Listing 4.06 Symptomatic Congenital Heart Disease in 2026: How Cyanosis With Hematocrit 55 or PO2 60, Eisenmenger Physiology at 5 METs, or Pulmonary Systolic Pressure 70 Percent of Systemic Meets the Rule
If you were born with a heart defect and now live with cyanosis, exercise intolerance, or pulmonary hypertension, Listing 4.06 is the fastest path to SSDI. It is one of the shortest listings in the Blue Book, but the medical thresholds are precise, and the documentation trail decides your case. This is the practical, verbatim breakdown for 2026, including what your cardiologist needs on the record, how the paths interact, and what happens when your defect is repaired but symptoms persist.
Congenital heart disease covers a wide catalog of anatomic conditions present at birth. Tetralogy of Fallot, transposition of the great arteries, single ventricle after Fontan, hypoplastic left heart, atrial septal defect with Eisenmenger physiology, ventricular septal defect with pulmonary vascular obstruction, coarctation of the aorta, pulmonary atresia, and Ebstein anomaly all fall under this umbrella. Adults with repaired congenital lesions who still have residual dysfunction are eligible under 4.06 or, when the picture is dominated by heart failure or recurrent arrhythmias, under 4.02 or 4.05 instead.
The Verbatim Rule of Listing 4.06
Here is the exact text from the SSA Blue Book, section 4.06 of 20 CFR Part 404 Subpart P Appendix 1, as it reads in 2026.
4.06 Symptomatic congenital heart disease (cyanotic or acyanotic), documented by appropriate medically acceptable imaging (see 4.00A3d) or cardiac catheterization, with one of the following:
A. Cyanosis at rest, and:
1. Hematocrit of 55 percent or greater; or
2. Arterial O2 saturation of less than 90 percent in room air, or resting arterial PO2 of 60 Torr or less.
OR
B. Intermittent right-to-left shunting resulting in cyanosis on exertion (e.g., Eisenmenger's physiology) and with arterial PO2 of 60 Torr or less at a workload equivalent to 5 METs or less.
OR
C. Secondary pulmonary vascular obstructive disease with pulmonary arterial systolic pressure elevated to at least 70 percent of the systemic arterial systolic pressure.
Three paths. One diagnosis anchor. That is the whole rule. If your record satisfies the anchor and any one path, SSA is required to grant your claim at Step 3 of the sequential evaluation.
The Diagnosis Anchor: Imaging or Cath
Before SSA looks at cyanosis or pulmonary pressures, your file has to prove you actually have congenital heart disease. The rule accepts two evidence sources: appropriate medically acceptable imaging under section 4.00A3d, or cardiac catheterization.
Appropriate imaging usually means a transthoracic echocardiogram with color Doppler that shows the anatomic lesion, a cardiac MRI that maps the defect and quantifies ventricular size and function, or a chest CT with contrast. If you had surgery, the operative report and post-op imaging count as documentation of the underlying defect. If the defect is Eisenmenger physiology from an unrepaired shunt, right heart catheterization is often already on file because it is needed to measure pulmonary artery pressures.
You do not need a repeat scan every year. SSA looks for anatomic proof that the defect exists. The functional evidence that meets Path A, B, or C is what proves the current severity.
Path A: Cyanosis at Rest
Path A is the most straightforward and the most common winning path for adults with unrepaired or palliated cyanotic defects. It has two sub-paths, and you only need one.
4.06A1 hematocrit path. Cyanosis at rest plus a hematocrit of 55 percent or greater. Chronic hypoxemia drives the bone marrow to overproduce red cells. Erythrocytosis with hematocrit at or above 55 is a bright-line objective marker that the body is compensating for low oxygen. A single lab value that clears 55 is enough, but SSA looks better on cases where two or three values across the claim window show the same picture.
4.06A2 saturation path. Cyanosis at rest plus one of the following: arterial O2 saturation less than 90 percent in room air, or resting arterial PO2 of 60 Torr or less. Pulse oximetry counts for the saturation reading. Arterial blood gas is the gold standard for the PO2 number. If your saturation was 88 percent on room air at your last cardiology visit, that satisfies the path. If your ABG came back with PO2 of 58 Torr, same result.
