What every injured worker needs to know before accepting a PD rating

 

You’ve been through surgery, months of physical therapy, and more doctor appointments than you can count. Your treating physician has finally declared you Permanent and Stationary — meaning your condition has reached Maximum Medical Improvement (MMI) and is unlikely to change. Now comes the phase that confuses — and often shortchanges — the most injured workers in California: the permanent disability rating.

 

Insurance adjusters count on you not understanding how this works. This post breaks it down clearly — because your rating directly determines how much money you receive, and you deserve to know exactly how it’s calculated.

 

First: What Does ‘Permanent and Stationary’ Actually Mean?

When your treating physician (or a QME/AME) determines that your condition is Permanent and Stationary (P&S), it means your injury is as healed as it’s going to get. You may still have ongoing pain, limited range of motion, or functional restrictions — but the condition is now considered stable.

 

At this point, your treating doctor issues a P&S report — also called a final medical report — that includes two critical elements:

 

• Work restrictions (what you can and cannot do going forward)
• An impairment rating under the AMA Guides to the Evaluation of Permanent Impairment, 5th Edition

 

That impairment rating is the foundation of your permanent disability calculation under California Labor Code §4660.

 

How California Calculates Permanent Disability

California’s PD rating system is multi-step and can be complex. Here’s how it works:

 

The California PD Rating Formula 1.  Whole Person Impairment (WPI) — assigned by the physician using the AMA Guides 2.  Adjusted for occupation — different jobs carry different risk weights (e.g., a roofer vs. an accountant with a back injury) 3.  Adjusted for age at time of injury — older workers receive slightly higher ratings 4.  Final Permanent Disability percentage — expressed as a number from 0% to 100%   This final percentage is then converted to a dollar value using the PD weekly rate schedule set forth in California Labor Code §4453 and the WCAB Permanent Disability Rating Schedule (PDRS).

 

What Is the PD Weekly Rate — and How Long Do Payments Last?

Once your final PD percentage is established, it determines two things: the weekly payment rate and the number of weeks of payments. The weekly rate depends on your average weekly wages (AWW) at the time of injury, subject to statutory minimum and maximum caps under LC §4453.

 

For injuries occurring on or after January 1, 2014, the maximum PD weekly rate is $290.00 per week. The number of weeks of PD is determined by your final percentage — for example, a 20% PD rating corresponds to a specific number of weeks of payments under the PDRS conversion table.

 

A 100% PD rating — known as Total Permanent Disability — entitles the injured worker to lifetime payments at the TD rate under LC §4659(b). These cases are rare but do occur with catastrophic injuries.

 

The Role of Apportionment — and Why It Can Reduce Your Rating

One of the most hotly contested issues in California workers’ compensation is apportionment. Under LC §4663 and §4664, the insurance company has the right to argue that a portion of your permanent disability is caused by prior injuries, pre-existing conditions, or non-industrial factors — and reduce your award accordingly.

 

For example: if you have a 40% PD rating but the defense doctor says 15% of it is from a pre-existing degenerative condition, they may argue your industrial PD is only 25%.

 

⚠️ Apportionment Is Where Carriers Take the Most Money Off the Table Defense QMEs and AMEs routinely over-apportion to pre-existing conditions — often with minimal medical justification. An experienced workers’ comp attorney can challenge these opinions through supplemental reports, cross-examination, and rebuttal evidence. Never accept an apportionment finding without legal review.

 

What About Future Medical Care?

Permanent disability payments are separate from your right to future medical treatment. Even after a PD award is issued, you typically retain the right to ongoing medical care for your industrial injury under LC §4600 — including doctor visits, medications, and procedures that become necessary in the future.

 

This distinction matters enormously when evaluating any settlement offer. A Compromise and Release (C&R) that closes out future medical care should command a significantly higher dollar amount than a Stipulated Award that leaves future medical open. (We cover this in detail in Post 8.)

 

Can You Dispute the Rating?

Absolutely — and you often should. If the insurance company’s QME assigns a rating you believe is too low, there are several avenues to challenge it:

 

• Request a Agreed Medical Evaluator (AME) if represented — a neutral physician both sides agree on
• File a Declaration of Readiness (DOR) to proceed to a WCAB hearing on the PD issue
• Challenge apportionment findings with supplemental medical evidence
• Argue the treating physician’s report over the defense QME where the evidence supports it

 

Under California law, the treating physician’s opinion is entitled to weight — it is not automatically trumped by the insurance company’s QME. The WCAB evaluates the totality of the medical evidence.

 

Key Legal Authorities on Permanent Disability • LC §4660 — Permanent disability rating using AMA Guides (5th Ed.) and PDRS • LC §4453 — PD weekly rate calculation tied to average weekly wages • LC §4659 — Total permanent disability; lifetime benefits at TD rate • LC §4663 — Apportionment of permanent disability to causation • LC §4664 — Presumption of prior awards; apportionment to prior disability • LC §4600 — Right to future medical treatment after PD award • 8 CCR §§9805–9810 — Permanent Disability Rating Schedule (PDRS)

 

The Bottom Line

Your permanent disability rating is not a formality. It is a calculated number that directly controls how much money you receive for the rest of your working life. Insurance carriers deploy experienced defense attorneys and hand-picked QMEs to minimize it. You deserve someone equally experienced fighting on your side.

 

At the Law Offices of Dr. Peter M. Schaeffer, we have handled over 3,000 workers’ compensation cases in California over 30 years. We know how PD ratings are built — and how they get manipulated. We fight back.