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Edit this profileAt a glance
- 1000 N Oak Ave, Marshfield, WI 54449
About Dr. Warner
Based in Marshfield, WI, John J. Warner, MD is listed in the NPI registry under diagnostic radiology. John graduated from University of Wisconsin School of Medicine in 1983. Medicare claims data shows John provided 83 services to 83 patients. The services billed most often include ct scan head or brain without contrast, x-ray of lower and sacral spine, 2-3 views, and mri scan of brain before and after contrast. NPI 1831291871 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (715) 389-3555
- Email not available
Practice Locations
1000 N OAK AVE
Marshfield, WI 54449
Conditions Evaluated or Diagnosed
Within Diagnostic Radiology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Abdomen & Pelvis
- Abdominal Pain
- Appendicitis
- Diverticulitis
- Enlarged prostate
- Gallstones
- Kidney stones
- Liver Lesions
- Ovarian cysts
Bone & Joint
- Ankle Sprain or Fracture
- Bone fractures
- Heel pain
- Hip osteoarthritis
- Osteoporosis
- Rotator cuff tear
- Torn meniscus
Brain & Head
- Brain aneurysm
- Brain tumor
- Concussion in Children
- Migraines
- Sinus infection
- Transient ischemic attack
Brain & nerves
Breast
Chest & Heart
General
Heart & blood vessels
Joint & bone
Liver & digestion
Lungs & breathing
Men's health
Neck & Thyroid
Nerve pain
Pelvic health
Spine
Spine & back
Vascular
Women's health
Procedures & services
Abdominal imaging
Biopsies
Bone Density
Breast Imaging
CT Scan
Digestive & liver
Fluoroscopy
General imaging
Heart & blood vessels
Joint & bone
MRI
Nuclear Medicine
Pelvic imaging
Screening & Prevention
Spine & back
Ultrasound
- Abdominal Ultrasound
- Carotid Ultrasound
- Leg Vein Ultrasound
- Pelvic ultrasound
- Scrotal Ultrasound
- Thyroid ultrasound
- Ultrasound
Urinary & kidney
Women's health
X-Ray
Procedures Most Often Billed to Medicare
83 services · 83 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Ct scan head or brain without contrast | Imaging | 70450 |
34 | Less often than most peers in Diagnostic Radiology |
| X-ray of lower and sacral spine, 2-3 views | Imaging | 72100 |
25 | Less often than most peers in Diagnostic Radiology |
| Mri scan of brain before and after contrast | Imaging | 70553 |
13 | Less often than most peers in Diagnostic Radiology |
| X-ray of upper spine, 2-3 views | Imaging | 72040 |
11 | Less often than most peers in Diagnostic Radiology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other radiologists at this location 1
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 3
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 31 related providers in 4 groups
Other radiologists in Marshfield 7
Same specialty, same city.
Trained at University of Wisconsin School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1983 at University of Wisconsin School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Ct scan head or brain without contrast 8
Providers in WI who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Warner?
Dr. Warner is a radiologist in Marshfield, WI. That is the designation recorded for this NPI in the federal registry, where it is listed as “Diagnostic Radiology”.
NPI registry
What is Dr. Warner's address?
Dr. Warner is listed at 1000 N Oak Ave, Marshfield, WI 54449. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Warner?
The number on file is (715) 389-3555. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Warner?
Dr. Warner's National Provider Identifier is 1831291871. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Warner train?
Dr. Warner attended University of Wisconsin School of Medicine, graduating in 1983. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Warner have?
Dr. Warner has 43 years experience. Calculated from a graduation year of 1983, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Warner perform?
According to Medicare billing data, Dr. Warner performs imaging including ct scan head or brain without contrast and x-ray of lower and sacral spine, 2-3 views. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Warner's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Warner. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.