Rex Williams, M.D.
NPI 1821034596 · Pain Medicine (Anesthesiology) Physician · Starkville, MS
Enrolled with Medicare as Practitioner - Pain Management · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rex Williams, M.D. is a Pain Medicine (Anesthesiology) Physician provider in Starkville, MS (NPI 1821034596).
Provider details
- NPI number
- 1821034596
- Entity type
- Individual
- Primary specialty
- Pain Medicine (Anesthesiology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- ME92922 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,893 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Injection of Substance Into Lower Spine Canal Using Imaging Guidance62323 | 438 | $222 |
| Injection of Lower Or Sacral Spine Facet Joint Using Imaging Guidance, Single Level64493 | 273 | $219 |
| Injection of Lower Or Sacral Spine Facet Joint Using Imaging Guidance, Second Level64494 | 265 | $114 |
| Injection of Anesthetic Or Steroid Into Joint Between Lower Spine and Hip Bone Using Imaging Guidance27096 | 254 | $182 |
| Injection of Anesthetic And/Or Steroid Drug Into Sacral Spine Nerve Root Using Imaging Guidance, Single Level64483 | 206 | $234 |
| Destruction of Lower Or Sacral Spinal Facet Joint Nerves Using Imaging Guidance, Single Facet Joint |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamsulosin Hcl | 25 | — |
| Pravastatin Sodium | 24 | — |
| Donepezil Hcl | 24 | — |
| Potassium Chloride | 22 | — |
| Levothyroxine Sodium | 22 | — |
| Memantine Hcl | 20 | — |
| Gabapentin | 20 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,056 across 40 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 120 Stone Creek BlvdSuite 500Flowood, MS 39232-8205Phone: (601) 420-2040
- 400 Hospital RdStarkville, MS 39759-2163Phone: (662) 323-4230
Registry dates
- Enumerated
- 2006-06-21
- Last updated
- 2025-10-06
- Certified
- 2025-10-06
Frequently asked questions
- What is Rex Williams's NPI number?
- Rex Williams's National Provider Identifier (NPI) is 1821034596, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rex Williams's specialty?
- Rex Williams is listed in the NPPES registry with a primary specialty of Pain Medicine (Anesthesiology) Physician (Allopathic & Osteopathic Physicians).
- Where is Rex Williams located?
- Rex Williams's practice location on file with NPPES is 107 Doctors Park, Starkville, MS 39759-2174.
- What is Rex Williams's phone number?
- The practice phone number listed in the NPPES registry for Rex Williams is (662) 615-3751.
- Does Rex Williams accept Medicare?
- Rex Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rex Williams's NPI active?
- Yes — Rex Williams's NPI (1821034596) is active in the NPPES registry as of the last update on 2025-10-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.