What Is the Almaraz/Guzman Doctrine in California?

The Almaraz/Guzman doctrine in California is a 2009 Workers’ Compensation Appeals Board en banc ruling that lets a physician reach outside the standard AMA Guides table for your injury and use any other chapter, table, or method within the Guides that more accurately captures your impairment. The practical payoff can be large: a worker whose standard rating lands at 14% might, with a well-supported alternative analysis, see that figure climb into a much higher tier of permanent disability payments.¹

What the Doctrine Actually Says

California requires evaluators to measure permanent impairment using the American Medical Association Guides to the Evaluation of Permanent Impairment, 5th Edition. For injuries before January 1, 2013, that mandate comes from Labor Code Section 4660;² for injuries on or after that date, Section 4660.1 adds a 1.4 adjustment multiplier to the whole person impairment figure.³

The two consolidated cases, Almaraz v. Environmental Recovery Services and Guzman v. Milpitas Unified School District, resolved a persistent problem: the “correct” table in the Guides sometimes produces a number that badly underrepresents what the worker actually lost. The WCAB answered that problem with four holdings.⁴

The rating schedule is only “prima facie evidence” under Labor Code Section 4660(c), so it is presumed correct but can be rebutted.
Whichever side disputes the scheduled rating carries the burden of proof by a preponderance of the evidence.
One way to rebut the schedule is to challenge a component of it, such as the whole person impairment number drawn from the AMA Guides.
A physician may use any chapter, table, or method within the Guides that most accurately reflects the impairment, but may not go outside the Guides.

That last point is the “four corners” limit. The evaluator can look to a gait-derangement analysis for a knee injury if it fits better than the standard knee table, but cannot invent a rating method or pull numbers from a different medical text.

The Standard You Have to Meet

Rebutting a standard rating is not automatic. You must show the scheduled number is “inequitable, disproportionate, and not a fair and accurate measure of the employee’s permanent disability,” a standard the WCAB drew from decades of California case law requiring that a rating be rationally related to the actual disability and provide just and fair compensation.¹

A general sense that the rating “feels low” will not do it. The physician has to point to specific clinical findings — measurable deficits in strength, range of motion, sensation, or functional capacity — that the standard table fails to capture, then identify an alternative table or method inside the Guides that does capture them, and explain why the analogy is medically sound. Judges who reject these opinions almost always do so because the report lacks that connective reasoning.

What a Report Needs to Contain

Any medical opinion offering an alternative rating has to qualify as substantial medical evidence. Under California case law that means a reasoned opinion based on reasonable medical probability, grounded in germane facts and an adequate examination, with the reasoning spelled out and not just the conclusion stated. Speculation, missing records, or incorrect legal theories sink the report.

In practice, a physician building an Almaraz/Guzman argument needs to do three things. First, perform the standard rating using the chapter and table that most directly applies, so there is a baseline number everyone agrees the Guides would otherwise produce. Skipping this step is a common mistake that gives judges an easy reason to reject the alternative rating.

Second, explain in clinical detail why that standard number fails to reflect the worker’s actual functional loss. This is where imaging, electrodiagnostic studies, and physical exam measurements get tied to specific shortcomings in the chosen table.

Third, identify the alternative chapter, table, or method inside the AMA Guides that better fits the impairment, and walk through the reasoning for the analogy. If a complex wrist injury is rated by analogy to upper-extremity nerve impairment, the report has to explain why the functional deficits mirror nerve damage more closely than the standard joint-range tables. California regulations also require the report to include findings on examination, a diagnosis, the reasons for the opinion, and a description of the disability with a complete evaluation. A report that skips any of these steps is not automatically inadmissible, but the judge will weigh the deficiency when assessing the evidence.⁵

Both Agreed Medical Evaluators and panel Qualified Medical Evaluators can provide Almaraz/Guzman opinions. When they do, the Disability Evaluation Unit processes both the standard AMA Guides rating and the alternative rating, so the judge has both numbers available.⁶

When an Analogy Rating Actually Helps

Almaraz/Guzman matters most where the standard table is a poor fit for the clinical picture. Common examples include:

Complex Regional Pain Syndrome cases where the primary extremity tables badly underrepresent whole-limb or whole-body functional loss, chronic pain, and muscle wasting. Evaluators often turn to nerve-impairment tables or other functional-loss measurements within the Guides.
Multi-level spinal injuries where the DRE method, applied segment by segment, misses the cumulative impact of herniations at multiple levels combined with radiculopathy. Range-of-motion methods or combined neurological tables can produce a rating closer to reality.
Severe orthopedic injuries that generate secondary conditions such as gait dysfunction, chronic pain, or loss of grip strength that the primary body-part chapter does not weigh.

