Jack G. Guenther, OD
- Medicare patients, 2024
- 111
- Part D claims, 2024
- 33
- Affiliated sites
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 19607 La Grange Rd, Mokena, IL 60448-9360
- Practice phone
- Call (708) 479-1616
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
In Focus - Guenther Eyecare
Physician office · Mokena, Illinois
Find Jack Guenther's 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.
Jack G. Guenther is an optometrist in Hazel Crest, Illinois
Jack Guenther practices at In Focus - Guenther Eyecare in Mokena, Illinois.
Jack Guenther's NPI, 1215047063, was assigned on August 30, 2006. Jack Guenther holds Illinois license 046008314.
- NPI
- 1215047063NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4981892130
- NPI enumeration date
- August 30, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (708) 479-1616
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Jack G. Guenther practices in Mokena and Hazel Crest
Jack Guenther's primary practice is In Focus - Guenther Eyecare, at 19607 La Grange Rd, Mokena, IL 60448-9360. The practice phone is (708) 479-1616. The NPI Registry lists Jack Guenther's practice address as 17800 Kedzie Ave, Hazel Crest, IL 60429.
- In Focus - Guenther EyecarePrimary19607 La Grange Rd, Mokena, IL 60448-9360Phone(708) 479-1616
- NPI Registry address17800 Kedzie Ave, Hazel Crest, IL 60429 · Cook County
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Jack G. Guenther is affiliated with 1 site of care
Jack Guenther's primary practice is In Focus - Guenther Eyecare in Mokena, Illinois.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Jack G. Guenther's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Jack Guenther practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| In Focus - Guenther Eyecare | Available with a free account |
Source: Dmand AI Technology Install Data
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Jack G. Guenther is one of 2,194 optometrists in Illinois
Optometrist is Jack Guenther's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Jack Guenther is licensed in Illinois.
Specialties and state licenses
- Optometrist, IllinoisPrimary
Optometrists near Jack Guenther
Counts of optometrists 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
Jack G. Guenther treated 111 Medicare patients in 2024, average age 75
CMS counts 111 Medicare patients who saw Jack Guenther in 2024. The largest group is 65 to 74, with 66 patients. 71% of them have high cholesterol, and 67% have high blood pressure. Their average risk score is 1.14, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Jack Guenther's median patient age at 70, with 54% women.
Jack Guenther's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Jack Guenther's Medicare patients by sex, 2024
- Women6962%
- Men4238%
Chronic conditions among Jack Guenther's Medicare patients, 2024
- High cholesterol71%
- High blood pressure67%
- Arthritis50%
- Ischemic heart disease32%
- Diabetes23%
- Anxiety22%
- Chronic kidney disease21%
- Osteoporosis20%
Share of Medicare patients with each condition. A patient can have several.
Jack Guenther's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women54%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Jack G. Guenther wrote 33 Medicare Part D claims in 2024
In 2024, Jack Guenther wrote 33 Medicare Part D claims for 23 patients. 58% of them were for generic drugs.
Jack Guenther's Part D claims by kind of drug, 2024
- Generic19 claims58%
- Brand-name14 claims42%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Jack G. Guenther takes part in Medicare
Jack Guenther 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
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Sources for Jack G. Guenther'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| 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 (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) |
| 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 Jack G. Guenther
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What is Jack G. Guenther's NPI number?
Jack G. Guenther's NPI number is 1215047063. It was assigned on August 30, 2006, and it is active in the NPI Registry.
What does Jack G. Guenther specialize in?
Jack G. Guenther is an optometrist in Hazel Crest, Illinois. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Jack G. Guenther practice?
Jack Guenther practices at 19607 La Grange Rd, Mokena, IL 60448-9360. Jack Guenther also practices at 17800 Kedzie Ave, Hazel Crest, IL 60429. Jack Guenther's primary practice is In Focus - Guenther Eyecare in Mokena, Illinois.
What is Jack G. Guenther's office phone number?
The practice phone on file for Jack Guenther is (708) 479-1616.
What is Jack G. Guenther's medical license number?
Jack Guenther holds Illinois license 046008314.
Does Jack G. Guenther accept Medicare?
Yes. CMS lists Jack Guenther as accepting Medicare assignment.
How many Medicare patients does Jack G. Guenther see?
CMS counts 111 Medicare patients who saw Jack Guenther in 2024, with an average age of 75.
How long has Jack G. Guenther been practicing?
Jack Guenther graduated from medical school in 1990, 36 years ago.
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