Matthew Kleinjan, MD, PHD
NPI 1447949730 · Anatomic Pathology & Clinical Pathology Physician · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Kleinjan, MD, PHD is a Anatomic Pathology & Clinical Pathology Physician provider in Chicago, IL (NPI 1447949730).
Provider details
- NPI number
- 1447949730
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 125.081559 (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
3 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
Mailing address
Registry dates
- Enumerated
- 2023-05-03
- Last updated
- 2023-05-03
- Certified
- 2023-05-03
Frequently asked questions
- What is Matthew Kleinjan's NPI number?
- Matthew Kleinjan's National Provider Identifier (NPI) is 1447949730, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Kleinjan's specialty?
- Matthew Kleinjan is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Kleinjan located?
- Matthew Kleinjan's practice location on file with NPPES is 5841 S Maryland Ave, Chicago, IL 60637-1443.
- What is Matthew Kleinjan's phone number?
- The practice phone number listed in the NPPES registry for Matthew Kleinjan is (773) 834-7644.
- Does Matthew Kleinjan accept Medicare?
- Matthew Kleinjan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Kleinjan's NPI active?
- Yes — Matthew Kleinjan's NPI (1447949730) is active in the NPPES registry as of the last update on 2023-05-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.