John C. Mason, DDS
- Part D claims, 2024
- 277
- Hospital affiliations
- 1
- Industry payments
- $25
- Medical group
- 1
- State license
- 1
- Practice address
- 300 Randall Rd, Geneva, IL 60134
- Practice phone
- Call (630) 208-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find John Mason'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.
John C. Mason is a general practice dentistry in Geneva, Illinois
John Mason practices at Northwestern Medicine Delnor Hospital in Geneva, Illinois, part of Northwestern Memorial HealthCare.
John Mason's NPI, 1326167511, was assigned on March 28, 2007. John Mason holds Illinois license 19020535.
- NPI
- 1326167511NPI Registry (opens in a new tab)
- NPI enumeration date
- March 28, 2007
- NPI status
- Active
- Practice phone
- (630) 208-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
John C. Mason practices at Northwestern Medicine Delnor Hospital in Geneva, Illinois
John Mason's primary practice is Northwestern Medicine Delnor Hospital, at 300 Randall Rd, Geneva, IL 60134 in Kane County. The practice phone is (630) 208-3000.
- Northwestern Medicine Delnor Hospital300 Randall Rd, Geneva, IL 60134 · Kane CountyPhone(630) 208-3000
Source: Dmand AI Affiliation Data
John C. Mason is affiliated with 2 sites of care and 1 medical group
John Mason's primary practice is Northwestern Medicine Delnor Hospital in Geneva, Illinois, part of Northwestern Memorial HealthCare. Dmand AI also links John Mason to 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 John C. Mason's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Mason practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Medicine Delnor Hospital | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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John C. Mason is one of 2,353 general practice dentistrys in Illinois
General practice is John Mason's primary specialty in the NPI Registry, under taxonomy code 1223G0001X. John Mason is licensed in Illinois.
Specialties and state licenses
- General practice dentistry, IllinoisPrimary
General practice dentistrys near John Mason
Counts of general practice dentistrys 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
John C. Mason's patients have a median age of 28
Across all payers, Dmand AI patient panel data puts John Mason's median patient age at 28, with 50% women.
John Mason's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 28
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
John C. Mason wrote 277 Medicare Part D claims in 2024
In 2024, John Mason wrote 277 Medicare Part D claims for 154 patients. 98% of them were for generic drugs.
John Mason's Part D claims by kind of drug, 2024
- Generic271 claims98%
- Brand-name and other6 claims2%
Drug classes CMS tracks in John Mason's Part D claims, 2024
- Antibiotics69%192 of 277 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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John C. Mason received $25 in industry payments in 2025
CMS Open Payments shows 1 general payment to John Mason from 1 drug or device company in 2025. Education make up the largest share, 100% of the total. Septodont Inc. paid the most, $25.
Companies that paid John Mason the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for John C. Mason'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (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 John C. Mason
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John C. Mason's NPI number?
John C. Mason's NPI number is 1326167511. It was assigned on March 28, 2007, and it is active in the NPI Registry.
What does John C. Mason specialize in?
John C. Mason is a general practice dentistry in Geneva, Illinois. The primary specialty in the NPI Registry is General Practice Dentistry (taxonomy code 1223G0001X).
Where does John C. Mason practice?
John Mason practices at 300 Randall Rd, Geneva, IL 60134. John Mason's primary practice is Northwestern Medicine Delnor Hospital in Geneva, Illinois, part of Northwestern Memorial HealthCare. Dmand AI also links John Mason to 1 group practice or clinic and 1 medical group.
What is John C. Mason's office phone number?
The practice phone on file for John Mason is (630) 208-3000.
What is John C. Mason's medical license number?
John Mason holds Illinois license 19020535.
Which hospitals is John C. Mason affiliated with?
John Mason practices at Northwestern Medicine Delnor Hospital in Geneva, Illinois.
Has John C. Mason received payments from drug or device companies?
CMS Open Payments shows $25 in general payments to John Mason from 1 company from 2025 to 2025. The largest total came from Septodont Inc.
How long has John C. Mason been practicing?
John Mason's NPI was assigned in 2007.
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