The word "cyanosis" is not a lab value. It means visible bluish discoloration of the lips, nail beds, or skin caused by low oxygen. Your cardiologist has to describe it on the exam note. A physical exam finding of "central cyanosis noted at rest" or "peripheral cyanosis with clubbing" is what SSA looks for. Photographs of the exam are unusual but not prohibited.
Path B: Eisenmenger Physiology on Exertion
Path B captures people whose defect creates a right-to-left shunt only under stress. At rest they may look pink and feel fine. When they walk or climb stairs, pulmonary pressures spike, blood shunts across the shunt from right to left, and oxygenation crashes.
The rule spells out two coincident findings: arterial PO2 of 60 Torr or less at a workload equivalent to 5 METs or less. The 5 METs threshold is the same one SSA uses across the cardiovascular listings. It represents light activity like slow walking on a flat surface, taking out the trash, or making the bed. If you cannot get past 5 METs without oxygenation dropping to 60 Torr, that is a work-limiting deficit.
Eisenmenger physiology is the classic example the rule names. An unrepaired ventricular septal defect, atrial septal defect, or patent ductus arteriosus that has been present long enough to remodel the pulmonary vasculature creates pulmonary hypertension. As pulmonary resistance rises above systemic resistance, the original left-to-right shunt reverses. Any exercise or vasodilation event pushes deoxygenated blood back into the systemic circulation.
Documentation for Path B usually comes from a cardiopulmonary exercise test (CPET) with continuous ABG or arterial line monitoring. Some centers use ear-lobe ABG or transcutaneous CO2 monitoring for less invasive tracking. The record needs a specific PO2 or SpO2 number tied to a specific workload in METs.
Path C: Secondary Pulmonary Vascular Obstructive Disease
Path C is the ratio path. It does not care about your resting cyanosis or exercise oxygenation. It looks at one number: pulmonary arterial systolic pressure divided by systemic arterial systolic pressure. If that ratio hits 0.70 or higher, you meet the rule.
Example. Your right heart cath measured pulmonary artery systolic pressure at 78 mm Hg. Your brachial cuff at the same visit was 108 mm Hg systemic systolic. Ratio: 78 divided by 108 equals 0.72. That clears the 70 percent bar. Path C is satisfied regardless of what your saturation or hematocrit look like.
Right heart cath is the reference standard for pulmonary artery pressures. Echocardiographic estimates from tricuspid regurgitation jet velocity are accepted when cath is not clinically indicated, but the report needs to state the estimated pulmonary artery systolic pressure and the method used. SSA disability adjudicators do not require you to undergo cath just to prove disability. If your cardiologist has echo estimates on file with clear methodology, that is enough.
What Happens When 4.06 Does Not Fit
Section 4.00E of the Blue Book routes your congenital heart disease claim to 4.02 (chronic heart failure) if you have ventricular dysfunction with the required imaging thresholds, or to 4.05 (recurrent arrhythmias) if the picture is dominated by symptomatic arrhythmias with syncope or near-syncope. You can meet more than one listing. Adjudicators are allowed to grant on whichever fits best.
If none of the listings meet, SSA moves to Step 4 and Step 5 of the sequential evaluation. This is the RFC stage. Your cardiologist writes a functional assessment describing what you can lift, how far you can walk, how much time you can sit or stand, and how many days a month you would be off work. For adults with symptomatic congenital heart disease, the RFC picture is usually less than sedentary. Someone who cannot sustain 5 METs cannot sustain the walking, standing, or lifting demands of sedentary work as SSA defines it.
The vocational grid rules under 20 CFR Part 404 Subpart P Appendix 2 direct a finding of disabled when a person over 50 with sedentary RFC has no transferable skills or has a history of only unskilled or semi-skilled work. Grid 201.14 and 201.06 are the ones your representative should quote by number.
Documentation Playbook
These are the five records that carry the most weight for a 4.06 claim.
- Anatomic imaging. Echo report, cardiac MRI, or CT with contrast that names the defect. Or the cath report if catheterization documented the anatomy.
- Physical exam notes. Cardiology notes describing cyanosis, clubbing, exercise intolerance, or right heart strain findings.
