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John Hagan, MD
NPI 1598819856 · Internal Medicine Physician · Bismarck, ND
John Hagan, MD is a Internal Medicine Physician provider in Bismarck, ND (NPI 1598819856).
Provider details
- NPI number
- 1598819856
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 8370 (ND)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
900 E Broadway Avenue
Bismarck, ND 58501
Phone: (701) 530-7000
Fax: (701) 530-8842
Street-level locationGet directions
Mailing address
900 E Broadway Avenue
Bismarck, ND 58502-0997
Registry dates
- Enumerated
- 2007-01-23
- Last updated
- 2008-01-28
Frequently asked questions
- What is John Hagan's NPI number?
- John Hagan's National Provider Identifier (NPI) is 1598819856, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Hagan's specialty?
- John Hagan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Hagan located?
- John Hagan's practice location on file with NPPES is 900 E Broadway Avenue, Bismarck, ND 58501.
- What is John Hagan's phone number?
- The practice phone number listed in the NPPES registry for John Hagan is (701) 530-7000.
- Is John Hagan's NPI active?
- Yes — John Hagan's NPI (1598819856) is active in the NPPES registry as of the last update on 2008-01-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.