Rated-Age Methodology for WCMSAs: A Practitioner's Guide

The rated age is the single largest non-medical lever in a Workers' Compensation Medicare Set-Aside Arrangement. Two cases with identical injury profiles, identical treatment courses, identical projected future-care plans, and identical chronological ages can carry meaningfully different allocation totals based on whether a rated age was obtained, who obtained it, and how it was supported. The mechanic is straightforward — a rated age compresses the projection horizon, and a shorter horizon multiplies through every per-year line item in the allocation — but the underwriting work behind it, the documentation it requires, and the situations in which CMS or a carrier challenges it, are not.

This guide walks the rated-age methodology from start to finish: what a rated age is and why MSAs use them, the underwriting process and which mortality tables CMS recognizes, the role of MSA-specialty rated-age underwriters, turnaround norms, the documentation requirements, the dollar mechanics on a worked example, and the practical questions of when CMS reviewers historically challenged rated ages and when to obtain more than one. It is written for the people who order rated ages, evaluate them, and explain them to settlement parties: defense counsel, claims operations, settlement planners, and MSA preparation shops.

What a Rated Age Is and Why MSAs Use Them

A rated age is an age estimate produced by an underwriter that reflects an individual's expected life expectancy as if they were a different chronological age. A 50-year-old with a serious cardiac history, advanced diabetes, and a severe orthopedic disability may have the life expectancy of a typical 65-year-old. The underwriter assigns a rated age of 65, meaning the actuarial life expectancy of a 65-year-old in the relevant mortality table is the appropriate horizon for forward-looking financial planning involving this individual.

The use of rated ages predates MSAs by decades. The structured-settlement industry uses rated ages to price life-contingent annuities for severely injured plaintiffs, where the chronological-age life expectancy would over-state the expected payout horizon and make the annuity uneconomic. Life insurance underwriters use rated ages in pricing risk. The MSA application of rated ages is a direct adaptation: where the financial planning question is "how many years of future medical care should this MSA fund," and where the answer is materially shorter than chronological-age life expectancy due to morbidity, the rated age is the actuarially defensible input.

CMS recognizes rated ages explicitly. Section 10.3 of the WCMSA Reference Guide (Rated-Age Information or Life Expectancy) is the operative section. The Reference Guide directs preparers to provide either rated-age information or life expectancy information in the report, and to support the rated age with documentation from the underwriter. Where multiple rated ages exist, the Reference Guide directs that the lower (more aggressive) rated age be used, on the principle that a more conservative life-expectancy assumption produces a more protective allocation.

The reason MSAs use rated ages, rather than chronological ages, is not analytical preference. It is that MSA cases by definition involve significantly injured workers whose morbidity profile is meaningfully worse than population baseline. Using the chronological-age life expectancy in those cases would systematically over-fund MSAs, locking dollars into allocations that the claimant is unlikely to live to spend. The rated age corrects for that.

The Underwriting Process

A rated-age request is sent to a specialty underwriter with a packet typically including the medical record summary, the rated age request form, and any contextual information about the injury. The underwriter reviews the packet, applies their internal underwriting criteria — proprietary morbidity tables, condition-specific debit-and-credit systems adapted from life insurance underwriting, and reference to published actuarial tables — and produces a rated age letter stating the rated age, the basis for it, and (sometimes) the assumed mortality table.

The underwriter's input is the medical record. The output is a number. The work in between is judgment-laden: how much weight to give a documented cardiac history versus its current control, how to handle a behavioral health overlay, how to weigh the comorbidities specifically tied to the work injury versus those that are independent. Different underwriters can and do produce different rated ages on the same packet, which is why obtaining more than one rated age is sometimes appropriate and why the Reference Guide's lower-rated-age rule exists.

The mortality table reference is the next layer. CMS's own life-expectancy calculation, per its updates to the Reference Guide, draws from the Centers for Disease Control and Prevention (CDC) Life Tables. The operative table updates frequently: the 2022 Life Table took effect June 14, 2025 (implemented in v4.4); the 2023 Life Table took effect September 20, 2025 and is the reference incorporated into Section 10.3 of v4.5 (April 13, 2026). Prior versions of the Reference Guide referenced earlier CDC tables, including the 2020 table (v3.9, effective April 29, 2023) and the 2021 table (v4.0, effective February 24, 2024). CMS publishes the table reference because the WCRC's own life-expectancy fallback (used when no rated age is provided, or when a rated age is rejected) is calculated against that table.

Underwriters' internal tables are not necessarily identical to the CDC tables CMS uses. Many underwriters work from blended sources or from proprietary mortality experience. A rated age letter that explicitly states the mortality basis is more defensible than one that does not, and a rated age that aligns with or is more conservative than the CMS-referenced CDC table is harder to challenge.

