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Edit this profileAt a glance
- 3291 Loma Vista Rd, Ventura, CA 93003
About Dr. Mcmahan
Based in Ventura, CA, John McMahan, M.D. is listed in the NPI registry under diagnostic radiology. Medicare claims data shows John provided 38 services to 33 patients. The services billed most often include x-ray of chest, 1 view. NPI 1104980317 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
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
- (805) 652-6556
- Email not available
Practice Locations
3291 LOMA VISTA RD
Ventura, CA 93003
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
Breast Imaging
Abdominal imaging
Biopsies
Bone Density
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
38 services · 33 patients · 1 distinct code
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| X-ray of chest, 1 view | Imaging | 71045 |
38 | 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.
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 Ventura 7
Same specialty, same city.
More connections — 8 related providers in 1 group
Also performs X-ray of chest, 1 view 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does John McMahan specialize in?
John McMahan is a radiologist in Ventura, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Diagnostic Radiology”.
NPI registry
Where is John McMahan located?
John McMahan is listed at 3291 Loma Vista Rd, Ventura, CA 93003. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is John McMahan's phone number?
The number on file is (805) 652-6556. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for John McMahan?
John McMahan's National Provider Identifier is 1104980317. 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
How much experience does John McMahan have?
John McMahan has 20+ years experience. Registered with an NPI since 2006. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does John McMahan do most often?
According to Medicare billing data, John McMahan performs imaging including x-ray of chest, 1 view. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is John McMahan's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by John McMahan. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.