Alan J. Simmons, MD
Hospitalist Physician · McHenry, IL
Alan J. Simmons, MD is a hospitalist physician with a practice address in McHenry, Illinois, and NPI 1083818561, issued on Jun 11, 2007. Check the license (Illinois 036136647, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Alan J. Simmons
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License numbers
- 036136647 IL
43972 KY
45612 TN
Self-reported in NPPES; status is on the state search - Practice location
- 4309 W Medical Center Dr, McHenry, IL 60050
- Phone
- (815) 338-6600
- Enumerated
- Jun 11, 2007
- Record last updated
- Jul 21, 2022
- Medicaid IDs
- 1527128 TN
7100149020 KY
201013040 IN - Medicare enrollment
- Enrolled (PECOS I20151112002410); accepts Medicare assignment
- Medical or professional school
- University Of Louisville School Of Medicine, 2007
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 1,535 in Illinois → Look up another NPI →
Also registered at 4309 W Medical Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Alan J. Simmons 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 036136647Check 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
- Northwestern Medical Faculty FoundationHuntley, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alan J. Simmons among 1,535 hospitalist physician records in Illinois
Alan J. Simmons, MD is one of 1,535 hospitalist physician records with a practice address in Illinois. 92% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 12% of them.
- NPI issued2007 · 12% of these records are older, 81% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileYes · 87% of these records are
- Graduated2007 · median 2013 among the 1,339 with a school on file
- Record last updated2022 · 32% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
36 hospitalist physician records list a practice address in McHenry
They are 36 of the 1,852 NPPES records with a practice address in McHenry, and 1,535 hospitalist physician records in Illinois.
All 1,535 in Illinois → Every provider in McHenry → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Altaf Aman, M.D.McHenry, IL 600501942381132
- Shaji Baig, MDMcHenry, IL 600501023216405
- Neha Desai, M.D.McHenry, IL 600501124110234
- James Harley, MDMcHenry, IL 600501174582738
- Nasreen Jalil, M.D.McHenry, IL 600501891986048
- Muhammad Javed, M.DMcHenry, IL 600501184892283
- Antonio Mister, M.D.McHenry, IL 600501104079185
- Jagpal Sahota, M.D.McHenry, IL 600501083712202
Common questions
What is Alan J. Simmons, MD's NPI number?
Alan J. Simmons, MD's National Provider Identifier (NPI) is 1083818561, issued on Jun 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Alan J. Simmons, MD located?
The NPPES record lists a practice address at 4309 W Medical Center Dr, McHenry, IL, 60050. Phone: (815) 338-6600. Providers update this record themselves, so call before visiting.
How can I verify Alan J. Simmons, MD's license?
NPPES lists Illinois license number 036136647, 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.