Dr. Frederick D. Williams, MD
- Part D claims, 2023
- 39
- Industry payments
- $139
- Affiliated sites
- 1
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 1329 N H Street, San Bernardino, CA 92405
- Practice phone
- Call (909) 381-0803
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Central Neighborhood Health Foundation - H-Street Clinic
FQHC - Main Site · San Bernardino, California
Find Dr. Williams' 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. Frederick D. Williams is an ophthalmologist in San Bernardino, California
Dr. Williams practices at Central Neighborhood Health Foundation - H-Street Clinic in San Bernardino, California.
Dr. Williams' NPI, 1194797258, was assigned on February 3, 2006. Dr. Williams graduated from Pritzker School of Medicine in 1977. Dr. Williams' California license number on file is G41755.
- NPI
- 1194797258NPI Registry (opens in a new tab)
- NPI enumeration date
- February 3, 2006
- NPI status
- Active
- Practice phone
- (909) 381-0803
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1977
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Frederick D. Williams practices at Central Neighborhood Health Foundation - H-Street Clinic in San Bernardino, California
Dr. Williams' primary practice is Central Neighborhood Health Foundation - H-Street Clinic, at 1329 N H Street, San Bernardino, CA 92405. The practice phone is (909) 381-0803.
- Central Neighborhood Health Foundation - H-Street Clinic1329 N H Street, San Bernardino, CA 92405Phone(909) 381-0803
Source: Dmand AI Affiliation Data
Dr. Frederick D. Williams is affiliated with 1 site of care and 1 medical group
Dr. Williams' primary practice is Central Neighborhood Health Foundation - H-Street Clinic in San Bernardino, California. Dmand AI also links Dr. Williams to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Frederick D. Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Central Neighborhood Health Foundation - H-Street Clinic | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Frederick D. Williams is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Williams is board certified in ophthalmology by the American Board of Ophthalmology. Dmand AI has Dr. Williams' licenses on file in 2 states: California and Illinois.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
- Illinois license
Clinical focus
Dmand AI lists cold sores or genital herpes among the conditions Dr. Williams treats.
Ophthalmologists near Dr. Williams
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. Frederick D. Williams' patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 63, with 51% women.
Dr. Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women51%
- Men49%
Source: Dmand AI Patient Panel Data
Dr. Frederick D. Williams wrote 39 Medicare Part D claims in 2023
In 2023, Dr. Williams wrote 39 Medicare Part D claims. Every claim was for a generic drug. They cover 3 drugs, with $332 in total drug cost. In 2022, CMS named 309 claims across 11 drugs.
Dr. Williams' most prescribed drugs by claims, 2023
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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 3092023: 3987%
Drugs named by CMS: 3 in 2023, 11 in 2022.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Frederick D. Williams received $139 in industry payments from 2016 to 2020
CMS Open Payments shows 7 general payments to Dr. Williams from 5 drug and device companies from 2016 to 2020. Food and beverage make up the largest share, 100% of the total. Amarin Pharma Inc. paid the most, $47.
General payments to Dr. Williams by program year, 2016 to 2020
Companies that paid Dr. Williams the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Frederick D. Williams graduated from Pritzker School of Medicine
Dr. Williams graduated from Pritzker School of Medicine in 1977.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. Frederick D. Williams accepts plans from 2 insurance carriers
Dr. Williams is in network with 2 carriers, including Humana and Molina. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Humana
- Molina
Plan types Dr. Williams accepts, by number of carriers
- HMO1
- Medicare1
Source: Dmand AI Insurance Network Data
Sources for Dr. Frederick D. Williams'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 and Drug (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Frederick D. Williams
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. Frederick D. Williams' NPI number?
Dr. Frederick D. Williams' NPI number is 1194797258. It was assigned on February 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Frederick D. Williams?
Dr. Frederick D. Williams is an ophthalmologist in San Bernardino, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Frederick D. Williams practice?
Dr. Williams practices at 1329 N H Street, San Bernardino, CA 92405. Dr. Williams' primary practice is Central Neighborhood Health Foundation - H-Street Clinic in San Bernardino, California. Dmand AI also links Dr. Williams to 1 medical group.
What is Dr. Frederick D. Williams' office phone number?
The practice phone on file for Dr. Williams is (909) 381-0803.
What is Dr. Frederick D. Williams' medical license number?
Dr. Williams' California license number on file is G41755, one of the licenses on file in 2 states.
Which states has Dr. Frederick D. Williams been licensed in?
Dmand AI has state licenses on file for Dr. Williams in California (1980 to 2025) and Illinois (1978 to 1990).
Is Dr. Frederick D. Williams board certified?
Yes. Dr. Williams is board certified in ophthalmology by the American Board of Ophthalmology.
Where did Dr. Frederick D. Williams go to medical school?
Dr. Williams graduated from Pritzker School of Medicine in 1977.
What drugs does Dr. Frederick D. Williams prescribe most?
In 2023 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Hydrochlorothiazide, Atorvastatin Calcium and Amlodipine Besylate.
Has Dr. Frederick D. Williams received payments from drug or device companies?
CMS Open Payments shows $139 in general payments to Dr. Williams from 5 companies from 2016 to 2020. The largest total came from Amarin Pharma Inc.
How long has Dr. Frederick D. Williams been practicing?
Dr. Williams graduated from medical school in 1977, 49 years ago.
What insurance does Dr. Frederick D. Williams accept?
Dr. Williams is in network with 2 carriers, including Humana and Molina. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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