Aaron Leonard Klein, M.D.
Anatomic Pathology & Clinical Pathology Physician · Mount Vernon, IL
Aaron Leonard Klein, M.D. is an anatomic pathology & clinical pathology physician with a practice address in Mount Vernon, Illinois, and NPI 1467623082, issued on Mar 23, 2008. Check the license (Illinois 036133987, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Aaron Leonard Klein
- Credential
- M.D.
- Primary taxonomy
- Anatomic Pathology & Clinical Pathology Physician 207ZP0102X
- License number
- 036133987 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1 Good Samaritan Way, Mount Vernon, IL 62864
- Phone
- (618) 899-1994
- Enumerated
- Mar 23, 2008
- Record last updated
- Jan 2, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20180807003626); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest anatomic pathology & clinical pathology physician records → All 789 in Illinois → Look up another NPI →
Also registered at 1 Good Samaritan Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Keri Ashmore, NPFamily Nurse Practitioner1891593315
- Allison BaldwinStudent in an Organized Health Care Education/Training Program1285425405
- Nicole Boyd, FNP-BCFamily Nurse Practitioner1710439112
- Nicholas BurkeEmergency Medicine Physician1174144364
- Derek Burns, PHARMDPharmacist1154797298
- Hitanshu Chawla, M.D.Internal Medicine Physician1942645692
Verify Aaron Leonard Klein 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 036133987Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Cedar Valley Medical Specialists PCWaterloo, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aaron Leonard Klein among 789 anatomic pathology & clinical pathology physician records in Illinois
Aaron Leonard Klein, M.D. is one of 789 anatomic pathology & clinical pathology physician records with a practice address in Illinois. 55% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 49% of them.
- NPI issued2008 · 49% of these records are older, 42% newer
- In a Medicare fileYes · 55% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2008 · median 2003 among the 396 with a school on file
- Record last updated2014 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207ZP0102X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Anatomic Pathology & Clinical Pathology Physician providers in Illinois
There are 789 anatomic pathology & clinical pathology physician records in Illinois.
All 789 in Illinois → Every provider in Mount Vernon → Anatomic Pathology & Clinical Pathology Physician nationwide →
The 8 anatomic pathology & clinical pathology physician records with the nearest ZIP codes
- Adelaide Horcher, M.D.Mount Vernon, IL 628641053312918
- Moses Adeyanju, M.D.Carbondale, IL 629011306820121
- Heather Barrett, MDCarbondale, IL 629011619105897
- Elliott Lhospital, D.O.Carbondale, IL 629011568880243
- Ibraheem Javeed MohammedCarbondale, IL 629011477047124
- Rupal Parmar, M.D.Carbondale, IL 629011003846247
- Hong Chen, MDCentralia, IL 628011023087152
- Gregory Akers, MDSpringfield, IL 627811831202688
Common questions
What is Aaron Leonard Klein, M.D.'s NPI number?
Aaron Leonard Klein, M.D.'s National Provider Identifier (NPI) is 1467623082, issued on Mar 23, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Leonard Klein, M.D. located?
The NPPES record lists a practice address at 1 Good Samaritan Way, Mount Vernon, IL, 62864. Phone: (618) 899-1994. Providers update this record themselves, so call before visiting.
How can I verify Aaron Leonard Klein, M.D.'s license?
NPPES lists Illinois license number 036133987, 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.
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.