Mack David Toyama, DC, PA-C
- Part D claims, 2024
- 191
- Industry payments
- $41
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 1901 Holser Walk, Oxnard, CA 93036
- Practice phone
- Call (805) 988-2273
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ventura County Occupational Medical Center
Urgent Care Center · Oxnard, California
Find Mack Toyama'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.
Mack David Toyama is a chiropractor in Oxnard, California
Mack Toyama practices at Ventura County Occupational Medical Center in Oxnard, California.
Mack Toyama's NPI, 1740235639, was assigned on May 23, 2006. Mack Toyama graduated from University of California, Davis School of Medicine in 2003. Mack Toyama holds California license DC22187.
- NPI
- 1740235639NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9335296391
- NPI enumeration date
- May 23, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 988-2273
- 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)
Mack David Toyama practices at Ventura County Occupational Medical Center in Oxnard, California
Mack Toyama's primary practice is Ventura County Occupational Medical Center, at 1901 Holser Walk, Oxnard, CA 93036. The practice phone is (805) 988-2273.
- Ventura County Occupational Medical Center1901 Holser Walk, Oxnard, CA 93036Phone(805) 988-2273
Source: Dmand AI Affiliation Data
Mack David Toyama is affiliated with 1 site of care and 1 medical group
Mack Toyama's primary practice is Ventura County Occupational Medical Center in Oxnard, California. Dmand AI also links Mack Toyama to 1 medical group, named with a free account. Mack Toyama's employer is on file too: an urgent care center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Mack David Toyama's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mack Toyama practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ventura County Occupational Medical Center | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Mack David Toyama is one of 4,365 chiropractors in California
Chiropractor is Mack Toyama's primary specialty in the NPI Registry, under taxonomy code 111N00000X. Mack Toyama is licensed in California.
Specialties and state licenses
- Chiropractor, CaliforniaPrimary
Chiropractors near Mack Toyama
Counts of chiropractors 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
Mack David Toyama's patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Mack Toyama's median patient age at 68, with 37% women.
Mack Toyama's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women37%
- Men63%
Source: Dmand AI Patient Panel Data
Mack David Toyama wrote 191 Medicare Part D claims in 2024
In 2024, Mack Toyama wrote 191 Medicare Part D claims for 35 patients. 79% of them were for generic drugs.
Mack Toyama's Part D claims by kind of drug, 2024
- Generic150 claims79%
- Brand-name and other41 claims21%
Drug classes CMS tracks in Mack Toyama's Part D claims, 2024
- Opioids6%11 of 191 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
How Mack David Toyama takes part in Medicare
Mack Toyama accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Mack David Toyama received $41 in industry payments in 2025
CMS Open Payments shows 2 general payments to Mack Toyama from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Seqirus USA Inc paid the most, $25.
Companies that paid Mack Toyama the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Mack David Toyama graduated from University of California, Davis School of Medicine
Mack Toyama graduated from University of California, Davis School of Medicine in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Mack David Toyama'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 (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 Mack David Toyama
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mack David Toyama's NPI number?
Mack David Toyama's NPI number is 1740235639. It was assigned on May 23, 2006, and it is active in the NPI Registry.
What does Mack David Toyama specialize in?
Mack David Toyama is a chiropractor in Oxnard, California. The primary specialty in the NPI Registry is Chiropractor (taxonomy code 111N00000X).
Where does Mack David Toyama practice?
Mack Toyama practices at 1901 Holser Walk, Oxnard, CA 93036. Mack Toyama's primary practice is Ventura County Occupational Medical Center in Oxnard, California. Dmand AI also links Mack Toyama to 1 medical group.
What is Mack David Toyama's office phone number?
The practice phone on file for Mack Toyama is (805) 988-2273.
What is Mack David Toyama's medical license number?
Mack Toyama holds California license DC22187.
Does Mack David Toyama accept Medicare?
Yes. CMS lists Mack Toyama as accepting Medicare assignment.
Where did Mack David Toyama go to medical school?
Mack Toyama graduated from University of California, Davis School of Medicine in 2003.
Has Mack David Toyama received payments from drug or device companies?
CMS Open Payments shows $41 in general payments to Mack Toyama from 2 companies from 2025 to 2025. The largest total came from Seqirus USA Inc.
How long has Mack David Toyama been practicing?
Mack Toyama graduated from medical school in 2003, 23 years ago.
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