DR. ALEXANDRE LACASSE M.D., M.SC.
NPI 1972723765
Internal Medicine in Saint Louis, MO
About Dr. Alexandre Lacasse M.d., M.sc. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALEXANDRE LACASSE M.D., M.SC. (NPI 1972723765) is an individual internal medicine provider in Saint Louis, Missouri, licensed in Tennessee (MD0000042236) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS, is affiliated with Ssm Health St Mary's Hospital - St Louis, and is a graduate of Other (2003).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Alexandre Lacasse M.d., M.sc. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Alexandre Lacasse reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saint Louis, MO 63117
- Reassigned Medicare billing, Missouri enrollment
- 741 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ssm Health St Mary's Hospital - St Louis
Acute Care Hospitals · Richmond Heights, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63117 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAINT LOUIS, MO 63117
SAINT LOUIS, MO 63117
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Alexandre Lacasse's NPI number?
The NPI number for Alexandre Lacasse is 1972723765. It was assigned to this individual provider in the NPPES registry on April 26, 2007.
Where is Alexandre Lacasse located?
Alexandre Lacasse practices at 6420 Clayton Rd Medicine Outpatient Clinic, Saint Louis, MO 63117. The listed phone number is (314) 768-8373.
What is Alexandre Lacasse's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Alexandre Lacasse enrolled in Medicare?
Yes. Alexandre Lacasse is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Alexandre Lacasse's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexandre Lacasse reassigns Medicare benefits to Ssm Health Care St. Louis (Saint Louis, MO). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alexandre Lacasse's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Alexandre Lacasse accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 4 other insurers list Alexandre Lacasse as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Alexandre Lacasse affiliated with any hospitals?
According to CMS data, Alexandre Lacasse is affiliated with Ssm Health St Mary's Hospital - St Louis.
When was this NPI record last updated?
The NPPES record for Alexandre Lacasse was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Alexandre Lacasse, M.D., M.SC. · NPI 1972723765
Internal Medicine physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since April 26, 2007.
## Identity
- **NPI:** 1972723765 (Entity type: Individual)
- **Enumerated:** April 26, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** MD0000042236 (Tennessee)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 6420 CLAYTON RD, MEDICINE OUTPATIENT CLINIC, Saint Louis, MO 63117-1811
- **Phone:** (314) 768-8373
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Ssm Health Care St. Louis (NPI 1366400855, Saint Louis, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2003
## Record status
- **NPPES last updated:** March 7, 2023
- **Other identifiers:** Other MD0000042236 (TN); Other 2006028227 (MO); Other 302710825 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1972723765) · Data from the CMS NPPES public registry.