The renal dysfunction scale
A 5-tier GFR-based ladder (100/80/60/30/0 percent), each tier requiring documentation for at least 3 consecutive months during the past 12 months.
- The scale was substantially rewritten to GFR-based criteria effective September 30, 2021, replacing an older BUN/creatinine/albuminuria-based scheme.
- GFR, estimated GFR (eGFR), and creatinine-based approximations of GFR are all accepted for evaluation purposes when calculated by a medical professional.
- The 100 percent tier can also be reached through regular routine dialysis or eligible kidney transplant recipient status, independent of the GFR number itself.
- The 0 percent tier requires a specific additional finding (blood cell casts, structural abnormalities, or an elevated albumin/creatinine ratio) alongside a GFR of 60-89 -- the GFR range alone is not enough.
Records to review: nephrology records; GFR lab results; dialysis treatment records; kidney transplant records.
Voiding dysfunction has 3 independent sub-scales
Urine leakage, urinary frequency, and obstructed voiding are 3 separate sub-scales, never a single uniform ladder -- only whichever particular condition actually applies is rated.
- Urine leakage is rated by how often absorbent materials or an appliance must be changed (60/40/20 percent).
- Urinary frequency is rated by daytime voiding interval or nighttime awakenings (40/20/10 percent).
- Obstructed voiding is rated by catheterization requirement or objective obstructive findings (30/10/0 percent).
- When more than one sub-scale is documented, the highest applicable tier governs -- this is a judgment call about which single measure best represents the overall voiding dysfunction, not a combination rule that adds the sub-scales together.
Records to review: urology records; voiding diary; uroflowmetry results; post-void residual measurements.
The urinary tract infection scale
A 3-tier ladder (30/10/0 percent) based on hospitalization frequency, drainage requirements, and suppressive drug therapy duration.
- The top tier (30 percent) is reached through drainage by stent or nephrostomy tube, more than 2 hospitalizations per year, or continuous intensive management.
- The middle tier (10 percent) requires 1 to 2 hospitalizations per year or 6 months or more of suppressive drug therapy.
- The floor tier (0 percent) still requires documented recurrent symptomatic infection and suppressive therapy under 6 months.
- If poor renal function results from the infection, it is rated as renal dysfunction instead of under this scale.
Records to review: hospital admission records; infectious disease or urology treatment records; prescription records for suppressive therapy.
Seven diagnosis codes dispatch under 'whichever is predominant'
DC 7504, 7516, 7527, 7529, 7542, 7545, and DC 7528's own residual clause all rate under whichever of two competing shared scales is predominant.
- DC 7504 (pyelonephritis) chooses between renal dysfunction and urinary tract infection.
- DC 7516 (bladder fistula), 7527 (prostate gland disorders), 7542 (neurogenic bladder), and 7545 (bladder diverticulum) each choose between voiding dysfunction and urinary tract infection.
- DC 7529 (benign neoplasm) chooses between voiding dysfunction and renal dysfunction.
- DC 7528 (malignant neoplasm), after its temporary 100 percent window ends with no local recurrence or metastasis, also chooses between voiding dysfunction and renal dysfunction for the residual -- the 7th and final confirmed instance.
- In every one of these 7 instances, which scale is predominant is asked as a direct fact -- it is never inferred from symptom severity or how much evidence happens to be documented for each scale.
Records to review: clinical documentation identifying the predominant finding; urology or nephrology specialist notes.
Section 4.115a's own governing paragraph: predominant-only dispatch, and separate evaluation under §4.14
Before any rating table, 4.115a's introductory paragraph states the general rule behind the 7 confirmed 'whichever is predominant' dispatch points, and a separate rule allowing genuinely distinct, non-overlapping genitourinary disabilities to be rated separately.
- The governing paragraph's exact text: 'Where diagnostic codes refer the decision maker to these specific areas of dysfunction, only the predominant area of dysfunction shall be considered for rating purposes. Distinct disabilities may be evaluated separately under this section, pursuant to § 4.14, if the symptoms do not overlap.'
