DR. DOUGLAS FREEMAN CHU M.D.
Prescription History 1841237443
Ophthalmology in Honolulu, HI
What does Dr. Chu prescribe?
In 2024, Dr. Chu wrote 1,445 Medicare prescriptions for 16 medications. The most prescribed was Latanoprost, with 526 prescriptions for 156 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. Chu prescribes.
Medications 16 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 Hawaii prescribers.
What it is used for
Latanoprost is used to treat high pressure inside the eye due to glaucoma (open angle type) or other eye diseases (such as ocular hypertension).
Compared with Hawaii prescribers
Dr. Chu wrote 526 prescriptions for Latanoprost, about 3.6 times as often as the typical Hawaii prescriber of it (145). Medicare paid $10.80 per fill, versus $20.69 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 high pressure inside the eye due to glaucoma (open angle-type) or other eye diseases (such as ocular hypertension).
Compared with Hawaii prescribers
Dr. Chu wrote 234 prescriptions for Timolol Maleate, about 3 times as often as the typical Hawaii prescriber of it (78). Medicare paid $50.51 per fill, versus $29.33 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 eye conditions due to inflammation or injury.
Compared with Hawaii prescribers
Dr. Chu wrote 114 prescriptions for Prednisolone Acetate, about as often as the typical Hawaii prescriber of it (123). Medicare paid $49.55 per fill, versus $48.46 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
This medication is used to treat open-angle glaucoma or high fluid pressure in the eye.
Compared with Hawaii prescribers
Dr. Chu wrote 95 prescriptions for Brimonidine Tartrate, about 1.4 times as often as the typical Hawaii prescriber of it (70). Medicare paid $178.30 per fill, versus $85.70 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
This product contains two drugs used to treat high pressure inside the eye due to glaucoma (open angle-type) or other eye diseases (such as ocular hypertension).
Compared with Hawaii prescribers
Dr. Chu wrote 93 prescriptions for Dorzolamide-Timolol, about 89% as often as the typical Hawaii prescriber of it (105). Medicare paid $11.14 per fill, versus $19.12 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 temporarily relieve itching eyes caused by seasonal allergies.
Compared with Hawaii prescribers
Dr. Chu wrote 85 prescriptions for Ketorolac Tromethamine, about 1.3 times as often as the typical Hawaii prescriber of it (67). Medicare paid $15.49 per fill, versus $21.35 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 eye infections.
Compared with Hawaii prescribers
Dr. Chu wrote 75 prescriptions for Ofloxacin, about 1.4 times as often as the typical Hawaii prescriber of it (53). Medicare paid $12.68 per fill, versus $20.56 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
Cyclosporine eye drops are used to treat a certain type of dry eyes.
Compared with Hawaii prescribers
Dr. Chu wrote 47 prescriptions for Restasis, about 78% as often as the typical Hawaii prescriber of it (60). Medicare paid $1,390.85 per fill, versus $1,183.23 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
Netarsudil/latanoprost is used to treat high pressure inside the eye due to certain eye conditions (such as open-angle glaucoma, ocular hypertension).
Compared with Hawaii prescribers
Dr. Chu wrote 45 prescriptions for Rocklatan, about as often as the typical Hawaii prescriber of it (47). Medicare paid $459.62 per fill, versus $717.74 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
Latanoprostene bunod is used to treat high pressure inside the eye due to glaucoma (open-angle type) or other eye diseases (such as ocular hypertension).
Compared with Hawaii prescribers
Dr. Chu wrote 35 prescriptions for Vyzulta, about as often as the typical Hawaii prescriber of it (38). Medicare paid $342.81 per fill, versus $586.89 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
Bimatoprost is used to treat high pressure inside the eye due to glaucoma (open-angle type) or other eye diseases (such as ocular hypertension).
Compared with Hawaii prescribers
Dr. Chu wrote 28 prescriptions for Lumigan, about 74% as often as the typical Hawaii prescriber of it (38). Medicare paid $359.28 per fill, versus $689.73 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
Dorzolamide is used to treat high pressure inside the eye due to glaucoma (open angle-type) or other eye diseases (such as ocular hypertension).
Compared with Hawaii prescribers
Dr. Chu wrote 16 prescriptions for Dorzolamide Hcl, about 39% as often as the typical Hawaii prescriber of it (41). Medicare paid $12.66 per fill, versus $23.64 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 certain eye conditions due to inflammation or injury.
Compared with Hawaii prescribers
Dr. Chu wrote 15 prescriptions for Loteprednol Etabonate, about half as often as the typical Hawaii prescriber of it (28). Medicare paid $148.35 per fill, versus $195.11 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 open-angle glaucoma or high fluid pressure in the eye.
Compared with Hawaii prescribers
Dr. Chu wrote 13 prescriptions for Alphagan P, about 32% as often as the typical Hawaii prescriber of it (40). Medicare paid $326.61 per fill, versus $536.84 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 dry eye disease.
Compared with Hawaii prescribers
Dr. Chu wrote 13 prescriptions for Xiidra, about 39% as often as the typical Hawaii prescriber of it (33). Medicare paid $899.91 per fill, versus $1,193.99 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
Netarsudil is used to treat high pressure inside the eye due to certain eye conditions (such as open-angle glaucoma, ocular hypertension).
Compared with Hawaii prescribers
Dr. Chu wrote 11 prescriptions for Rhopressa, about 29% as often as the typical Hawaii prescriber of it (39). Medicare paid $399.13 per fill, versus $699.45 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. Chu’s prescriptions
What does Dr. Chu prescribe most?
In 2024 Medicare Part D data, Dr. Chu's most prescribed medications were Latanoprost (526), Timolol Maleate (234) and Prednisolone Acetate (114).
How does Dr. Chu's prescribing compare with other Hawaii prescribers?
Of the 16 medications with a state comparison, Dr. Chu prescribes 5 more often than the typical Hawaii prescriber, 5 about as often and 6 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Chu 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 Hawaii 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.
