Dr. Hiroshi Kan Katsumi, MD
- Medicare patients, 2024
- 14
- Part D claims, 2024
- 1,729
- Hospital affiliations
- 2
- Industry payments
- $398
- Medical group
- 1
- Practice address
- 9961 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Katsumi's professional email, personal email and mobile number
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Dr. Hiroshi Kan Katsumi is a urologist in Fontana, California
Dr. Katsumi practices at Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
Dr. Katsumi's NPI, 1124297395, was assigned on February 21, 2008. Dr. Katsumi graduated from Tufts University School of Medicine in 2003. Dr. Katsumi holds California license A93331.
- NPI
- 1124297395NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3173682622
- NPI enumeration date
- February 21, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (909) 427-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Hiroshi Kan Katsumi practices at Fontana Medical Center in Fontana, California
Dr. Katsumi's primary practice is Fontana Medical Center, at 9961 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-5000.
- Fontana Medical Center9961 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-5000
Source: Dmand AI Affiliation Data
Dr. Hiroshi Kan Katsumi is affiliated with 2 sites of care and 1 medical group
Dr. Katsumi's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente. Dr. Katsumi is also affiliated with UCI Health - Orange. The medical group on file is Southern California Permanente Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Hiroshi Kan Katsumi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Katsumi practices, 2 sites in all. 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. Hiroshi Kan Katsumi is one of 1,395 urologists in California
Urology is Dr. Katsumi's primary specialty in the NPI Registry, under taxonomy code 208800000X. Dr. Katsumi is licensed in California.
Specialties and state licenses
- Urology, CaliforniaPrimary
Urologists near Dr. Katsumi
Counts of urologists 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. Hiroshi Kan Katsumi treated 14 Medicare patients in 2024, average age 62
CMS counts 14 Medicare patients who saw Dr. Katsumi in 2024. Their average risk score is 2.42, 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. Katsumi's median patient age at 67, with 31% women.
Dr. Katsumi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women31%
- Men69%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Hiroshi Kan Katsumi wrote 1,729 Medicare Part D claims in 2024
In 2024, Dr. Katsumi wrote 1,729 Medicare Part D claims for 462 patients. 89% of them were for generic drugs. CMS names the drug for 1,635 of them, across 18 drugs with 11 or more claims each, at $163,359 in total drug cost. In 2023, CMS named 1,516 claims across 17 drugs.
Dr. Katsumi's Part D claims by kind of drug, 2024
- Generic1,543 claims89%
- Brand-name and other186 claims11%
Dr. Katsumi'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. Katsumi's Part D claims, 2024
- Opioids4%62 of 1,729 claims
- Antibiotics15%259 of 1,729 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: 1,5162024: 1,6358%
Drugs named by CMS: 18 in 2024, 17 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. Hiroshi Kan Katsumi offers telehealth to Medicare patients
Dr. Katsumi accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Katsumi as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Hiroshi Kan Katsumi received $398 in industry payments from 2016 to 2019
CMS Open Payments shows 3 general payments to Dr. Katsumi from 2 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 100% of the total. Olympus America Inc. paid the most, $274.
General payments to Dr. Katsumi by program year, 2016 to 2019
Companies that paid Dr. Katsumi the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Hiroshi Kan Katsumi graduated from Tufts University School of Medicine
Dr. Katsumi graduated from Tufts University School of Medicine in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Hiroshi Kan Katsumi'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 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) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Hiroshi Kan Katsumi
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. Hiroshi Kan Katsumi's NPI number?
Dr. Hiroshi Kan Katsumi's NPI number is 1124297395. It was assigned on February 21, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Hiroshi Kan Katsumi?
Dr. Hiroshi Kan Katsumi is a urologist in Fontana, California. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. Hiroshi Kan Katsumi practice?
Dr. Katsumi practices at 9961 Sierra Ave, Fontana, CA 92335. Dr. Katsumi's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
What is Dr. Hiroshi Kan Katsumi's office phone number?
The practice phone on file for Dr. Katsumi is (909) 427-5000.
What is Dr. Hiroshi Kan Katsumi's medical license number?
Dr. Katsumi holds California license A93331.
Which hospitals is Dr. Hiroshi Kan Katsumi affiliated with?
Dr. Katsumi practices at Fontana Medical Center in Fontana, California. Dr. Katsumi is also affiliated with UCI Health - Orange.
What medical group is Dr. Hiroshi Kan Katsumi part of?
Dr. Katsumi is linked to Southern California Permanente Medical Group.
Does Dr. Hiroshi Kan Katsumi accept Medicare?
Yes. CMS lists Dr. Katsumi as accepting Medicare assignment.
Does Dr. Hiroshi Kan Katsumi offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Katsumi as offering telehealth services.
How many Medicare patients does Dr. Hiroshi Kan Katsumi see?
CMS counts 14 Medicare patients who saw Dr. Katsumi in 2024, with an average age of 62.
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Where did Dr. Hiroshi Kan Katsumi go to medical school?
Dr. Katsumi graduated from Tufts University School of Medicine in 2003.
What drugs does Dr. Hiroshi Kan Katsumi prescribe most?
In 2024 Medicare Part D data, Dr. Katsumi's most prescribed drugs by claims were Tamsulosin HCl, Finasteride and Myrbetriq.
Has Dr. Hiroshi Kan Katsumi received payments from drug or device companies?
CMS Open Payments shows $398 in general payments to Dr. Katsumi from 2 companies from 2016 to 2019. The largest total came from Olympus America Inc.
How long has Dr. Hiroshi Kan Katsumi been practicing?
Dr. Katsumi graduated from medical school in 2003, 23 years ago.
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