John Ross Williams, M.D.
Neurological Surgery Physician · Houston, TX
John Ross Williams, M.D. is a neurological surgery physician with a practice address in Houston, Texas, and NPI 1336536200, issued on Apr 18, 2015. Check the license on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- John Ross Williams
- Credential
- M.D.
- Primary taxonomy
- Neurological Surgery Physician 207T00000X
- License number
- D94083 MD
Self-reported in NPPES; status is on the state search - Practice location
- 6400 Fannin St Ste 2150, Houston, TX 77030
- Phone
- (713) 486-8000
- Enumerated
- Apr 18, 2015
- Record last updated
- Jun 8, 2023
- Medicare enrollment
- Enrolled (PECOS I20230706002132); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest neurological surgery physician records → All 669 in Texas → Look up another NPI →
Also registered at 6400 Fannin St Ste 2150
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- John Caridi, MDNeurological Surgery Physician1447386560
- Glenda Medina, MSN-ACNPAcute Care Nurse Practitioner1790069748
- Nida PraslaAcute Care Nurse Practitioner1467105650
- Jessica Stark, MDNeurological Surgery Physician1174888341
Verify John Ross Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average neurological surgery physician in 2024
68 Medicare Part D claims for 24 beneficiaries, against an average of 172 among the 4,378 providers of this specialty who prescribed in Part D.
Most prescribed
- Gabapentin19 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): 74.4 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: $1,856.35
17 payments; by number, the most common kind was travel and lodging; the largest payer was Globus Medical, Inc. The 5,377 providers of this specialty with any payment received $14,925.58 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 one group practice
- UT PhysiciansHouston, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Ross Williams among 669 neurological surgery physician records in Texas
John Ross Williams, M.D. is one of 669 neurological surgery physician records with a practice address in Texas. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 81% of them.
- NPI issued2015 · 81% of these records are older, 17% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2015 · median 2004 among the 451 with a school on file
- Record last updated2023 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207T00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurological Surgery Physician providers in Texas
There are 669 neurological surgery physician records in Texas.
All 669 in Texas → Every provider in Houston → Neurological Surgery Physician nationwide →
The 8 neurological surgery physician records with the nearest ZIP codes
- Alfonso Aldama, MDHouston, TX 770301164415170
- David Cech, MDHouston, TX 770301548254667
- Bruce Ehni, MDHouston, TX 770301205820446
- Richard Harper, MDHouston, TX 770301174516116
- Paul Holman, M.D.Houston, TX 770301386698314
- Dong Kim, MDHouston, TX 770301043292550
- Thomas Luerssen, M.D.Houston, TX 770301245233808
- Jacques Morcos, M.D., F.R.C.S.Houston, TX 770301205899937
Common questions
What is John Ross Williams, M.D.'s NPI number?
John Ross Williams, M.D.'s National Provider Identifier (NPI) is 1336536200, issued on Apr 18, 2015. An NPI identifies a provider in billing; it is not a license.
Where is John Ross Williams, M.D. located?
The NPPES record lists a practice address at 6400 Fannin St Ste 2150, Houston, TX, 77030. Phone: (713) 486-8000. Providers update this record themselves, so call before visiting.
How can I verify John Ross Williams, M.D.'s license?
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 Ross Williams, M.D. prescribe under Medicare Part D?
In 2024, John Ross Williams, M.D. had 68 Medicare Part D claims for 24 beneficiaries; the average among neurological surgery physician prescribers was 172. Part D covers Medicare prescriptions only.
What is John Ross Williams, M.D.'s MIPS final score?
The 2023 MIPS final score is 74.4 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.