This has actually changed quite a bit, and continues to change rapidly. The state and federal government agencies who fund a significant chunk of newborn hearing screening tests are being much more insistent that a case is not considered successfully handled unless the child receives an early intervention assessment and audiological follow-up happens by age 3 months with intervention (if determined to be necessary) by six months. It isn't perfect yet, but it is getting better.
For the record, 16 years ago I was told my child had a "blue card" in her chart (meaning failed NBHS) and I should probably get her hearing checked. No material, no referral for an ABR, no communications choices, nada. She was born in Canada, and was tested in the nursery before NBHS was mandatory because she was considered high risk for hearing loss because her outer ears were different sizes.
With 46 out of 50 states with NBHS legislation in place, this really is where you are going to get information to the majority of families with newly diagnosed children with hearing impairments today. The kids who are going to get missed are:
1) False negatives
2) Home and birthing center births
3) People who opt out of testing or leave before testing can be done
4) Children with progressive losses who pass as newborns and acquire hearing impairments over time. EVAS, CMV, Meningitis are the most likely causes of this happening, so it does happen, but it is a minority of cases.
BTW, a list of every EHDI coordinator in the US can be found at
State Contacts for Newborn Hearing Programs
Even if you only get information to 75 % of the families through newborn hearing screening, it is a lot better than nothing.
Sheri