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DR. WILLIAM J SIEBEN
NPI 1659150845
Marriage & Family Therapist in Isanti, MN

Active since September 26, 2023PECOS EnrolledAccepts Medicare Assignment
201 WEST MAIN ST., ISANTI, MN 55040(763) 600-2911(763) 244-1243 Get Directions Write a Review

NPPES record last updated: November 22, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. William J Sieben NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM J SIEBEN (NPI 1659150845) is an individual marriage & family therapist in Isanti, Minnesota, licensed in Minnesota (4510) and active in the NPI registry since September 2023. He is enrolled in Medicare PECOS, maintains a secondary practice location in Wyoming, and is a graduate of Other (2018).

NPPES Registry Identity

NPI1659150845
Entity TypeIndividualMale
Primary Taxonomy106H00000X
Provider Legal NameDR. WILLIAM J SIEBEN
Location Address201 WEST MAIN ST.Isanti, MN 55040
Mailing AddressPo Box 23Isanti, MN 55040-0023 · (763) 600-2911 · Fax (763) 244-1243
Phone(763) 600-2911
Fax(763) 244-1243
Sole ProprietorYes
Medical School CMSOtherGraduated 2018
Enumeration DateSeptember 26, 2023
Last NPPES UpdateNovember 22, 2023
NPPES CertifiedNovember 22, 2023
✔ NPI 1659150845 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyMarriage & Family TherapistBehavioral Health & Social Service Providers
Taxonomy Code106H00000X
License✔ Licensed in MN · 4510
Definition
A marriage and family therapist is a person with a master's degree in marriage and family therapy, or a master's or doctoral degree in a related mental health field with substantially equivalent coursework in marriage and family therapy, who receives supervised clinical experience, or a person who meets the state requirements to practice as a marriage and family therapist. A marriage and family therapist treats mental and emotional disorders within the context of marriage and family systems. A marriage and family therapist provides mental health and counseling services to individuals, couples, families, and groups.
201 WEST MAIN ST., Isanti, MN 55040
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Secondary Practice Location 1

Location 19623 192nd Ave NEWyoming, MN 55092-6800 · Phone (763) 333-9838 · Fax (763) 333-9640

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include HealthPartners.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

Dr. William J Sieben 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.

PECOS PAC ID1850741901
PECOS Enrollment IDI20240102001976
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show William Sieben reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Serenity Circle Counseling, LLC
Same address
Mental Health (Including Community Mental Health Center)
201 MAIN STREET W
Isanti, MN 55040
  • Reassigned Medicare billing, Minnesota enrollment
  • 16 clinicians in this Medicare group
NPI 1366766206 (763) 600-2911

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 William Sieben's NPI number?

The NPI number for William Sieben is 1659150845. It was assigned to this individual provider in the NPPES registry on September 26, 2023.

Where is William Sieben located?

William Sieben practices at 201 West Main St., Isanti, MN 55040. The listed phone number is (763) 600-2911.

What is William Sieben's specialty?

The primary specialty registered for this NPI is Marriage & Family Therapist with taxonomy code 106H00000X.

Is William Sieben enrolled in Medicare?

Yes. William Sieben 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 organization bills Medicare for William Sieben's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Sieben reassigns Medicare benefits to Serenity Circle Counseling, LLC (Isanti, MN). 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 William Sieben's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Sieben accept?

Health plans from HealthPartners list William Sieben 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 William Sieben was last updated on November 22, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.