As of March 12, 2019, all H-1B petitions will be eligible for premium processing.
Acccording to the USCIS recent annoucement:
USCIS will resume premium processing on Tuesday, March 12, for all H-1B petitions. If you received a request for evidence (RFE) for a pending petition, you should include the RFE response with the premium processing request.
When an H-1B petitioner properly requests the agency’s premium processing service, USCIS guarantees a 15-day processing time. If we do not take certain adjudicative action within the 15‑calendar day processing time, USCIS refunds the petitioner’s premium processing service fee and continues with expedited processing of the petition.
This information is provided as an educational service. Consult with an attorney for your specific circumstances. For a comprehensive evaluation of your immigration options, you are invited to call me at 214-472-2161, complete my contact form, or visit my websites at www.badmuslaw.com and www.physicianimmigration.com.