Dr. Doris W. Chan, DO

Dr. Chan practices at Memorial Hermann Memorial City Medical Center in Houston, Texas, part of Memorial Hermann Health System.

Dr. Chan's NPI, 1124289053, was assigned on June 23, 2008. Dr. Chan graduated from Dr. Kiran C. Patel College of Osteopathic Medicine in 2008. Dr. Chan holds Texas license P8347.

Dr. Chan's primary practice is Memorial Hermann Memorial City Medical Center, at 921 Gessner, Houston, TX 77024 in Harris County. The practice phone is (713) 242-3000.

Dr. Chan's primary practice is Memorial Hermann Memorial City Medical Center in Houston, Texas, part of Memorial Hermann Health System. The medical group on file is ACS Primary Care Physicians Southwest, PA. Dmand AI also links Dr. Chan to 1 more medical group, named with a free account.

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chan practices. Vendor and product names are available with a free account.

Emergency medicine is Dr. Chan's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Chan is board certified in emergency medicine by the American Board of Emergency Medicine. Dr. Chan is licensed in Texas.

CMS data shows 553 Medicare services from Dr. Chan across 4 procedure codes in 2024, for 321 Medicare patients. Medicare paid $45,908 for them. Every service was in a facility, such as a hospital, rather than an office.

CMS counts 321 Medicare patients who saw Dr. Chan in 2024. The largest group is 75 to 84, with 113 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 15% are also on Medicaid. Their average risk score is 2.18, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Chan's median patient age at 57, with 55% women.

In 2024, Dr. Chan wrote 259 Medicare Part D claims for 171 patients. 97% of them were for generic drugs. CMS names the drug for 111 of them, across 6 drugs with 11 or more claims each, at $692 in total drug cost. In 2023, CMS named 82 claims across 4 drugs.

Dr. Chan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)

CMS Open Payments shows 37 general payments to Dr. Chan from 12 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Novartis Pharmaceuticals Corporation paid the most, $321.

Dr. Chan graduated from Dr. Kiran C. Patel College of Osteopathic Medicine in 2008. Dr. Chan is a member of AOA.

Dr. Chan is in network with 20 carriers, including United Healthcare, Aetna and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.