GLADWELL LLC
NPI 1154101921
Clinic/Center - Mental Health (Including Community Mental Health Center) in Baltimore, MD
About Gladwell Llc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GLADWELL LLC (NPI 1154101921) is a healthcare organization registered as a mental health (including community mental health center) in Baltimore, Maryland and active in the NPI registry since September 2023. The organization lists Catherine Wanjiru Donnerstag, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Gladwell Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Gladwell LLC, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Gladwell LLC's NPI number?
The NPI number for Gladwell LLC is 1154101921. It was assigned to this organization in the NPPES registry on September 29, 2023.
Where is Gladwell LLC located?
Gladwell LLC is located at 1015 Debbie Ave, Baltimore, MD 21221. The listed phone number is (253) 509-4433.
What is Gladwell LLC's specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Mental Health (Including Community Mental Health Center), with taxonomy code 261QM0801X.
Is Gladwell LLC enrolled in Medicare?
Yes. Gladwell LLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Gladwell LLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Nurse Practitioner) reassigns their Medicare billing to Gladwell LLC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Gladwell LLC was last updated on November 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.
# Gladwell Llc · NPI 1154101921
Mental Health (Including Community Mental Health Center) organization in Baltimore, Maryland. Organization record, active in the CMS NPPES registry since September 29, 2023.
## Identity
- **NPI:** 1154101921 (Entity type: Organization)
- **Enumerated:** September 29, 2023
- **Primary specialty:** Clinic/Center - Mental Health (Including Community Mental Health Center) · taxonomy 261QM0801X
- **Organization subpart:** No
- **Authorized official:** Catherine Donnerstag, PRESIDENT
## Practice location
- **Address:** 1015 DEBBIE AVE, Baltimore, MD 21221-3339
- **Phone:** (253) 509-4433
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Nurse Practitioner) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 21, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1154101921) · Data from the CMS NPPES public registry.