MS. PHYLLIS MARIE SIEBERN LPC
NPI 1326471871
Counselor - Professional in Tucson, AZ
About Ms. Phyllis Marie Siebern Lpc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. PHYLLIS MARIE SIEBERN LPC (NPI 1326471871) is an individual professional provider in Tucson, Arizona, licensed in Arizona (LPC14268) and active in the NPI registry since August 2013. She is enrolled in Medicare PECOS and is a graduate of Other (2001).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Ms. Phyllis Marie Siebern Lpc is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Phyllis Siebern reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Denver, CO 80202
- Reassigned Medicare billing, Arizona enrollment
- 191 clinicians in this Medicare group
San Francisco, CA 94131
- Reassigned Medicare billing, Arizona enrollment
- Medicare enrollment name: Brightside Medical PA
- 31 clinicians in this Medicare group
Houston, TX 77070
- Reassigned Medicare billing, Arizona enrollment
- 59 clinicians in this Medicare group
Houston, TX 77070
- Reassigned Medicare billing, Arizona enrollment
- 59 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 18
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
TUCSON, AZ 85705
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 Phyllis Siebern's NPI number?
The NPI number for Phyllis Siebern is 1326471871. It was assigned to this individual provider in the NPPES registry on August 19, 2013.
Where is Phyllis Siebern located?
Phyllis Siebern practices at 2435 N Castro Ave, Tucson, AZ 85705. The listed phone number is (520) 622-8030.
What is Phyllis Siebern's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Professional, with taxonomy code 101YP2500X.
Is Phyllis Siebern enrolled in Medicare?
Yes. Phyllis Siebern is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Phyllis Siebern's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Phyllis Siebern reassigns Medicare benefits to 4 organizations: Sondermind Provider Network LLC (Denver, CO), Brightside Medical, P.A. (San Francisco, CA), Psychiatry Of Texas PLLC (Houston, TX) and Psychplus Medical Associates, PLLC (Houston, TX). Each 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 Phyllis Siebern's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Phyllis Siebern accept?
Health plans from Anthem Blue Cross and Blue Shield, Antidote Health Plan of Arizona, Inc., Blue Cross Blue Shield of Arizona, Cigna HealthCare of Arizona, Inc and Imperial Insurance Companies, Inc. and 2 other insurers list Phyllis Siebern 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 Phyllis Siebern was last updated on August 19, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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. Phyllis Marie Siebern, LPC · NPI 1326471871
Professional provider in Tucson, Arizona. Individual provider, active in the CMS NPPES registry since August 19, 2013.
## Identity
- **NPI:** 1326471871 (Entity type: Individual)
- **Enumerated:** August 19, 2013
- **Primary specialty:** Counselor - Professional · taxonomy 101YP2500X
- **State license:** LPC14268 (Arizona)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 2435 N CASTRO AVE, Tucson, AZ 85705-5060
- **Phone:** (520) 622-8030 · **Fax:** (520) 622-8012
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Sondermind Provider Network LLC (NPI 1760854442, Denver, CO); Brightside Medical, P.A. (NPI 1609335660, San Francisco, CA); Psychiatry Of Texas PLLC (NPI 1013476027, Houston, TX); Psychplus Medical Associates, PLLC (NPI 1558118026, Houston, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2001
## Record status
- **NPPES last updated:** August 19, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1326471871) · Data from the CMS NPPES public registry.