When Newborn Pulse Oximetry Screening Is Missed or Delayed in New York

If your newborn’s pulse oximetry screening was missed, delayed, or never documented before discharge from a New York hospital, you may have questions about what this test is, why it matters, and what to do next.

Pulse oximetry screening is a quick, noninvasive oxygen check used to help identify critical congenital heart defects and other conditions affecting a newborn’s oxygen levels.

In New York, this isn’t an optional extra test some hospitals happen to offer; it’s required by state law. When it doesn’t happen on schedule or isn’t documented, that’s worth understanding, both medically and, in some cases, legally.

What Newborn Pulse Oximetry Screening Is

Congenital heart defects overall affect roughly 1 in 100 babies born in the United States, and about 1 in 4 of those, so roughly 1 in 400 births, involves a critical defect serious enough to require intervention, often surgery, within the first year of life.

Pulse oximetry screening measures the oxygen saturation level in a baby’s blood using small sensors placed on the right hand and one foot. The sensors use light to detect how much oxygen red blood cells are carrying. It’s painless, takes only a few minutes, and doesn’t involve any needles or blood draws.

The screening is designed to catch critical congenital heart defects, known as CCHD, before symptoms appear.

Pulse oximetry is not diagnostic on its own. A passing result doesn’t guarantee there’s no heart problem, and a failing result doesn’t confirm a diagnosis.

It’s a safety check that flags babies who need more testing, and it works: mandated CCHD screening is associated with roughly a 33 percent reduction in early infant deaths from critical congenital heart disease nationally, according to the American Academy of Pediatrics.

Pulse Oximetry Screening Is a Legal Requirement in New York, Not an Optional Extra

In 2013, New York passed legislation, sometimes called the “Pulse Ox Bill,” requiring birthing facilities across the state to screen every newborn for critical congenital heart defects using pulse oximetry.

The New York State Department of Health’s current guidance is direct about this: as part of universal newborn screening, every baby born in New York is supposed to receive a pulse oximetry screening after 24 hours of life.

Why Hospitals Perform This Screening Before Discharge

Some critical congenital heart defects don’t cause visible symptoms right away.

A baby can look healthy, feed well, and have normal color and breathing, while still having dangerously low oxygen levels that only the screening catches.

Early detection lets doctors order an echocardiogram, refer to a pediatric cardiologist, and start treatment before the baby becomes critically ill.

Screening alongside prenatal ultrasound and the newborn physical exam catches roughly 95 percent of CCHD cases before hospital discharge, according to the AAP, though no single piece of that picture catches everything on its own.

When Screening Is Supposed to Happen

Screening is typically performed at 24 hours of age or later, or as close to discharge as possible if the baby is leaving earlier than 24 hours.

This timing isn’t arbitrary: testing too early increases false positives, since a newborn’s oxygen levels and circulation are still adjusting in the first day of life.

Research on screening accuracy shows the false-positive rate is meaningfully lower, roughly 0.06 percent versus 0.14 percent, when the test is done after 24 hours rather than before.

If your baby was discharged very early, within 12 to 18 hours, the screening may have been done before 24 hours or you may have been instructed to return for testing.

What a Missed or Delayed Screen May Mean

A missed or delayed screen doesn’t by itself mean your baby has a heart defect. It means a legally required safety check didn’t happen, wasn’t documented, or happened outside the recommended window.

Reasons vary: early discharge, staffing or workflow issues, charting errors, or a test that was performed but never properly recorded. Sometimes the screen is genuinely delayed because a baby is in the NICU or being monitored for other reasons.

If it was missed entirely, your baby didn’t receive a legally required safety check that could have identified low oxygen.

If it was delayed, your baby may have gone through a higher-risk window before testing happened. If it was done but not documented, you and any future provider may not have access to the result at all.

What Results Can and Cannot Tell Parents

Results are reported as pass or fail based on a specific, current AAP-endorsed algorithm. A reading below 90 percent in either the right hand or foot fails the screen immediately.

A reading between 90 and 94 percent, or a difference of more than 3 percent between the hand and foot, is indeterminate and calls for a repeat screen roughly an hour later.

Under the AAP’s current simplified algorithm, a pass requires a reading of at least 95 percent in both the hand and the foot, with no more than a 3 percent difference between them.

A passing result doesn’t rule out every heart defect; some congenital heart problems don’t cause low oxygen in the newborn period, and this screening is designed specifically to catch the critical defects that do, among them conditions like hypoplastic left heart syndrome, transposition of the great arteries, tetralogy of Fallot, and tricuspid atresia.

A baby can pass and still have a heart condition that shows up later, so ongoing pediatric care and attentiveness to warning signs still matter.

A failing result doesn’t confirm a heart defect either; it means more testing is needed, most often an echocardiogram, sometimes alongside a chest X-ray or blood work. If your baby’s screen was missed, you simply don’t have this baseline information, which can make it harder to know whether oxygen levels were normal at birth if questions come up later.

