ASOP 49 Exposure Draft: First Rewrite of the Medicaid Capitation Standard Since 2015

The Actuarial Standards Board voted in March 2026 to expose a full revision of ASOP No. 49, the standard governing Medicaid managed care capitation rates, with comments due September 1, 2026 (ASB, March 2026). It is the standard's first rewrite since its 2015 adoption, and it lands seven substantive changes.

The stakes are not niche. Risk-based managed care plans covered 66 million Medicaid enrollees, 78% of the program, as of July 2024, and payments to those plans absorb about half of total Medicaid spending (KFF, 2025). One week of comment window remains.

Key Takeaways

• The ASB approved the exposure draft in March 2026 and retitled the standard Medicaid Managed Care Capitation Rates, dropping "Rate Development and Certification." Comments close September 1, 2026.
• The draft removes references to specific federal regulations. The existing standard predates the 2016 Medicaid Managed Care Final Rule, and much of its content was later codified in 42 CFR 438.
• Section 3.2.11 adds a six-factor checklist for managed care adjustments, including population churn and the program's historical performance against previous efficiency assumptions.
• Section 3.4 expands the qualified-opinion trigger: rates built on a mandate without an appropriate actuarial adjustment should draw a qualified opinion on actuarial soundness.
• Underwriting gain guidance now folds in income taxes, and certifying actuaries should test soundness net of performance withholds that are not reasonably achievable.

What Changed and Where

The transmittal memorandum lists seven notable changes from the existing standard, excluding pure readability edits (ASOP No. 49 exposure draft, March 2026). Each maps to a specific section:

A Standard Rebuilt Around Federal Regulation, Not On It

The current ASOP 49 was adopted in 2015, twelve years after federal actuarial soundness regulations took effect in 2003. It predates the 2016 Medicaid Managed Care Final Rule, and significant portions of the original standard were subsequently codified in 42 CFR 438.

That sequencing left the standard duplicating regulation it once anticipated. The ASB's stated goal is to "clarify items from the original ASOP, remove references to specific federal regulations, and ensure that the standard provides sufficient guidance to actuaries working in this market" (ASB transmittal memorandum, March 2026). Educational language throughout was converted to guidance.

The de-federalization is deliberate durability engineering. CMS revises its Medicaid managed care rate development guide annually, and the 2026 edition already shifted certification mechanics, as actuary.info covered in the 2026 rate guide's certification changes. A standard pinned to regulation text ages with every guide cycle; one pinned to actuarial method does not.

Scope now enumerates five kinds of work, applying to CHIP as well as Title XIX:

• developing or certifying rates on behalf of a state to meet federal actuarial soundness requirements;
• developing or certifying on behalf of an MCO as part of a rate bid or rate acceptance;
• developing, certifying, or reviewing a department of insurance capitation rate filing;
• reviewing or opining on behalf of an MCO; and
• reviewing on behalf of a government agency.

The proposed effective date is work performed on capitation rates effective 12 months or more after adoption. On a typical cadence, final adoption in 2027 would reach rating periods from 2028 forward.

The Managed Care Adjustment Checklist

Section 3.2.11 governs the adjustment that assumes a program will operate at a different level of managed care efficiency than its base data reflects. The existing rule of restraint survives: the actuary should only apply adjustments that are reasonably attainable during the rating period.

The draft then adds six items the actuary should take into account when reviewing the need for and developing these adjustments:

1. applicable law;
2. state contractual and operational requirements;
3. characteristics of the provider markets;
4. the maturity level of the managed care program;
5. the average enrollment duration or churn of the population; and
6. historical performance against previous managed care adjustments.

Two of the six carry real bite. Item five puts enrollment churn directly into the efficiency assumption, timely as states shorten redetermination cycles; actuary.info walked through that churn mechanism in the six-month redetermination analysis. A population that turns over every few months cannot deliver care-management savings calibrated on a stable one.

Item six is a look-back requirement in all but name. If prior rate cycles assumed efficiency savings that never materialized, the actuary should now weigh that track record before assuming them again. That converts the managed care adjustment from a negotiable plug into a defended, evidence-tested assumption.

Enrollment Timing, Income Taxes, and Withholds

The new Enrollment Timing Adjustment (3.2.7.4) generalizes the old retroactive eligibility adjustment. It covers any change in how individuals enroll with MCOs: retroactive eligibility periods that are not the MCO's responsibility, and shifts in how quickly applicants are enrolled after the application date.

Non-benefit expense guidance gains an income tax dimension. The underwriting gain provision should reflect the cost of capital and a margin for risk, and where a tax, assessment, or fee is not deductible for corporate tax purposes, the actuary should adjust the provision for the resulting corporate tax cost (section 3.2.13.3).

