William Tanner Slay
Physician Assistant · Jackson, MS
William Tanner Slay is a physician assistant with a practice address in Jackson, Mississippi, and NPI 1902696123, issued on May 9, 2025. Check the license (Mississippi PA00921, as entered in NPPES) with the Mississippi board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Tanner Slay
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA00921 MS
Self-reported in NPPES; status is on the state search - Practice location
- 501 Marshall St Ste 301, Jackson, MS 39202
- Phone
- (601) 353-9900
- Enumerated
- May 9, 2025
- Record last updated
- Aug 26, 2025
- Medicare enrollment
- Enrolled (PECOS I20250911003472); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 338 in Mississippi → Look up another NPI →
Also registered at 501 Marshall St Ste 301
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kieran Hynes, MDUrology Physician1235629973
- Matthew Moss, MDUrology Physician1710418546
- Seth Stuart, NPNurse Practitioner1902578685
Verify William Tanner Slay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Mississippi board licenses this profession
Search for license PA00921Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Mississippi Urology Clinic PLLCFlowood, MS
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Tanner Slay among 338 physician assistant records in Mississippi
William Tanner Slay is one of 338 physician assistant records with a practice address in Mississippi. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 84% of them.
- NPI issued2025 · 84% of these records are older, 7% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2025 · median 2020 among the 223 with a school on file
- Record last updated2025 · 31% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Mississippi practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physician Assistant providers in Mississippi
There are 338 physician assistant records in Mississippi.
All 338 in Mississippi → Every provider in Jackson → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Eva CarmodyJackson, MS 392021982234183
- Tammy Davis, PA-CJackson, MS 392021184081234
- Brelynn DuboseJackson, MS 392021811602246
- Casey Elliott, PAJackson, MS 392021447722558
- Melanie Furr, PA-CJackson, MS 392021538518519
- Jesse Hanks, PA-CJackson, MS 392021306434477
- Betsy Hood, PAJackson, MS 392021356001614
- Caroline IrbyJackson, MS 392021922711944
Common questions
What is William Tanner Slay's NPI number?
William Tanner Slay's National Provider Identifier (NPI) is 1902696123, issued on May 9, 2025. An NPI identifies a provider in billing; it is not a license.
Where is William Tanner Slay located?
The NPPES record lists a practice address at 501 Marshall St Ste 301, Jackson, MS, 39202. Phone: (601) 353-9900. Providers update this record themselves, so call before visiting.
How can I verify William Tanner Slay's license?
NPPES lists Mississippi license number PA00921, as entered by the provider. Search the Mississippi board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.