Update this page – If you believe information in your NPPES record is inaccurate, or if you wish to update or deactivate your NPI, you can do so directly with CMS.
Individual
MR. WILLIAM HAROLD LAYTON
Active
Individual
MR. WILLIAM HAROLD LAYTON
Active
Sole proprietor
No
Provider details
NPI number
Gender
Man
Credential
CRNA
Taxonomy
Speciality
Code
Description
License number
State
163W00000X
Registered Nurse
642966
NY
363L00000X
Nurse Practitioner
ARNP9264598
FL
367500000X
Certified Registered Nurse Anesthetist
087645
NY
367500000X
Certified Registered Nurse Anesthetist
Primary
ARNP9264598
FL
Other
Enumeration date
06/27/2011
Last updated
12/29/2025
About Stedi
Stedi is the only programmable healthcare clearinghouse. You can use Stedi's APIs to process eligibility checks, claims, remits, and more.
Sign up