Disability Evaluation Under Social Security
100.00 Low Birth Weight and Failure to Thrive
A. What conditions do we evaluate under these listings? We evaluate low birth weight (LBW) in infants from birth to attainment of age 1 and failure to thrive (FTT) in infants and toddlers from birth to attainment of age 3.
B. How do we evaluate disability based on LBW under 100.04? In 100.04A and 100.04B, we use an infant’s birth weight as documented by an original or certified copy of the infant’s birth certificate or by a medical record signed by a physician. Birth weight means the first weight recorded after birth. In 100.04B, gestational age is the infant’s age based on the date of conception as recorded in the medical record. If the infant’s impairment meets the requirements for listing 100.04A or 100.04B, we will follow the rules in § 416.990(b)(11) of this chapter.
C. How do we evaluate disability under 100.05?
1. General. We establish FTT with or without a known cause when we have documentation of an infant’s or toddler’s growth failure and developmental delay from an acceptable medical source(s) as defined in § 416.913(a) of this chapter. We require documentation of growth measurements in 100.05A and developmental delay in 100.05B or 100.05C within the same consecutive 12-month period. The dates of developmental testing and reports may be different from the dates of the growth measurements. After the attainment of age 3, we evaluate growth failure under the affected body system(s).
2. Growth failure. Under 100.05A, we use the appropriate table(s) under 105.08B in the digestive system to determine whether a child’s growth is less than the third percentile. The child does not need to have a digestive disorder for the purposes of 100.05.
c. BMI is the ratio of a child’s weight to the square of his or her height. We calculate BMI using the formulas in 105.00G2c.
d. Growth measurements. The weight-for-length measurements for children from birth to attainment of age 2 and BMI-for-age measurements in children age 2 to attainment of age 3 that are required for this listing must be obtained within a 12-month period and at least 60 days apart. If a child attains 2 during the evaluation period, additional measurements are not needed. Any measurements taken before the child attains age 2 can be used to evaluate the impairment under the appropriate listing for the child’s age. If the child attains age 3 during the evaluation period, the measurements can be used to evaluate the impairment in the affected body system.
b. Under 100.05B, we document the severity of developmental delay with results from a standardized developmental assessment, which compares a child’s level of development to the level typically expected for his or her chronological age. If the child was born prematurely, we may use the corrected chronological age (CCA) for comparison. (See § 416.924b(b) of this chapter.) CCA is the chronological age adjusted by a period of gestational prematurity. CCA= (chronological age) – (number of weeks premature). Acceptable medical sources or early intervention specialists, physical or occupational therapists, and other sources may conduct standardized developmental assessments and developmental screenings. The results of these tests and screening must be accompanied by a statement or records from an acceptable medical source who established the child has a developmental delay.
c. Under 100.05C, when there are no results from a standardized developmental assessment in the case record, we need narrative developmental reports from the child’s medical sources in sufficient detail to assess the severity of his or her developmental delay. A narrative developmental report is based on clinical observations, progress notes, and well-baby check-ups. To meet the requirements for 100.05C, the report must include: the child’s developmental history; examination findings (with abnormal findings noted on repeated examinations); and an overall assessment of the child’s development (that is, more than one or two isolated skills) by the medical source. Some narrative developmental reports may include results from developmental screening tests, which can identify a child who is not developing or achieving skills within expected timeframes. Although medical sources may refer to screening test results as supporting evidence in the narrative developmental report, screening test results alone cannot establish a diagnosis or the severity of developmental delay.
1. We may find infants disabled due to other disorders when their birth weights are greater than 1200 grams but less than 2000 grams and their weight and gestational age do not meet listing 100.04. The most common disorders of prematurity and LBW include retinopathy of prematurity (ROP), chronic lung disease of infancy (CLD, previously known as bronchopulmonary dysplasia, or BPD), intraventricular hemorrhage (IVH), necrotizing enterocolitis (NEC), and periventricular leukomalacia (PVL). Other disorders include poor nutrition and growth failure, hearing disorders, seizure disorders, cerebral palsy, and developmental disorders. We evaluate these disorders under the affected body systems.
2. We may evaluate infants and toddlers with growth failure that is associated with a known medical disorder under the body system of that medical disorder, for example, the respiratory or digestive body systems.
3. If an infant or toddler has a severe medical determinable impairment(s) that does not meet the criteria of any listing, we must also consider whether the child has an impairment(s) that medically equals a listing (see § 416.926 of this chapter). If the child’s impairment(s) does not meet or medically equal a listing, we will determine whether the child’s impairment(s) functionally equals the listings (see § 416.926a of this chapter) considering the factors in § 416.924a of this chapter. We use the rules in § 416.994a of this chapter when we decide whether a child continues to be disabled.
A. Birth weight (see 100.00B) of less than 1200 grams.
|Gestational Age (in weeks)||Birth Weight|
|37-40||2000 grams or less|
|36||1875 grams or less|
|35||1700 grams or less|
|34||1500 grams or less|
|33||1325 grams or less|
|32||1250 grams or less|
100.05 Failure to thrive in children from birth to attainment of age 3 (see 100.00C), documented by A and B, or A and C.
c. Less than the third percentile on the appropriate weight-for-length table under 105.08B1; or
c. Less than the third percentile on the appropriate BMI-for-age table under 105.08B2.
B. Developmental delay (see 100.00C1 and C3), established by an acceptable medical source and documented by findings from one current report of a standardized developmental assessment (see 100.00C3b) that:
1. Are dated at least 120 days apart (see 100.00C1); and