Douglas J. Leo, OD
- Medicare patients, 2024
- 40
- Industry payments
- $85
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 155 N 2nd Ave, Upland, CA 91786
- Practice phone
- Call (909) 350-1524
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Fontana Optometric Group, Inc.
Upland, California
Find Douglas Leo'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.
Douglas J. Leo is an optometrist in Upland, California
Douglas Leo practices at Fontana Optometric Group, Inc. in Upland, California.
Douglas Leo's NPI, 1215012869, was assigned on October 25, 2006. Douglas Leo holds California license 06988.
- NPI
- 1215012869NPI Registry (opens in a new tab)
- NPI enumeration date
- October 25, 2006
- NPI status
- Active
- Practice phone
- (909) 350-1524
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 72
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Douglas J. Leo practices at Fontana Optometric Group, Inc. in Upland, California
Douglas Leo's primary practice is Fontana Optometric Group, Inc., at 155 N 2nd Ave, Upland, CA 91786 in San Bernardino County. The practice phone is (909) 350-1524.
- Fontana Optometric Group, Inc.155 N 2nd Ave, Upland, CA 91786 · San Bernardino CountyPhone(909) 350-1524
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Douglas J. Leo is affiliated with 2 sites of care and 1 medical group
Douglas Leo's primary practice is Fontana Optometric Group, Inc. in Upland, California. Dmand AI also links Douglas Leo to 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Douglas J. Leo's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Douglas Leo practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fontana Optometric Group, Inc. | 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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Douglas J. Leo is one of 7,206 optometrists in California
Optometrist is Douglas Leo's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Douglas Leo is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Douglas Leo
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
Douglas J. Leo treated 40 Medicare patients in 2024, average age 78
CMS counts 40 Medicare patients who saw Douglas Leo in 2024. The largest group is 75 to 84, with 19 patients. 75% of them have high cholesterol, and 73% have high blood pressure. Their average risk score is 1.01, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Douglas Leo's median patient age at 73, with 65% women.
Douglas Leo's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Douglas Leo's Medicare patients by sex, 2024
- Women2255%
- Men1845%
Chronic conditions among Douglas Leo's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Arthritis40%
- Ischemic heart disease35%
Share of Medicare patients with each condition. A patient can have several.
Douglas Leo's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women65%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Douglas J. Leo received $85 in industry payments in 2025
CMS Open Payments shows 1 general payment to Douglas Leo from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $85.
Companies that paid Douglas Leo 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 Douglas J. Leo'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 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) |
| 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 Douglas J. Leo
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Douglas J. Leo's NPI number?
Douglas J. Leo's NPI number is 1215012869. It was assigned on October 25, 2006, and it is active in the NPI Registry.
What does Douglas J. Leo specialize in?
Douglas J. Leo is an optometrist in Upland, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Douglas J. Leo practice?
Douglas Leo practices at 155 N 2nd Ave, Upland, CA 91786. Douglas Leo's primary practice is Fontana Optometric Group, Inc. in Upland, California. Dmand AI also links Douglas Leo to 1 group practice or clinic and 1 medical group.
What is Douglas J. Leo's office phone number?
The practice phone on file for Douglas Leo is (909) 350-1524.
What is Douglas J. Leo's medical license number?
Douglas Leo holds California license 06988.
How many Medicare patients does Douglas J. Leo see?
CMS counts 40 Medicare patients who saw Douglas Leo in 2024, with an average age of 78.
Has Douglas J. Leo received payments from drug or device companies?
CMS Open Payments shows $85 in general payments to Douglas Leo from 1 company from 2025 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Douglas J. Leo been practicing?
Douglas Leo graduated from medical school in 1980, 46 years ago.
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