Quick answers
- Where does Leif E. Leaf see patients?
- Medicare's clinician data lists 1 practice location in Leavenworth, KS. Call before your visit to confirm the address.
- What is Leif E. Leaf's specialty?
- Medicare lists Clinical Psychologist as the primary specialty.
- Does Leif E. Leaf accept Medicare assignment?
- Yes. Medicare's clinician data says Leif E. Leaf accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Leif E. Leaf?
- (913) 651-8415, as listed in official Medicare / NPI Registry data.
- What is Leif E. Leaf's NPI number?
- 1336244631. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Leif E. Leaf is enrolled with Medicare (CMS data updated 2026-10-02).
- 3515 S 4th St, Suite 101Leavenworth, KS 66048 (913) 651‑8415
Group practices
Medicare enrollment lists Leif E. Leaf as a member of this group (CMS data updated 2026-10-02).
- Frederick J Tirrell PHD Professional Association4 clinicians in the group
Specialties
- Clinical Psychologistprimary
Other clinical psychologists in Leavenworth
Clinicians with the same Medicare primary specialty in Leavenworth, KS — not a recommendation.
Clinician information
| Credential | CP |
|---|---|
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336244631 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians