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GRENNAN, JASONMD NPI 1457313314 Clinician

Diagnostic Radiology · OMAHA, NE

Specialty Diagnostic Radiology — from billed Medicare claims
Trained UNIVERSITY OF NEBRASKA COLLEGE OF MEDICINE — medical school, self-reported to CMS
In practice about 27 years since medical school (class of 1999, self-reported to CMS)
Location OMAHA, NE · NPPES registered location
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 50 codes billed · 19,386 disclosed services (CY2024 — most recent year in data)
Current groups
member of 26 groups; the volumes below are this clinician's personal volume and are not attributed to any single group

Group affiliation since 2019

20192026
BIG HORN HEALTH NETWORK
2026
EAST GEORGIA RADIOLOGY LLC
2026
GIBSON COMMUNITY HOSPITAL ASSOCIATION
2026
GRAND ISLAND RADIOLOGY ASSOCIATES PC
2026
GREAT PLAINS RADIOLOGY LLC
2026
MCFARLAND CLINIC PC
2026
MEMORIAL HOSPITAL OF SHERIDAN COUNTY
2026
RADIOLOGY CONSULTANTS OF IOWA PLC
2026
SOUTHEAST IOWA REGIONAL MEDICAL CENTER INC
2026
TRINITY HEALTH
2026
AVERA MCKENNAN
2025–2026
EAST MEMPHIS PET IMAGING LLC
2025–2026
PRAIRIE DU CHIEN MEMORIAL HOSPITAL ASSOCIATION INC
2025–2026
STATE UNIVERSITY OF IOWA
2025–2026
HANNIBAL REGIONAL HEALTHCARE SYSTEM INC
2024–2026
RADIOLOGISTS OF CAPE COD HOSPITAL
2024–2026
ALLEN MEMORIAL HOSPITAL CORPORATION
2023–2026
DIAGNOSTIC RADIOLOGY PC
2023–2026
FLORIDA KEYS RADIOLOGY ASSOCIATES LLP
2022–2026
PROSSER PUBLIC HOSPITAL DISTRICT OF BENTON COUNTY
2022–2026
THE DULUTH CLINIC LTD
2022–2026
LIMA RADIOLOGICAL ASSOCIATES
2021–2026
CENTRAL KENTUCKY RADIOLOGY PLLC
2020–2026
CHICKASAW NATION DIVISION OF HEALTH
2020–2026
PLAINS RADIOLOGY SERVICES LLC
2019–2026
RELIANT MEDICAL GROUP INC
2019–2026
RADIOLOGIC MEDICAL SERVICES PC
2024–2025
CHEYENNE RADIOLOGY GROUP
2023–2025
ASSOCIATED RADIOLOGISTS, LTD.
2022–2025
ZIA DIAGNOSTIC IMAGING
2024
MEMORIAL HOSPITAL OF SHERIDAN COUNTY
2023–2024
TRINITY HEALTH
2023–2024
RADIOLOGY ASSOCIATES OF TALLAHASSEE PA
2021–2024
BAPTIST PHYSICIAN NETWORK
2020–2024
MCFARLAND CLINIC PC
2020–2024
GRAND ISLAND RADIOLOGY ASSOCIATES PC
2019–2024
EAST MEMPHIS PET IMAGING LLC
2023
RADIOLOGY PROFESSIONALS OF HUTCHINSON LLC
2021–2023
UROLOGY CANCER CENTER PC
2021–2023
KENT DIAGNOSTIC RADIOLOGY ASSOCIATE PA
2020–2023
LECONTE RADIOLOGY PC
2020–2023
MEMPHIS PHYSICIANS RADIOLOGICAL GROUP PC
2020–2023
PHYSICIANS OF CAPE COD HOSPITAL
2020–2023
PRAIRIE DU CHIEN MEMORIAL HOSPITAL ASSOCIATION INC
2020–2023
RADIOLOGY CONSULTANTS PC
2022
NRHS RADIOLOGY ASSOCIATES
2021–2022
RADIOLOGY ASSOCIATES OF VENICE AND ENGLEWOOD PA
2021–2022
TULSA X-RAY LABORATORY INC
2019–2021
ROCKY MOUNTAIN RADIOLOGY SERVICES, LLC
2019–2020
THE DULUTH CLINIC LTD
2019–2020
YELLOWSTONE RADIOLOGY PC
2019–2020
DHEW IND HLTH SV HLTH SVS AND MNTL HLTH ADM
2019
HEGG MEMORIAL HOSPITAL
2019
PRIME MEDICAL ASSOCIATES LLC
2019

The roster archive begins in 2019, so a span starting at 2019 may reach back further. Membership spans only — no volume is attributed to any group here.

