Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Donald C Layton, PHD

Clinical Neuropsychologist in Indianapolis, IN · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1255437778

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Registry record

Entity type Individual (Type 1)

Name Donald C Layton

Credential PHD

Sex Male

Practice address 355 W 16th St, Suite 5100, Indianapolis, IN, 46202

Phone (317) 396-1300

Fax (317) 924-8472

Enumeration date Sep 15, 2006

Last updated in NPPES Apr 1, 2014

Taxonomy & licenses

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 20040047 (IN) Primary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 20040047A (IN) Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
P01271614	Other	IN	RAILROAD MEDICARE
200884610	Medicaid	IN	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How do I verify Donald Layton's NPI record?

Cross-check NPI 1255437778 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1255437778 active?

Yes, as of the latest NPPES snapshot, NPI 1255437778 is active (record last updated 2014-04-01).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-04-01.