- Lab values. CBC showing hematocrit at or above 55. ABG showing PO2 at or below 60 Torr. Or serial pulse ox showing SpO2 under 90 percent on room air.
- CPET or 6MWT. If Path B is your route, the record needs oxygenation numbers tied to workload in METs.
- Right heart cath or echo estimate. Path C requires the pulmonary artery systolic pressure with a comparison against systemic systolic.
Worked Case: Sarah, 44, Boston MA, Tetralogy of Fallot With Late Cyanosis
Sarah had a full Tetralogy of Fallot repair at age 3 in 1985. She lived normally through her twenties and thirties, working as a paralegal. In 2024 she started noticing air hunger climbing stairs. By 2025 she was blue-lipped after light exertion and dizzy when she stood up too fast.
Cardiac MRI in early 2026 showed severe pulmonary regurgitation with right ventricular dilation. Right heart cath measured pulmonary artery systolic pressure at 62 mm Hg against a systemic systolic of 118 mm Hg. Ratio: 0.53. Not Path C.
But her hematocrit came in at 57 percent on the same visit. Her SpO2 on room air was 87 percent. Her cardiologist's exam note documented "cyanosis of the nail beds and central cyanosis on lip inspection at rest, no supplemental oxygen at the time of exam." That is Path A. Both A1 (hematocrit 57) and A2 (SpO2 87) are satisfied by the same record.
Sarah applied in April 2026 with an established onset date of March 15, 2026, the date of her cardiology note. DDS approved at Step 3 in 71 days. Retroactive back pay was calculated to her onset. Her Medicare eligibility date is August 2028, 29 months after onset. See if you qualify by reading our See If You Qualify intake page or Massachusetts state page.
Worked Case: David, 38, Houston TX, Unrepaired VSD With Eisenmenger
David was born in 1988 in a rural part of Mexico. His moderate ventricular septal defect was not repaired in childhood because the family could not afford surgery. He grew up with progressive exercise intolerance. By his mid-twenties his pulmonary vascular resistance had risen high enough to reverse the shunt. Adult cardiology called it Eisenmenger physiology.
David worked construction in Texas until 2025, when he collapsed on a job site. Emergency ABG showed PO2 of 54 Torr. Six-minute walk test at his follow-up cardiology visit lasted 90 seconds before termination for oxygen desaturation to 78 percent. Estimated workload was under 3 METs. His cath report from three years earlier already documented pulmonary artery systolic at 82 mm Hg against systemic 122 mm Hg. Ratio: 0.67, just below Path C threshold.
But Path B was clearly met. PO2 54 Torr at a workload well under 5 METs on the CPET. His cardiologist wrote a one-page opinion letter tying it together. DDS approved at Step 3 in 58 days.
David's monthly SSDI benefit at his PIA was $1,894. His attorney's fee at the 25 percent cap on 14 months of back pay was capped at $6,629 (25 percent of $26,516). See our Texas state page or start with See If You Qualify.
Common Mistakes That Slow 4.06 Claims
Three errors show up repeatedly in denials that end up reversed on appeal.
Missing anatomic proof. Cardiologists know the diagnosis is in the chart, but the file sent to DDS often lacks the actual imaging report. The consultative examiner shrugs and denies. Fix: your representative or you should pull the echo, MRI, or cath report and submit it directly with a two-line cover letter naming the defect.
Cyanosis undocumented. The lab values may be there, but the exam note never uses the word cyanosis. DDS then argues Path A is not met because cyanosis at rest is not established. Fix: ask your cardiologist to add a physical exam note that describes what they see on inspection.
Pulmonary pressure without a matched systemic reading. Path C needs a ratio. If the cath report shows pulmonary artery pressures but no systemic blood pressure at the same time, DDS cannot calculate the ratio. Fix: the anesthesia record from the cath usually captures systemic BP throughout the procedure. Submit both.
