Dr. Kok-Fon K. Lee, MD
- Medicare services, 2019
- 20
- Medicare patients, 2024
- 22
- Part D claims, 2024
- 8,151
- Industry payments
- $20
- Affiliated sites
- 1
- Practice address
- 9961 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-3910
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Fontana Medical Center
Fontana, California
Find Dr. Lee'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. Kok-Fon K. Lee is an internist in Fontana, California
Dr. Lee practices at Fontana Medical Center in Fontana, California.
Dr. Lee's NPI, 1154561900, was assigned on March 5, 2009. Dr. Lee holds California license A106497.
- NPI
- 1154561900NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5294923892
- NPI enumeration date
- March 5, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (909) 427-3910
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kok-Fon K. Lee practices at Fontana Medical Center in Fontana, California
Dr. Lee's primary practice is Fontana Medical Center, at 9961 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-3910.
- Fontana Medical Center9961 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-3910
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Kok-Fon K. Lee is affiliated with 2 sites of care and 1 medical group
Dr. Lee's primary practice is Fontana Medical Center in Fontana, California. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links Dr. Lee to 1 more group practice or clinic, 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 Dr. Kok-Fon K. Lee's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lee practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fontana Medical 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. Kok-Fon K. Lee is one of 16,751 internists in California
Internal medicine is Dr. Lee's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Lee is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Lee
Counts of internists 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. Kok-Fon K. Lee billed Medicare for 20 services in 2019
CMS data shows 20 Medicare services from Dr. Lee across 1 procedure code in 2019, all of them office visits, for 22 Medicare patients. Medicare paid $654 for them. Every service was in an office.
Dr. Lee compared with the California median for internists, 2019
- Dr. Lee
- California median
- Medicare services
- 20vs 36194% below
- Medicare patients
- 22vs 15185% below
- Part D claims
- 7,471vs 42117.7 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Lee's most billed Medicare procedure codes, 2019
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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kok-Fon K. Lee treated 22 Medicare patients in 2024, average age 63
CMS counts 22 Medicare patients who saw Dr. Lee in 2024. The largest group is 65 to 74, with 11 patients. 64% of them have high cholesterol, and 59% have high blood pressure. Their average risk score is 2.66, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Lee's median patient age at 43, with 72% women.
Dr. Lee's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Lee's Medicare patients, 2024
- High cholesterol64%
- High blood pressure59%
- Diabetes50%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lee's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 43
Patient panel by sex, all payers
- Women72%
- Men28%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Kok-Fon K. Lee wrote 8,151 Medicare Part D claims in 2024
In 2024, Dr. Lee wrote 8,151 Medicare Part D claims for 1,314 patients. 89% of them were for generic drugs. CMS names the drug for 7,471 of them, across 104 drugs with 11 or more claims each, at $334,183 in total drug cost. In 2023, CMS named 7,601 claims across 108 drugs.
Dr. Lee's Part D claims by kind of drug, 2024
- Generic7,253 claims89%
- Brand-name747 claims9%
- Other151 claims2%
Dr. Lee's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Lee's Part D claims, 2024
- Opioids5%368 of 8,151 claims
- Antibiotics3%209 of 8,151 claims
- Antipsychotics, patients 65 and over0%11 of 8,151 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 7,6012024: 7,4712%
Drugs named by CMS: 104 in 2024, 108 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Kok-Fon K. Lee offers telehealth to Medicare patients
Dr. Lee accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Lee as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Kok-Fon K. Lee received $20 in industry payments in 2022
CMS Open Payments shows 1 general payment to Dr. Lee from 1 drug or device company in 2022. Food and beverage make up the largest share, 100% of the total. Endo Pharmaceuticals Inc. paid the most, $20.
Companies that paid Dr. Lee the most, 2022 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Kok-Fon K. Lee'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 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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 Dr. Kok-Fon K. Lee
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. Kok-Fon K. Lee's NPI number?
Dr. Kok-Fon K. Lee's NPI number is 1154561900. It was assigned on March 5, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Kok-Fon K. Lee?
Dr. Kok-Fon K. Lee is an internist in Fontana, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Kok-Fon K. Lee practice?
Dr. Lee practices at 9961 Sierra Ave, Fontana, CA 92335. Dr. Lee's primary practice is Fontana Medical Center in Fontana, California. Dmand AI also links Dr. Lee to 1 group practice or clinic.
What is Dr. Kok-Fon K. Lee's office phone number?
The practice phone on file for Dr. Lee is (909) 427-3910.
What is Dr. Kok-Fon K. Lee's medical license number?
Dr. Lee holds California license A106497.
What medical group is Dr. Kok-Fon K. Lee part of?
Dr. Lee is linked to Southern California Permanente Medical Group.
Does Dr. Kok-Fon K. Lee accept Medicare?
Yes. CMS data shows Dr. Lee billed Medicare for 20 services in 2019, and Dr. Lee accepts Medicare assignment.
Does Dr. Kok-Fon K. Lee offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Lee as offering telehealth services.
How many Medicare patients does Dr. Kok-Fon K. Lee see?
CMS counts 22 Medicare patients who saw Dr. Lee in 2024, with an average age of 63.
What services does Dr. Kok-Fon K. Lee bill to Medicare?
In 2019, Dr. Lee's most billed Medicare services were office visit, established patient (99213).
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What drugs does Dr. Kok-Fon K. Lee prescribe most?
In 2024 Medicare Part D data, Dr. Lee's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Amlodipine Besylate.
Has Dr. Kok-Fon K. Lee received payments from drug or device companies?
CMS Open Payments shows $20 in general payments to Dr. Lee from 1 company from 2022 to 2022. The largest total came from Endo Pharmaceuticals Inc.
How long has Dr. Kok-Fon K. Lee been practicing?
Dr. Lee graduated from medical school in 1988, 38 years ago.
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