Dr. John Frederick Riedel, MD
- Medicare services, 2022
- 39
- Part D claims, 2022
- 67
- Industry payments
- $654
- Insurance carriers
- 4
- State license
- 1
- Practice address
- 112 La Casa Via, Walnut Creek, CA 94598
- Practice phone
- Call (925) 934-6300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Riedel's professional email, personal email and mobile number
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Dr. John Frederick Riedel is an ophthalmologist in Walnut Creek, California
Dr. Riedel practices in Walnut Creek, California.
Dr. Riedel's NPI, 1205892825, was assigned on April 22, 2006. Dr. Riedel graduated from UCSF School of Medicine in 1969. Dr. Riedel's California license number on file is 00A239850.
- NPI
- 1205892825NPI Registry (opens in a new tab)
- NPI enumeration date
- April 22, 2006
- NPI status
- Active
- Practice phone
- (925) 934-6300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 83
- Medical school graduation
- 1969
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. John Frederick Riedel's practice address is in Walnut Creek, California
Dr. Riedel's practice address in the NPI Registry is 112 La Casa Via, Walnut Creek, CA 94598. The practice phone is (925) 934-6300.
- NPI Registry address112 La Casa Via, Walnut Creek, CA 94598Phone(925) 934-6300
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. John Frederick Riedel's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Riedel practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Riedel's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Frederick Riedel is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Riedel's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Riedel is board certified in ophthalmology by the American Board of Ophthalmology. Dr. Riedel has a license on file in California.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
Ophthalmologists near Dr. Riedel
Counts of ophthalmologists 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 Frederick Riedel billed Medicare for 39 services in 2022
CMS data shows 39 Medicare services from Dr. Riedel across 1 procedure code in 2022. Medicare paid $1,521 for them. Every service was in an office.
Dr. Riedel's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Tests and treatments
- 2021: 8642022: 3995%
Dr. Riedel compared with the California median for ophthalmologists, 2022
- Dr. Riedel
- California median
- Medicare services
- 39vs 1,07996% below
- Part D claims
- 67vs 61889% below
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Riedel's most billed Medicare procedure codes, 2022
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. Riedel and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Frederick Riedel's patients have a median age of 78
Across all payers, Dmand AI patient panel data puts Dr. Riedel's median patient age at 78, with 72% women.
Dr. Riedel's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 78
Patient panel by sex, all payers
- Women72%
- Men25%
Source: Dmand AI Patient Panel Data
Dr. John Frederick Riedel wrote 67 Medicare Part D claims in 2022
In 2022, Dr. Riedel wrote 67 Medicare Part D claims. They cover 4 drugs, with $23,918 in total drug cost. In 2021, CMS named 328 claims across 8 drugs.
Dr. Riedel's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 3282022: 6780%
Drugs named by CMS: 4 in 2022, 8 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. John Frederick Riedel received $654 in industry payments from 2016 to 2021
CMS Open Payments shows 25 general payments to Dr. Riedel from 8 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 88% of the total. Allergan Inc. paid the most, $220.
General payments to Dr. Riedel by program year, 2016 to 2021
General payments to Dr. Riedel by kind, 2016 to 2021
- Food and beverage$57888%
- Education$7512%
Companies that paid Dr. Riedel the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Frederick Riedel has 1 award and honors on record
Dmand AI lists 1 award for Dr. Riedel.
Awards and honors for Dr. Riedel
- Undated
- Checkbook Top Doc
Source: Dmand AI Professional Profile Data
Dr. John Frederick Riedel graduated from UCSF School of Medicine
Dr. Riedel graduated from UCSF School of Medicine in 1969.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. John Frederick Riedel accepts plans from 4 insurance carriers
Dr. Riedel is in network with 4 carriers, including Blue Cross Blue Shield of Massachusetts, Blue Cross Blue Shield of Michigan and HCSC. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Massachusetts
- Blue Cross Blue Shield of Michigan
- HCSC
- Regence Health Plans
Plan types Dr. Riedel accepts, by number of carriers
- Medicare4
- PPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. John Frederick Riedel'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 |
| 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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 Frederick Riedel
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 Frederick Riedel's NPI number?
Dr. John Frederick Riedel's NPI number is 1205892825. It was assigned on April 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Frederick Riedel?
Dr. John Frederick Riedel is an ophthalmologist in Walnut Creek, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. John Frederick Riedel practice?
Dr. Riedel practices at 112 La Casa Via, Walnut Creek, CA 94598.
What is Dr. John Frederick Riedel's office phone number?
The practice phone on file for Dr. Riedel is (925) 934-6300.
What is Dr. John Frederick Riedel's medical license number?
Dr. Riedel's California license number on file is 00A239850.
Does Dr. John Frederick Riedel accept Medicare?
Yes. CMS data shows Dr. Riedel billed Medicare for 39 services in 2022.
Is Dr. John Frederick Riedel board certified?
Yes. Dr. Riedel is board certified in ophthalmology by the American Board of Ophthalmology.
What services does Dr. John Frederick Riedel bill to Medicare?
In 2022, Dr. Riedel's most billed Medicare services were eye exam or test (92014).
Where did Dr. John Frederick Riedel go to medical school?
Dr. Riedel graduated from UCSF School of Medicine in 1969.
What drugs does Dr. John Frederick Riedel prescribe most?
In 2022 Medicare Part D data, Dr. Riedel's most prescribed drugs by claims were Latanoprost, Timolol Maleate and Restasis.
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Has Dr. John Frederick Riedel received payments from drug or device companies?
CMS Open Payments shows $654 in general payments to Dr. Riedel from 8 companies from 2016 to 2021. The largest total came from Allergan Inc.
How long has Dr. John Frederick Riedel been practicing?
Dr. Riedel graduated from medical school in 1969, 57 years ago.
What insurance does Dr. John Frederick Riedel accept?
Dr. Riedel is in network with 4 carriers, including Blue Cross Blue Shield of Massachusetts, Blue Cross Blue Shield of Michigan and HCSC. Medicare plans come from the most carriers, 4. Check the plan with the practice before a visit.
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