The Role of MSA-Specialty Rated-Age Underwriters

The structured-settlement-broker underwriting channel produces rated ages as a service to the broker placing the annuity. Those underwriters are typically inside life insurance companies, working through brokers, and the rated age is bundled with an annuity quote. Turnaround in this channel runs to multiple business days, and the rated age is functionally a byproduct of the annuity-pricing workflow.

A second channel has emerged for MSA work specifically. KP Underwriting is named publicly as Tower MSA Partners' rated-age partner in a 2023 Tower interview with Kevin Puckett, the firm's principal. The interview describes KP's turnaround norms — two to three hours during business hours for standard requests, with rush availability inside an hour — and KP's positioning as a specialty underwriter focused on the MSA use case rather than the broader structured-settlement market. The interview is the public reference for the existence of MSA-specialty underwriting; we name KP because the firm is identified in publicly available material and decline to invent additional firm names.

The two channels produce different operational profiles. The structured-settlement-broker channel is comfortable for cases where the MSA preparation timeline is multi-week and where the broker is also placing the structured annuity for the settlement. The MSA-specialty channel is built for cases where the MSA preparation is on a tight clock and the rated age is the binding queueing constraint. (See our guide on 48-hour WCMSA preparation for how the rated-age channel choice interacts with expedited preparation timing.)

A preparing shop's choice of rated-age channel is partly an operational decision (what is the typical turnaround the shop's caseload requires) and partly a relationship decision (which underwriter does the shop have a working relationship with, and what does the underwriter charge per request). Defense counsel and carriers ordering MSAs from a preparing shop generally do not select the rated-age underwriter directly; they inherit whichever channel the shop has built into its workflow. Asking the shop, at the engagement stage, which channel they use and what the typical turnaround is on the case profile is a reasonable diligence question.

Turnaround Norms

Synthesizing the public references and standard industry practice:

MSA-specialty channel (e.g., KP Underwriting per Tower's published interview): hours during business hours, with rush capacity inside an hour. Cost is a per-request fee, typically modest relative to the MSA preparation engagement.
Structured-settlement-broker channel: multiple business days, sometimes a week or more on cases where the underwriter has a backlog or where the medical packet requires follow-up. Cost is bundled with the broker's annuity placement work.
In-house underwriting at large MSA preparation shops: some shops have internal rated-age capability or exclusive partnerships with specialty underwriters. Turnaround in those cases follows the partner's profile.

The variance across channels is the largest single driver of total MSA preparation timeline variance. A shop that returns rated ages in hours can deliver a complete MSA in days; a shop that waits a week for rated ages cannot deliver in a comparable window regardless of how efficient the rest of the workflow is.

How the Rated Age Compresses the Projection Horizon: A Worked Example

The dollar mechanics are straightforward to model. The rated age compresses the projection horizon, and the horizon multiplies through every per-year line item.

Consider a hypothetical claim: a 50-year-old male with a chronic low-back injury, a cardiac comorbidity (post-MI, currently controlled), and a long-running opioid regimen. We model two scenarios on the same projected future-care profile:

Scenario A: chronological age of 50, life expectancy of 28 additional years (illustrative, for a healthy 50-year-old male per recent CDC tables; actual figures should be confirmed against the operative CDC table).
Scenario B: rated age of 65, life expectancy of approximately 18 additional years (illustrative; actual figures should be confirmed against the operative CDC table).

The projected future-care profile (annual recurring costs, before duration multiplier):

Component	Annual Cost
Pain management visits and procedures	$9,500
Pharmacy (opioid + adjuvants, generic)	$3,200
Physical therapy (intermittent)	$2,400
Diagnostics (periodic imaging)	$800
Annual recurring	$15,900

Plus a one-time projected procedure (intrathecal pump replacement at year 8 of horizon): $42,000.

Scenario A — chronological 50, 28-year horizon: Annual recurring × 28 years = $15,900 × 28 = $445,200 Plus one-time procedure (pump replacement, year 8): $42,000 Allocation total: approximately $487,000

Scenario B — rated age 65, 18-year horizon: Annual recurring × 18 years = $15,900 × 18 = $286,200 Plus one-time procedure (pump replacement, year 8): $42,000 Allocation total: approximately $328,000

Difference: approximately $159,000, or roughly 33% of the chronological-age allocation. On a $400,000-class case, the rated age moves real money. The carrier funds a smaller allocation; the claimant settles a smaller MSA; the structured annuity (if chosen) is correspondingly smaller; the case closes on different economics.

