https://www.emedny.org/ProviderManu...n_for_All_Providers-General_Policy_2011-1.pdf
The above is the site where the Provider General Guidelines for NY Medicaid program can be found. On page 11 of the manual it states the following:
"When Medicaid Enrollees Cannot be Billed
This is the policy of the Medicaid Program concerning the enrollee, including those Medicaid enrollees who are enrolled in a Managed Care Plan and in Family Health Plus.
Acceptance and Agreement
When a provider accepts a Medicaid enrollee as a patient, the provider agrees to bill Medicaid for services provided or, in the case of a Medicaid Managed Care enrollee, agrees to bill the enrollee’s Managed Care Plan for services covered by the contract. The provider is prohibited from requesting any monetary compensation from the enrollee, or his/her responsible relative, except for any applicable Medicaid co-payments.
A provider who participates in Medicaid fee-for-service but does not participate in the enrollee’s Medicaid Managed Care Plan may not bill Medicaid fee-for-service for any services that are included in the Managed Care Plan, with the exception of family planning services. Neither may such a provider bill the enrollee for services that are covered by the enrollee’s Medicaid Managed Care contract unless there is a prior agreement with the enrollee that he/she is being seen as a private patient as described above.The provider must inform the enrollee that the services may be obtained at no cost to the enrollee from a provider that participates in the enrollee’s Managed Care Plan.
Private Pay Agreement
A provider may charge a Medicaid enrollee, including a Medicaid enrollee enrolled in a Managed Care Plan, ONLY when both parties have agreed PRIOR to the rendering of the service that the enrollee is being seen as a private-pay patient. This must be a mutual and voluntary agreement. It is suggested that the provider maintain the patient’s signed consent to be treated as private pay in the patient record.
Information for All Providers
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General Policy Version 2011-1 June 1, 2011 Page 11of 64"
Hope this helps. I don't work with NY Medicaid and only googled cause I was curious.