Health Net California employer plan transition — the payroll checklist.
Health Net is exiting California's traditional commercial Small Group and Large Group medical markets. Once your new plan is chosen, the work moves to payroll: deductions, plan and tier codes, enrollment files, and reconciliation. This is that implementation list.
What is actually changing
Health Net is exiting California's traditional commercial Small Group and Large Group medical markets, including affected group HMO, PPO, and POS plans and CalChoice business. This is a market exit for those group segments — not a withdrawal from California.
Not affected: Medi-Cal, Marketplace and Covered California individual coverage, and Medicare. If your employees hear otherwise, correct it early — most of the confusion we see in payroll queues starts there.
Plan design, carrier comparison, and the transition decision itself are handled by Blue Ocean Benefits. This page picks up after that decision, on the payroll and HCM implementation side.
One update since the original notice: small groups can move into CaliforniaChoice and keep Health Net through a January 1, 2027 effective date, with a full plan year after that. Details are on the Blue Ocean Benefits guide linked above.
A short look at what a carrier market exit actually triggers for a California employer — and where the payroll work begins.
- September 1, 2026Employer and broker notices began
- September 1, 2026Last new-business effective date
- January 1, 2027Last effective date for small groups (1–100) joining CalChoice with Health Net membership; CalChoice offers special underwriting for 9/1/26–1/1/27 effective dates
- February 1, 2027Final renewal effective date, subject to formal guidelines and case-specific exceptions
- February 28, 2027Affected group coverage ends, or as otherwise permitted by contract or regulatory requirements
Dates reflect general market guidance. Confirm your own group's dates in writing before configuring payroll.
Plan and carrier analysis is handled by Blue Ocean Benefits.
Start there for the coverage decision. Come back here for the payroll build. We're one team across both.
Eight things payroll owns in a carrier change.
- Get your group's specific termination date and final renewal effective date in writing from the carrier or broker — general market dates are not a substitute for your case.
- Note any approved exception, since guidelines allow case-specific variation.
- Record the incoming plan's effective date and whether it is the first of a month that falls mid-pay-period.
- Distribute one dated summary to payroll, HR, finance, and the benefits admin so every downstream configuration references the same source.
- Rebuild the contribution formula against the new rate sheet — a flat dollar contribution and a percentage contribution behave very differently when rates move.
- Separate pre-tax Section 125 amounts from any post-tax amounts, and confirm the new deductions carry the correct tax treatment in your system.
- Recheck imputed income items and any domestic partner coverage that changes tax handling.
- Model the per-paycheck change for a few real employees at each tier before go-live, and check the effect on minimum wage and garnishment order calculations.
- Create new deduction and benefit plan codes rather than editing the old ones; overwriting destroys the audit trail and corrupts year-to-date reporting.
- Build a one-to-one crosswalk from the old plan and tier structure to the new one, and flag every tier that does not map cleanly.
- Confirm the coverage-tier naming your new carrier expects on the enrollment file, not the naming your payroll system uses internally.
- Set stop dates on the terminating plan codes so deductions cannot continue past the final coverage date.
- Work backwards from the new carrier's first file deadline to set your open-enrollment window, approval cutoff, and payroll entry date.
- Decide how new hires, terminations, and qualifying life events during the transition window are handled — these are the records most often lost between systems.
- Plan a full initial enrollment file and then the ongoing change-file cadence, and confirm which one your carrier expects first.
- Freeze non-urgent benefit changes for a short window around the cutover so the file, payroll, and carrier agree on a single snapshot.
- List every system in the chain: HCM or payroll, benefits administration, carrier, and any COBRA or TPA vendor.
- Confirm whether an existing EDI feed is being modified or a new one is being built, and who owns testing on each side.
- Run a test file and reconcile it record-by-record before the first live file; do not treat a successful transmission as a successful enrollment.
- Name one owner per connection with a backup, and agree on how failures get reported rather than silently retried.
- Before releasing the first payroll under the new plan, run a deduction register and compare it line-by-line with expected amounts by tier.
- Look specifically for employees carrying both old and new deductions, or neither.
- Reconcile the first carrier invoice against enrollment and against payroll deductions — three-way, not two-way.
- Correct arrears and overcollections deliberately, on a documented schedule, rather than absorbing them in a single check.
- Keep ACA tracking continuous across the change: offer-of-coverage data and affordability inputs both shift when plans and contributions change.
- Confirm how continuants are handled, and who notifies your COBRA or Cal-COBRA administrator of the plan change and the new rates.
- Review employees on leave, reduced hours, or unpaid status — their deduction handling and arrears rules often need explicit decisions.
- Coordinate with counsel or your benefits advisor on notice obligations; this checklist is operational guidance, not legal or plan advice.
- Send one clear message that states what is changing, when, and what employees must do — and say plainly that Medi-Cal, Covered California individual coverage, and Medicare are not affected by this exit.
- Tell employees what their paycheck will look like on the first affected check date, before that check date.
- Publish a single escalation path for benefit questions versus paycheck questions, with named owners for each.
- Log every exception you grant during the transition so the next renewal starts from a documented baseline.
A practical 30/60/90-day plan.
- Confirm your group's dates in writing
- Start the plan and carrier review with Blue Ocean Benefits
- Inventory every system, feed, and vendor in the benefits chain
- Name owners for payroll, enrollment, and communication
- Build plan and tier code crosswalks
- Rebuild contribution and deduction configurations in a test environment
- Agree file formats and deadlines with the incoming carrier
- Run and reconcile a test enrollment file
- Set stop dates on terminating deduction codes
- Communicate paycheck impact ahead of the first affected check date
- Reconcile the first payroll deduction register
- Three-way reconcile the first carrier invoice and close out arrears
Questions we're getting
No. Health Net is exiting California's traditional commercial Small Group and Large Group medical markets, including affected group HMO, PPO, and POS plans and CalChoice business. Medi-Cal, Marketplace and Covered California individual coverage, and Medicare are not part of this exit.
It changes the timing more than the work. Small groups (1–100) can move into CaliforniaChoice and keep Health Net for a plan year, with special underwriting for September 1, 2026 through January 1, 2027 effective dates. Even when the carrier and plans stay the same, the group is now billed through CalChoice on one consolidated invoice, so remittance, enrollment file destination and invoice reconciliation change now — and the plan and tier code work arrives at the following renewal. Blue Ocean Benefits handles the CalChoice-versus-direct comparison.
Employer and broker notices began September 1, 2026, which was also the last new-business effective date. The final renewal effective date is February 1, 2027, subject to formal guidelines and case-specific exceptions, and affected group coverage ends February 28, 2027 or as otherwise permitted by contract or regulatory requirements. Confirm your own group's dates in writing before configuring anything.
Blue Ocean Benefits handles plan design, carrier comparison, and the transition review. This page covers only the payroll, deduction, and HCM implementation work that follows that decision.
After the new plan, rates, and effective date are confirmed in writing, and early enough that the change lands on the correct check date rather than the correct calendar date. Map the pay period the new deductions belong to first, then work backwards to your file and approval deadlines.
Tier mapping and mid-cycle effective dates. Employee-only versus employee-plus-family tiers rarely match one-for-one between carriers, and a plan that starts mid-pay-period creates split deductions that only surface on the first invoice reconciliation.
Coverage decision first. Payroll build second.
Blue Ocean Benefits runs the plan and carrier review. We keep the payroll, deduction, and HCM side clean behind it — so the first payroll after the change is boring.