MS. COURTNEY JOYCE FLAGG
NPI 1578991402
Counselor - Mental Health in Worcester, MA
About Ms. Courtney Joyce Flagg NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. COURTNEY JOYCE FLAGG (NPI 1578991402) is an individual mental health provider in Worcester, Massachusetts and active in the NPI registry since November 2013. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ms. Courtney Joyce Flagg is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Courtney Flagg reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Brockton, MA 02301
- Reassigned Medicare billing, Massachusetts enrollment
- 120 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.
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.
WORCESTER, MA 01608
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 Courtney Flagg's NPI number?
The NPI number for Courtney Flagg is 1578991402. It was assigned to this individual provider in the NPPES registry on November 1, 2013.
Where is Courtney Flagg located?
Courtney Flagg practices at 340 Main St Suite 818, Worcester, MA 01608. The listed phone number is (508) 791-6723.
What is Courtney Flagg's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.
Is Courtney Flagg enrolled in Medicare?
Yes. Courtney Flagg is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Courtney Flagg's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Courtney Flagg reassigns Medicare benefits to Sb Transitional Sub, LLC (Brockton, MA). 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 Courtney Flagg'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 Courtney Flagg was last updated on November 1, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.
# Ms. Courtney Joyce Flagg · NPI 1578991402
Mental Health provider in Worcester, Massachusetts. Individual provider, active in the CMS NPPES registry since November 1, 2013.
## Identity
- **NPI:** 1578991402 (Entity type: Individual)
- **Enumerated:** November 1, 2013
- **Primary specialty:** Counselor - Mental Health · taxonomy 101YM0800X
- **Sole proprietor:** Yes
## Practice location
- **Address:** 340 MAIN ST, SUITE 818, Worcester, MA 01608-1604
- **Phone:** (508) 791-6723
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Sb Transitional Sub, LLC (NPI 1962091173, Brockton, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 1, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1578991402) · Data from the CMS NPPES public registry.