William Sieben
NPI 1659150845 · Marriage & Family Therapist · Isanti, MN
Enrolled with Medicare as Practitioner - Marriage and Family Therapist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Sieben is a Marriage & Family Therapist provider in Isanti, MN (NPI 1659150845).
Provider details
- NPI number
- 1659150845
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4510 (MN)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
2 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 9623 192nd Ave NeWyoming, MN 55092-6800Phone: (763) 333-9838Fax: (763) 333-9640
Registry dates
- Enumerated
- 2023-09-26
- Last updated
- 2023-11-22
- Certified
- 2023-11-22
Frequently asked questions
- What is William Sieben's NPI number?
- William Sieben's National Provider Identifier (NPI) is 1659150845, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Sieben's specialty?
- William Sieben is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is William Sieben located?
- William Sieben's practice location on file with NPPES is 201 West Main St., Isanti, MN 55040.
- What is William Sieben's phone number?
- The practice phone number listed in the NPPES registry for William Sieben is (763) 600-2911.
- Does William Sieben accept Medicare?
- William Sieben is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Sieben's NPI active?
- Yes — William Sieben's NPI (1659150845) is active in the NPPES registry as of the last update on 2023-11-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.