Mack Toyama, DC, PA-C
NPI 1740235639 · Chiropractor · Oxnard, CA
Enrolled with Medicare as Practitioner - Chiropractic · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mack Toyama, DC, PA-C is a Chiropractor provider in Oxnard, CA (NPI 1740235639).
Provider details
- NPI number
- 1740235639
- Entity type
- Individual
- Primary specialty
- ChiropractorChiropractic Providers
- Credential
- DC, PA-C
- Sex
- Male
- Sole proprietor
- Yes
- License
- DC22187 (CA)
Specialties & taxonomies
Chiropractic Providers
Technologists, Technicians & Other Technical Service Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Lisinopril | 13 |
| Metformin Hcl | 13 |
| Atorvastatin Calcium | 12 |
| Insulin Glargine,hum.rec.anlogbrand: Lantus Solostar | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$133 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-23
- Last updated
- 2011-02-21
Frequently asked questions
- What is Mack Toyama's NPI number?
- Mack Toyama's National Provider Identifier (NPI) is 1740235639, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mack Toyama's specialty?
- Mack Toyama is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).
- Where is Mack Toyama located?
- Mack Toyama's practice location on file with NPPES is 1901 Holser Walk, Oxnard, CA 93036-2633.
- What is Mack Toyama's phone number?
- The practice phone number listed in the NPPES registry for Mack Toyama is (805) 988-2273.
- Does Mack Toyama accept Medicare?
- Mack Toyama is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mack Toyama's NPI active?
- Yes — Mack Toyama's NPI (1740235639) is active in the NPPES registry as of the last update on 2011-02-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.