Signs Parents Should Not Ignore After Discharge

Even with a passed screening, and especially if screening was missed or delayed, watch for blue or gray color in the lips, tongue, or skin, fast or labored breathing, poor feeding or trouble finishing feeds, extreme sleepiness or lethargy, and poor weight gain in the first weeks.

Sweating during feeds, irritability, or visible effort to breathe are also worth flagging.

If any of these appear, don’t wait for a routine pediatric visit. Call the pediatrician immediately, go to an emergency room, or call 911 if your baby is in distress.

Mention to your pediatrician at the first follow-up visit if you’re concerned the screening was missed or delayed, so they can check oxygen levels directly and decide whether further testing is warranted.

When a Delayed Screen May Raise Questions About Hospital Care

Because pulse oximetry screening is a New York legal requirement, not a discretionary practice, a missed or delayed screen is worth examining against that specific standard.

Relevant questions include whether the hospital had a written policy for the screening, whether staff were trained on it, whether the test was ordered but never completed, whether results were documented, and whether any failing or borderline result was followed up appropriately.

Sometimes a missed screen reflects an isolated charting error. Other times it points to broader workflow or staffing problems.

If you have concerns about the quality of care, you can request a meeting with the hospital’s risk management or patient safety team to understand what happened and whether any corrective action followed.

If your baby later develops a condition that screening might have caught, or you believe the missed screen contributed to a delay in diagnosis, an attorney who handles birth injury and medical record review can help you understand whether the hospital’s actions fell below the required standard.

When to Ask for a Legal Review

A legal review may be worth considering if your baby was later diagnosed with a critical congenital heart defect that screening might have caught, experienced a medical emergency that earlier detection might have prevented.

New York generally requires medical malpractice claims to be filed within two and a half years of the malpractice under CPLR 214-a, with CPLR 208 allowing that deadline to be tolled for a minor child up to ten years from the date of the malpractice. If a public hospital was involved, additional notice-of-claim requirements apply on a much shorter timeline.

Our guide on the 90-day notice of claim process explains how that works. A legal review isn’t the same as filing a lawsuit; many families consult an attorney simply to understand what happened and get clear answers, without committing to anything further.

Frequently Asked Questions

Is Pulse Oximetry Screening Actually Required by Law in New York, or Just Common Practice?

It’s a legal requirement. New York passed legislation in 2013 requiring all birthing facilities to screen newborns for critical congenital heart defects using pulse oximetry, and the state’s current newborn screening guidance confirms every baby born in New York should receive this test after 24 hours of life. A missed screen is a gap against a defined legal standard, not simply a skipped optional test.

What Does It Actually Mean if My Baby “Failed” the Screening?

Under the current AAP-endorsed algorithm, failing means an oxygen reading below 90 percent in the hand or foot, or persistently indeterminate readings (90 to 94 percent, or more than a 3 percent hand-to-foot difference) after a repeat test. A failed screen doesn’t confirm a heart defect; it means an echocardiogram or other follow-up testing is needed to find out what’s actually going on.

If the Screening Was Missed, Is There Any Way to Find Out Retroactively if My Baby Had a Problem?

Not directly, since the specific newborn-period test can’t be recreated after the fact. Your pediatrician can perform pulse oximetry at a later visit, which gives current information, but it can’t tell you what your baby’s oxygen levels were during the newborn period itself. That’s part of why documenting the missed screen in your baby’s chart matters going forward.

Does a Missed Screening Automatically Mean the Hospital Was Negligent?

No. It means a required step wasn’t completed or documented, which is a fact worth investigating, not an automatic conclusion. A negligence claim in New York requires showing the care fell below the accepted standard and that this departure caused harm, which depends on the full record and, often, expert medical review.

What If My Baby Passed the Screening but Later Was Diagnosed With a Heart Condition Anyway?

This can happen. Pulse oximetry screening specifically targets critical defects that cause low oxygen; some heart conditions don’t present that way in the newborn period and wouldn’t be caught by this test regardless of how correctly it was performed. A passed screen combined with a later diagnosis isn’t necessarily a sign anything was done wrong.

Getting Clarity on What Happened

A missed or delayed pulse oximetry screening is unsettling to learn about after the fact, especially once you understand it’s a required part of your baby’s care in New York, not an optional extra.

Requesting your complete records is the clearest way to understand what actually happened, what it means for your baby going forward, and whether the gap is worth a closer look.

This article is for informational and educational purposes only. It is not a substitute for medical advice from your child’s healthcare providers or legal advice based on your family’s specific circumstances.

Was Your Baby Injured by Medical Negligence? If you believe a delay in diagnosis or a missed warning sign affected your child’s care in New York, our team can review your medical records and explain your options at no cost. Call 833-99-BIRTH or request a free case review.