LYSSA LYNN ATWELL ACNP
NPI 1609716463
Nurse Practitioner - Acute Care in Saint Louis, MO
About Lyssa Lynn Atwell Acnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LYSSA LYNN ATWELL ACNP (NPI 1609716463) is an individual acute care provider in Saint Louis, Missouri, licensed in Missouri (2026008972) and active in the NPI registry since March 2026. She is enrolled in Medicare PECOS and is a graduate of Other (2025).
NPPES Registry Identity
Specialties & Licenses 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Lyssa Lynn Atwell Acnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Lyssa Atwell reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- 405 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 63104 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 63104
SAINT LOUIS, MO 63104
SAINT LOUIS, MO 63104
SAINT LOUIS, MO 63104
SAINT LOUIS, MO 63104
SAINT LOUIS, MO 63104
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 Lyssa Atwell's NPI number?
The NPI number for Lyssa Atwell is 1609716463. It was assigned to this individual provider in the NPPES registry on March 31, 2026.
Where is Lyssa Atwell located?
Lyssa Atwell practices at 1402 S Grand Blvd, Saint Louis, MO 63104. The listed phone number is (314) 977-2222.
What is Lyssa Atwell's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Lyssa Atwell enrolled in Medicare?
Yes. Lyssa Atwell is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Lyssa Atwell's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lyssa Atwell reassigns Medicare benefits to Washington University (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 Lyssa Atwell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Lyssa Atwell was last updated on October 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 days 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.
# Lyssa Lynn Atwell, ACNP · NPI 1609716463
Acute Care physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since March 31, 2026.
## Identity
- **NPI:** 1609716463 (Entity type: Individual)
- **Enumerated:** March 31, 2026
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** 2026008972 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1402 S GRAND BLVD, Saint Louis, MO 63104-1004
- **Phone:** (314) 977-2222
## 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:** Washington University (NPI 1528005642, Saint Louis, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2025
## Record status
- **NPPES last updated:** October 16, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1609716463) · Data from the CMS NPPES public registry.