Doctor profile · NPI 1457313314
Jason E Grennan
Diagnostic Radiology
Practice locations
- Reliant Medical Group Inc101 Cedar St , Milford, MA 01757Call 5086343100
- Gibson Community Hospital Association1120 N Melvin St , Gibson City, IL 60936Call 2177844251
- Reliant Medical Group Inc123 Summer St , Worcester, MA 01608Call 5083635000
- Reliant Medical Group Inc1400 Worcester St , Natick, MA 01760Call 5085952700
- Memorial Hospital Of Sheridan County1401 W 5th St , Sheridan, WY 82801Call 3076721000
- Big Horn Health Network1470 Sugarland Dr Suite 1, Sheridan, WY 82801Call 3076732411
- Hannibal Regional Healthcare System IncCall 5732481300
- Chickasaw Nation Division Of Health Chickasaw Nation Medical CenterCall 5804363980
- Prosser Public Hospital District Of Benton County200 Prosser Health Dr , Prosser, WA 99350Call 5097886022
- Reliant Medical Group Inc225 New Lancaster Rd , Leominster, MA 01453Call 9785346500
- Reliant Medical Group Inc234 Washington St , Hudson, MA 01749Call 5085952700
- Reliant Medical Group Inc24 Newton St , Southborough, MA 01772Call 5084864472
- Reliant Medical Group Inc241 N Main St , Leominster, MA 01453Call 5085952700
- Radiologists Of Cape Cod Hospital27 Park St , Hyannis, MA 02601Call 5088625000
- Mcfarland Clinic PcCall 5152394456
- Diagnostic Radiology PcCall 4024931212
- Radiologists Of Cape Cod HospitalCall 5088627777
- Radiology Consultants Of Iowa PlcCall 3193640121
- Southeast Iowa Regional Medical Center IncCall 3197681000
- Allen Memorial Hospital CorporationCall 3192353697
- East Memphis Pet Imaging LlcCall 9016853114
- Central Kentucky Radiology PllcCall 8592190542
- Lima Radiological AssociatesCall 4192269023
- Avera MckennanCall 6053224878
- Plains Radiology Services LlcCall 3083986400
- Radiologists Of Cape Cod Hospital35 Wilkens Ln , Hyannis, MA 02601Call 5088625000
- Reliant Medical Group Inc366 Shrewsbury St , Worcester, MA 01604Call 5085952700
- Reliant Medical Group Inc378 Maple Ave , Shrewsbury, MA 01545Call 5083687820
- Prairie Du Chien Memorial Hospital Association Inc37868 Us Hwy 18 , Prairie Du Chien, WI 53821Call 6083572000
- The Duluth Clinic Ltd400 E 3rd St , Duluth, MN 55805Call 2187868364
- The Duluth Clinic Ltd420 E 1st St , Duluth, MN 55805Call 2187868364
- Reliant Medical Group Inc460 Southbridge St , Auburn, MA 01501Call 5085952700
- Reliant Medical Group Inc5 Neponset St , Worcesteer, MA 01606Call 5085952300
- East Georgia Radiology Llc578 Sandy Pointe Pl , Ashland, NE 68003Call 8332286889
- East Memphis Pet Imaging Llc6005 Park Ave Suite 101b, Memphis, TN 38119Call 9016853114
- Radiology Consultants Of Iowa Plc701 10th St Se , Cedar Rapids, IA 52403Call 3193986643
- Reliant Medical Group Inc900 Union St , Westborough, MA 01581Call 5083668836
- Hannibal Regional Healthcare System IncPo Box Suite 1257, Hannibal, MO 63401Call 5732485460
Training in the source record
- Credential
- MD
- Medical school
- University Of Nebraska College Of Medicine
- Graduation year
- 1999
Residency, fellowship and board certification are not supplied by this CMS file.
Before you book
Ask the practice whether this doctor sees patients of your age for your concern, is accepting new patients, and participates in your exact insurance plan at this location.
Ask who will review your records and follow up if your concerns remain unresolved.
View the NPI Registry recordCMS measures of specific care
These are 2024 results reported for this clinician’s NPI. Each CMS rating describes one measure of care, not patient reviews or an overall doctor grade. The patients, ages and insurance types included depend on the measure and collection method; these are not necessarily Medicare-only or pediatric results. They do not establish performance at a particular current practice.
No individual clinical measures approved by CMS for profile display are available for this doctor in this release. Missing results do not mean poor care. Many clinicians or measures are not publicly reported.
Released 2026-09-10. Only CMS display-approved MIPS and QCDR clinical measures are shown; participation attestations and cost measures are excluded. CMS uses a benchmark drawn from best performers covering at least 10% of the relevant patient population, with an adjustment for small denominators. ModernDoc has not independently validated these ratings. Source data and reported rates · CMS rating methodology · Coverage and reporting limits.
Reported procedure activity
CMS attributes these procedures to this clinician through Original Medicare and Medicare Advantage claims and encounters. Counts span locations and are not unique-patient counts. They do not establish quality, current availability, or that a procedure is offered at any practice listed here. Other insurance populations are not included.
No procedure activity is available for display in this release. This does not mean this doctor has no experience.
CMS release 2026-10-15. CMS describes a 12-month observation window with a three-month claims-processing lag; this file does not provide exact start and end dates. Only categories CMS marks for profile display are shown. Source data · How CMS reports procedures.
Patient experience at affiliated groups
No group survey results are linked in this release. Missing information is not a judgment about this doctor’s care.
CMS group survey year 2024 · Released 2026-09-10. View the source data · How CMS reports these measures.
Reconciled from 38 source records. Individual patient reviews and an overall clinical-quality rating are not available.