Dr. John R. Desnoyers, MD
- Medicare services, 2023
- 2,059
- Part D claims, 2021
- 35
- Affiliated sites
- 2
- Medical group
- 1
- State licenses
- 3
- Practice address
- 1520 N Mountain Ave, Ontario, CA 91762
- Practice phone
- Call (909) 949-9299
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Upland - Ontario Medical Clinic
Urgent Care Center · Ontario, California
Find Dr. Desnoyers' 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. John R. Desnoyers is an emergency medicine physician in Ontario, California
Dr. Desnoyers practices at Upland - Ontario Medical Clinic in Ontario, California.
Dr. Desnoyers' NPI, 1760423420, was assigned on June 10, 2006. Dr. Desnoyers graduated from Albany Medical College in 1993. Dr. Desnoyers' California license number on file is G81907.
- NPI
- 1760423420NPI Registry (opens in a new tab)
- NPI enumeration date
- June 10, 2006
- NPI status
- Active
- Practice phone
- (909) 949-9299
- 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; and Dmand AI Affiliation Data
Dr. John R. Desnoyers practices at Upland - Ontario Medical Clinic in Ontario, California
Dr. Desnoyers' primary practice is Upland - Ontario Medical Clinic, at 1520 N Mountain Ave, Ontario, CA 91762. The practice phone is (909) 949-9299.
- Upland - Ontario Medical Clinic1520 N Mountain Ave, Ontario, CA 91762Phone(909) 949-9299
Source: Dmand AI Affiliation Data
Dr. John R. Desnoyers is affiliated with 2 sites of care and 1 medical group
Dr. Desnoyers' primary practice is Upland - Ontario Medical Clinic in Ontario, California. The medical group on file is Concentra Urgent Care. Dmand AI also links Dr. Desnoyers to 1 more physician office, 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 R. Desnoyers' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Desnoyers practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Upland - Ontario Medical Clinic | Available with a free account |
| +1 more affiliated site | 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 each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John R. Desnoyers is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Desnoyers' primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Desnoyers is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Desnoyers' licenses on file in 3 states: California, Connecticut and Rhode Island.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
- Connecticut license
- Rhode Island license
Emergency medicine physicians near Dr. Desnoyers
Counts of emergency 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 R. Desnoyers billed Medicare for 2,059 services in 2023
CMS data shows 2,059 Medicare services from Dr. Desnoyers across 4 procedure codes in 2023. Medicare paid $227,538 for them. Every service was in an office.
Dr. Desnoyers' Medicare services by type, 2022 to 2023
- 2022
- 2023
- Tests and treatments
- 2022: 3,2692023: 99869%
- Office and hospital visits
- 2022: 3,2692023: 93971%
- Surgery
- 2022: 3902023: 12269%
Dr. Desnoyers compared with the California median for emergency medicine physicians, 2023
- Dr. Desnoyers
- California median
- Medicare services
- 2,059vs 2657.8 times
- Part D claims
- 35vs 6244% below
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Desnoyers' most billed Medicare procedure codes, 2023
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. Desnoyers?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Desnoyers and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John R. Desnoyers' patients have a median age of 54
Across all payers, Dmand AI patient panel data puts Dr. Desnoyers' median patient age at 54, with 42% women.
Dr. Desnoyers' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women42%
- Men58%
Source: Dmand AI Patient Panel Data
Dr. John R. Desnoyers wrote 35 Medicare Part D claims in 2021
In 2021, Dr. Desnoyers wrote 35 Medicare Part D claims. They cover 3 drugs, with $7,531 in total drug cost.
Dr. Desnoyers' most prescribed drugs by claims, 2021
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
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. John R. Desnoyers graduated from Albany Medical College
Dr. Desnoyers graduated from Albany Medical College in 1993.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Sources for Dr. John R. Desnoyers'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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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 R. Desnoyers
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 R. Desnoyers' NPI number?
Dr. John R. Desnoyers' NPI number is 1760423420. It was assigned on June 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John R. Desnoyers?
Dr. John R. Desnoyers is an emergency medicine physician in Ontario, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. John R. Desnoyers practice?
Dr. Desnoyers practices at 1520 N Mountain Ave, Ontario, CA 91762. Dr. Desnoyers' primary practice is Upland - Ontario Medical Clinic in Ontario, California. Dmand AI also links Dr. Desnoyers to 1 physician office.
What is Dr. John R. Desnoyers' office phone number?
The practice phone on file for Dr. Desnoyers is (909) 949-9299.
What is Dr. John R. Desnoyers' medical license number?
Dr. Desnoyers' California license number on file is G81907, one of the licenses on file in 3 states.
Which states has Dr. John R. Desnoyers been licensed in?
Dmand AI has state licenses on file for Dr. Desnoyers in California (1995 to 2025), Connecticut (2022 to 2026) and Rhode Island (2024 to 2026).
What medical group is Dr. John R. Desnoyers part of?
Dr. Desnoyers is linked to Concentra Urgent Care.
Does Dr. John R. Desnoyers accept Medicare?
Yes. CMS data shows Dr. Desnoyers billed Medicare for 2,059 services in 2023.
Is Dr. John R. Desnoyers board certified?
Yes. Dr. Desnoyers is board certified in emergency medicine by the American Board of Emergency Medicine.
What services does Dr. John R. Desnoyers bill to Medicare?
In 2023, Dr. Desnoyers' most billed Medicare services were health assessment (96116), home visit (99350) and surgery: skin and soft tissue (17000).
Show 3 more questionsShow fewer questions
Where did Dr. John R. Desnoyers go to medical school?
Dr. Desnoyers graduated from Albany Medical College in 1993.
What drugs does Dr. John R. Desnoyers prescribe most?
In 2021 Medicare Part D data, Dr. Desnoyers' most prescribed drugs by claims were Diclofenac Sodium, Eliquis and Metoprolol Succinate.
How long has Dr. John R. Desnoyers been practicing?
Dr. Desnoyers graduated from medical school in 1993, 33 years ago.
Selling to emergency medicine practices?
See emergency medicine physicians in California 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