æz ˈaʊtlaɪnd ɪnðə fˈɛdɚɹəl ɹˌɛɡjʊlˈeɪʃən, ðə hˈɛlθ ɪnʃˈʊɹɹəns pˌoːɹɾəbˈɪlᵻɾi ænd ɐkˌaʊntəbˈɪlᵻɾi ˈækt ʌv nˈaɪntiːnhˈʌndɹɪd nˈaɪnti sˈɪks hˈɪpɑː, kˈʌvɚd pɹəvˈaɪdɚz mˈʌst ˈɔːlsoʊ ʃˈɛɹ ðɛɹ ˌɛnpˌiːˈaɪ wɪð ˈʌðɚ pɹəvˈaɪdɚz, hˈɛlθ plˈænz, klˈɪɹɪŋhˌaʊzᵻz, ænd ˌɛni ˈɛntᵻɾi ðæt mˈeɪ nˈiːd ɪt fɔːɹ bˈɪlɪŋ pˈɜːpəsᵻz.
As outlined in the federal regulation, The Health Insurance Portability and Accountability Act of 1996 (HIPAA), covered providers must also share their NPI with other providers, health plans, clearinghouses, and any entity that may need it for billing purposes.