John Aiken, MD
NPI 1003867599 · Pediatric Surgery Physician · Milwaukee, WI
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Aiken, MD is a Pediatric Surgery Physician provider in Milwaukee, WI (NPI 1003867599).
Provider details
- NPI number
- 1003867599
- Entity type
- Individual
- Primary specialty
- Pediatric Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 34722 (WI)
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
100% of core fields populated
- Practice footprint23% of score
3 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 (2)
- 2575 E Evergreen DriveAppleton, WI 54913-8904Phone: (920) 969-5353Fax: (414) 337-7201
- 9200 W Wisconsin AveMilwaukee, WI 53226-3522Phone: (414) 805-5800Fax: (414) 805-8097
Registry dates
- Enumerated
- 2006-05-12
- Last updated
- 2024-03-08
- Certified
- 2024-03-08
Frequently asked questions
- What is John Aiken's NPI number?
- John Aiken's National Provider Identifier (NPI) is 1003867599, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Aiken's specialty?
- John Aiken is listed in the NPPES registry with a primary specialty of Pediatric Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is John Aiken located?
- John Aiken's practice location on file with NPPES is 9000 W Wisconsin Ave, Milwaukee, WI 53226-4874.
- What is John Aiken's phone number?
- The practice phone number listed in the NPPES registry for John Aiken is (414) 266-6550.
- Does John Aiken accept Medicare?
- John Aiken is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Aiken's NPI active?
- Yes — John Aiken's NPI (1003867599) is active in the NPPES registry as of the last update on 2024-03-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.