NPPES registry · CMS Doctors & Clinicians registry · Medicare Part B physician/supplier claims · NPPES record last updated 2025-09

Year: 2024 · 2023 · 2022  · 2021  · 2020 

Provider overview · all codes · CY2024

The full analytics for this provider

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The billed-volume positioning, practice focus, and economics behind this provider — computed on the same disclosed Medicare Part B data.

This provider's disclosed Medicare payments across all codes were in CY2024. Included with Platform.

  • Payment, service & beneficiary totals — the disclosed scale, all codes
  • Practice profile — focus & reach — top codes by share of services
  • Office vs. facility setting mix — place-of-service code split
  • Volume over five years — discrete yearly counts, no rate
  • Peer positioning — service volume — percentile among specialty peers, cohort & year disclosed
  • Peer positioning — code breadth — how many codes billed, vs peers

Peer positioning shows billed-volume and code-breadth positions among specialty peers, not measures of care (a provider's true volume position can only be higher, never lower). All figures disclosed Medicare Part B fee-for-service; volumes are personal to this NPI, not attributed to any group.

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Procedures billed to Medicare Part B (2024)

Medicare Part B FFS · CY2024 · as published by CMS
CodeDescription Services Beneficiary-episodes Avg charge Avg Medicare payment
Q9967 Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml
A9573 Injection, gadopiclenol, 1 ml
71046 X-ray of chest, 2 views
71045 X-ray of chest, 1 view
70450 Ct scan head or brain without contrast
74177 Ct scan of abdomen and pelvis with contrast
76536 Ultrasound scan of head and neck soft tissue
71250 Ct scan of chest without contrast
74176 Ct scan of abdomen and pelvis without contrast
71275 Ct scan of blood vessels of chest with contrast
73030 X-ray of shoulder, minimum of 2 views
72125 Ct scan of upper spine without contrast
73562 X-ray of knee, 3 views
73630 X-ray of foot, minimum of 3 views
73502 X-ray of hip, 2-3 views
72100 X-ray of lower and sacral spine, 2-3 views
73110 X-ray of wrist, minimum of 3 views
70496 Ct scan of blood vessels of head with contrast
71260 Ct scan of chest with contrast
70498 Ct scan of blood vessels of neck with contrast
74018 X-ray of abdomen, 1 view
93971 Ultrasound study of one arm or leg veins with compression and maneuvers
73610 X-ray of ankle, minimum of 3 views
71271 Low dose ct scan of chest for lung cancer screening
73130 X-ray of hand, minimum of 3 views
70551 Mri scan of brain without contrast
72131 Ct scan of lower spine without contrast
76705 Limited ultrasound scan of abdomen
73080 X-ray of elbow, minimum of 3 views
70553 Mri scan of brain before and after contrast
72197 Mri scan of pelvis before and after contrast
72050 X-ray of upper spine, 4-5 views
76775 Limited ultrasound scan behind abdominal cavity
71101 X-ray of ribs on side of body, minimum of 3 views
70486 Ct scan of face without contrast
72170 X-ray of pelvis, 1-2 views
72148 Mri scan of lower spinal canal without contrast
73700 Ct scan of leg without contrast
74019 X-ray of abdomen, 2 views
74178 Ct scan of abdomen and pelvis before and after contrast
72128 Ct scan of middle spine without contrast
73552 X-ray of thigh bone, minimum 2 views
74174 Ct scan of blood vessels of abdomen and pelvis with contrast
74183 Mri scan of abdomen before and after contrast
72040 X-ray of upper spine, 2-3 views
73140 X-ray of finger, minimum of 2 views
73564 X-ray of knee, 4 or more views
72192 Ct scan of pelvis without contrast
73523 X-ray of both hips, minimum of 5 views
73560 X-ray of knee, 1-2 views

These are this provider's own Medicare Part B fee-for-service volumes (CMS public data). CMS suppresses rows with fewer than 11 beneficiaries, so low-volume codes may be missing entirely — absence is not zero. Beneficiary-episodes count CMS's per-setting beneficiary figures, not unique patients. Average charge and average Medicare payment are weighted by service volume across office and facility settings. Volumes on this page are personal to the NPI and are not attributed to any physician group. See Methods & Sources.