REX B WILLIAMS (M.D.) – Pain Medicine (Anesthesiology) Physician, NPI 1821034596
Pain Medicine (Anesthesiology) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
69 PAIN MANAGEMENT in MS
Provider Addresses for REX B WILLIAMS (M.D.)
350 N HUMPHREYS BLVD STE 201
MEMPHIS, TN 381202177
Phone: (901) 226-4003
Fax: (901) 227-8591
Type: Mailing
120 Stone Creek Blvd
Suite 500
Flowood, MS 392328205
Phone: (601) 420-2040
Type: Location
400 Hospital RD
Starkville, MS 397592163
Phone: (662) 323-4230
Type: Location
1401, Oven Park Drive, Tallahassee, Leon County, Florida, 32308, United States
STE 201
TALLAHASSEE, FL 323087958
Phone: (850) 765-8623
Type: Mailing
Stone Creek Boulevard, Flowood, Rankin County, Mississippi, 39232, United States
SUITE 500
FLOWOOD, MS 392328205
Phone: (601) 420-2040
Type: Location
107 DOCTORS PARK
STARKVILLE, MS 397592174
Phone: (662) 615-3751
Fax: (662) 615-3754
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 59 Open Payments records for all available years, with a total value of $2,329.
Total Amount is formed as General ($2,329) + Research ($0) + Ownership ($0) = $2,329.
Last reported payment date: 2024-12-04 • Largest payer in this snapshot: Spinal Simplicity, LLC ($1,258).
Total Amount
$2,329
General + Research + Ownership
Payments
59
Total payment records
General Amount
$2,329
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-04
Latest reported date
Top Companies
Largest payers in this snapshot
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2025-02-10
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 3 Medicare enrollment records; no due dates published yet.
Enrollment records
3
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20060919000430 | I | Pain Management | MS | TBD |
| I20200813003479 | I | Interventional Pain Management | GA | TBD |
| I20250210000247 | I | Pain Management | AL | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| J2704 | Injection, propofol, 10 mg | 17,755 | 122 | $0 |
| J1100 | Injection, dexamethasone sodium phosphate, 1 mg | 4,418 | 362 | $0 |
| J2250 | Injection, midazolam hydrochloride, per 1 mg | 2,783 | 366 | $0 |
| Q9967 | Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml | 647 | 312 | $0 |
| J3301 | Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 614 | 246 | $0 |
Insurance plans in this area (ZIP 38120)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| PAIN MANAGEMENT | MS | 20610 | Aspiration and/or injection of large joint or joint capsule | 58 | 47 |
| PAIN MANAGEMENT | MS | 62311 | Injections of substances into lower or sacral spine | 114 | 83 |
| PAIN MANAGEMENT | MS | 64493 | Injections of lower or sacral spine facet joint using imaging guidance | 102 | 67 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| A N E S T H E S I O L O G Y | PA | |
| A N E S T H E S I O L O G Y | MS | |
| Internal Medicine, Pulmonary Disease | MS | |
| General Surgery | MS | |
| Internal Medicine, Cardiovascular Disease (Cardiology) | MS | |
| Certified Registered Nurse Anesthetist (Crna) | MS | |
| - | MS | |
| Certified Registered Nurse Anesthetist (Crna) | MS | |
| Cardiovascular Disease (Cardiology) | MS | |
| - | MS |
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