DR. DEAN TING-YUAN CHIANG M.D.
Prescription History 1760484455
Allergy & Immunology in Torrance, CA
What does Dr. Chiang prescribe?
In 2024, Dr. Chiang wrote 1,375 Medicare prescriptions for 27 medications. The most prescribed was Azelastine Hcl, with 258 prescriptions for 86 patients.
Medicare Part D only. These are prescriptions filled by people with Medicare drug coverage in 2024, from the CMS data released in 2026, the most recent year available. CMS does not publish medications with fewer than 11 prescriptions, so this is not a full list of what Dr. Chiang prescribes.
Medications 27 medications
Prescriptions filled under Medicare Part D in 2024. Select a medication to see what it is used for and how it compares with other California prescribers.
What it is used for
This medication is used to relieve nasal symptoms such as runny/itching/stuffy nose, sneezing, and post-nasal drip caused by allergies or other conditions.
Compared with California prescribers
Dr. Chiang wrote 258 prescriptions for Azelastine Hcl, about 5.5 times as often as the typical California prescriber of it (47). Medicare paid $27.47 per fill, versus $22.82 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Fluticasone is used to relieve seasonal and year-round allergic and non-allergic nasal symptoms, such as stuffy/runny nose, itching, and sneezing.
Compared with California prescribers
Dr. Chiang wrote 146 prescriptions for Fluticasone Propionate, about 2.9 times as often as the typical California prescriber of it (50). Medicare paid $32.31 per fill, versus $15.10 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Ipratropium is used to treat a runny nose caused by the common cold or seasonal allergies.
Compared with California prescribers
Dr. Chiang wrote 115 prescriptions for Ipratropium Bromide, about 3.3 times as often as the typical California prescriber of it (35). Medicare paid $25.70 per fill, versus $31.19 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This product is used to control and prevent symptoms (such as wheezing and shortness of breath) caused by asthma and ongoing lung disease (chronic obstructive pulmonary disease-COPD, which includes chronic bronchitis and emphysema).
Compared with California prescribers
Dr. Chiang wrote 92 prescriptions for Trelegy Ellipta, about 1.6 times as often as the typical California prescriber of it (57). Medicare paid $914.46 per fill, versus $801.62 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Omalizumab is used to control and prevent symptoms (such as wheezing and shortness of breath) caused by asthma that is due to year-round allergens.
Compared with California prescribers
Dr. Chiang wrote 80 prescriptions for Xolair, about 2.9 times as often as the typical California prescriber of it (27). Medicare paid $3,031.06 per fill, versus $3,323.95 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This product is used to control and prevent symptoms (wheezing and shortness of breath) caused by asthma or ongoing lung disease (chronic obstructive pulmonary disease-COPD, which includes chronic bronchitis and emphysema).
Compared with California prescribers
Dr. Chiang wrote 69 prescriptions for Wixela Inhub, about 2.5 times as often as the typical California prescriber of it (27). Medicare paid $140.54 per fill, versus $186.48 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to prevent and decrease symptoms (wheezing and trouble breathing) caused by asthma and ongoing lung disease (chronic obstructive pulmonary disease-COPD, including chronic bronchitis and emphysema).
Compared with California prescribers
Dr. Chiang wrote 54 prescriptions for Breo Ellipta, about 1.7 times as often as the typical California prescriber of it (32). Medicare paid $601.94 per fill, versus $491.19 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This product is used to control and prevent symptoms (wheezing and shortness of breath) caused by asthma or ongoing lung disease (chronic obstructive pulmonary disease-COPD, which includes chronic bronchitis and emphysema).
Compared with California prescribers
Dr. Chiang wrote 54 prescriptions for Fluticasone-Salmeterol, about 2.3 times as often as the typical California prescriber of it (24). Medicare paid $149.92 per fill, versus $155.85 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat certain skin conditions (eczema, prurigo nodularis) and a certain esophagus problem (eosinophilic esophagitis).
Compared with California prescribers
Dr. Chiang wrote 52 prescriptions for Dupixent Syringe, about 2.1 times as often as the typical California prescriber of it (25). Medicare paid $3,859.01 per fill, versus $3,840.57 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Montelukast is used to control and prevent symptoms caused by asthma (such as wheezing and shortness of breath).
Compared with California prescribers
Dr. Chiang wrote 52 prescriptions for Montelukast Sodium, about as often as the typical California prescriber of it (49). Medicare paid $7.84 per fill, versus $10.71 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Albuterol (also known as salbutamol) is used to prevent and treat wheezing and shortness of breath caused by breathing problems (such as asthma, chronic obstructive pulmonary disease).
Compared with California prescribers
Dr. Chiang wrote 51 prescriptions for Albuterol Sulfate Hfa, about 88% as often as the typical California prescriber of it (58). Medicare paid $17.78 per fill, versus $28.70 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Gabapentin is used with other medications to prevent and control seizures.
Compared with California prescribers
Dr. Chiang wrote 44 prescriptions for Gabapentin, about half as often as the typical California prescriber of it (80). Medicare paid $7.29 per fill, versus $15.63 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Prednisone is used to treat conditions such as arthritis, blood disorders, breathing problems, severe allergies, skin diseases, cancer, eye problems, and immune system disorders.
Compared with California prescribers
Dr. Chiang wrote 44 prescriptions for Prednisone, about as often as the typical California prescriber of it (40). Medicare paid $2.21 per fill, versus $5.64 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat a variety of skin conditions (such as eczema, dermatitis, allergies, rash).
Compared with California prescribers
Dr. Chiang wrote 37 prescriptions for Triamcinolone Acetonide, about 87% as often as the typical California prescriber of it (43). Medicare paid $9.18 per fill, versus $10.03 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Levocetirizine is an antihistamine used to relieve allergy symptoms such as watery eyes, runny nose, itching eyes/nose, and sneezing.