- The predominant-only rule is 4.115a's own general principle -- it is the source of the 7 confirmed 'whichever is predominant' dispatch points elsewhere in this hub, not simply a pattern noticed across individual diagnosis codes.
- The separate-evaluation half of this rule is not currently computed by RatingScope: this hub does not determine whether two genitourinary findings' symptoms overlap, and does not rate more than one shared scale at once for a single diagnosis code.
- 38 CFR 4.14 generally prohibits rating the same disability, or the same manifestation of a disability, under more than one diagnostic code (pyramiding) -- 4.115a's cross-reference to it is what allows genuinely distinct, non-overlapping genitourinary disabilities to be evaluated separately instead of being forced through a single predominant scale.
Records to review: clinical documentation distinguishing overlapping vs. distinct genitourinary findings.
Hydronephrosis has its own independent 4-tier ladder
DC 7509 does not use the shared voiding or UTI scales at all -- severe cases dispatch to renal dysfunction, and non-severe cases use hydronephrosis's own colic-frequency scale.
- Severe hydronephrosis is rated as renal dysfunction directly.
- Non-severe hydronephrosis uses its own scale: frequent colic with infection (pyonephrosis) at 30 percent, frequent colic requiring catheter drainage at 20 percent, or only an occasional attack of colic (not infected, no catheter) at 10 percent.
- DC 7508 (Nephrolithiasis/Ureterolithiasis/Nephrocalcinosis) and DC 7511 (Ureter stricture) mostly dispatch to this same hydronephrosis-shaped ladder, except each carries its own override: a documented recurrent-stone-formation-treatment criterion resolves either DC 7508 or DC 7511 to a flat 30 percent instead.
- DC 7508's override text (procedures more than 2 times per year only) is narrower than DC 7511's (diet therapy, drug therapy, OR procedures more than 2 times per year) -- the two are textually distinct, not interchangeable.
Records to review: urology records documenting colic frequency, infection status, and catheter use; stone-treatment records.
Temporary 100 percent windows and minimum-evaluation floors
DC 7500, 7528, 7531, and 7532 each pair a temporary window or a minimum evaluation with the renal-dysfunction scale, though the exact interaction is not stated in the text for every code.
- DC 7500 (single kidney removal): the current text reads, in full, "Minimum evaluation 30. Or rate as renal dysfunction if there is nephritis, infection, or pathology of the other." The text does not say whether the 30 percent minimum continues to apply as a floor once the renal-dysfunction scale is triggered, or whether the renal-dysfunction scale fully replaces the minimum. RatingScope discloses both readings rather than asserting either as settled; a prior version of this disclosure stated the more-favorable reading as if it were the regulation's own language, which it is not.
- DC 7528 (malignant neoplasm): 100 percent applies following treatment, continuing with a mandatory VA examination at 6 months; if there has been no local recurrence or metastasis, the residual is rated as voiding dysfunction or renal dysfunction, whichever is predominant.
- DC 7531 (kidney transplant): 100 percent applies following transplant surgery, continuing with a mandatory VA examination 1 year after hospital discharge; thereafter, residuals are rated as renal dysfunction with a 30 percent minimum.
- DC 7532 (renal tubular disorders): the current text reads, in full, "Minimum rating for symptomatic condition 20. Or rate as renal dysfunction." The text does not say whether the 20 percent minimum continues to apply as a floor once the renal-dysfunction scale is triggered, or whether the renal-dysfunction scale fully replaces the minimum, the same genuinely unstated question already disclosed for DC 7500. RatingScope discloses both readings rather than asserting either as settled; a prior version of this disclosure stated the more-favorable reading as if it were the regulation's own language, which it is not. The 20 percent value itself does introduce a rating value that does not exist anywhere else in the standard renal-dysfunction ladder.
Records to review: operative records for kidney removal or transplant; oncology treatment and follow-up records; nephrology records for renal tubular disorders.
