An infant child suffering a rare brain tumor was rejected coverage after his insurance company deemed the treatment process to be 'experimental' and 'not medically necessary' in nature.

The agency, HIP Health Plan of New York, addressed a letter to nine-month-old baby Connor, who was diagnosed with a teratoid rhabdoid - a tumor that affects the central nervous system and holds a low survival rate in children.

After receiving the letter, baby Connor's heart-stricken father, Wayne Richardson, shared details on the concerning matter while speaking with The Daily Beast.

The letter went into detail explaining reasons why the insurance company would be withholding the baby's health coverage.

Baby Connor was rejected coverage for treatment of a rare brain tumor after his insurance company deemed the treatment process to be 'not medically necessary'

Connor was diagnosed with a teratoid rhabdoid - a tumor that affects the central nervous system and holds a low survival rate in children

Baby Connor initially underwent intensive surgery to remove the tumor entirely at Stony Brook University Hospital in New York

The child was denied further coverage when doctors at St. Jude found the brain tumor had come back

The explanation read: 'Dear Connor Richardson, As HIP Health Plan of New York, we try hard to provide you with access to quality health care services that meet your needs. When we decide to deny coverage for treatment or service, we want to make sure you know why.

'We look over the clinical and medical information given to us and check the criteria, guidelines and the rules of your health coverage policy to make our decision,' the letter said.

'When we reviewed the information given to us about this request, we have decided to deny coverage of the following medical service(s) or item(s) that you or your provider asked for: Inpatient Hospitalization to St. Jude Hospital from 10/4/2017-10/10/2017. We have determined that the service(s) are not medically necessary.'

The letter went on to add that specific medications administered to the ill infant did not meet the general care standard used to treat the form of tumor in past instances.

Connor's father, Wayne Richardson condemned the insurance company: 'You're taking away from (St. Jude) and their research…because the insurance doesn't want to pay'

'The principal investigator has requested medications including methotrexate, cisplatin, cyclophosphamide, vincristine in combination with an investigational medication, alisertib,' the mail read.

'This combination is considered experimental and investigational at this time, as evidence-based guidelines do not exist to confirm its effectiveness for his brain tumor.

'Therefore, this request for clinical trial treatment at St. Jude's hospital is not medically necessary and is denied.'

Baby Connor initially underwent intensive surgery to remove the tumor entirely at Stony Brook University Hospital in New York.

When speaking of baby Connor's life, Wayne said: 'You don't care what it costs'

Medical officials sadly had to inform the family that Connor's tumor had returned when he went in for a follow-up appointment at St. Jude's Research Hospital in Memphis, Tennessee.

The cancer was found in the infant's spine during his second round of treatments, which left doctors no choice but to try more aggressive forms of medication for precautionary purposes.

According to the Daily Beast, Connor's chemotherapy was luckily still covered at no cost thanks to St. Jude's guidelines.

However, the father wasn't able to get past the insurance company's bizarre letter addressed to his infant baby - while explaining further that the money would have ultimately benefited the important cause of childhood cancer research.

'You're taking away from them and their research…because the insurance doesn't want to pay,' said Wayne.

But HIP determined the clinical trial would not be a guaranteed safeguard for the infant's life, and decided the coverage was much too costly.

Wayne, a police officer for NYPD, told the newspaper he has been insured under the company for several years and has never been hospitalized.

When speaking of baby Connor's life, Wayne added: 'You don't care what it costs.'