Check status through portal  Dear Steve Albert,  Thank you for contacting our Service Department for MultiPlan/PHCS. We would be happy to assist you with a demographic update. Please submit your requested changes on letterhead signed by the group administrator or duly authorized representative along with the group name, address and TIN affiliated with the group.  Please fax the information to our Registrar department at (781) 487-8273 or email registrar@multiplan.com.  If you have any questions regarding your current inquiry, please contact our Customer Service department at 800-950-7040 with reference to your Case # 7901374. You may re-open a closed case using the Portal if you have further inquiry on the same case.  Sent to: nucc@claimsmedinc.com