Leonard David Elkun, MD
Geriatric Psychiatry Physician · Chicago, IL
Leonard David Elkun, MD is a geriatric psychiatry physician with a practice address in Chicago, Illinois, and NPI 1023129145, issued on Aug 31, 2006. Check the license (Illinois 036-041170, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Leonard David Elkun
- Credential
- MD
- Primary taxonomy
- Geriatric Psychiatry Physician 2084P0805X
- License number
- 036-041170 IL
Self-reported in NPPES; status is on the state search - Practice location
- 411 W. Ontario St, Chicago, IL 60610
- Phone
- (312) 943-8322
- Enumerated
- Aug 31, 2006
- Record last updated
- Apr 24, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (312) 843-8323
- Medicare enrollment
- Enrolled (PECOS I20081203000264); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest geriatric psychiatry physician records → All 17 in Illinois → Look up another NPI →
Verify Leonard David Elkun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-041170Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average geriatric psychiatry physician in 2024
467 Medicare Part D claims for 42 beneficiaries, against an average of 1,485 among the 473 providers of this specialty who prescribed in Part D.
Most prescribed
- Zolpidem Tartrate94 claims
- Escitalopram Oxalate82 claims
- Clonazepam67 claims
- Lorazepam63 claims
- Trazodone Hcl24 claims
- Duloxetine Hcl20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Leonard David Elkun among 17 geriatric psychiatry physician records in Illinois
Leonard David Elkun, MD is one of 17 geriatric psychiatry physician records with a practice address in Illinois. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 29% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 41% of these records are
- Record last updated2021 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0805X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Psychiatry Physician providers in Illinois
There are 17 geriatric psychiatry physician records in Illinois.
All 17 in Illinois → Every provider in Chicago → Geriatric Psychiatry Physician nationwide →
The 8 geriatric psychiatry physician records with the nearest ZIP codes
- Pradeep Rattan, M.D.Chicago, IL 606081669460879
- Rajeev Malhotra, M.D.Naperville, IL 605641194753491
- Mehrdad Abbassian, M.D.Westmont, IL 605591871527846
- Chris D'Agostino, DOHoffman Estates, IL 601941568494987
- Pauline Wiener, M.D.Carol Stream, IL 601881073680187
- Loveleen Khehra, MDMaywood, IL 601531447749411
- Mohammed Siddiqui, MDLombard, IL 601481639456122
- Karen Kreiner, MDWoodstock, IL 600981962500140
Common questions
What is Leonard David Elkun, MD's NPI number?
Leonard David Elkun, MD's National Provider Identifier (NPI) is 1023129145, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Leonard David Elkun, MD located?
The NPPES record lists a practice address at 411 W. Ontario St, Chicago, IL, 60610. Phone: (312) 943-8322. Providers update this record themselves, so call before visiting.
How can I verify Leonard David Elkun, MD's license?
NPPES lists Illinois license number 036-041170, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Leonard David Elkun, MD prescribe under Medicare Part D?
In 2024, Leonard David Elkun, MD had 467 Medicare Part D claims for 42 beneficiaries; the average among geriatric psychiatry physician prescribers was 1,485. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.