William Regan M.D.
About this NPIWhat this record shows.
NPI 1164576955 is registered to William Regan M.D., a Psychiatry practising at 221 Stewarts Ferry Pike in Nashville, Tennessee. Psychiatry is the medical specialty focused on the diagnosis, treatment, and prevention of mental health conditions, including depression, anxiety, bipolar disorder, and schizophrenia. William Regan M.D. has been enumerated in the National Provider Identifier (NPI) registry since 2007.
Medicare enrollment
This provider holds 8 Medicare enrollments on file with the Provider Enrollment, Chain and Ownership System (PECOS). Each enrollment carries a public Medicare Enrollment ID (ENRLMT_ID) used by billers and intermediaries.
Practitioner
- I20070824000143PsychiatryTN
- I20170103000816PsychiatryLA
- I20170209001732PsychiatryCO
- I20180622002496PsychiatryFL
- I20220628001219PsychiatryMO
- I20251123000006PsychiatryWY
- I20251212002265PsychiatryUT
- I20260129000201PsychiatryIL
Source: CMS PECOS public enrollment file.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans William Regan M.D. accepts. To confirm in-network status with your specific health plan, contact William Regan M.D. directly at (615) 902-7461.
Frequently asked
Yes. NPI 1164576955 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Psychiatry is the medical specialty focused on the diagnosis, treatment, and prevention of mental health conditions, including depression, anxiety, bipolar disorder, and schizophrenia.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (615) 902-7461.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. William Regan M.D. is a Type-1 individual NPI.