Intel File RTC-007 // Rating Operations
Ratings & Diagnostic Codes Field Guide
Service connection answers whether VA recognizes the disability. The rating answers a different question: how the documented disability fits VA's rating schedule. The percentage is not a pain thermometer, a character judgment, or a reward for having a spectacularly bad week.
A diagnosis does not tell you the percentage by itself. Find the diagnostic code, read the actual rating criteria, then compare the medical and functional evidence with what the regulation requires. The schedule is rude enough to demand specifics.
Rating mission
The percentage is a schedule evaluation—not VA judging your toughness.
VA's Schedule for Rating Disabilities is in 38 CFR Part 4. Under § 4.1, the percentage ratings are intended to represent, as far as practicably can be determined, the average impairment in earning capacity resulting from service-connected disease and injury and their residual conditions.
That is why two veterans with the same diagnosis can receive different evaluations. The diagnosis identifies the condition. The rating criteria and the evidence establish the level of disability VA can assign under the schedule.
What condition or residual disability is actually service connected?
Which diagnostic code or rating formula is VA using to evaluate it?
What findings separate 0%, 10%, 30%, 50%, or other available levels?
What medical and functional evidence proves where the disability fits?
If VA grants service connection but the percentage looks wrong, first identify the diagnostic code and the criteria VA says it applied. A disagreement about the percentage is easier to analyze when you know which rule produced it.
Code identification
The diagnostic code is the grading sheet VA forgot to make pleasant.
Part 4 is divided into body systems and contains diagnostic codes for listed diseases, injuries, and residuals. The code points to the criteria used to assign the evaluation. Do not assume the name of the service-connected condition and the exact wording of the diagnostic code will always match one-for-one.
The schedule contains a specific code or formula.
Read that code and any notes, definitions, special instructions, or general rating formula that applies to it. Those notes can matter just as much as the percentage lines themselves.
Not every condition has its own listing.
Under 38 CFR § 4.20, an unlisted condition may be rated under a closely related disease or injury when the functions affected, anatomical location, and symptom pattern are closely analogous. The rule does not authorize a random "closest percentage."
Criteria analysis
Your symptoms do not grade themselves. Read the actual language.
Some diagnostic codes use measurements. Others use frequency of episodes, treatment requirements, occupational and social impairment, functional loss, or combinations of findings. The evidence that matters depends on the code.
- Read every percentage level, not just the percentage you hope to receive.
- Read the notes and definitions attached to the diagnostic code or rating formula.
- Compare objective findings and functional effects with the exact criteria.
- Use current criteria rather than an old screenshot, forum post, or outdated rating chart.
- Assume severity labels like “severe” automatically translate to a particular percentage.
- Count symptoms twice when the schedule says they belong in one evaluation.
- Ignore a required measurement because another symptom sounds more dramatic.
- Assume every symptom must appear word-for-word if the applicable rule evaluates the overall disability picture.
What if the disability seems between two evaluations?
38 CFR § 4.7 says that when there is a question as to which of two evaluations should apply, the higher evaluation is assigned when the disability picture more nearly approximates the criteria for that rating. Otherwise, the lower evaluation is assigned. That is not a free “benefit-of-the-doubt percentage bump”; the evidence still has to support the closer disability picture.
Functional impairment still matters.
Section 4.10 directs evaluations toward the ability of the body or psyche to function under the ordinary conditions of daily life, including employment. For many musculoskeletal ratings, other Part 4 rules also require attention to functional loss, painful motion, weakness, fatigability, or other effects. Always read the rules that accompany the body system you are evaluating.
Separate evaluations
VA does not pay by diagnosis count.
Under 38 CFR § 4.14, VA is supposed to avoid evaluating the same disability or the same manifestation under multiple diagnoses. This is commonly called pyramiding.
Same impairment, different labels.
Two diagnoses may describe the same functional problem. If the same manifestation is being used to support both evaluations, separate ratings may be prohibited unless the rating schedule specifically authorizes them.
Separate impairment may support separate evaluation.
The analysis is not simply “same body part = one rating.” Different, non-overlapping manifestations can sometimes be evaluated separately when the applicable rating rules allow it. The specific diagnostic codes and symptoms control the answer.
Build it around identifiable disabilities and manifestations. If two claimed conditions produce the same compensable manifestation, adding another diagnosis may not create another percentage.
VA Math
Individual ratings combine because ordinary addition was apparently too peaceful.
VA uses the Combined Ratings Table in 38 CFR § 4.25. Ratings are arranged from highest to lowest and combined against the remaining efficiency of the whole person. That is why 50% plus 30% does not equal 80%.
50% + 30% = 65% before final rounding.
After a 50% disability, 50% efficiency remains. A 30% disability acts on that remaining 50%, reducing it by another 15 points. The result is 65% disabled. Under the combined-rating rule, that final degree converts to 70%.
Use VA Math to model the sequence, but use the regulation or VA's own table when you need to verify the official calculation.
Paired extremities
The bilateral factor is not a free ten-point field promotion.
Under 38 CFR § 4.26, qualifying compensable disabilities affecting both arms, both legs, or paired skeletal muscles are first combined. VA then adds 10% of that combined bilateral value before proceeding with the rest of the rating calculation. That is 10% of a number—not 10 percentage points added to the veteran's final rating.
There must be qualifying disability on both sides of a paired set.
The rule requires partial disability of compensable degree in each paired extremity or muscle group.
The bilateral ratings are combined before the 10% factor is added.
The bilateral result is treated as one value for the remaining combined-rating sequence.
There is a veteran-favorable exception.
Current § 4.26(d) says that if including one or more bilateral disabilities in the bilateral-factor calculation would produce a lower combined evaluation than leaving them out and combining them separately, VA removes the necessary disability or disabilities from the bilateral calculation to achieve the more favorable combined evaluation.
When VACB's VA Math calculator applies the bilateral factor, the result should agree with § 4.25 and the current § 4.26 procedure, including the favorable-result exception. If the calculator and the regulation disagree, trust the regulation and flag the tool.
Verify it yourself
Source rack
Ratings change when the rating schedule changes. Pull the current source before relying on an old chart or somebody's memory.