Jon Lomasney, MD
NPI 1346269966 · Anatomic Pathology Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jon Lomasney, MD is a Anatomic Pathology Physician provider in Chicago, IL (NPI 1346269966).
Provider details
- NPI number
- 1346269966
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
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
19 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
496 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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 246 | $37 |
| Special Stained Specimen Slides to Examine Tissue Including Interpretation and Report88313 | 93 | $12 |
| Pathology Examination of Tissue Using a Microscope, Moderately High Complexity88307 | 76 | $80 |
| Antibody Evaluation, Initial Single Antibody Stain Procedure88346 | 35 | $35 |
| Pathology Examination of Tissue Using a Microscope, Limited Examination88300 | 31 | $5 |
| Pathology Examination of Tissue Using a Microscope, Moderately Low Complexity88304 | 15 | $12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-18
- Last updated
- 2007-12-13
Frequently asked questions
- What is Jon Lomasney's NPI number?
- Jon Lomasney's National Provider Identifier (NPI) is 1346269966, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jon Lomasney's specialty?
- Jon Lomasney is listed in the NPPES registry with a primary specialty of Anatomic Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Jon Lomasney located?
- Jon Lomasney's practice location on file with NPPES is 680 N Lake Shore Dr, Chicago, IL 60611-4546.
- What is Jon Lomasney's phone number?
- The practice phone number listed in the NPPES registry for Jon Lomasney is (312) 695-9797.
- Does Jon Lomasney accept Medicare?
- Jon Lomasney is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jon Lomasney's NPI active?
- Yes — Jon Lomasney's NPI (1346269966) is active in the NPPES registry as of the last update on 2007-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.