REX B WILLIAMS M.D.
NPI 1821034596
Anesthesiology - Pain Medicine in Starkville, MS

Q: What is Rex Williams's NPI number?

The NPI number for Rex Williams is 1821034596. It was assigned to this individual provider in the NPPES registry on June 21, 2006.

Q: What is Rex Williams's specialty?

The primary specialty registered for this NPI is Anesthesiology, specializing in Pain Medicine, with taxonomy code 207LP2900X.

Q: When was this NPI record last updated?

The NPPES record for Rex Williams was last updated on October 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 21, 2006PECOS Enrolled

107 DOCTORS PARK, STARKVILLE, MS 39759(662) 615-3751(662) 615-3754 Get Directions Write a Review

NPPES record last updated: October 6, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 6, 2025, Aug 9, 2020, Dec 12, 2019 (3 updates tracked since 2019).

On this page

About Rex B Williams M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

REX B WILLIAMS M.D. (NPI 1821034596) is an individual pain medicine provider in Starkville, Mississippi, licensed in Mississippi (19128) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Och Regional Medical Center, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1821034596

Entity TypeIndividualMale

Primary Taxonomy207LP2900X

Provider Legal NameREX B WILLIAMSCredential: M.D.

Location Address107 DOCTORS PARKStarkville, MS 39759-2174

Mailing Address350 N Humphreys Blvd Ste 201Memphis, TN 38120-2177 · (901) 226-4003 · Fax (901) 227-8591

Phone(662) 615-3751

Fax(662) 615-3754

Sole ProprietorNo

Medical School CMSMississippi Medical CollegeGraduated 2001

Enumeration DateJune 21, 2006

Last NPPES UpdateOctober 6, 20253 updates tracked since enumeration

NPPES CertifiedOctober 6, 2025

✔ NPI 1821034596 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiology · Pain MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207LP2900X

Licenses✔ Licensed in MS · 19128✔ Licensed in FL · ME92922

Definition

An anesthesiologist who provides a high level of care, either as a primary physician or consultant, for patients experiencing problems with acute, chronic and/or cancer pain in both hospital and ambulatory settings. Patient care needs are also coordinated with other specialists.

107 DOCTORS PARK, Starkville, MS 39759

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Secondary Practice Locations 2

Location 1120 Stone Creek Blvd, Suite 500Flowood, MS 39232-8205 · Phone (601) 420-2040

Location 2400 Hospital RDStarkville, MS 39759-2163 · Phone (662) 323-4230

Other Identifiers 1

Other302G708049MS · Medicare Ptan

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Alabama, Oscar Health Plan, Inc., Oscar Insurance Company.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Rex B Williams M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2365447737

PECOS Enrollment IDI20060919000430, I20250210000247

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Rex Williams reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Och Center For Pain Management

Same address

Pain

107 DOCTORS PARK
Starkville, MS 39759

Reassigned Medicare billing, Mississippi enrollment
5 clinicians in this Medicare group

NPI 1902965866 (662) 615-3751

Och Professional Services

0.2 mi

Multi-Specialty

400 HOSPITAL RD
Starkville, MS 39759

Reassigned Medicare billing, Mississippi enrollment
34 clinicians in this Medicare group

NPI 1225202666 (662) 615-2817

Ms Pain Institute Oxford PLLC

73 mi

Pain Medicine

2215 JEFFERSON DAVIS DR
Oxford, MS 38655

Reassigned Medicare billing, Mississippi enrollment
8 clinicians in this Medicare group

NPI 1518703024 (601) 898-7530

Strategic Solutions-Panola Medical Center LLC

85 mi

Rural Health

255 MEDICAL CENTER DR
Batesville, MS 38606

Reassigned Medicare billing, Mississippi enrollment
Medicare enrollment name: Progressive Medical Management Of Batesville LLC
97 clinicians in this Medicare group

NPI 1700349222 (662) 563-2163

Russellville Hospital Inc

94 mi

Rural Health

13150 HIGHWAY 43 STE 10
Russellville, AL 35653

Reassigned Medicare billing, Alabama enrollment
138 clinicians in this Medicare group

NPI 1508491093 (256) 332-5901

South Sunflower County Hospital

106 mi

Rural Health

122 E BAKER ST
Indianola, MS 38751

Reassigned Medicare billing, Mississippi enrollment
89 clinicians in this Medicare group

NPI 1245248699 (662) 887-2212

Baptist Memorial Medical Group Inc

121 mi

Internal Medicine

8970 WINCHESTER RD
Memphis, TN 38125

Reassigned Medicare billing, Mississippi enrollment
494 clinicians in this Medicare group

NPI 1306089206 (901) 227-4068

Tallahassee Neurology Specialists, P.L.

