WILLIAM M LENNARZ MD
NPI 1942223797
Pediatrics in New Orleans, LA
About William M Lennarz Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM M LENNARZ MD (NPI 1942223797) is an individual pediatrics provider in New Orleans, Louisiana, licensed in Louisiana (301573) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 6
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
William M Lennarz Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show William Lennarz reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New Orleans, LA 70121
- Reassigned Medicare billing, Louisiana enrollment
- 4,559 clinicians in this Medicare group
New Orleans, LA 70115
- Reassigned Medicare billing, Louisiana enrollment
- 240 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 70121 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.
NEW ORLEANS, LA 70121
NEW ORLEANS, LA 70121
NEW ORLEANS, LA 70121
NEW ORLEANS, LA 70121
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 William Lennarz's NPI number?
The NPI number for William Lennarz is 1942223797. It was assigned to this individual provider in the NPPES registry on July 25, 2006.
Where is William Lennarz located?
William Lennarz practices at 1315 Jefferson Hwy, New Orleans, LA 70121. The listed phone number is (504) 842-3900.
What is William Lennarz's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is William Lennarz enrolled in Medicare?
Yes. William Lennarz is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for William Lennarz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Lennarz reassigns Medicare benefits to 2 organizations: Ochsner Clinic LLC (New Orleans, LA) and Belle Chasse Emergency Group LLC (New Orleans, LA). Each 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 William Lennarz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Lennarz accept?
Health plans from CHRISTUS Health Plan and HMO Louisiana list William Lennarz 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.
When was this NPI record last updated?
The NPPES record for William Lennarz was last updated on April 4, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# William M Lennarz, MD · NPI 1942223797
Pediatrics physician in New Orleans, Louisiana. Individual provider, active in the CMS NPPES registry since July 25, 2006.
## Identity
- **NPI:** 1942223797 (Entity type: Individual)
- **Enumerated:** July 25, 2006
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 301573 (Louisiana)
- **Sole proprietor:** No
## Practice location
- **Address:** 1315 JEFFERSON HWY, New Orleans, LA 70121-2406
- **Phone:** (504) 842-3900 · **Fax:** (504) 842-5647
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Ochsner Clinic LLC (NPI 1699958371, New Orleans, LA); Belle Chasse Emergency Group LLC (NPI 1851714075, New Orleans, LA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 4, 2017
- **Other identifiers:** Medicaid 00027274 (MS); Medicare ID-Type Unspecified 130462 (OR); Medicare PIN 507013YH3U (LA); and 3 more
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Source: [NPI Profile](https://npiprofile.com/npi/1942223797) · Data from the CMS NPPES public registry.