MRS. RACHEL LANG CASO LICSW
NPI 1922651199
Social Worker - Clinical in Boston, MA
About Mrs. Rachel Lang Caso Licsw NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. RACHEL LANG CASO LICSW (NPI 1922651199) is an individual clinical provider in Boston, Massachusetts, licensed in Massachusetts (122013) and active in the NPI registry since July 2019. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
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 (PECOS)
Mrs. Rachel Lang Caso Licsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Rachel Caso reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boston, MA 02215
- Reassigned Medicare billing, Massachusetts enrollment
- 1,317 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 02215 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.
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 Rachel Caso's NPI number?
The NPI number for Rachel Caso is 1922651199. It was assigned to this individual provider in the NPPES registry on July 17, 2019. The provider is also known as Ms. Rachel Russ Lang.
Where is Rachel Caso located?
Rachel Caso practices at 133 Brookline Ave, Boston, MA 02215. The listed phone number is (617) 421-2952.
What is Rachel Caso's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Rachel Caso enrolled in Medicare?
Yes. Rachel Caso is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Rachel Caso's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Rachel Caso reassigns Medicare benefits to Atrius Health, Inc. (Boston, 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 Rachel Caso's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Rachel Caso accept?
Health plans from Anthem Blue Cross and Blue Shield and Harvard Pilgrim Health Care list Rachel Caso 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 Rachel Caso was last updated on July 17, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Mrs. Rachel Lang Caso, LICSW · NPI 1922651199
Clinical provider in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since July 17, 2019.
## Identity
- **NPI:** 1922651199 (Entity type: Individual)
- **Enumerated:** July 17, 2019
- **Primary specialty:** Social Worker - Clinical · taxonomy 1041C0700X
- **State license:** 122013 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 133 BROOKLINE AVE, Boston, MA 02215-3904
- **Phone:** (617) 421-2952
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Atrius Health, Inc. (NPI 1871639914, Boston, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 17, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1922651199) · Data from the CMS NPPES public registry.