Depends on what her actual deficit is. Does she know how to decode phonetically, but isn't efficient (fluency and automaticity), or does she lack actual phonetic decoding skills? Does auditory processing affect phonological processing (in which case, she's probably reading with a huge rote sight vocabulary)? If auditory processing is an issue in reading, there might be some benefit from speech/language therapy. Likewise, some slps do remediation for fluency, through programs such as Read Naturally. OT is probably not going to help, unless there are also fine motor or upper body tone or stability issues affecting writing.
If phonological processing is still weak, then Lindamood Bell, Orton Gillingham, etc. would be avenues to primary remediation of basic decoding, with secondary benefits for fluency.