This is also why rated-age underwriting matters as a discipline. A rated age that is too aggressive — assigning 65 to a 50-year-old whose comorbidities do not actually support that compression — under-funds the MSA and exposes the claimant to running out of dollars in real time. A rated age that is too conservative over-funds the MSA and ties up settlement dollars that the carrier would have rather paid to the claimant directly or applied elsewhere. The defensibility of the rated age, supported by the underwriter's letter and consistent with the medical record, is what makes the allocation defensible at this size.

When CMS Challenged Rated Ages (Pre-July 2025) and What That Tells Us Now

Under the pre-July 17, 2025 review regime, the WCRC could and did challenge rated ages on submitted MSAs. The familiar challenge patterns:

Rated age inconsistent with the records. A rated age compressing chronological age by fifteen years requires a documented morbidity profile that supports the compression. A rated age letter assigning a substantial compression on the basis of records that do not actually establish significant morbidity is challenged.

Rated age relying on a stale or non-CMS-recognized mortality table. The Reference Guide aligns the WCRC's own life-expectancy fallback with the current CDC table. A rated age explicitly drawn from a meaningfully different table — particularly one more aggressive than the CDC table for the relevant age — is harder to defend.

Multiple rated ages obtained without explanation. When more than one rated age was obtained, the Reference Guide directs use of the lower (more aggressive) one. A submission that picked a higher rated age while a lower one existed in the file invited counter.

Rated age letter missing from the appendices. A rated age cited in the body of the report without an attached underwriter letter is structurally weak. The WCRC counters by either requesting development or by recomputing the allocation on its own life-expectancy basis.

Rated age that contradicts the treating-provider's expressed prognosis. Where the medical record contains treating-provider statements about the claimant's expected longevity or functional trajectory, a rated age sharply inconsistent with those statements is challenged.

The post-July 17, 2025 environment changes the audience but not the methodology. Funded cases above the review thresholds may still be voluntarily submitted, and the WCRC still applies the same review patterns when it does review. Cases not submitted — and the entire $0 population, which no longer goes to CMS at all (see our companion guide on the $0 policy change) — generate rated-age documentation that may instead be examined by a future MSP recovery contractor, by carrier compliance auditors, or by claimants (or their later counsel) reopening administration questions. The methodology should be the same in both worlds; the audience for the documentation is what shifted.

Documentation Requirements

A rated-age section in a defensible MSA report contains, at minimum:

The rated age itself, stated clearly (e.g., "Rated age 65" rather than "rated approximately 65")
The underwriter that issued the rating, with the underwriter letter attached as an appendix
The date of the rated age letter
The mortality basis the underwriter used, where stated, or a note that the basis was not stated
The medical packet that was sent to the underwriter (typically referenced by the medical records summary or a specific cover letter)
If multiple rated ages were obtained: all rated ages with dates and underwriters, and an explanation of which one was used and why (typically the lower of the two, per Reference Guide guidance)
The CDC Life Table that the report uses for any non-rated-age calculations, where applicable
The horizon (in years) that the rated age yields, as applied in the allocation

A report that pares any of these down — citing the rated age in the body but omitting the letter, or stating the rated age without the underwriter — is materially weaker. The cost of including the documentation is trivial; the cost of omitting it shows up at review or audit.

Multiple Underwriters: When and How

Obtaining more than one rated age is sometimes appropriate. Three settings call for it:

High-value cases where the rated age is the largest variable. On a case where the difference between two plausible rated ages translates to a six-figure allocation difference, the cost of a second underwriter's opinion (typically a few hundred dollars per request) is small relative to the dollars the rated age moves. A second rated age either confirms the first (strengthening defensibility) or produces a divergence that the parties must explain.

Cases with mixed comorbidity profiles. A claimant with a compelling cardiac history but limited orthopedic morbidity may rate differently across underwriters whose internal tables weight cardiac risk differently than orthopedic disability. A second opinion surfaces that variance.

Cases where the first rated age looks wrong. If a preparing shop receives a rated age that does not align with the medical record — too aggressive, too conservative, or based on a partial reading of the records — a second request to a different underwriter is the right response. A rated age that the shop itself does not believe is not defensible to anyone downstream.

The reconciliation, when multiple rated ages exist, follows the Reference Guide: use the lower (more aggressive) rated age in the allocation, document all rated ages obtained, and explain the choice. A submission that suppressed a second rated age in favor of a higher one obtained earlier is a vulnerability if the suppression is discovered.

