John Frederiksen, M.D., PH.D.
NPI 1396987277 · Anatomic Pathology & Clinical Pathology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Frederiksen, M.D., PH.D. is a Anatomic Pathology & Clinical Pathology Physician provider in Chicago, IL (NPI 1396987277).
Provider details
- NPI number
- 1396987277
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036.158028 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
593 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Hemoglobin Analysis and Measurement, Electrophoresis83020 | 236 | $18 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 94 | $27 |
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 64 | $36 |
| Flow Cytometry Technique for Dna Or Cell Analysis, 9 to 15 Markers88188 | 42 | $62 |
| Blood Smear Interpretation By Physician With Written Report85060 | 26 | $24 |
| Bone Marrow, Smear Interpretation85097 | 26 | $49 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-03-24
- Last updated
- 2024-06-11
- Certified
- 2024-06-11
Frequently asked questions
- What is John Frederiksen's NPI number?
- John Frederiksen's National Provider Identifier (NPI) is 1396987277, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Frederiksen's specialty?
- John Frederiksen is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is John Frederiksen located?
- John Frederiksen's practice location on file with NPPES is 840 S. Wood St., Chicago, IL 60612-4325.
- What is John Frederiksen's phone number?
- The practice phone number listed in the NPPES registry for John Frederiksen is (312) 996-7312.
- Does John Frederiksen accept Medicare?
- John Frederiksen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Frederiksen's NPI active?
- Yes — John Frederiksen's NPI (1396987277) is active in the NPPES registry as of the last update on 2024-06-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.