Compared with California prescribers
Dr. Chiang wrote 35 prescriptions for Levocetirizine Dihydrochloride, about 65% as often as the typical California prescriber of it (54). Medicare paid $9.49 per fill, versus $10.77 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat certain skin conditions (eczema, prurigo nodularis) and a certain esophagus problem (eosinophilic esophagitis).
Compared with California prescribers
Dr. Chiang wrote 23 prescriptions for Dupixent Pen, about 77% as often as the typical California prescriber of it (30). Medicare paid $3,565.35 per fill, versus $3,866.20 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Omeprazole is used to treat certain stomach and esophagus problems (such as acid reflux, ulcers).
Compared with California prescribers
Dr. Chiang wrote 20 prescriptions for Omeprazole, about 26% as often as the typical California prescriber of it (78). Medicare paid $4.49 per fill, versus $11.26 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Fluticasone is used to treat a certain condition of the nose (chronic rhinosinusitis with or without nasal polyps).
Compared with California prescribers
Dr. Chiang wrote 20 prescriptions for Xhance, about 85% as often as the typical California prescriber of it (23). Medicare paid $667.45 per fill, versus $804.93 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Hydroxyzine is used to treat itching caused by allergies.
Compared with California prescribers
Dr. Chiang wrote 18 prescriptions for Hydroxyzine Hcl, about 64% as often as the typical California prescriber of it (28). Medicare paid $8.59 per fill, versus $13.85 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This product is used to control and prevent symptoms (wheezing and shortness of breath) caused by asthma.
Compared with California prescribers
Dr. Chiang wrote 17 prescriptions for Advair Hfa, about 80% as often as the typical California prescriber of it (21). Medicare paid $487.16 per fill, versus $440.07 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Amoxicillin/clavulanic acid is a combination penicillin-type antibiotic used to treat a wide variety of bacterial infections.
Compared with California prescribers
Dr. Chiang wrote 15 prescriptions for Amoxicillin-Clavulanate Potass, about half as often as the typical California prescriber of it (26). Medicare paid $5.38 per fill, versus $9.18 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat a variety of skin conditions (such as eczema, psoriasis, dermatitis, allergies, rash).
Compared with California prescribers
Dr. Chiang wrote 15 prescriptions for Clobetasol Propionate, about 40% as often as the typical California prescriber of it (38). Medicare paid $42.47 per fill, versus $43.46 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Famotidine is used to treat ulcers of the stomach and intestines and to prevent intestinal ulcers from coming back after they have healed.
Compared with California prescribers
Dr. Chiang wrote 15 prescriptions for Famotidine, about 28% as often as the typical California prescriber of it (54). Medicare paid $19.32 per fill, versus $12.66 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used in emergencies to treat very serious allergic reactions to insect stings/bites, foods, drugs, or other substances.
Compared with California prescribers
Dr. Chiang wrote 14 prescriptions for Epinephrine, about 65% as often as the typical California prescriber of it (22). Medicare paid $154.12 per fill, versus $184.44 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Tiotropium is used to treat lung diseases such as asthma and COPD (bronchitis, emphysema).
Compared with California prescribers
Dr. Chiang wrote 13 prescriptions for Spiriva Respimat, about half as often as the typical California prescriber of it (31). Medicare paid $890.91 per fill, versus $597.16 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Fluticasone is used to control and prevent symptoms (such as wheezing and shortness of breath) caused by asthma.
Compared with California prescribers
Dr. Chiang wrote 11 prescriptions for Arnuity Ellipta, about half as often as the typical California prescriber of it (22). Medicare paid $235.95 per fill, versus $283.30 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This product is used to control and prevent symptoms (such as wheezing and shortness of breath) caused by ongoing lung disease (chronic obstructive pulmonary disease-COPD, which includes chronic bronchitis and emphysema).
Compared with California prescribers
Dr. Chiang wrote 11 prescriptions for Breztri Aerosphere, about 27% as often as the typical California prescriber of it (40). Medicare paid $674.11 per fill, versus $742.95 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Questions about Dr. Chiang’s prescriptions
What does Dr. Chiang prescribe most?
In 2024 Medicare Part D data, Dr. Chiang's most prescribed medications were Azelastine Hcl (258), Fluticasone Propionate (146) and Ipratropium Bromide (115).
How does Dr. Chiang's prescribing compare with other California prescribers?
Of the 27 medications with a state comparison, Dr. Chiang prescribes 9 more often than the typical California prescriber, 7 about as often and 11 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Chiang prescribes?
No. It covers prescriptions filled by people with Medicare Part D drug coverage in 2024, and CMS leaves out any medication with fewer than 11 prescriptions.
About this data
This page shows one provider’s slice of public Medicare files. NPI Profile does not receive prescriptions or patient records.
| Source | What it provides here | Data year |
|---|---|---|
| CMS Medicare Part D Prescribers by Provider and Drug | Each medication, prescriptions, patients, 30-day fills, days of medication and cost. State comparisons average the California prescribers of the same medication and form, where at least five wrote it. | 2024 (released 2026, the most recent available) |
| CMS Medicare Part D Drug Spending Dashboard | What each medication is used for. | 2024 |
- Only prescriptions filled by people with Medicare Part D drug coverage are counted. Private insurance, Medicaid and cash purchases are not.
- CMS leaves out medications with fewer than 11 prescriptions and hides patient counts under 11.
- Cost per fill is what the plan and the patient paid the pharmacy together, not what you pay at the counter.
- Medication descriptions are summaries from CMS. They are not medical advice; ask a health care professional about any medication.
