IndividualActive
John Justin, MD
NPI 1104811041 · Pediatrics Physician · Mason City, IA
John Justin, MD is a Pediatrics Physician provider in Mason City, IA (NPI 1104811041).
Provider details
- NPI number
- 1104811041
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 18486 (IA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
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
910 N Eisenhower Ave
Mason City, IA 50401-1525
Phone: (641) 422-7388
Fax: (641) 422-5755
Street-level locationGet directions
Mailing address
200 Hawkins Dr
Iowa City, IA 52242-1009
Registry dates
- Enumerated
- 2005-09-16
- Last updated
- 2007-12-11
Frequently asked questions
- What is John Justin's NPI number?
- John Justin's National Provider Identifier (NPI) is 1104811041, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Justin's specialty?
- John Justin is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is John Justin located?
- John Justin's practice location on file with NPPES is 910 N Eisenhower Ave, Mason City, IA 50401-1525.
- What is John Justin's phone number?
- The practice phone number listed in the NPPES registry for John Justin is (641) 422-7388.
- Is John Justin's NPI active?
- Yes — John Justin's NPI (1104811041) is active in the NPPES registry as of the last update on 2007-12-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.