338 mi

Multi-Specialty

1401 OVEN PARK DR, SUITE 201
Tallahassee, FL 32308

Reassigned Medicare billing, Georgia enrollment
Medicare enrollment name: Tallahassee Neurology Specialists Pl
10 clinicians in this Medicare group

NPI 1326357005 (850) 765-8623

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 34

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, dexamethasone sodium phosphate, 1 mg J1100

Dexamethasone sodium phosphate is a medication given via injection. It is a type of steroid that helps reduce inflammation and immune responses. It can be used to treat a variety of conditions, such as allergies, skin conditions, arthritis, and more.

5,910 services546 patients

Injection, propofol, 10 mg J2704

Propofol is a medication given via injection to help you relax or sleep during surgery or other medical procedures. The 10 mg dosage refers to the amount of medication you'll receive. It's administered by a healthcare professional and monitored closely for safety.

5,847 services277 patients

Injection, midazolam hydrochloride, per 1 mg J2250

Midazolam hydrochloride is a medication injected to help you relax or sleep before surgery or certain medical procedures. It works by calming the brain and nerves. It's given in small doses, measured in milligrams (mg).

3,711 services443 patients

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

2,588 services480 patients

Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml Q9967

Low osmolar contrast material with 300-399 mg/ml iodine concentration is a diagnostic tool used in imaging procedures. It helps to enhance the visibility of specific areas in the body, aiding in accurate diagnosis. It's safe and generally well-tolerated by patients.

1,328 services586 patients

Injection of substance into lower spine canal using imaging guidance 62323

This procedure involves injecting a substance into your lower spine canal, guided by real-time images. It's done to diagnose or treat various conditions. You may feel slight discomfort, but it's generally safe and can provide valuable information for your treatment plan.

438 services302 patients

Injection of lower or sacral spine facet joint using imaging guidance, single level 64493

This procedure involves injecting medication into the facet joint in your lower back or sacral spine. It's done under imaging guidance to ensure accuracy. The aim is to alleviate pain and inflammation. It's a safe, often effective method for managing spinal discomfort.

273 services177 patients

Injection of lower or sacral spine facet joint using imaging guidance, second level 64494

This procedure involves injecting medication into the facet joints of your lower or sacral spine to manage pain. Imaging guidance ensures accurate placement. It's the second level, meaning it's done on two different joint levels.

265 services174 patients

Injection of anesthetic or steroid into joint between lower spine and hip bone using imaging guidance 27096

This procedure involves injecting medicine into the joint where your lower spine meets your hip bone. Using special imaging technology, the doctor ensures the medicine is delivered accurately. This can help reduce pain and inflammation in that area.

254 services202 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level 64483

This procedure involves injecting a mix of numbing and anti-inflammatory medication into a specific nerve root in the lower back. It helps manage pain and reduce inflammation. The process is guided by imaging technology for precision.

206 services148 patients

Destruction of lower or sacral spinal facet joint nerves using imaging guidance, single facet joint 64635

This procedure involves using imaging guidance to accurately target and destroy nerves in the lower or sacral spinal facet joint. It's done to relieve chronic back pain. The process is safe and usually effective.

184 services169 patients

Destruction of lower or sacral spinal facet joint nerves using imaging guidance, each additional facet joint 64636

This procedure involves using imaging technology to locate and treat nerves in your lower spine or sacral area that may be causing pain. Each additional facet joint refers to treating more than one spinal nerve. It's a non-invasive way to manage chronic back pain.

182 services168 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level 64484

This procedure involves injecting an anesthetic or steroid drug into the sacral spine nerve root. It's done under imaging guidance to ensure accuracy. The process can be repeated for each additional level of the spine to help manage pain or inflammation.

150 services111 patients

Injection of upper or middle spine facet joint using imaging guidance, single level 64490

This procedure involves injecting medication into a joint in your upper or middle spine. It's performed under imaging guidance for precision. The aim is to reduce inflammation and pain. It's a single-level process, meaning one joint is treated at a time.

