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John Larson, D.O.
NPI 1093722860 · Diagnostic Radiology Physician · Chicago, IL
John Larson, D.O. is a Diagnostic Radiology Physician provider in Chicago, IL (NPI 1093722860).
Provider details
- NPI number
- 1093722860
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(84/100 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
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
1901 W Harrison St
Chicago, IL 60612-3714
Phone: (312) 864-3825
Street-level locationGet directions
Mailing address
633 S Laflin St
Chicago, IL 60607-3177
Registry dates
- Enumerated
- 2006-08-02
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Larson's NPI number?
- John Larson's National Provider Identifier (NPI) is 1093722860, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Larson's specialty?
- John Larson is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Larson located?
- John Larson's practice location on file with NPPES is 1901 W Harrison St, Chicago, IL 60612-3714.
- What is John Larson's phone number?
- The practice phone number listed in the NPPES registry for John Larson is (312) 864-3825.
- Is John Larson's NPI active?
- Yes — John Larson's NPI (1093722860) 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.