The value of a Missouri workers' compensation claim depends on a single calculation: the disability rating percentage multiplied by the number of weeks assigned to your injury, multiplied by your weekly compensation rate. That formula — codified in Section 287.190 of the Missouri Revised Statutes — determines whether a back injury is worth $10,000 or $100,000.

Our analysis of 2,615 LIRC decisions and 29,230 extracted entities reveals how that formula plays out in practice — which injuries produce the highest disability ratings, how "body as a whole" designations dominate back injury claims, and which attorneys and law firms handle the most cases on each side of the table.

How Missouri Calculates Disability Compensation

Before examining the data, understanding Missouri's dual-track disability system is essential.

Scheduled Injuries: Fixed Weeks by Body Part

Section 287.190 assigns specific week values to injuries affecting extremities, eyes, and ears. These are "scheduled" injuries with compensation capped at the statutory maximum for that body part:

| Body Part | Maximum Weeks | |-----------|--------------| | Arm at shoulder | 232 | | Hand at wrist | 175 | | Leg at hip | 207 | | Leg at/above knee | 160 | | Foot at ankle | 150 | | Eye (loss of sight) | 140 |

The compensation formula for scheduled injuries is straightforward: multiply the weeks by the disability percentage by the PPD weekly rate (currently $670.92, capped at 55% of the state average weekly wage).

Unscheduled Injuries: Body as a Whole at 400 Weeks

Injuries to the back, neck, head, and internal organs are not on the schedule. These "unscheduled" injuries are rated as a percentage of disability to the body as a whole, with a maximum of 400 weeks — the highest week value in the Missouri system.

This distinction matters enormously. A 15% disability rating to the body as a whole at the current maximum PPD rate produces $40,255 in benefits (400 weeks x 15% x $670.92). The same 15% rating to a hand at wrist produces only $17,624 (175 weeks x 15% x $670.92). The body-as-a-whole designation roughly doubles the value of a claim compared to an upper extremity rating at the same percentage.

The Prevailing Factor Standard

Since the 2005 reforms (SB 1), Missouri requires that the work injury be the prevailing factor — the primary factor, not merely a contributing factor — in causing both the medical condition and the resulting disability. This heightened causation standard applies to all claims, including occupational diseases under Section 287.067.

What the Data Shows: Disability Ratings by Injury Type

Our entity extraction pipeline analyzed disability rating language across all 2,615 decisions. Of those, 799 decisions contained explicit disability percentage ratings that we could parse and categorize.

Back Injuries Dominate Body-as-a-Whole Ratings

Back injuries produced 187 parseable disability ratings — the largest single category. The data reveals a striking pattern:

| Rating Category | Count | Avg Disability % | Median % | Range | |----------------|-------|-------------------|----------|-------| | Body as a Whole | 159 (85.0%) | 23.8% | 20.0% | 0–100% | | Scheduled Member | 28 (15.0%) | 22.7% | 16.3% | 5–100% |

85% of all back injury disability ratings are body-as-a-whole awards. This is consistent with Missouri's statutory framework — the lumbar spine, cervical spine, and thoracic spine are all unscheduled injuries rated against the 400-week maximum. The 15% classified as scheduled member ratings likely involve cases where the back injury produced radiculopathy or other symptoms affecting a specific extremity, allowing a scheduled rating.

The distribution of body-as-a-whole percentages for back injuries clusters in predictable bands:

| Disability Band | Decisions | % of Total | |----------------|-----------|------------| | 1–10% | 31 | 19.5% | | 11–20% | 52 | 32.7% | | 21–30% | 38 | 23.9% | | 31–40% | 23 | 14.5% | | 41–50% | 8 | 5.0% | | 51–100% | 7 | 4.4% |

The median back injury disability rating of 20% to the body as a whole translates to 80 weeks of PPD benefits at the current maximum rate — approximately $53,674. The most common band (11–20%) covers the range from $29,370 to $53,674 in total PPD compensation.

Injury Types Ranked by Average Disability Percentage

Across all injury types with at least five rated decisions, the average disability percentages reveal which injuries produce the most substantial claims:

| Injury Type | Rated Decisions | Avg Disability % | Body-as-Whole % | |------------|----------------|-------------------|-----------------| | Multiple injuries | 7 | 47.5% | 85.7% | | Hip | 5 | 42.0% | 40.0% | | Motor vehicle accident | 5 | 31.4% | 100.0% | | Knee | 62 | 29.6% | 12.9% | | Shoulder | 62 | 28.4% | 22.6% | | Neck and shoulder | 5 | 27.4% | 60.0% | | Fall | 11 | 26.6% | 81.8% | | Neck | 9 | 24.7% | 88.9% | | Wrist | 9 | 24.7% | 11.1% | | Back | 187 | 23.6% | 85.0% | | Occupational disease | 113 | 23.6% | 57.5% | | Carpal tunnel | 45 | 18.9% | 26.7% | | Hearing loss | 6 | 17.2% | 83.3% | | Hernia | 5 | 9.5% | 100.0% |

Several patterns emerge from this data.

