John Showalter, MD
NPI 1285623488 · Orthopaedic Hand Surgery Physician · Warrenville, IL
John Showalter, MD is a Orthopaedic Hand Surgery Physician provider in Warrenville, IL (NPI 1285623488).
Provider details
- NPI number
- 1285623488
- Entity type
- Individual
- Primary specialty
- Orthopaedic Hand Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2005-10-19
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Showalter's NPI number?
- John Showalter's National Provider Identifier (NPI) is 1285623488, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Showalter's specialty?
- John Showalter is listed in the NPPES registry with a primary specialty of Orthopaedic Hand Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is John Showalter located?
- John Showalter's practice location on file with NPPES is 27650 Ferry Rd, Warrenville, IL 60555-3845.
- What is John Showalter's phone number?
- The practice phone number listed in the NPPES registry for John Showalter is (630) 225-2663.
- Is John Showalter's NPI active?
- Yes — John Showalter's NPI (1285623488) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.