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- 1448 S. San Gabriel Bl., San Gabriel, CA 91776
About Dr. Chien
Oscar L. Chien, M.D. is a healthcare provider in San Gabriel, CA specializing in geriatric medicine. According to Medicare claims data, Oscar cared for 1,394 Medicare patients across 5,234 services. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, and subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes. This provider record is associated with NPI 1679675904.
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
- (626) 569-2888
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
1448 S. SAN GABRIEL BL.
San Gabriel, CA 91776
Conditions Commonly Evaluated or Treated
Within Geriatric Medicine 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
Balance & Mobility
- Senior Dizziness
- Walking Problems
Blood Health
- Senior Anemia
Bones & Joints
- Broken Hip Recovery
- Osteoarthritis
Brain & Nerves
- Delirium
- Dementia with behavioral symptoms
- Essential tremor
- Normal Pressure Hydrocephalus
- Parkinson's disease
Cognitive Health
- Dementia Wandering
- Mild cognitive impairment
Digestive
- Poor Appetite In Seniors
- Constipation
- Fecal incontinence
- Swallowing difficulties
General Health
- Dehydration In Seniors
- Elderly Frailty
- Senior Malnutrition
- Unexplained Weight Loss
Geriatric care
- Agitation in Dementia
Hormone Health
- Underactive Thyroid In Seniors
Mental Health
- Restlessness And Agitation
- Senior Anxiety
- Senior Depression
- Caregiver burnout
Mobility
- Muscle Loss And Weakness
- Balance Problems and Fall Risk
Pain
- Chronic Pain In Seniors
Skin & Wounds
- Diabetic Foot Sores
- Thinning and Tearing Skin
- Bedsores
- Non-Healing Wounds
Sleep
- Senior Insomnia
Most searched conditions
- Alzheimer's disease
- Dementia
- Frequent falls
- Managing multiple medications
- Memory loss
- Osteoporosis
Cardiovascular
Ears & Hearing
- Hearing loss
Infections
Joints & Pain
- Gout
- Polymyalgia rheumatica
Lung Health
Men's Health
Oral Health
Spine & Pain
Urinary & Bladder
- Recurrent urinary tract infections
- Urinary incontinence in women
Urinary Health
- Waking Up to Pee
Procedures & services
Brain & memory
Cardiovascular
- Orthostatic Blood Pressure Check
Care Placement
- Nursing Home Placement Assessment
Caregiver Support
- Dementia Caregiver Training
Chronic Disease Management
- Senior Diabetes Target Adjustment
Cognitive Health
- Dementia Wandering Safety Plan
Digestive
- Constipation And Bowel Management
- Swallowing safety evaluation coordination
Elder care
- Caregiver training and support
End-of-Life Planning
- POLST Or DNR Consultation
Foot Care
- Routine Senior Foot And Nail Care
General Geriatric Care
- Senior Telehealth Consultation
General Health
- Outpatient IV Hydration
Geriatric care
- Dementia Behavior Support Coaching
Home Care
- Home Health Certification
- In-Home Care Needs Assessment
Legal & Cognitive
- Mental Competency Evaluation
Mental Health
- Agitation And Behavior Management Planning
- Senior Depression Screening
Mobility & Equipment
- Walker Or Wheelchair Prescription
Nutrition
- High-Calorie Senior Nutrition Plan
- Senior Nutrition Assessment
Outpatient Care
- In-Home Doctor Visit
- Post-hospital transitional care
Pain Management
- Safe Senior Pain Management Plan
Palliative & Hospice
- Comfort care transition
- Hospice Eligibility Evaluation
Patient Safety
- Elder Abuse And Neglect Assessment
Planning & Support
- Advance Care Planning
- Assisted Living Placement Assessment
- Caregiver Counseling
- Long-Term Care Insurance Evaluation
- Medical Power Of Attorney Consultation
Preventive Care
- Chronic Illness Checkup
- Medicare annual wellness visit
- Shingles And Senior Vaccinations
Respiratory
- Oxygen Therapy Evaluation
Safety & Daily Function
- Daily Living Activities Evaluation
- Senior Driving Safety Assessment
- Home Safety Evaluation
Sensory Health
- Hearing Aid Fitting Referral
Surgical Clearance
- Senior Pre-Surgery Clearance
Urinary & Bladder
- Postvoid residual measurement
- Urinary Catheter Change And Care
Urinary Health
- Scheduled Toileting Program
Wounds & skin
Routine Blood Tests
Most searched procedures
- Comprehensive geriatric assessment
- Fall risk assessment
- Memory testing
Bone Health
- Osteoporosis Medication Consultation
Ear Care
- Earwax removal
Medication Management
- Deprescribing consultation
Mobility
Pain & Injections
Wound Care
- Surgical Wound Care
Procedures Most Often Billed to Medicare
5,234 services · 1,394 patients · 16 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Influenza vaccine, trivalent, 0.5 ml dosage | Treatment | 90658 |
37 | Too few peers to compare |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
2,140 | More than most peers in Geriatric Medicine |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
1,199 | More than most peers in Geriatric Medicine |
| Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | Office visit | 99310 |
727 | More than most peers in Geriatric Medicine |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
155 | More than most peers in Geriatric Medicine |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
140 | More often than most peers in Geriatric Medicine |
| Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians | Billing code | G0179 |
134 | More than most peers in Geriatric Medicine |
| Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes | Office visit | 99349 |
131 | More often than most peers in Geriatric Medicine |
| Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | Office visit | 99309 |
131 | As often as other peers in Geriatric Medicine |
| Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more | Office visit | 99306 |
130 | More often than most peers in Geriatric Medicine |
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 8
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.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 10 related providers in 2 groups
Class of 1990 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Influenza vaccine, trivalent, 0.5 ml dosage 2
Providers in CA who bill this service to Medicare most often.
Common questions
What is Oscar L. Chien's specialty?
Oscar L. Chien is a geriatrician in San Gabriel, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Geriatric Medicine”.
NPI registry
Where can I find Oscar L. Chien?
Oscar L. Chien is listed at 1448 S. San Gabriel Bl., San Gabriel, CA 91776. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Oscar L. Chien?
The number on file is (626) 569-2888. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Oscar L. Chien's NPI number?
Oscar L. Chien's National Provider Identifier is 1679675904. 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
What is Oscar L. Chien's education?
Oscar L. Chien attended Other, graduating in 1990. This comes from the CMS National Downloadable File.
CMS public data
How long has Oscar L. Chien been practicing?
Oscar L. Chien has 36 years experience. Calculated from a graduation year of 1990, reported in the CMS National Downloadable File.
CMS public data
What is Oscar L. Chien known for?
According to Medicare billing data, Oscar L. Chien provides treatments such as influenza vaccine, trivalent, 0.5 ml dosage, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Oscar L. Chien confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Oscar L. Chien. If this is you, claiming it is free.
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