No.  In order to assure proper payment, providers with categories of service that don’t require an NPI must continue to use their NYS Medicaid Provider ID and Locator Code in performing their billing and related functions with NYSDOH.
For a list of the Categories of Service that do not have to obtain an NPI for billing NYS Medicaid, please refer to http://www.emedny.org/hipaa/FAQs/Do_I_need_NPI_for_billing.html.