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Dr. John Kao, MD
NPI1568780468
- Part D claims, 2024
- 7,579
- Publications
- 1
- Industry payments
- $413
- Affiliated sites
- 1
- Medical group
- 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. Kao's professional email, personal email and mobile number
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Dr. John Kao is an internist in Fontana, California
Dr. Kao practices at Fontana Medical Center in Fontana, California.
Dr. Kao's NPI, 1568780468, was assigned on May 17, 2010. Dr. Kao graduated from SUNY Downstate Health Sciences University in 2010. Dr. Kao holds California license A117555.
NPI and contact details
- NPI
- 1568780468NPI Registry (opens in a new tab)
- NPI enumeration date
- May 17, 2010
- NPI status
- Active
- Practice phone
- (909) 427-3910
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. John Kao practices at Fontana Medical Center in Fontana, California
Dr. Kao'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. John Kao is affiliated with 2 sites of care and 1 medical group
Dr. Kao'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. Kao to 1 more group practice or clinic, named with a free account.
Fontana Medical CenterPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John Kao's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Kao 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. John Kao is one of 16,751 internists in California
Internal medicine is Dr. Kao's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Kao is board certified in internal medicine by the American Board of Internal Medicine. Dr. Kao is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Kao
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. John Kao's patients have a median age of 51
Across all payers, Dmand AI patient panel data puts Dr. Kao's median patient age at 51, with 53% women.
Dr. Kao's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women53%
- Men47%
Source: Dmand AI Patient Panel Data
Dr. John Kao wrote 7,579 Medicare Part D claims in 2024
In 2024, Dr. Kao wrote 7,579 Medicare Part D claims for 842 patients. 90% of them were for generic drugs. CMS names the drug for 7,010 of them, across 108 drugs with 11 or more claims each, at $287,924 in total drug cost. In 2023, CMS named 6,931 claims across 116 drugs.
Part D claims, 20247,579
Drugs named by CMS108
Total drug cost$287,924
Part D patients842
Dr. Kao's Part D claims by kind of drug, 2024
- Generic6,819 claims90%
- Brand-name635 claims8%
- Other125 claims2%
Dr. Kao'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. Kao's Part D claims, 2024
- Opioids7%548 of 7,579 claims
- Antibiotics3%216 of 7,579 claims
- Antipsychotics, patients 65 and over0%30 of 7,579 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: 6,9312024: 7,0101%
Drugs named by CMS: 108 in 2024, 116 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
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Dr. John Kao has 1 publication on record
Dmand AI links 1 paper to Dr. Kao in 2018. Dr. Kao's most frequent co-author is David Yates Graham, MD.
Papers1
Dr. Kao's most frequent co-authors
Recent publications by Dr. Kao
See who Dr. Kao researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Kao works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Kao received $413 in industry payments from 2017 to 2025
CMS Open Payments shows 7 general payments to Dr. Kao from 4 drug and device companies from 2017 to 2025. Food and beverage make up the largest share, 100% of the total. Medtronic Vascular, Inc. paid the most, $170.
General payments to Dr. Kao by program year, 2017 to 2025
Companies that paid Dr. Kao the most, 2017 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Kao graduated from SUNY Downstate Health Sciences University
Dr. Kao graduated from SUNY Downstate Health Sciences University in 2010.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. John Kao accepts plans from 2 insurance carriers
Dr. Kao is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Kao accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. John Kao'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 Data |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. John Kao
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 Kao's NPI number?
Dr. John Kao's NPI number is 1568780468. It was assigned on May 17, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. John Kao?
Dr. John Kao is an internist in Fontana, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John Kao practice?
Dr. Kao practices at 9961 Sierra Ave, Fontana, CA 92335. Dr. Kao's primary practice is Fontana Medical Center in Fontana, California. Dmand AI also links Dr. Kao to 1 group practice or clinic.
What is Dr. John Kao's office phone number?
The practice phone on file for Dr. Kao is (909) 427-3910.
What is Dr. John Kao's medical license number?
Dr. Kao holds California license A117555.
What medical group is Dr. John Kao part of?
Dr. Kao is linked to Southern California Permanente Medical Group.
Is Dr. John Kao board certified?
Yes. Dr. Kao is board certified in internal medicine by the American Board of Internal Medicine.
Where did Dr. John Kao go to medical school?
Dr. Kao graduated from SUNY Downstate Health Sciences University in 2010.
What drugs does Dr. John Kao prescribe most?
In 2024 Medicare Part D data, Dr. Kao's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Lisinopril.
Has Dr. John Kao received payments from drug or device companies?
CMS Open Payments shows $413 in general payments to Dr. Kao from 4 companies from 2017 to 2025. The largest total came from Medtronic Vascular, Inc.
Show 4 more questionsShow fewer questions
How long has Dr. John Kao been practicing?
Dr. Kao graduated from medical school in 2010, 16 years ago.
Does Dr. John Kao do research?
Dmand AI links 1 publication to Dr. Kao.
Who does Dr. John Kao publish with?
Dr. Kao's most frequent co-authors are David Yates Graham, MD (1 shared paper).
What insurance does Dr. John Kao accept?
Dr. Kao is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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