Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

John Chancellor

Individual provider Ophthalmology Physician · NPI 1710341763

John Chancellor practises Ophthalmology in Houston, Texas. Graduated from University of Massachusetts Medical School in 2016, 10 years ago. Practices with Baylor College of Medicine, a 798-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
10
Trained at
University of Massachusetts Medical School
Licensed in
TX
In the registry since
2016
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Practice location Address checks out

1977 Butler Blvd Fl 2
Houston, TX 77030-4101
Phone: (713) 798-6100
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 4301 W Markham St # 523, Little Rock, AR 72205-7101 — (501) 686-5356
  • 1504 Taub Loop Fl 2, Houston, TX 77030-1608 — (713) 526-4243

Specialties & licences

Ophthalmology Physician (primary) Taxonomy 207W00000X · Licence S5575 (TX)

Record details

NPI number1710341763
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedApril 6, 2016
Last updated in NPPESDecember 13, 2024
Certification dateDecember 13, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPHTHALMOLOGY
Medical schoolUNIVERSITY OF MASSACHUSETTS MEDICAL SCHOOL
Graduated 2016 (10 years in practice)
Group practice Baylor College Of Medicine — 798 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients563
Services billed 13,668 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $135 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Baylor College of Medicine

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 798 clinicians in the practice; 12 are shown here.

Other providers in Houston