John Chancellor
Ophthalmology Physician · Houston, TX
John Chancellor is an ophthalmology physician with a practice address in Houston, Texas, and NPI 1710341763, issued on Apr 6, 2016. Check the license (Texas S5575, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- John Chancellor
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- S5575 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1977 Butler Blvd FL 2, Houston, TX 77030
- Phone
- (713) 798-6100
- Enumerated
- Apr 6, 2016
- Record last updated
- Dec 13, 2024
- Medicare enrollment
- Enrolled (PECOS I20200609001555); accepts Medicare assignment
- Medical or professional school
- University Of Massachusetts Medical School, 2016
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 1,514 in Texas → Look up another NPI →
Also registered at 1977 Butler Blvd FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Chancellor in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license S5575Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average ophthalmology physician in 2024
308 Medicare Part D claims for 89 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 50% of claims.
Most prescribed
- Ketorolac Tromethamine70 claims
- Prednisolone Acetate54 claims
- Difluprednate41 claims
- Moxifloxacin30 claims
- Atropine Sulfate25 claims
- Timolol Maleate12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 84.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $178.01
4 payments; by number, the most common kind was food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc. The 13,221 providers of this specialty with any payment received $4,535.02 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Baylor College OF MedicineHouston, TX
- Baylor College OF MedicineHouston, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Chancellor among 1,514 ophthalmology physician records in Texas
John Chancellor is one of 1,514 ophthalmology physician records with a practice address in Texas. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 83% of them.
- NPI issued2016 · 83% of these records are older, 15% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2016 · median 2003 among the 1,052 with a school on file
- Record last updated2024 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Texas
There are 1,514 ophthalmology physician records in Texas.
All 1,514 in Texas → Every provider in Houston → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Elizabeth Baze, M.D.Houston, TX 770301174512552
- Hilary Beaver, MDHouston, TX 770301417958869
- Yvonne Chu, M.D.Houston, TX 770301033108410
- David Coats, M.D.Houston, TX 770301982693388
- Jane Edmond, M.D.Houston, TX 770301023007432
- Judith Feigon, M.D.Houston, TX 770301871592063
- Rod Foroozan, M.D.Houston, TX 770301093704405
- Marshall Hamill, M.D.Houston, TX 770301972592384
Common questions
What is John Chancellor's NPI number?
John Chancellor's National Provider Identifier (NPI) is 1710341763, issued on Apr 6, 2016. An NPI identifies a provider in billing; it is not a license.
Where is John Chancellor located?
The NPPES record lists a practice address at 1977 Butler Blvd FL 2, Houston, TX, 77030. Phone: (713) 798-6100. Providers update this record themselves, so call before visiting.
How can I verify John Chancellor's license?
NPPES lists Texas license number S5575, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Chancellor prescribe under Medicare Part D?
In 2024, John Chancellor had 308 Medicare Part D claims for 89 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is John Chancellor's MIPS final score?
The 2023 MIPS final score is 84.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.