Dr. Allison J. Chen, MD, MPH
Ophthalmology (Ophthalmology Physician)
- Medicare participating
At a glance
- Years since graduation
- 9
- In the NPI registry since
- 2017
- Medicare patients seen, 2024
- 175
Licensed in California since 2018, according to the Medical Board of California. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is
Education and training
- 2017Registered with an NPI (national billing number; not a license date)
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Ophthalmology Physician primary
TX license T2140 (first issued 2021; active) · CA license A159972 (first issued 2018; current)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Harris Health Houston, TX
- Baylor St Lukes Medical Center Houston, TX
Medical groups
- Baylor College of Medicine (1,240 clinicians)
- Baylor College of Medicine (809 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 175
- Services billed
- 393
- Patients’ average age
- 74
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 10-19 minutes | 24 | 20 |
| New patient office or other outpatient visit, 45-59 minutes | 14 | 14 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Prednisolone Acetate Other prescribers in Houston, TX | 77 |
| Polymyxin B Sul-Trimethoprim (polymyxin b sulf/trimethoprim) | 55 |
| Moxifloxacin (moxifloxacin hcl) Other prescribers in Houston, TX | 51 |
| Difluprednate | 46 |
| Doxycycline Hyclate Other prescribers in Houston, TX | 40 |
| Fluorometholone Other prescribers in Houston, TX | 26 |
| Latanoprost Other prescribers in Houston, TX | 23 |
| Bromfenac Sodium | 22 |
| Timolol Maleate Other prescribers in Houston, TX | 22 |
| Cyclosporine Other prescribers in Houston, TX | 20 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 5 companies reported 7 payments worth $695 in total to this clinician.
| Tarsus Pharmaceuticals, Inc. | $238 |
|---|---|
| Alcon Vision LLC | $165 |
| Sun Pharmaceutical Industries Inc. | $142 |
| Glaukos Corporation | $113 |
| Johnson & Johnson Surgical Vision, Inc. | $37.42 |
| Food and Beverage | $695 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.