Leonard D Elkun MD Sc
NPI 1356446306 · Geriatric Psychiatry Physician · Chicago, IL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leonard D Elkun MD Sc is a Geriatric Psychiatry Physician organization in Chicago, IL (NPI 1356446306).
Provider details
- NPI number
- 1356446306
- Entity type
- Organization
- Primary specialty
- Geriatric Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Leonard Elkun, President(312) 943-8322
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-14
- Last updated
- 2021-04-24
- Certified
- 2021-04-24
Frequently asked questions
- What is Leonard D Elkun MD Sc's NPI number?
- Leonard D Elkun MD Sc's National Provider Identifier (NPI) is 1356446306, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Leonard D Elkun MD Sc?
- Leonard D Elkun MD Sc is classified in the NPPES registry as Geriatric Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Leonard D Elkun MD Sc located?
- Leonard D Elkun MD Sc's practice location on file with NPPES is 411 W Ontario St, Chicago, IL 60610-6945.
- What is Leonard D Elkun MD Sc's phone number?
- The practice phone number listed in the NPPES registry for Leonard D Elkun MD Sc is (312) 943-8322.
- Does Leonard D Elkun MD Sc accept Medicare?
- Leonard D Elkun MD Sc is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Leonard D Elkun MD Sc?
- The authorized official listed on Leonard D Elkun MD Sc's NPPES record is Leonard Elkun, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Leonard D Elkun MD Sc's NPI active?
- Yes — Leonard D Elkun MD Sc's NPI (1356446306) is active in the NPPES registry as of the last update on 2021-04-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.