Dr. Stephen M. Simon, MD
- Medicare services, 2021
- 1,996
- Hospital affiliations
- 1
- Industry payments
- $80
- Medical group
- 1
- State license
- 1
- Practice address
- 214 W E St, Ontario, CA 91762
- Practice phone
- Call (909) 548-3858
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mission Adult Day Health Care Center
Ontario, California
Find Dr. Simon'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.
Dr. Stephen M. Simon is a diagnostic radiologist in Ontario, California
Dr. Simon practices at Mission Adult Day Health Care Center in Ontario, California.
Dr. Simon's NPI, 1285618389, was assigned on December 1, 2005. Dr. Simon graduated from Keck School of Medicine of USC in 1982. Dr. Simon holds California license G50753.
- NPI
- 1285618389NPI Registry (opens in a new tab)
- NPI enumeration date
- December 1, 2005
- NPI status
- Active
- Practice phone
- (909) 548-3858
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Stephen M. Simon practices at Mission Adult Day Health Care Center in Ontario, California
Dr. Simon's primary practice is Mission Adult Day Health Care Center, at 214 W E St, Ontario, CA 91762 in San Bernardino County. The practice phone is (909) 548-3858.
- Mission Adult Day Health Care Center214 W E St, Ontario, CA 91762 · San Bernardino CountyPhone(909) 548-3858
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stephen M. Simon is affiliated with 2 sites of care and 1 medical group
Dr. Simon's primary practice is Mission Adult Day Health Care Center in Ontario, California. Dr. Simon is also affiliated with Providence Mission Hospital. The medical group on file is Coast Radiology.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stephen M. Simon's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Simon practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mission Adult Day Health Care Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen M. Simon is one of 4,096 diagnostic radiologists in California
Diagnostic radiology is Dr. Simon's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dr. Simon is board certified in diagnostic radiology by the American Board of Radiology. Dr. Simon is licensed in California.
Specialties and state licenses
- Diagnostic radiology, CaliforniaPrimary
Diagnostic radiologists near Dr. Simon
Counts of diagnostic radiologists 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. Stephen M. Simon billed Medicare for 1,996 services in 2021
CMS data shows 1,996 Medicare services from Dr. Simon across 12 procedure codes in 2021. Medicare paid $61,945 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Simon's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Imaging
- 2020: 2,1442021: 1,71120%
- Other services
- 2020: 2352021: 2465%
- Surgery
- 2020: 312021: 3926%
Dr. Simon compared with the California median for diagnostic radiologists, 2021
- Dr. Simon
- California median
- Medicare services
- 1,996vs 2,28112% below
Medians across 3,734 diagnostic radiologists in California with Dmand AI profiles that report each measure.
Dr. Simon's most billed Medicare procedure codes, 2021
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. Simon and other diagnostic radiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen M. Simon's patients have a median age of 44
Across all payers, Dmand AI patient panel data puts Dr. Simon's median patient age at 44, with 50% women.
Dr. Simon's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
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Dr. Stephen M. Simon received $80 in industry payments from 2016 to 2018
CMS Open Payments shows 3 general payments to Dr. Simon from 3 drug and device companies from 2016 to 2018. Food and beverage make up the largest share, 100% of the total. Leica Microsystems Inc. paid the most, $34.
General payments to Dr. Simon by program year, 2016 to 2018
Companies that paid Dr. Simon the most, 2016 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stephen M. Simon graduated from Keck School of Medicine of USC
Dr. Simon graduated from Keck School of Medicine of USC in 1982.
- Medical school
- Board certified in diagnostic radiology
Source: Dmand AI Professional Profile Data
Sources for Dr. Stephen M. Simon'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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 |
| 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. Stephen M. Simon
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. Stephen M. Simon's NPI number?
Dr. Stephen M. Simon's NPI number is 1285618389. It was assigned on December 1, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen M. Simon?
Dr. Stephen M. Simon is a diagnostic radiologist in Ontario, California. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Dr. Stephen M. Simon practice?
Dr. Simon practices at 214 W E St, Ontario, CA 91762. Dr. Simon's primary practice is Mission Adult Day Health Care Center in Ontario, California.
What is Dr. Stephen M. Simon's office phone number?
The practice phone on file for Dr. Simon is (909) 548-3858.
What is Dr. Stephen M. Simon's medical license number?
Dr. Simon holds California license G50753.
Which hospitals is Dr. Stephen M. Simon affiliated with?
Dr. Simon is affiliated with Providence Mission Hospital.
What medical group is Dr. Stephen M. Simon part of?
Dr. Simon is linked to Coast Radiology.
Does Dr. Stephen M. Simon accept Medicare?
Yes. CMS data shows Dr. Simon billed Medicare for 1,996 services in 2021.
Is Dr. Stephen M. Simon board certified?
Yes. Dr. Simon is board certified in diagnostic radiology by the American Board of Radiology.
What services does Dr. Stephen M. Simon bill to Medicare?
In 2021, Dr. Simon's most billed Medicare services were radiation oncology (77080), radiation oncology (77067) and radiation oncology (77063).
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Where did Dr. Stephen M. Simon go to medical school?
Dr. Simon graduated from Keck School of Medicine of USC in 1982.
Has Dr. Stephen M. Simon received payments from drug or device companies?
CMS Open Payments shows $80 in general payments to Dr. Simon from 3 companies from 2016 to 2018. The largest total came from Leica Microsystems Inc.
How long has Dr. Stephen M. Simon been practicing?
Dr. Simon graduated from medical school in 1982, 44 years ago.
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