Performance withholds get their own soundness test. The certifying actuary should confirm that rates minus any withhold portion tied to targets that are not reasonably achievable remain actuarially sound, and should not build performance incentive payments into rate development at all (section 3.2.16). The magnitude of withholds deemed not reasonably achievable becomes a required disclosure.

Two Actuaries, One Certification

The draft also formalizes a division of labor the market already runs on. Federal regulation requires every capitation rate the state pays to be certified as actuarially sound. The certifying state actuary, though, "is not certifying that the underlying assumptions supporting the certification are appropriate for an individual MCO" (ASOP No. 49 exposure draft, section 3.1).

The MCO side gets parallel treatment. An MCO actuary may be contractually required to submit certified rates with a bid, and the underwriting gain guidance lets that actuary include components beyond cost of capital and risk margin, reflecting the plan's own experience, contract duration, and strategy. Those components can produce a negative net underwriting gain (section 3.2.13.2).

Rate ranges carry their own test. When a state certifies a range, the certifying actuary should confirm contracted rates sit inside it measured at the budget-neutral rate, calibrated to rate-cell average resource use, not the risk-adjusted rate reflecting an MCO's actual enrollee mix (section 3.2.2). That choice of yardstick decides whether risk adjustment can legitimately carry a contracted rate outside the certified range.

Budget Mandates Meet the Qualified Opinion

The analytical center of the draft is the pairing of sections 3.3 and 3.4. Where a component of the capitation rates is mandated, a state budget instruction being the draft's own example, the certifying actuary must determine the appropriateness of the resulting rates using the section 3.2 adjustments.

Section 3.4 then says what happens when that determination fails. The actuary should issue a qualified opinion if the rates were developed on a mandate without an appropriate adjustment, or if a certifying MCO actuary concludes a negative underwriting gain is appropriate for that MCO. The soundness definition itself is unchanged in spirit: rates are sound if "they are projected to provide for all reasonable, appropriate, and attainable costs" (ASOP No. 49 exposure draft, section 2.1).

The timing gives this teeth. Federal Medicaid spending reductions are pushing states toward exactly the mandated increases, decreases, and caps section 3.3 describes, a collision actuary.info has tracked in the OBBBA capitation soundness analysis. A standard that names the qualified opinion as the exit ramp makes it harder for a certification to quietly absorb a budget number.

The Four Questions the ASB Is Asking

Beyond general comments, the transmittal memorandum asks four specific questions:

1. Is the guidance clear on what the actuary should do when mandated capitation or revenue minimums, maximums, increases, or decreases can or cannot be achieved through appropriate actuarial adjustments?
2. Does the draft appropriately minimize duplication with federal regulations (42 CFR 438) while retaining sufficient guidance and clarity?
3. Is the generalized special payments language in section 3.2.6, broadened to cover state directed payments under current federal nomenclature, clear and appropriate?
4. Was the ASB right to exclude specific guidance on mid-rating-period changes for programmatic items or entering and exiting MCOs as too specific?

Question three is the sleeper. State directed payments are the fastest-growing lever in managed care finance, and CMS has proposed rate limits on roughly $145 billion of them, as covered in the state-directed payment NPRM analysis. How firmly the final standard binds SDPs into rate development will decide how much of that money flows through certified rates rather than around them.

The ASOP 45 Companion Draft

The board exposed a second draft the same week: ASOP No. 45, retitled The Use of Health Status-Based Risk Adjustment Methodologies, on the same September 1 deadline (American Academy of Actuaries, Summer 2026). The revision removes model design, review, and modification from scope and tightens guidance on input data quality and consistency across organizations and time periods.

The two drafts interlock inside Medicaid work: the ASOP 49 draft's budget-neutral risk adjustment section points actuaries to ASOP 45 for the risk adjustment mechanics. actuary.info's June deep dive on the ASOP 45 rewrite covers that draft's substance. A third health-adjacent item, the second exposure draft of a proposed reinsurance pricing ASOP, runs on a later October 15 clock; see the reinsurance pricing ASOP coverage.

Comment Mechanics and the Certification Horizon

Comments go to comments@actuary.org with "ASOP No. 49 COMMENTS" in the subject line, using the ASB's comments template. Signed comments are posted publicly in the order received; anonymous submissions are not considered (ASB transmittal memorandum, March 2026).

For actuaries certifying rates today, nothing changes on September 2. The existing 2015 standard governs until adoption, and the 12-month runway pushes first application into rating periods that, on the usual cycle, begin in 2028. The disclosure list, though, is worth reading now: mandated minimums and maximums, withhold magnitudes, and managed care adjustment summaries all become explicit items in the actuarial report.

The practical read: the draft codifies where Medicaid rate certification already gets contested. Efficiency assumptions, budget mandates, and withheld revenue are the three places state fiscal pressure leans on the rate. Each now has named guidance, a named disclosure, or a named qualified-opinion trigger. Actuaries who have absorbed that pressure informally have until September 1 to say whether the formal version is workable.