For cases where two rated ages diverge meaningfully and the preparing shop has legitimate reason to question the lower one (a clear misread of the medical record, an underwriter known to be aggressive on a comorbidity that does not apply), the path is documentation: an explanation in the methodology disclosures, addressed to a future reviewer. The Reference Guide's lower-rated-age rule is a default that can be displaced with documented reasoning, but the displacement requires the documentation.

Rated Age Versus No Rated Age

Not every MSA case uses a rated age. Younger claimants without significant comorbidities, cases where the chronological-age life expectancy is short enough that the marginal compression a rated age would provide is small, and cases where the cost of obtaining a rated age exceeds the dollar impact on the allocation, can reasonably be allocated using chronological-age life expectancy from the operative CDC Life Table.

The decision to forgo a rated age should be conscious and documented. A report that uses chronological-age life expectancy without explanation, on a case where a rated age would have meaningfully changed the allocation, looks like an oversight rather than a methodological choice. The methodology disclosures should state the choice explicitly.

The reverse case — using a rated age where chronological-age life expectancy would have been adequate — is rare in practice because the rated age compresses the allocation downward and the parties tend to agree on the lower number.

Rated-Age Shelf Life

A rated age is not perpetual. The medical packet on which it was based was a snapshot, and the claimant's morbidity profile evolves. Industry practice treats rated ages as having a useful life of roughly twelve to eighteen months for active settlement use; a rated age much older than that on a case where the claimant's medical course has materially evolved is generally re-ordered. A rated age that has been issued in the recent past on a stable claimant can be carried forward.

For high-value cases where MSA preparation is foreseeable but the settlement timing is uncertain, ordering the rated age early — and being prepared to refresh it if the settlement slips beyond the useful-life window — removes a queueing variable from the eventual preparation timeline. The carrier or counsel that orders the rated age in advance is often in a better position to expedite the eventual MSA than one that waits to begin the process at the moment the settlement firms up.

Practical Implications

For defense counsel and settlement planners. The rated age is a settlement-design input, not just an MSA preparation detail. Ordering the rated age early, when the case is high-value and MSA preparation is foreseeable, removes the largest single queueing variable from the eventual timeline. Asking the preparing shop which underwriter channel they use is a reasonable diligence question that surfaces whether the engagement is operationally compatible with the available timeline.

For MSA preparation shops. The rated-age channel is operationally load-bearing. A shop that relies on a multi-day underwriting channel cannot deliver expedited MSAs regardless of internal automation. A shop that has a same-day MSA-specialty channel has a real timing advantage that should be visible to clients ordering on tight settlement clocks.

For carriers and self-insured employers. Internal MSP compliance programs should articulate when rated ages are required, when chronological-age life expectancy is acceptable, and what documentation standard the rated age must meet to enter the file. A program that accepts rated ages without underwriter letters is accepting documentation gaps that will surface later.

For claimant's counsel. The rated age can be requested by either side. A defense-ordered rated age that the claimant's counsel views as too aggressive can be challenged by ordering a second rated age. The Reference Guide's lower-of-two rule cuts in favor of the carrier's allocation discipline, not the claimant's settlement value, but the existence of the second opinion is the lever for a substantive conversation about the right horizon.

Sources

WCMSA Reference Guide v4.5 (April 13, 2026 PDF) — CMS — Section 10.3 (Rated-Age Information or Life Expectancy), Section 9.4.5 (replacement-procedure life-expectancy mechanics)
WCMSA Reference Guide v4.5 (April 13, 2026 PDF) — CMS — current operative version; Section 10.3 references the CDC's "Table 1: Life Table for the total population: United States, 2023" (effective September 20, 2025)
WCMSA Reference Guide v4.4 (July 2025 PDF) — CMS — historical reference; v4.4 referenced the 2022 CDC Life Table (effective June 14, 2025), superseded by v4.5
Workers' Compensation Medicare Set-Aside Arrangements — CMS
What's New — Workers' Compensation Medicare Set-Aside Arrangements (CMS)
Tower Partners interview with KP Underwriting — Tower MSA Partners — public reference for MSA-specialty rated-age turnaround norms (two-to-three hour business-hour standard, rush availability inside an hour)
A Deep Dive into the WCMSA Reference Guide v4.0 April 2024 Updates — Ametros — practitioner commentary on Section 10.3 mortality table updates
CDC National Vital Statistics Reports — Life Tables — primary source for the CDC Life Tables CMS references

A redacted sample MSA showing how Zicron AI documents rated-age methodology in the report's appendices and methodology disclosures is available at zicron.claims/msa/sample. For settlements that need a 48-hour MSA with a defensible rated-age workflow, see zicron.claims/msa.

Rated-Age Methodology for WCMSAs: How They Work, Why They Matter, and What to Do With Them