CONTACT PHONE NUMBER (430)    HL7 FIELD (771.1)

This field returns the contact telephone number from the ninth piece of
the corresponding PATIENT file node and is dependent on the CONTACT TYPE
field.  Please refer to Table (A) in the CONTACT TYPE field.  The data
will be returned in HL7 TN (Telephone Number) format as follows
[(999)999-9999X888].  The optional 'X' portion gives an extension.