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Edit this profileAt a glance
- 505 Parnassus Ave, San Francisco, CA 94143
About Dr. Dillon
William P. Dillon, MD practices diagnostic radiology in San Francisco, CA. William is a 1978 graduate of University of California, Geffen School of Medicine. William is also listed as specializing in nuclear medicine. Medicare claims data shows William provided 213 services to 204 patients. The services billed most often include ct scan head or brain without contrast, review by radiologist of ct guidance for needle placement, and mri scan of brain before and after contrast. The provider's National Provider Identifier (NPI) is 1386609337.
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
- (415) 353-1668
- Email not available
Practice Locations
505 PARNASSUS AVE
San Francisco, CA 94143
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
213 services · 204 patients · 9 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level | Procedure | 64483 |
21 | Too few peers to compare |
| Injection of anesthetic and/or steroid drug into upper or middle spine nerve root using imaging guidance, single level | Procedure | 64479 |
14 | Too few peers to compare |
| Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level | Procedure | 64484 |
13 | Too few peers to compare |
| Ct scan head or brain without contrast | Imaging | 70450 |
63 | Less often than most peers in Diagnostic Radiology |
| Review by radiologist of ct guidance for needle placement | Imaging | 77012 |
26 | Too few peers to compare |
| Mri scan of brain before and after contrast | Imaging | 70553 |
24 | Less often than most peers in Diagnostic Radiology |
| Ct scan of upper spine without contrast | Imaging | 72125 |
23 | Less often than most peers in Diagnostic Radiology |
| Ct scan of blood vessels of head with contrast | Imaging | 70496 |
16 | Less often than most peers in Diagnostic Radiology |
| Ct scan of blood vessels of neck with contrast | Imaging | 70498 |
13 | 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 3
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 San Francisco 5
Same specialty, same city.
More connections — 22 related providers in 3 groups
Trained at University of California, Geffen School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1978 at University of California, Geffen School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level 6
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Dillon specialize in?
Dr. Dillon is a radiologist in San Francisco, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Diagnostic Radiology”.
NPI registry
Where is Dr. Dillon located?
Dr. Dillon is listed at 505 Parnassus Ave, San Francisco, CA 94143. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Dillon's phone number?
The number on file is (415) 353-1668. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Dillon?
Dr. Dillon's National Provider Identifier is 1386609337. 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. Dillon go to medical school?
Dr. Dillon attended University of California, Geffen School of Medicine, graduating in 1978. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Dillon have?
Dr. Dillon has 48 years experience. Calculated from a graduation year of 1978, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Dillon do most often?
According to Medicare billing data, Dr. Dillon performs procedures including injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level, injection of anesthetic and/or steroid drug into upper or middle spine nerve root using imaging guidance, single level and injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level; reads or performs imaging such as ct scan head or brain without contrast and review by radiologist of ct guidance for needle placement. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Dillon's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Dillon. If this is you, claiming it is free.
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