Neck injuries track heavily to body-as-a-whole ratings (88.9%), consistent with the cervical spine being an unscheduled injury. The average neck disability percentage of 24.7% is comparable to back injuries, though the sample size is smaller.

Knee and shoulder injuries have low body-as-a-whole rates (12.9% and 22.6% respectively) because they are scheduled injuries. A knee injury is rated against the 160-week maximum for the leg at or above the knee, not the 400-week body-as-a-whole maximum. This statutory distinction reduces the total compensation for equivalent disability percentages.

Occupational disease claims show a nearly even split between body-as-a-whole (57.5%) and scheduled member ratings (42.5%). This reflects the diversity of occupational diseases — some affect the respiratory system or other organs (unscheduled), while others like hearing loss or repetitive stress conditions may be rated against specific body parts.

Falls produce high body-as-a-whole rates (81.8%) because falls frequently injure the back or cause multiple-system trauma that affects the body globally rather than a single extremity.

Permanent Total Disability by Injury Type

Permanent total disability — lifetime weekly benefits — is the most consequential determination in workers' compensation. Our data identified 48 decisions involving PTD ratings:

| Injury Type | PTD Decisions | |------------|--------------| | Back | 16 | | Occupational disease | 6 | | Shoulder | 3 | | Knee | 3 | | Motor vehicle accident | 2 | | Fall | 2 | | Carpal tunnel | 2 | | All others | 14 |

Back injuries account for one-third of all PTD determinations. Under Section 287.200, PTD requires showing the employee cannot compete in the open labor market — no employer would reasonably hire the individual given their physical limitations, age, education, and work history. Back injuries, with their impact on lifting, bending, standing, and sitting, frequently satisfy this standard when combined with vocational factors.

Compensation Awarded by Injury Type

Our entity extraction captured explicit compensation amounts from 934 decisions. The median and average awards by injury type provide a market-rate benchmark for claim valuation:

| Injury Type | Awards | Average Award | Max Award | |------------|--------|---------------|-----------| | Multiple injuries | 6 | $66,254 | $101,906 | | Hip | 5 | $63,257 | $221,661 | | Motor vehicle accident | 8 | $41,529 | $165,460 | | Fall | 13 | $34,125 | $236,732 | | Occupational disease | 132 | $30,254 | $436,286 | | Back | 209 | $24,866 | $457,845 | | Knee | 64 | $24,816 | $156,195 | | Shoulder | 60 | $23,444 | $101,746 | | Carpal tunnel | 46 | $18,163 | $58,946 | | Ankle | 16 | $16,426 | $51,823 |

The wide ranges within each category underscore a critical point: the disability percentage, not the injury type alone, determines compensation. A 5% back injury and a 50% back injury are both "back injuries," but the compensation differs by an order of magnitude.

The occupational disease maximum of $436,286 and the back injury maximum of $457,845 reflect cases involving PTD or high-percentage body-as-a-whole ratings combined with favorable weekly rates.

The Attorneys and Law Firms Handling These Cases

Claimant-Side Attorneys

The attorneys representing injured workers most frequently in LIRC appeals:

| Attorney | Cases | |----------|-------| | Dean Christianson | 44 | | Randy Alberhasky | 28 | | Ray Gerritzen | 21 | | Jerry Kenter | 18 | | Harry J. Nichols | 21 | | Gary Matheny | 11 | | Patrick Platter | 10 | | Frank Eppright | 10 | | Ann Dalton | 10 | | Keith Yarwood | 9 |

Dean Christianson leads the claimant bar with 44 appearances across our dataset, followed by Randy Alberhasky with 28. These are practitioners who have developed significant expertise in the workers' compensation appeals process through repeated experience before the LIRC.

For injured workers, the concentration of cases among a relatively small group of attorneys reflects the specialized nature of workers' compensation practice. The attorneys who appear most frequently at the LIRC level have navigated the appeals process dozens of times and understand the commission's analytical framework.

Employer/Insurer-Side Attorneys

The defense bar in Missouri workers' compensation appeals is distributed more evenly, with no single attorney dominating:

| Attorney | Cases | |----------|-------| | Paul Huck | 10 | | Gregg Johnson | 10 | | Jerry Harmison | 9 | | Brian Fowler | 9 | | Maureen Cary | 8 | | Loretta Simon | 8 | | John P. Kafoury | 13 | | Kenneth Alexander | 7 | | Frank Rodman | 7 | | Patricia Musick | 7 |

The more even distribution on the defense side reflects the institutional nature of workers' compensation defense — large employers and insurance carriers distribute cases across multiple attorneys and firms rather than concentrating with a single practitioner.

The Second Injury Fund: A Narrowing Path

The Second Injury Fund under Section 287.220 historically provided an additional avenue for injured workers with preexisting disabilities to receive permanent total disability benefits. Since the 2013 amendments (HB 404), the Fund's scope has narrowed significantly.

