Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Leif Eric Leaf, PHD
Psychologist in Leavenworth, KS · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1336244631
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Registry record
Entity type Individual (Type 1)
Name Leif Eric Leaf
Credential PHD
Sex Male
Practice address 3515 S 4th St, Professional Association, Leavenworth, KS, 66048
Phone (913) 651-8415
Fax (913) 772-8580
Enumeration date Sep 13, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
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 |
|---|---|---|---|
| 119716 | Other | KS | BCBS OF KANSAS |
| 2094031 | Other | - | CIGNA |
| 24103022 | Other | KS | BCBS OF KC KS |
| 004517 | Other | - | BCBS OF KANSAS GROUP |
| 5240235 | Other | - | AETNA |
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.
Frequently asked questions
Is NPI 1336244631 active?
Yes, as of the latest NPPES snapshot, NPI 1336244631 is active (record last updated 2007-07-08).
How do I verify Leif Leaf's NPI record?
Cross-check NPI 1336244631 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Judith Johnson Psychiatric/Mental Health Nurse Practitioner · Leavenworth, KS NPI 1962458182 Gregory Ellermann Psychologist · Leavenworth, KS NPI 1801991195 Jacqueline Pfeifer Psychologist · Leavenworth, KS NPI 1710082078 Man Anand Psychiatry Physician · Leavenworth, KS NPI 1194811281 Annalise Tinker Professional Counselor · Leavenworth, KS NPI 1033729660
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.