Kidney and genitourinary tuberculosis
DC 7505 and DC 7525 both dispatch tuberculosis findings to a separate infectious-disease formula for the active phase, then to §4.88c/§4.89's own time-and-floor mechanic, then to this hub's own residual scale, for the inactive phase.
- Active tuberculosis is rated a flat 100 percent under 38 CFR 4.88b, DC 6311's General Rating Formula for Infectious Diseases.
- DC 7505 and DC 7525 use identical cross-reference language for the inactive phase: 'Rate in accordance with §§ 4.88b or 4.89, whichever is appropriate' -- confirmed verbatim from 38 CFR 4.115b. Per RSCH-091, this printed '4.88b' is confirmed to be the same stale pre-1994 section-relabeling artifact already resolved for DC 7911 elsewhere in this hub, not a deliberate reference to the unrelated General Rating Formula for Infectious Diseases -- the veteran-facing rating mechanic these codes actually need is §4.88c or §4.89, matching DC 6010's own correctly-labeled citation in the Eye Conditions hub.
- Inactive tuberculosis is gated by §4.88c's own 1-year 100 percent floor (entitlement established after August 19, 1968) or §4.89's own 2-year 100 percent floor plus its 6-year and 11-year graduated 50/30 percent floors (entitlement on or before that date, a closed population) BEFORE landing on this hub's own already-built residual scale: renal dysfunction for DC 7505 (kidney tuberculosis), urinary tract infection for DC 7525 (tubercular epididymo-orchitis, prostatitis, urethritis, or orchitis). Corrected under BUG-152 -- earlier RatingScope behavior dispatched every inactive finding straight to the residual scale with no time gating at all, a live accuracy defect that could silently under-rate a veteran still inside a mandatory floor window.
- §4.89's own text states its graduated rating 'will not be combined with residuals of nonpulmonary tuberculosis unless the graduated rating and the rating for residual disability cover separate functional losses' -- RatingScope discloses this rather than auto-resolving it.
- DC 7525's non-tubercular branch (the more common case) rates as urinary tract infection directly, with no tuberculosis mechanism involved at all.
Records to review: infectious disease specialist records; tuberculosis treatment and activity-status records, including the date of inactivity and the entitlement-basis date.
Nephrosclerosis's hypertension and heart-disease branches are disclosed, not computed
DC 7507 rates according to whichever of 3 systems is predominant: renal dysfunction, hypertension, or heart disease, with an added elevation rule when the cardiovascular branch applies.
- This hub computes only the renal-dysfunction branch directly.
- Choosing hypertension or heart disease as predominant is disclosed as a redirect to the already-built Hypertension and Heart Conditions hubs -- RatingScope does not compute another hub's own rating from within this one.
- An additional rule applies specifically to the cardiovascular branches: if rated under the cardiovascular schedule, the percentage that would otherwise be assigned is elevated to the next higher evaluation.
- This elevation rule is a genuinely distinct complexity beyond the ordinary predominant-dispatch pattern used elsewhere in this hub, not simply another instance of it.
Records to review: cardiology records; nephrology records documenting predominant system.
Some diagnosis codes are flat ratings with no shared-scale involvement
DC 7520-7524 and 7543 are rated based on bilaterality or removal-extent facts only, never dispatching to the renal, voiding, or UTI scales.
- DC 7520 (penis removal, half or more) and DC 7521 (penis removal of glans) are flat 30 and 20 percent, respectively.
- DC 7522 (erectile dysfunction, with or without penile deformity) is a flat 0 percent, and also covers scarring or deformity of the penis under the same code.
- DC 7523 (testis atrophy) and DC 7543 (varicocele/hydrocele) are flat ratings based on bilaterality.
- DC 7524 (testis removal) carries one documented exception: removal of one testis as a service-connected injury or disease, with the remaining testis absent or nonfunctioning for reasons unrelated to service, is rated 30 percent -- the same as removal of both testes -- not 0 percent.
Records to review: urology or reproductive-organ examination records; operative records for removal or atrophy findings.