To qualify, a worker must have a preexisting disability equaling at least 50 weeks of PPD compensation from one of four specified sources: military service, a prior workers' comp injury, a non-compensable condition that directly aggravates the new injury, or loss of a paired organ or extremity. The subsequent work injury must combine with that qualifying preexisting disability to produce permanent total disability.

Our data shows that back injuries — already the leading cause of PTD determinations — frequently involve preexisting degenerative conditions. Whether those conditions qualify under the post-2013 framework depends on precise medical documentation establishing the causal relationship between the preexisting condition and the aggravation caused by the work injury.

Validating the Data

The analysis in this article is derived from AI-assisted entity extraction across 2,615 LIRC decisions. To support independent verification, we provide two downloadable datasets:

Full Decision Dataset (CSV) — 2,615 decisions with slug, year, injury type, body part, outcome, employer, disability rating, compensation awarded, attorneys, judge, and lead physician
Disability Ratings Dataset (CSV) — 799 parsed disability ratings with injury type, body part, outcome, rating text, rating category (body as a whole vs. scheduled member), and extracted percentage

These datasets allow attorneys, researchers, and journalists to independently verify every statistic presented in this article. The underlying LIRC decisions are available in full text at our workers' comp decisions archive.

Strategic Implications

For Injured Workers

If you have sustained a back injury at work, the data confirms that your claim will almost certainly be evaluated as a body-as-a-whole disability against the 400-week maximum. The median rating of 20% translates to meaningful compensation, but achieving an accurate rating requires strong medical evidence connecting the workplace injury to your current condition under the prevailing factor standard.

The most significant variable is not whether you have a back injury — that is established by diagnosis. The most significant variable is the quality of the medical opinion establishing the disability percentage. A difference of 5 percentage points on a body-as-a-whole rating changes the claim value by approximately $13,418 at current rates.

For Practitioners

The data supports several case-evaluation principles. Back injuries and occupational diseases with body-as-a-whole ratings produce the highest total compensation because they access the 400-week maximum. Knee and shoulder injuries, despite higher average disability percentages (29.6% and 28.4% respectively), produce lower total awards because they are rated against shorter scheduled-member maximums. The strategic question in borderline cases is whether the evidence supports a body-as-a-whole rating rather than a scheduled-member rating.

For Employers

The compensation data reflects the full range of outcomes in contested cases. The averages should not be mistaken for expected values in any individual claim — the distributions are wide, and the outcome depends on medical evidence, the credibility of the claimant, and the quality of legal representation on both sides.

You can explore the complete dataset of LIRC decisions, including detailed entity breakdowns, at our workers' comp statistics dashboard.

Frequently Asked Questions

What is the maximum PPD benefit for a back injury in Missouri?

A 100% disability rating to the body as a whole at the current maximum PPD rate produces $268,368 in total benefits (400 weeks x 100% x $670.92/week). In practice, 100% body-as-a-whole ratings are rare outside permanent total disability determinations. The median back injury rating in our dataset is 20%, producing approximately $53,674 in PPD benefits at the current maximum rate.

How is "body as a whole" different from a scheduled injury?

Scheduled injuries (arms, legs, hands, feet, eyes, ears) have fixed week values in the statute — for example, 232 weeks for an arm at the shoulder. Unscheduled injuries (back, neck, head, internal organs) are rated against the body as a whole at 400 weeks. Because the week multiplier is higher, body-as-a-whole ratings produce more compensation at equivalent disability percentages.

Can a shoulder injury be rated as body as a whole?

In limited circumstances. Our data shows 22.6% of shoulder injury ratings were body-as-a-whole designations. This typically occurs when the shoulder injury produces complications affecting the cervical spine or causes systemic limitations that extend beyond the scheduled body part. The characterization of the injury can significantly affect the total claim value.

How reliable is the entity extraction data?

The entity data was extracted using Claude Haiku AI models analyzing the full text of each LIRC decision. AI extraction can misparse ambiguous language or miss entities in unusual formatting. We provide downloadable CSV files so that every statistic in this article can be independently verified against the source decisions. The full decision text is available at our decisions archive.

What is the Second Injury Fund and how has it changed?

The Second Injury Fund (Section 287.220) pays additional benefits when a new work injury combines with qualifying preexisting disabilities to produce permanent total disability. Since the 2013 amendments, qualifying for the Fund requires a preexisting disability of at least 50 weeks from specified sources. The narrowed eligibility criteria have significantly reduced Fund payouts compared to the pre-2013 era.

Legal Disclaimer

This article is for informational purposes only and does not constitute legal advice. The statistics presented are derived from AI-assisted analysis and should be independently verified for use in any legal proceeding. Every workers' compensation case is unique. Consult with a qualified attorney about your specific situation.

Insurance companies have teams of lawyers and actuaries calculating exactly what your claim is worth. Make sure your side has the same data advantage — call OTT Law at (314) 710-2740 for a free consultation.