framework, and the published submission channel that applies.

03 · Submit the California denial

The same denial — defended with the CA-specific adverse-determination framework.

Upload the most recent denial letter or EOB, answer the four short intake questions, and Denvow picks the DMHC complaint pathway under Cal. Health & Safety Code § 1368 for Knox-Keene licensee plans, the CDI IMR pathway under Cal. Ins. Code § 10169.2 for fully-insured PPO/EPO disputes, or the federal ERISA § 503 procedure at 29 C.F.R. § 2560.503-1 for self-funded employer plans — and the letter branches on whether you’re at the first-stage internal appeal or the 180-day IMR.

Submit the California denial →See the home page

Already in the intake? Pre-selected to “CA California” in the State field on the form — answer the rest of the four questions and submit. If your plan is self-funded ERISA, the intake sets the federal ERISA § 503 path automatically.

Other denial-reason pages

Cigna denial appeal guide·See the prior-authorization page·See the recurring-denial page·See the step-therapy exception page·See the step-therapy (fail-first) page·See the out-of-network / surprise-billing page

Denvow is template-and-tooling, not legal counsel. For denials that genuinely need litigation, an ERISA fiduciary complaint, or a state-court remedy, we recommend a licensed attorney in the relevant jurisdiction — and will say so when we see one.