Are you Stephen YAN CHUN To, M.D.? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 1798 N Garey Ave, Pomona, CA 91767
About Dr. To
Stephen YAN CHUN To, M.D. practices diagnostic radiology in Pomona, CA. Stephen is a 1991 graduate of University of California, Geffen School of Medicine. Medicare claims data shows Stephen provided 1,214 services to 1,140 patients. The services billed most often include x-ray of chest, 1 view, ct scan of chest without contrast, and ct scan head or brain without contrast. The provider's National Provider Identifier (NPI) is 1932165263.
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
- (909) 865-9532
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
1798 N GAREY AVE
Pomona, CA 91767
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
1,214 services · 1,140 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| X-ray of chest, 1 view | Imaging | 71045 |
266 | As often as other peers in Diagnostic Radiology |
| Ct scan of chest without contrast | Imaging | 71250 |
94 | As often as other peers in Diagnostic Radiology |
| Ct scan head or brain without contrast | Imaging | 70450 |
94 | Less often than most peers in Diagnostic Radiology |
| X-ray of chest, 2 views | Imaging | 71046 |
70 | Less often than most peers in Diagnostic Radiology |
| Ct scan of abdomen and pelvis with contrast | Imaging | 74177 |
60 | Less often than most peers in Diagnostic Radiology |
| X-ray of hip, 2-3 views | Imaging | 73502 |
59 | As often as other peers in Diagnostic Radiology |
| X-ray of knee, 3 views | Imaging | 73562 |
50 | As often as other peers in Diagnostic Radiology |
| X-ray of shoulder, minimum of 2 views | Imaging | 73030 |
48 | As often as other peers in Diagnostic Radiology |
| Ct scan of abdomen and pelvis without contrast | Imaging | 74176 |
40 | Less often than most peers in Diagnostic Radiology |
| X-ray of abdomen, 1 view | Imaging | 74018 |
39 | 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 2
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 Pomona 6
Same specialty, same city.
More connections — 24 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 1991 at University of California, Geffen School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs X-ray of chest, 1 view 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Stephen YAN CHUN To?
Stephen YAN CHUN To is a radiologist in Pomona, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Diagnostic Radiology”.
NPI registry
What is Stephen YAN CHUN To's address?
Stephen YAN CHUN To is listed at 1798 N Garey Ave, Pomona, CA 91767. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Stephen YAN CHUN To?
The number on file is (909) 865-9532. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Stephen YAN CHUN To?
Stephen YAN CHUN To's National Provider Identifier is 1932165263. 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 Stephen YAN CHUN To train?
Stephen YAN CHUN To attended University of California, Geffen School of Medicine, graduating in 1991. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Stephen YAN CHUN To have?
Stephen YAN CHUN To has 35 years experience. Calculated from a graduation year of 1991, reported in the CMS National Downloadable File.
CMS public data
What procedures does Stephen YAN CHUN To perform?
According to Medicare billing data, Stephen YAN CHUN To performs imaging including x-ray of chest, 1 view and ct scan of chest without contrast. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Stephen YAN CHUN To's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Stephen YAN CHUN To. If this is you, claiming it is free.
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