How This Listing Interacts With Other Rules
Adults with congenital heart disease often have overlapping conditions. Here is the routing.
| Presentation | Primary listing | Notes |
|---|---|---|
| CHD with cyanosis and hematocrit 55+ | 4.06A | Fastest path |
| CHD with Eisenmenger physiology | 4.06B or 4.06C | Depends on cath vs CPET evidence |
| CHD with EF 30 or less | 4.02 | Chronic heart failure path |
| CHD with recurrent syncope from arrhythmia | 4.05 | Coincident Holter documentation required |
| CHD post-Fontan with liver failure | 4.06 plus 5.05 | Two listings can both meet |
| CHD with pulmonary artery pressure over 40 mm Hg | 3.09 (cor pulmonale) | If primarily respiratory picture |
Not sure which path your case fits?
Our intake form checks your medical record against every route under 4.06 and its sister listings. It takes about 4 minutes.
See If You QualifyTiming and Back Pay
SSDI back pay is calculated from the established onset date, minus the 5-month waiting period. For someone approved in July 2026 with an onset date of January 1, 2025, that is 12 months of retroactive benefits (June 2025 through May 2026 payable, then ongoing). If you had a prior denial that was reopened, you may reach even further back under 20 CFR 404.987.
SSI is capped at back pay to the application filing date. There is no waiting period for SSI, but the resource limits (2,000 for individuals, 3,000 for couples) and the 1,003 dollar 2026 federal benefit rate structure the maximum monthly payment. Many adults with congenital heart disease qualify for both concurrent SSDI and SSI in the first year while their SSDI amount is still below the SSI FBR.
Medicare Timing After 4.06 Approval
Medicare Part A eligibility kicks in 24 months after the first SSDI cash benefit month, which is the 5-month waiting period plus 24 months, or 29 months from established onset date. For adults approved under 4.06, this timing matters because congenital heart disease often requires ongoing cardiology, imaging, and sometimes surgery. A 29-month wait means gap coverage matters. Medicaid, ACA marketplace plans, and hospital charity care are the three bridges most claimants use.
Section-by-Section Frequently Asked Questions
Does a repaired defect still qualify under 4.06?
Yes. Repair does not disqualify you. The rule looks at symptoms and objective findings today. If your surgery from decades ago fixed the anatomy but you now have late-onset cyanosis, pulmonary hypertension, or Eisenmenger physiology, you meet the rule the same way as an unrepaired case.
Can pulse oximetry replace an ABG for Path A?
Yes for the saturation prong. The rule accepts room-air SpO2 under 90 percent as satisfying 4.06A2. ABG PO2 of 60 Torr or less is the alternative. Either one works.
What if my hematocrit is 54?
Path A1 requires 55 or greater. A hematocrit of 54 does not meet Path A1. It may still support Path A2 if your saturation or PO2 hits the threshold. It also supports Path B or C if the exercise or pressure evidence is there.
How many METs is 5 METs?
Five METs equals five times your resting metabolic rate. In practical terms it is roughly the equivalent of light housework, walking 2.5 to 3 mph on flat ground, or slow bicycle riding under 10 mph. Failing at 5 METs means you cannot complete these tasks without symptoms.
How is pulmonary artery systolic pressure measured for Path C?
Right heart cath is the reference standard. Echocardiography with tricuspid regurgitation jet velocity is accepted when cath is not clinically indicated. Either method must be reported with the numeric value and the calculation method.
Can I combine cardiac and mental health limitations for RFC?
Yes. If the listings do not meet, SSA is required to combine all impairments at the RFC stage. Depression, anxiety, or cognitive limits from prolonged hypoxemia can be combined with your cardiac limits under section 12.04, 12.06, or the RFC narrative.
Does congenital heart disease need to be present since birth?
By definition yes. Congenital means present at birth. However, symptoms can appear at any age. Someone whose atrial septal defect went undetected until age 45 still has congenital heart disease and can qualify under 4.06.
Next Steps if You Think Path A, B, or C Fits
Pull your last two years of cardiology records. Look for hematocrit values, saturation readings, ABG results, cath report, echo, or MRI. Match them against the three paths above. If any one path is satisfied on paper, you have a listing-level case.
If the record has gaps, ask your cardiologist for either the missing lab or a functional letter that describes what you can and cannot do. Then file. Do not wait for perfect records. SSA develops the record after you apply. Filing preserves your onset date and starts the clock.
Our intake page walks through every path in this rule. If you meet even one path on paper today, you are looking at a listing-level approval with retroactive back pay to your onset date. See See If You Qualify to start.