MS. MARIA LYNN SIEBEL R-L.C.S.W.
NPI 1659424844
Counselor - Mental Health in Brooklyn, NY
About Ms. Maria Lynn Siebel R-l.c.s.w. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. MARIA LYNN SIEBEL R-L.C.S.W. (NPI 1659424844) is an individual mental health provider in Brooklyn, New York, licensed in New York (R034144-1) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ms. Maria Lynn Siebel R-l.c.s.w. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Maria Siebel reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Brooklyn, NY 11204
- Reassigned Medicare billing, New York enrollment
- 21 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 5
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 Maria Siebel's NPI number?
The NPI number for Maria Siebel is 1659424844. It was assigned to this individual provider in the NPPES registry on January 19, 2007.
Where is Maria Siebel located?
Maria Siebel practices at 565 1st St Apt. 2, Brooklyn, NY 11215. The listed phone number is (718) 369-2659.
What is Maria Siebel's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.
Is Maria Siebel enrolled in Medicare?
Yes. Maria Siebel is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Maria Siebel's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Maria Siebel reassigns Medicare benefits to Health Care Choices Ny Inc (Brooklyn, 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 Maria Siebel'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 Maria Siebel was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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. Maria Lynn Siebel, R-L.C.S.W. · NPI 1659424844
Mental Health provider in Brooklyn, New York. Individual provider, active in the CMS NPPES registry since January 19, 2007.
## Identity
- **NPI:** 1659424844 (Entity type: Individual)
- **Enumerated:** January 19, 2007
- **Primary specialty:** Counselor - Mental Health · taxonomy 101YM0800X
- **State license:** R034144-1 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 565 1ST ST, APT. 2, Brooklyn, NY 11215-2310
- **Phone:** (718) 369-2659
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Health Care Choices Ny Inc (NPI 1770521270, Brooklyn, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare ID-Type Unspecified N797410 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1659424844) · Data from the CMS NPPES public registry.