NPPES file of Aug 9, 2026

Rex B. Williams, M.D.

Pain Medicine (Anesthesiology) Physician · Starkville, MS

Rex B. Williams, M.D. is a pain medicine (anesthesiology) physician with a practice address in Starkville, Mississippi, and NPI 1821034596, issued on Jun 21, 2006. Check the license (Mississippi 19128, as entered in NPPES) on the Mississippi State Board of Medical Licensure; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1821034596
Name
Rex B. Williams
Credential
M.D.
Primary taxonomy
Pain Medicine (Anesthesiology) Physician 207LP2900X
License numbers
19128 MS
ME92922 FL
Self-reported in NPPES; status is on the state search
Practice location
107 Doctors Park, Starkville, MS 39759
Phone
(662) 615-3751
Enumerated
Jun 21, 2006
Record last updated
Oct 6, 2025
Fax
(662) 615-3754
Medicare enrollment
Enrolled (PECOS I20250210000247); may accept Medicare assignment
Medical or professional school
Mississippi Medical College, 2001
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest pain medicine (anesthesiology) physician records → All 41 in Mississippi → Look up another NPI →

Also registered at 107 Doctors Park

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Dana Brooks, FNP-CFamily Nurse Practitioner1306243936
  2. Tommy CobbObstetrics & Gynecology Physician1346321189
  3. Miriam CochranObstetrics & Gynecology Physician1235210063
  4. Jan FurnissObstetrics & Gynecology Physician1639250459
  5. Chester LottObstetrics & Gynecology Physician1114008950
  6. Lana Lyle, FNPFamily Nurse Practitioner1568896165

Verify Rex B. Williams in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMississippi State Board of Medical Licensure
    Search for license 19128    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Mississippi license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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62% fewer Medicare Part D claims than the average pain medicine (anesthesiology) physician in 2024

664 Medicare Part D claims for 81 beneficiaries, against an average of 1,750 among the 2,982 providers of this specialty who prescribed in Part D. 48 claims were for opioids.

  1. Rex Williams664
  2. Specialty average1,750

Most prescribed

  1. Tamsulosin Hcl25 claims
  2. Donepezil Hcl24 claims
  3. Pravastatin Sodium24 claims
  4. Levothyroxine Sodium22 claims
  5. Potassium Chloride22 claims
  6. Gabapentin20 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.

Industry payments in 2024: $2,055.75

40 payments; by number, the most common kind was food and beverage; the largest payer was Spinal Simplicity, LLC. The 2,789 providers of this specialty with any payment received $3,225.41 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Rex Williams$2,055.75
  2. Specialty average$3,225.41

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through 3 group practices

  1. MS Pain Institute Oxford PLLCOxford, MS
  2. Och Professional ServicesStarkville, MS
  3. Russellville Hospital Inc.Russellville, AL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Rex B. Williams among 41 pain medicine (anesthesiology) physician records in Mississippi

Rex B. Williams, M.D. is one of 41 pain medicine (anesthesiology) physician records with a practice address in Mississippi. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.

  • NPI issued2006 · 15% of these records are older, 44% newer
  • In a Medicare fileYes · 85% of these records are
  • In the CMS Doctors and Clinicians fileYes · 73% of these records are
  • Graduated2001 · median 2001 among the 30 with a school on file
  • Record last updated2025 · 49% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207LP2900X and a Mississippi practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pain Medicine (Anesthesiology) Physician providers in Mississippi

There are 41 pain medicine (anesthesiology) physician records in Mississippi.

All 41 in Mississippi → Every provider in Starkville → Pain Medicine (Anesthesiology) Physician nationwide →

The 8 pain medicine (anesthesiology) physician records with the nearest ZIP codes

  1. Jackson Walters, MDColumbus, MS 397051124274733
  2. Stuart Gross, MDMcComb, MS 396481336119577
  3. Robin Nations, MDBrookhaven, MS 396011417932690
  4. Brian Tsang, M.D.Biloxi, MS 395311194819045
  5. Neilson Tran, MDBay St Louis, MS 395201093132938
  6. Brian Dix, D.O.Gulfport, MS 395031932215464
  7. Kent Overmyer, M.D.Gulfport, MS 395031821104365
  8. Dustin Duracher, M.D.Gulfport, MS 395011871021212

Common questions

What is Rex B. Williams, M.D.'s NPI number?

Rex B. Williams, M.D.'s National Provider Identifier (NPI) is 1821034596, issued on Jun 21, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Rex B. Williams, M.D. located?

The NPPES record lists a practice address at 107 Doctors Park, Starkville, MS, 39759. Phone: (662) 615-3751. Providers update this record themselves, so call before visiting.

How can I verify Rex B. Williams, M.D.'s license?

NPPES lists Mississippi license number 19128, as entered by the provider. Search the Mississippi State Board of Medical Licensure at https://www.msbml.ms.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Rex B. Williams, M.D. prescribe under Medicare Part D?

In 2024, Rex B. Williams, M.D. had 664 Medicare Part D claims for 81 beneficiaries; the average among pain medicine (anesthesiology) physician prescribers was 1,750. Part D covers Medicare prescriptions only.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.