LOUIS WALTHALL LCSWR, CASAC
NPI 1558502880
Social Worker - Clinical in Ronkonkoma, NY
About Louis Walthall Lcswr, Casac NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LOUIS WALTHALL LCSWR, CASAC (NPI 1558502880) is an individual clinical provider in Ronkonkoma, New York, licensed in New York (051661) and active in the NPI registry since March 2009. He is enrolled in Medicare PECOS and is a graduate of Other (1994).
NPPES Registry Identity
Specialties & Licenses 3
Other Names 1
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
Louis Walthall Lcswr, Casac 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 Louis Walthall reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Lynbrook, NY 11563
- Reassigned Medicare billing, New York enrollment
- 47 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 11779 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Louis Walthall's NPI number?
The NPI number for Louis Walthall is 1558502880. It was assigned to this individual provider in the NPPES registry on March 17, 2009. The provider is also known as Louis C Walthall Lcswr, Casac.
Where is Louis Walthall located?
Louis Walthall practices at 3281 Veterans Memorial Hwy Ste E14, Ronkonkoma, NY 11779. The listed phone number is (631) 471-3122.
What is Louis Walthall's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Louis Walthall enrolled in Medicare?
Yes. Louis Walthall 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 Louis Walthall's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Louis Walthall reassigns Medicare benefits to Nassau Psychology, P.C. (Lynbrook, NY). 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 Louis Walthall's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Louis Walthall accept?
Health plans from Oscar Health list Louis Walthall 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 Louis Walthall was last updated on February 22, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Louis Walthall, LCSWR, CASAC · NPI 1558502880
Clinical provider in Ronkonkoma, New York. Individual provider, active in the CMS NPPES registry since March 17, 2009.
## Identity
- **NPI:** 1558502880 (Entity type: Individual)
- **Enumerated:** March 17, 2009
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** 051661 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 3281 VETERANS MEMORIAL HWY STE E14, Ronkonkoma, NY 11779-7675
- **Phone:** (631) 471-3122
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Nassau Psychology, P.C. (NPI 1750763538, Lynbrook, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1994
## Record status
- **NPPES last updated:** February 22, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1558502880) · Data from the CMS NPPES public registry.