Nicholas Mcclellan, DO
NPI 1427410737 · Pediatric Rheumatology Physician · Marshfield, WI
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Mcclellan, DO is a Pediatric Rheumatology Physician provider in Marshfield, WI (NPI 1427410737).
Provider details
- NPI number
- 1427410737
- Entity type
- Individual
- Primary specialty
- Pediatric Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 5101026041 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 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
- 2016-03-25
- Last updated
- 2026-03-24
- Certified
- 2026-03-24
Frequently asked questions
- What is Nicholas Mcclellan's NPI number?
- Nicholas Mcclellan's National Provider Identifier (NPI) is 1427410737, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Mcclellan's specialty?
- Nicholas Mcclellan is listed in the NPPES registry with a primary specialty of Pediatric Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas Mcclellan located?
- Nicholas Mcclellan's practice location on file with NPPES is 1000 N Oak Ave, Marshfield, WI 54449-5703.
- What is Nicholas Mcclellan's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Mcclellan is (715) 387-5511.
- Does Nicholas Mcclellan accept Medicare?
- Nicholas Mcclellan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Mcclellan's NPI active?
- Yes — Nicholas Mcclellan's NPI (1427410737) is active in the NPPES registry as of the last update on 2026-03-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.