Dr. Alan J. Simmons, MD
- Medicare services, 2024
- 382
- Medicare patients, 2024
- 375
- Part D claims, 2019
- 12
- Hospital affiliations
- 3
- Industry payments
- $14
- Practice address
- 4201 Medical Center Drive, Mchenry, IL 60050
- Practice phone
- Call (815) 344-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Simmons' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Alan J. Simmons is a hospitalist in Mchenry, Illinois
Dr. Simmons practices at Northwestern Medicine McHenry Hospital in Mchenry, Illinois, part of Northwestern Memorial HealthCare.
Dr. Simmons' NPI, 1083818561, was assigned on June 11, 2007. Dr. Simmons graduated from University of Louisville School of Medicine in 2007. Dr. Simmons holds Illinois license 036136647.
- NPI
- 1083818561NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204010283
- NPI enumeration date
- June 11, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (815) 344-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Alan J. Simmons practices at Northwestern Medicine McHenry Hospital in Mchenry, Illinois
Dr. Simmons' primary practice is Northwestern Medicine McHenry Hospital, at 4201 Medical Center Drive, Mchenry, IL 60050 in Mc Henry County. The practice phone is (815) 344-5000.
- Northwestern Medicine McHenry Hospital4201 Medical Center Drive, Mchenry, IL 60050 · Mc Henry CountyPhone(815) 344-5000
Source: Dmand AI Affiliation Data
Dr. Alan J. Simmons is affiliated with 4 sites of care and 2 medical groups
Dr. Simmons' primary practice is Northwestern Medicine McHenry Hospital in Mchenry, Illinois, part of Northwestern Memorial HealthCare. Dr. Simmons is also affiliated with Northwestern Medicine Catherine Gratz Griffin Lake Forest Hospital. The medical group on file is Northwestern Medical Faculty Foundation. Dmand AI also links Dr. Simmons to 1 more hospital, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Alan J. Simmons' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Simmons practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Medicine McHenry Hospital | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Northwestern Memorial HealthCare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Alan J. Simmons is one of 1,321 hospitalists in Illinois
Hospitalist is Dr. Simmons' primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dmand AI has Dr. Simmons' licenses on file in 3 states: Illinois, Kentucky and Tennessee.
Specialties and state licenses
- Hospitalist, IllinoisPrimary
- Internal medicine, Kentucky
- Tennessee license
Hospitalists near Dr. Simmons
Counts of hospitalists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Alan J. Simmons billed Medicare for 382 services in 2024
CMS data shows 382 Medicare services from Dr. Simmons across 2 procedure codes in 2024, for 375 Medicare patients. Medicare paid $40,371 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Simmons' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4492024: 38215%
Dr. Simmons compared with the Illinois median for hospitalists, 2024
- Dr. Simmons
- Illinois median
- Medicare services
- 382vs 54330% below
- Medicare patients
- 375vs 24255% above
- Part D claims
- 12vs 5377% below
Medians across 1,248 hospitalists in Illinois with Dmand AI profiles that report each measure.
Dr. Simmons' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Simmons?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Simmons and other hospitalists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Alan J. Simmons treated 375 Medicare patients in 2024, average age 77
CMS counts 375 Medicare patients who saw Dr. Simmons in 2024. The largest group is 75 to 84, with 143 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 21% are also on Medicaid. Their average risk score is 2.27, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Simmons' median patient age at 76, with 55% women.
Dr. Simmons' Medicare patients by age, 2024
Dr. Simmons' Medicare patients by sex, 2024
- Women21056%
- Men16544%
Chronic conditions among Dr. Simmons' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis68%
- Ischemic heart disease58%
- Heart failure51%
- Chronic kidney disease50%
- Anxiety46%
- Mood disorders46%
Share of Medicare patients with each condition. A patient can have several.
Dr. Simmons' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Alan J. Simmons wrote 12 Medicare Part D claims in 2019
In 2019, Dr. Simmons wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $165 in total drug cost.
Dr. Simmons' most prescribed drugs by claims, 2019
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Alan J. Simmons takes part in Medicare
Dr. Simmons accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Alan J. Simmons received $14 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Simmons from 1 drug or device company in 2016. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $14.
Companies that paid Dr. Simmons the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Alan J. Simmons graduated from University of Louisville School of Medicine
Dr. Simmons graduated from University of Louisville School of Medicine in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Alan J. Simmons's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Alan J. Simmons
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Alan J. Simmons' NPI number?
Dr. Alan J. Simmons' NPI number is 1083818561. It was assigned on June 11, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Alan J. Simmons?
Dr. Alan J. Simmons is a hospitalist in Mchenry, Illinois. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Alan J. Simmons practice?
Dr. Simmons practices at 4201 Medical Center Drive, Mchenry, IL 60050. Dr. Simmons' primary practice is Northwestern Medicine McHenry Hospital in Mchenry, Illinois, part of Northwestern Memorial HealthCare. Dmand AI also links Dr. Simmons to 1 hospital, 1 group practice or clinic and 1 medical group.
What is Dr. Alan J. Simmons' office phone number?
The practice phone on file for Dr. Simmons is (815) 344-5000.
What is Dr. Alan J. Simmons' medical license number?
Dr. Simmons holds Illinois license 036136647, one of the licenses on file in 3 states.
Which states has Dr. Alan J. Simmons been licensed in?
Dmand AI has state licenses on file for Dr. Simmons in Illinois, Kentucky and Tennessee.
Which hospitals is Dr. Alan J. Simmons affiliated with?
Dr. Simmons practices at Northwestern Medicine McHenry Hospital in Mchenry, Illinois. Dr. Simmons is also affiliated with Northwestern Medicine Catherine Gratz Griffin Lake Forest Hospital. Dmand AI links Dr. Simmons to 1 more hospital.
What medical group is Dr. Alan J. Simmons part of?
Dr. Simmons is linked to Northwestern Medical Faculty Foundation. Dmand AI links Dr. Simmons to 1 more medical group.
Does Dr. Alan J. Simmons accept Medicare?
Yes. CMS data shows Dr. Simmons billed Medicare for 382 services in 2024, and Dr. Simmons accepts Medicare assignment.
How many Medicare patients does Dr. Alan J. Simmons see?
CMS counts 375 Medicare patients who saw Dr. Simmons in 2024, with an average age of 77.
Show 5 more questionsShow fewer questions
What services does Dr. Alan J. Simmons bill to Medicare?
In 2024, Dr. Simmons' most billed Medicare services were hospital inpatient care (99222) and hospital inpatient care (99223).
Where did Dr. Alan J. Simmons go to medical school?
Dr. Simmons graduated from University of Louisville School of Medicine in 2007.
What drugs does Dr. Alan J. Simmons prescribe most?
In 2019 Medicare Part D data, Dr. Simmons' most prescribed drugs by claims were Prednisone.
Has Dr. Alan J. Simmons received payments from drug or device companies?
CMS Open Payments shows $14 in general payments to Dr. Simmons from 1 company from 2016 to 2016. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Alan J. Simmons been practicing?
Dr. Simmons graduated from medical school in 2007, 19 years ago.
Selling to hospitalist practices?
See hospitalists in Illinois by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card