Toby Ishizuka, DPM
- Medicare patients, 2024
- 325
- Part D claims, 2024
- 218
- MIPS score, 2024
- 94
- Hospital affiliations
- 2
- Industry payments
- $199
- Practice address
- 20130 Lake Chabot Rd, Castro Valley, CA 94546
- Practice phone
- Call (510) 889-1700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Associated Urology Medical Group,Inc.
Castro Valley, California
Find Toby Ishizuka'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.
Toby Ishizuka is a podiatric surgeon in Castro Valley, California
Toby Ishizuka practices at Associated Urology Medical Group,Inc. in Castro Valley, California.
Toby Ishizuka's NPI, 1942731021, was assigned on March 21, 2017. Toby Ishizuka graduated from California School of Podiatric Medicine in 2020. Toby Ishizuka holds California license E5638.
- NPI
- 1942731021NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305245382
- NPI enumeration date
- March 21, 2017
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (510) 889-1700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Toby Ishizuka practices at Associated Urology Medical Group,Inc. in Castro Valley, California
Toby Ishizuka's primary practice is Associated Urology Medical Group,Inc., at 20130 Lake Chabot Rd, Castro Valley, CA 94546 in Alameda County. The practice phone is (510) 889-1700.
- Associated Urology Medical Group,Inc.20130 Lake Chabot Rd, Castro Valley, CA 94546 · Alameda CountyPhone(510) 889-1700
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Toby Ishizuka is affiliated with 5 sites of care and 2 medical groups
Toby Ishizuka's primary practice is Associated Urology Medical Group,Inc. in Castro Valley, California. Toby Ishizuka is also affiliated with Cedars-Sinai Medical Center. The medical group on file is Bay Area Foot Care. Dmand AI also links Toby Ishizuka to 1 more hospital, 2 group practices and clinics and 1 medical group, each 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 Toby Ishizuka's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Toby Ishizuka practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Associated Urology Medical Group,Inc. | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Toby Ishizuka is one of 1,112 podiatric surgeons in California
Foot and ankle surgery is Toby Ishizuka's primary specialty in the NPI Registry, under taxonomy code 213ES0103X. Toby Ishizuka is licensed in California.
Specialties and state licenses
- Foot and ankle surgery podiatrist, CaliforniaPrimary
Podiatric surgeons near Toby Ishizuka
Counts of podiatric surgeons 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
Toby Ishizuka treated 325 Medicare patients in 2024, average age 77
CMS counts 325 Medicare patients who saw Toby Ishizuka in 2024. The largest group is 75 to 84, with 140 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 12% are also on Medicaid. Their average risk score is 1.49, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Toby Ishizuka's median patient age at 62, with 52% women.
Toby Ishizuka's Medicare patients by age, 2024
Toby Ishizuka's Medicare patients by sex, 2024
- Women18055%
- Men14545%
Chronic conditions among Toby Ishizuka's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Ischemic heart disease42%
- Diabetes34%
- Anxiety26%
- Chronic kidney disease26%
- Osteoporosis24%
Share of Medicare patients with each condition. A patient can have several.
Toby Ishizuka's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women52%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Toby Ishizuka wrote 218 Medicare Part D claims in 2024
In 2024, Toby Ishizuka wrote 218 Medicare Part D claims for 94 patients. 94% of them were for generic drugs.
Toby Ishizuka's Part D claims by kind of drug, 2024
- Generic204 claims94%
- Brand-name14 claims6%
Drug classes CMS tracks in Toby Ishizuka's Part D claims, 2024
- Opioids7%16 of 218 claims
- Antibiotics19%42 of 218 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Toby Ishizuka scored 94 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 94 out of 100 for Toby Ishizuka for performance year 2024, reported as part of a group. Toby Ishizuka accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 206 procedures of removal or shaving of skin growth by Toby Ishizuka, more than 90% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Toby Ishizuka's MIPS scores, performance year 2024
- 94of 100Final score
- 87.3of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Toby Ishizuka ranks in Medicare procedure volume
- Removal of nail tissue
- 80th percentile359 procedures
- Removal or shaving of skin growth
- 90th percentile206 procedures
- Removal of tissue
- 70th percentile22 procedures
- Removal of skin lesions
- 62nd percentile15 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Toby Ishizuka received $199 in industry payments in 2025
CMS Open Payments shows 4 general payments to Toby Ishizuka from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Orthofix Medical, Inc. paid the most, $199.
Companies that paid Toby Ishizuka the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Toby Ishizuka graduated from California School of Podiatric Medicine
Toby Ishizuka graduated from California School of Podiatric Medicine in 2020.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Toby Ishizuka'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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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 Toby Ishizuka
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Toby Ishizuka's NPI number?
Toby Ishizuka's NPI number is 1942731021. It was assigned on March 21, 2017, and it is active in the NPI Registry.
What does Toby Ishizuka specialize in?
Toby Ishizuka is a podiatric surgeon in Castro Valley, California. The primary specialty in the NPI Registry is Foot & Ankle Surgery Podiatrist (taxonomy code 213ES0103X).
Where does Toby Ishizuka practice?
Toby Ishizuka practices at 20130 Lake Chabot Rd, Castro Valley, CA 94546. Toby Ishizuka's primary practice is Associated Urology Medical Group,Inc. in Castro Valley, California. Dmand AI also links Toby Ishizuka to 1 hospital, 2 group practices and clinics and 1 medical group.
What is Toby Ishizuka's office phone number?
The practice phone on file for Toby Ishizuka is (510) 889-1700.
What is Toby Ishizuka's medical license number?
Toby Ishizuka holds California license E5638.
Which hospitals is Toby Ishizuka affiliated with?
Toby Ishizuka is affiliated with Cedars-Sinai Medical Center. Dmand AI links Toby Ishizuka to 1 more hospital.
What medical group is Toby Ishizuka part of?
Toby Ishizuka is linked to Bay Area Foot Care. Dmand AI links Toby Ishizuka to 1 more medical group.
Does Toby Ishizuka accept Medicare?
Yes. CMS lists Toby Ishizuka as accepting Medicare assignment.
What is Toby Ishizuka's MIPS score?
Toby Ishizuka's MIPS final score for performance year 2024 is 94 out of 100, reported as part of a group.
How many Medicare patients does Toby Ishizuka see?
CMS counts 325 Medicare patients who saw Toby Ishizuka in 2024, with an average age of 77.
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Where did Toby Ishizuka go to medical school?
Toby Ishizuka graduated from California School of Podiatric Medicine in 2020.
Has Toby Ishizuka received payments from drug or device companies?
CMS Open Payments shows $199 in general payments to Toby Ishizuka from 1 company from 2025 to 2025. The largest total came from Orthofix Medical, Inc.
How long has Toby Ishizuka been practicing?
Toby Ishizuka graduated from medical school in 2020, 6 years ago.
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