Leonard Vankalmthout, D.C.
NPI 1740365543 · Chiropractor · Sayville, NY
Enrolled with Medicare as Practitioner - Chiropractic · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leonard Vankalmthout, D.C. is a Chiropractor provider in Sayville, NY (NPI 1740365543).
Provider details
- NPI number
- 1740365543
- Entity type
- Individual
- Primary specialty
- ChiropractorChiropractic Providers
- Credential
- D.C.
- Sex
- Male
- Sole proprietor
- Yes
- License
- X007087 (NY)
Specialties & taxonomies
Chiropractic Providers
Chiropractic Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
550 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Chiropractic Manipulative Treatment, 1-2 Spinal Regions98940 | 550 | $30 |
Typical Medicare-allowed amounts for these services range $30–$30 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-27
- Last updated
- 2016-11-30
Frequently asked questions
- What is Leonard Vankalmthout's NPI number?
- Leonard Vankalmthout's National Provider Identifier (NPI) is 1740365543, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leonard Vankalmthout's specialty?
- Leonard Vankalmthout is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).
- Where is Leonard Vankalmthout located?
- Leonard Vankalmthout's practice location on file with NPPES is 200 Railroad Ave, Sayville, NY 11782-2730.
- What is Leonard Vankalmthout's phone number?
- The practice phone number listed in the NPPES registry for Leonard Vankalmthout is (631) 567-2424.
- Does Leonard Vankalmthout accept Medicare?
- Leonard Vankalmthout is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leonard Vankalmthout's NPI active?
- Yes — Leonard Vankalmthout's NPI (1740365543) is active in the NPPES registry as of the last update on 2016-11-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.