John Ryan, MD
NPI 1922845080 · Anatomic Pathology & Clinical Pathology Physician · Chicago, IL
John Ryan, MD is a Anatomic Pathology & Clinical Pathology Physician provider in Chicago, IL (NPI 1922845080).
Provider details
- NPI number
- 1922845080
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 125.087321 (IL)
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
1 yr 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
Mailing address
Registry dates
- Enumerated
- 2024-07-15
- Last updated
- 2026-05-21
- Certified
- 2026-05-21
Frequently asked questions
- What is John Ryan's NPI number?
- John Ryan's National Provider Identifier (NPI) is 1922845080, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Ryan's specialty?
- John Ryan is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is John Ryan located?
- John Ryan's practice location on file with NPPES is 5841 S Maryland Ave, Chicago, IL 60637-1443.
- What is John Ryan's phone number?
- The practice phone number listed in the NPPES registry for John Ryan is (773) 834-7708.
- Is John Ryan's NPI active?
- Yes — John Ryan's NPI (1922845080) is active in the NPPES registry as of the last update on 2026-05-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.