Dr. Mark Williams PH.D.
About this NPIWhat this record shows.
NPI 1801839204 is registered to Dr. Mark Williams PH.D., a Clinical Neuropsychologist practising at 886 Johnnie Dodds Blvd, Suite 102 in Mount Pleasant, South Carolina. Clinical Neuropsychologist is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Dr. Mark Williams PH.D. has been enumerated in the National Provider Identifier (NPI) registry since 2006.
Your brand here.
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 Dr. Mark Williams PH.D. accepts. To confirm in-network status with your specific health plan, contact Dr. Mark Williams PH.D. directly at (843) 425-7142.
Frequently asked
Yes. NPI 1801839204 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Clinical Neuropsychologist is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
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 (843) 425-7142.
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. Dr. Mark Williams PH.D. is a Type-1 individual NPI.