Physician Profile
Johannes H. Decker, MD
Unclaimed ProfileAbout Dr. Decker
Based in Stanford, CA, Johannes H. Decker, MD is listed in the NPI registry under radiology. Johannes is also listed as specializing in diagnostic radiology. Medicare claims data shows Johannes provided 1,444 services to 1,416 patients. The services billed most often include ct scan head or brain without contrast, mri scan of brain before and after contrast, and ct scan of upper spine without contrast.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
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
- (650) 723-4000
- Email not available
Practice Locations
300 PASTEUR DR
Stanford, CA 94305
453 Quarry Rd
Palo Alto, CA 94304
751 S Bascom Ave
San Jose, CA 95128
Conditions Evaluated or Diagnosed
Within Radiology (Unspecified) 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
- Appendicitis
- Chronic pelvic pain
- Diverticulitis
- Enlarged prostate
- Fatty liver disease
- Gallstones
- Kidney stones
- Ovarian cysts
- Severe stomach pain
- Uterine fibroids
Bone Health
- Osteoporosis
Brain & Spine
Breast
Cancer & Tumors
Chest & Lungs
Digestive
Foot & Ankle
- Heel pain
- Torn Achilles tendon
General
Head & Brain
Head & Face
Injuries
- Ankle sprain
- Bone fractures
- Concussion in Children
- Torn ACL
Joint & Muscle
- Hip pain
- Osteoarthritis
- Shoulder Pain
Joints & Orthopedics
- Avascular necrosis of the hip
- Baker's Cyst
- Rotator cuff tear
- Sacroiliac joint pain
- Stress fracture
- Tennis elbow
- Torn meniscus
Neck & Thyroid
Nerves & Neuropathy
- Carpal tunnel
Pelvic & Reproductive
Spine & Back
Vascular
- Aortic aneurysm
- Deep vein thrombosis
- Pelvic Congestion Syndrome
- Peripheral artery disease
- Varicose veins
Procedures & services
Biopsies
Biopsy
Bone Health
Breast Imaging
CT Scan
Diagnostic Scans
- Ankle MRI
- Bone Scan
- CT Scan With Contrast
- Hip MRI
- Kidney ultrasound
- Low-Dose Lung CT
- Neck CT Scan
- Open MRI
- Pelvic CT Scan
- Pelvic MRI
Interventional Radiology
MRI
Nuclear Medicine
Pain Relief Procedures
Specialized Imaging
Ultrasound
- Abdominal Ultrasound
- Carotid Ultrasound
- Leg Vein Ultrasound
- Pelvic ultrasound
- Scrotal Ultrasound
- Soft tissue ultrasound
- Thyroid ultrasound
- Ultrasound
X-Ray
X-Rays
Procedures Most Often Billed to Medicare
1,444 services · 1,416 patients · 24 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Ct scan head or brain without contrast | Imaging | 70450 |
401 | More often than most peers in Radiology |
| Mri scan of brain before and after contrast | Imaging | 70553 |
153 | More often than most peers in Radiology |
| Ct scan of upper spine without contrast | Imaging | 72125 |
130 | More often than most peers in Radiology |
| Ct scan of blood vessels of neck with contrast | Imaging | 70498 |
85 | More often than most peers in Radiology |
| Ct scan of blood vessels of head with contrast | Imaging | 70496 |
77 | More often than most peers in Radiology |
| Mri scan of blood vessels of head without contrast | Imaging | 70544 |
71 | As often as other peers in Radiology |
| Mri scan of brain without contrast | Imaging | 70551 |
62 | As often as other peers in Radiology |
| Mri scan of brain before and after contrast | Imaging | 70553 |
51 | More often than most peers in Radiology |
| Ct scan of lower spine without contrast | Imaging | 72131 |
44 | More often than most peers in Radiology |
| Ct scan of face without contrast | Imaging | 70486 |
41 | More often than most peers in 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.
Related specialists at this location 2
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.
Other radiologists in Stanford 8
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2017 at Other 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 CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Decker?
Dr. Decker is a radiologist in Stanford, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Radiology”.
NPI registry
What is Dr. Decker's address?
Dr. Decker is listed at 300 Pasteur Dr, Stanford, CA 94305. 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. Decker?
The number on file is (650) 723-4000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Decker?
Dr. Decker's National Provider Identifier is 1558892075. 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. Decker train?
Dr. Decker attended Other, graduating in 2017. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Decker have?
Dr. Decker has 9 years experience. Calculated from a graduation year of 2017, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Decker perform?
According to Medicare billing data, Dr. Decker performs imaging including ct scan head or brain without contrast and mri scan of brain before and after contrast. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Decker's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Decker. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.