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- 1798 N Garey Ave, Pomona, CA 91767
About Dr. Chien
Alexander J. Chien, MD is a healthcare provider in Pomona, CA specializing in diagnostic radiology. Alexander trained at University of Michigan Medical School, graduating in 1997. According to Medicare claims data, Alexander cared for 180 Medicare patients across 190 services. The services billed most often include ct scan of abdomen and pelvis with contrast, ct scan of chest with contrast, and ct scan of chest without contrast. This provider record is associated with NPI 1255313318.
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) 865-9500
- 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
190 services · 180 patients · 9 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Ct scan of abdomen and pelvis with contrast | Imaging | 74177 |
34 | Less often than most peers in Diagnostic Radiology |
| Ct scan of chest with contrast | Imaging | 71260 |
34 | Less often than most peers in Diagnostic Radiology |
| Ct scan of chest without contrast | Imaging | 71250 |
29 | Less often than most peers in Diagnostic Radiology |
| Nuclear medicine study from skull base to mid-thigh with ct scan | Imaging | 78815 |
22 | Less often than most peers in Diagnostic Radiology |
| X-ray of chest, 2 views | Imaging | 71046 |
17 | Less often than most peers in Diagnostic Radiology |
| Ct scan of abdomen and pelvis without contrast | Imaging | 74176 |
16 | Less often than most peers in Diagnostic Radiology |
| Imaging guidance for procedure, 60 minutes or less | Imaging | 76000 |
15 | Less often than most peers in Diagnostic Radiology |
| Ct scan of abdomen and pelvis before and after contrast | Imaging | 74178 |
12 | Less often than most peers in Diagnostic Radiology |
| Complete ultrasound scan behind abdominal cavity | Imaging | 76770 |
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 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 Michigan Medical School 8
Other providers in the same specialty who trained at the same institution.
Class of 1997 at University of Michigan Medical School 8
Providers who graduated from the same medical school in the same year.
Also performs Ct scan of abdomen and pelvis with contrast 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Chien?
Dr. Chien 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 Dr. Chien's address?
Dr. Chien 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 Dr. Chien?
The number on file is (909) 865-9500. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Chien's NPI number?
Dr. Chien's National Provider Identifier is 1255313318. 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. Chien train?
Dr. Chien attended University of Michigan Medical School, graduating in 1997. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Chien been practicing?
Dr. Chien has 29 years experience. Calculated from a graduation year of 1997, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Chien perform?
According to Medicare billing data, Dr. Chien performs imaging including ct scan of abdomen and pelvis with contrast and ct scan of chest with contrast. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Chien confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Chien. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.