Dr. John Alan Demask, DO
- Medicare services, 2024
- 1,076
- Medicare patients, 2024
- 245
- Part D claims, 2024
- 4,293
- Hospital affiliations
- 2
- State license
- 1
- Practice address
- 506 E State Parkway, Schaumburg, IL 60173
- Practice phone
- Call (847) 885-2010
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Schaumburg Laboratory Facility
Clinical Lab - Full Service · Schaumburg, Illinois
Find Dr. Demask's professional email, personal email and mobile number
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Dr. John Alan Demask is a family medicine physician in Schaumburg, Illinois
Dr. Demask practices at Schaumburg Laboratory Facility in Schaumburg, Illinois.
Dr. Demask's NPI, 1174501134, was assigned on January 9, 2006. Dr. Demask graduated from Chicago College of Osteopathy in 1993. Dr. Demask holds Illinois license 036094869.
- NPI
- 1174501134NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2466433859
- NPI enumeration date
- January 9, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (847) 885-2010
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Alan Demask practices at Schaumburg Laboratory Facility in Schaumburg, Illinois
Dr. Demask's primary practice is Schaumburg Laboratory Facility, at 506 E State Parkway, Schaumburg, IL 60173. The practice phone is (847) 885-2010.
- Schaumburg Laboratory Facility506 E State Parkway, Schaumburg, IL 60173Phone(847) 885-2010
Source: Dmand AI Affiliation Data
Dr. John Alan Demask is affiliated with 6 sites of care
Dr. Demask's primary practice is Schaumburg Laboratory Facility in Schaumburg, Illinois. Dr. Demask is also affiliated with Saint Joseph Medical Center. Dmand AI also links Dr. Demask to 1 more hospital, 2 home health agencies and 1 physician office, 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. John Alan Demask's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Demask practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Schaumburg Laboratory Facility | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Alan Demask is one of 5,105 family medicine physicians in Illinois
Family medicine is Dr. Demask's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Demask is licensed in Illinois.
Specialties and state licenses
- Family medicine, IllinoisPrimary
Family medicine physicians near Dr. Demask
Counts of family medicine physicians 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. John Alan Demask billed Medicare for 1,076 services in 2024
CMS data shows 1,076 Medicare services from Dr. Demask across 6 procedure codes in 2024, for 245 Medicare patients. Medicare paid $61,933 for them. Every service was in an office.
Dr. Demask's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4732024: 76462%
- Surgery
- 2023: 2042024: 22611%
- Other services
- 2023: 912024: 865%
Dr. Demask compared with the Illinois median for family medicine physicians, 2024
- Dr. Demask
- Illinois median
- Medicare services
- 1,076vs 3563.0 times
- Medicare patients
- 245vs 16053% above
- Part D claims
- 3,817vs 6186.2 times
Medians across 5,015 family medicine physicians in Illinois with Dmand AI profiles that report each measure.
Dr. Demask's 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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Demask and other family medicine physicians in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Alan Demask treated 245 Medicare patients in 2024, average age 73
CMS counts 245 Medicare patients who saw Dr. Demask in 2024. The largest group is 65 to 74, with 144 patients. 73% of them have high blood pressure, and 48% have high cholesterol. 4% are also on Medicaid. Their average risk score is 0.78, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Demask's median patient age at 63, with 41% women.
Dr. Demask's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Demask's Medicare patients by sex, 2024
- Women10744%
- Men13856%
Chronic conditions among Dr. Demask's Medicare patients, 2024
- High blood pressure73%
- High cholesterol48%
- Arthritis28%
- Diabetes22%
- Ischemic heart disease18%
- Atrial fibrillation15%
- Anxiety13%
- Cancer11%
Share of Medicare patients with each condition. A patient can have several.
Dr. Demask's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women41%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Alan Demask wrote 4,293 Medicare Part D claims in 2024
In 2024, Dr. Demask wrote 4,293 Medicare Part D claims for 303 patients. 95% of them were for generic drugs. CMS names the drug for 3,817 of them, across 76 drugs with 11 or more claims each, at $81,124 in total drug cost. In 2023, CMS named 3,284 claims across 69 drugs.
Dr. Demask's Part D claims by kind of drug, 2024
- Generic4,077 claims95%
- Brand-name and other216 claims5%
Dr. Demask's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Demask's Part D claims, 2024
- Opioids4%166 of 4,293 claims
- Antibiotics4%185 of 4,293 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,2842024: 3,81716%
Drugs named by CMS: 76 in 2024, 69 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. John Alan Demask takes part in Medicare
Dr. Demask 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)
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Dr. John Alan Demask graduated from Chicago College of Osteopathy
Dr. Demask graduated from Chicago College of Osteopathy in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Alan Demask'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)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) |
| 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. John Alan Demask
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. John Alan Demask's NPI number?
Dr. John Alan Demask's NPI number is 1174501134. It was assigned on January 9, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Alan Demask?
Dr. John Alan Demask is a family medicine physician in Schaumburg, Illinois. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. John Alan Demask practice?
Dr. Demask practices at 506 E State Parkway, Schaumburg, IL 60173. Dr. Demask's primary practice is Schaumburg Laboratory Facility in Schaumburg, Illinois. Dmand AI also links Dr. Demask to 1 hospital, 2 home health agencies and 1 physician office.
What is Dr. John Alan Demask's office phone number?
The practice phone on file for Dr. Demask is (847) 885-2010.
What is Dr. John Alan Demask's medical license number?
Dr. Demask holds Illinois license 036094869.
Which hospitals is Dr. John Alan Demask affiliated with?
Dr. Demask is affiliated with Saint Joseph Medical Center. Dmand AI links Dr. Demask to 1 more hospital.
Does Dr. John Alan Demask accept Medicare?
Yes. CMS data shows Dr. Demask billed Medicare for 1,076 services in 2024, and Dr. Demask accepts Medicare assignment.
How many Medicare patients does Dr. John Alan Demask see?
CMS counts 245 Medicare patients who saw Dr. Demask in 2024, with an average age of 73.
What services does Dr. John Alan Demask bill to Medicare?
In 2024, Dr. Demask's most billed Medicare services were office visit, established patient (99214), care management and other visits (99490) and surgery: heart and blood vessels (36415).
Where did Dr. John Alan Demask go to medical school?
Dr. Demask graduated from Chicago College of Osteopathy in 1993.
What drugs does Dr. John Alan Demask prescribe most?
In 2024 Medicare Part D data, Dr. Demask's most prescribed drugs by claims were Amlodipine Besylate, Levothyroxine Sodium and Hydrochlorothiazide.
How long has Dr. John Alan Demask been practicing?
Dr. Demask graduated from medical school in 1993, 33 years ago.
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