121 services72 patients

Injection of upper or middle spine facet joint using imaging guidance, second level 64491

This procedure involves injecting medication into the upper or middle spine facet joint, a small joint in your back. This is done under imaging guidance for precision. It's a second-level procedure, meaning it's done on two separate joints. It can help reduce pain and inflammation.

117 services71 patients

Injection of substance into middle or upper spine canal using imaging guidance 62321

This procedure involves injecting a substance into your middle or upper spine canal. It's performed under imaging guidance to ensure accuracy. The substance can help diagnose or treat various conditions, providing relief from symptoms.

76 services64 patients

Destruction of nerves supplying joint between spine and pelvis using imaging guidance 64625

This procedure involves the use of imaging technology to accurately locate and destroy specific nerves in the joint between your spine and pelvis. The goal is to reduce pain by interrupting the nerve signals responsible for your discomfort.

72 services61 patients

Destruction of upper or middle spinal facet joint nerves using imaging guidance, single facet joint 64633

This procedure involves the use of imaging technology to guide a needle to the nerves of a single facet joint in the upper or middle spine. The nerves are then treated to alleviate pain and improve mobility.

70 services62 patients

Destruction of upper or middle spinal facet joint nerves using imaging guidance, each additional facet joint 64634

This procedure involves the use of imaging technology to accurately target and destroy nerves in the upper or middle spinal facet joints, which may be causing pain. Each additional facet joint treated follows the same process.

69 services61 patients

Injection of cell or tissue-based material into spinal disc of lower back accessed through skin, first level 0627T

This procedure involves injecting cell or tissue-based material into a spinal disc in the lower back. It's done through the skin and aims to treat back pain or disc problems. It's a minimally invasive procedure, often performed under local anesthesia.

60 services36 patients

Fluoroscopic guidance for needle placement 77002

Fluoroscopic guidance for needle placement is a medical procedure that uses a special X-ray technology to help accurately place a needle in the body. It's often used in biopsies, injections or other treatments to ensure precision and safety.

43 services40 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level 64483

41 services35 patients

Aspiration and/or injection of fluid from large joint 20610

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

35 services31 patients

Injection of anesthetic agent and/or steroid into knee nerve branch using imaging guidance 64454

This procedure involves injecting anesthetic and/or steroid medication into a knee nerve branch. Imaging technology is used to ensure accurate placement of the needle. This can help reduce pain and inflammation in the knee area.

32 services25 patients

Fluoroscopic guidance for needle placement 77002

29 services23 patients

Aspiration and/or injection of fluid from large joint 20610

27 services22 patients

Injection of anesthetic agent and/or steroid into suprascapular shoulder nerve 64418

This is a procedure where a medicine, often a mix of a numbing agent and a steroid, is injected into the suprascapular nerve in your shoulder. It's usually done to help manage shoulder pain, decrease inflammation, and improve mobility.

25 services20 patients

Injection of substance into lower spine canal using imaging guidance 62323

23 services21 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

21 services21 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level 64484

20 services17 patients

Testing for presence of drug, read by direct observation 80305

Testing for the presence of drugs involves collecting a sample, usually urine, which is then analyzed for specific substances. The process is monitored directly to ensure accuracy and integrity. This test helps to confirm if drugs are present in your system.

17 services17 patients

Injection of anesthetic or steroid into joint between lower spine and hip bone using imaging guidance 27096

16 services14 patients

Destruction of nerve branches of knee using imaging guidance 64624

This procedure involves the use of imaging technology to accurately locate and destroy specific nerve branches in the knee. This can help reduce chronic knee pain. The procedure is minimally invasive and usually performed under local anesthesia.

16 services14 patients

Injection of trigger points, 3 or more muscles 20553

Trigger point injection therapy involves injecting medication into specific areas of your muscles, known as trigger points. These are areas that produce pain and discomfort. If you have three or more muscles affected, each will be treated individually.

11 services11 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Och Regional Medical Center

Acute Care Hospitals · Starkville, MS

2/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number250050

Location400 Hospital Road /Mail PO Box 1506Starkville, MS 39759 · Oktibbeha County

Emergency services Birthing friendly

Other Providers at the Same Location NPPES 9

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. DOUGLAS TUCKER M.D.

Anesthesiology