One significant boundary applies to injuries on or after January 1, 2013. Labor Code Section 4660.1(c) prohibits increased impairment ratings for sleep dysfunction, sexual dysfunction, or psychiatric disorders arising from a compensable physical injury. The only exceptions are psychiatric injuries from being a victim of or directly exposed to a violent act, or injuries classified as catastrophic such as loss of a limb, paralysis, severe burns, or severe head trauma.³ Treatment for those conditions remains available, but the impairment number cannot be boosted to account for them in most situations, and an Almaraz/Guzman analogy cannot be used to get around that statutory bar.

Why the Doctrine Is Worth Fighting For

California’s permanent disability indemnity schedule is tiered, and the per-point value climbs steeply at higher disability percentages. For injuries on or after January 1, 2013, the weeks of payment per percentage point run as follows:⁷

0.25% to 9.75%: 3 weeks per percentage point
10% to 14.75%: 4 weeks
15% to 24.75%: 5 weeks
25% to 29.75%: 6 weeks
30% to 49.75%: 7 weeks
50% to 69.75%: 8 weeks
70% to 99.75%: 16 weeks

The tiers stack. A worker rated at 30% does not get 7 weeks for all 30 points; the first 9.75 points pay 3 weeks each, the next 5 points pay 4 weeks each, and so on. Each week of payment equals two-thirds of average weekly earnings, subject to statutory minimums and maximums that vary by date of injury.

This is why an Almaraz/Guzman analysis can change the economics of a case so dramatically. Pushing a rating from 14% to 25% does not just add 11 percentage points; it moves those additional points into higher-paying tiers. Separately, if the employer does not offer modified or alternative work within 60 days of the disability becoming permanent and stationary, remaining payments go up by 15%; if the employer does make such an offer, they drop by 15%.⁷

When multiple body parts are involved, the individual whole person impairment values are not simply added. The AMA Guides’ Combined Values Chart produces a figure lower than straight addition: the two highest values are combined first, that result is combined with the next highest, and so on, reflecting the principle that losing function in one area has less marginal impact once function has already been lost elsewhere.

Where Almaraz/Guzman Fits Alongside Ogilvie

Almaraz/Guzman is not the only way to rebut a scheduled rating. A companion en banc decision issued the same month, Ogilvie v. Workers’ Compensation Appeals Board, allows a worker to challenge the Diminished Future Earning Capacity adjustment by showing that an individualized earnings-loss analysis better reflects future earning capacity than the scheduled FEC rank.

The two doctrines attack different components. Almaraz/Guzman targets the whole person impairment itself, the medical measurement. Ogilvie targets the economic modifier applied after the WPI is set. For older cases, attorneys sometimes run both arguments at once. For injuries on or after January 1, 2013, Ogilvie carries less weight because the variable FEC rank was replaced by the flat 1.4 multiplier, but Almaraz/Guzman remains fully available for challenging the underlying WPI.

Scope and Staying Power

Almaraz/Guzman is binding on all California Workers’ Compensation Appeals Board panels and workers’ compensation judges. It interprets California Labor Code Section 4660 and California Administrative Director regulations, and has no application in other states’ workers’ compensation systems, which have their own rules on deviating from the AMA Guides.⁴

The doctrine survived the 2012 SB 863 reforms. Those reforms introduced the 1.4 multiplier and restricted ratings for sleep, sexual, and psychiatric conditions, but they left the rebuttability of the schedule intact. The core principle, that prima facie evidence is not conclusive evidence, is embedded in the statutory language Section 4660.1 preserved, and Almaraz/Guzman still governs how that rebuttal is argued today.

1
California Department of Industrial Relations. Almaraz v. Environmental Recovery Services / Guzman v. Milpitas Unified School District – En Banc Decision
2
California Legislative Information. California Code LAB 4660 – Determination of Percentages of Permanent Disability
3
California Legislative Information. California Labor Code 4660.1
4
California Department of Industrial Relations. Almaraz v. Environmental Recovery Services / Guzman v. Milpitas Unified School District – September 2009 En Banc Decision
5
Department of Industrial Relations. California Code of Regulations Title 8 Section 10682 – Physicians Reports as Evidence
6
California Department of Industrial Relations. DWC FAQs on the PDRS for Practitioners
7
California Legislative Information. California Code LAB 4658 – Permanent Disability Indemnity