John Siebers
NPI 1376948638 · Family Nurse Practitioner · Appleton, WI
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Siebers is a Family Nurse Practitioner provider in Appleton, WI (NPI 1376948638).
Provider details
- NPI number
- 1376948638
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Male
- Sole proprietor
- No
- License
- 109608 (WI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2014-10-29
- Last updated
- 2020-12-10
- Certified
- 2020-12-10
Frequently asked questions
- What is John Siebers's NPI number?
- John Siebers's National Provider Identifier (NPI) is 1376948638, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Siebers's specialty?
- John Siebers is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is John Siebers located?
- John Siebers's practice location on file with NPPES is 3329 N Richmond St, Appleton, WI 54911-1063.
- What is John Siebers's phone number?
- The practice phone number listed in the NPPES registry for John Siebers is (920) 380-2715.
- Does John Siebers accept Medicare?
- John Siebers is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Siebers's NPI active?
- Yes — John Siebers's NPI (1376948638) is active in the NPPES registry as of the last update on 2020-12-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.