Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

JAMES L WARNOCK JR. M.D.
NPI 1356360119
Internal Medicine - Cardiovascular Disease in Jackson, MS

Q: What is James Warnock's NPI number?

The NPI number for James Warnock is 1356360119. It was assigned to this individual provider in the NPPES registry on July 19, 2006.

Q: What is James Warnock's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Q: When was this NPI record last updated?

The NPPES record for James Warnock was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 41 days 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 July 19, 2006PECOS EnrolledAccepts Medicare Assignment

75/100

CMS Quality Rating

501 MARSHALL ST, STE 104, JACKSON, MS 39202(601) 969-6404(601) 973-4541 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 29, 2026, Feb 15, 2018 (2 updates tracked since 2018).

On this page

About James L Warnock Jr. M.d. NPPES

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

JAMES L WARNOCK JR. M.D. (NPI 1356360119) is an individual cardiovascular disease provider in Jackson, Mississippi, licensed in Mississippi (13570) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with University Of Mississippi Med Center, and maintains a secondary practice location in Brandon.

NPPES Registry Identity

NPI1356360119

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameJAMES L WARNOCK JR.Credential: M.D.

Location Address501 MARSHALL ST, STE 104Jackson, MS 39202-1651

Mailing Address965 Ridge Lake Blvd Ste 103Memphis, TN 38120-9446 · (901) 227-3255 · Fax (901) 227-8591

Phone(601) 969-6404

Fax(601) 973-4541

Sole ProprietorNo

Medical School CMSUniversity Of Mississippi School Of MedicineGraduated 1992

Enumeration DateJuly 19, 2006

Last NPPES UpdateSeptember 29, 20262 updates tracked since enumeration

NPPES CertifiedSeptember 29, 2026

✔ NPI 1356360119 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in MS · 13570

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

501 MARSHALL ST, Jackson, MS 39202

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Secondary Practice Location 1

Location 1350 Crossgates BlvdBrandon, MS 39042-2601 · Phone (601) 825-2811 · Fax (601) 824-8198

Other Identifiers 1

Medicaid00125983MS

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

James L Warnock Jr. M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1254415698

PECOS Enrollment IDI20080708000362

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 James Warnock reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mississippi Baptist Medical Center, Inc.

0.1 mi

Neurology

1225 N STATE ST
Jackson, MS 39202

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

NPI 1467589556 (601) 968-1362

Medical Foundation Of Central Mississippi, Inc

0.2 mi

Vascular Surgery

501 MARSHALL ST STE 100
Jackson, MS 39202

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

NPI 1952557092 (601) 948-1416

Jackson Heart Clinic. P.A.

1.4 mi

Cardiovascular Disease

970 LAKELAND DR, SUITE 61
Jackson, MS 39216

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

NPI 1659318558 (601) 982-7850

Baptist Medical Center - Yazoo, Inc

39 mi

Critical Access

823 GRAND AVE
Yazoo City, MS 39194

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

NPI 1619918075 (662) 746-2261

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 33

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

613 services551 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

362 services346 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

320 services313 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

244 services76 patients

Evaluation of cardiac rhythm monitor system, remote up to 30 days 93298

This procedure involves remotely monitoring your heart rhythm for up to 30 days. A small device will record your heart's activity, which can be accessed by your healthcare team. This aids in diagnosing any irregularities or issues with your heart function.

106 services18 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician 93018

An exercise or drug-induced heart stress test with ECG is a procedure to assess how your heart functions under stress. It can involve exercising or medication to make your heart work harder while an ECG records its activity. A physician reviews the results.

96 services94 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician 93016

An exercise or drug-induced heart stress test with ECG involves monitoring your heart's activity while it's under stress, either from exercise or medication. A doctor supervises the entire procedure to ensure safety and accuracy in results. This test helps detect heart problems.

89 services87 patients

Nuclear medicine studies of blood flow in heart muscle at rest and with stress with concurrent ct scan 78431

This is a diagnostic test where a tiny amount of radioactive material is used to examine your heart's blood flow at rest & during stress, alongside a CT scan for detailed images. It helps identify any heart-related issues like blockages or damage.

77 services77 patients

Ct scan of heart structure with contrast 75572

A CT scan of the heart with contrast is a non-invasive test. A dye is injected into your veins, which helps to highlight heart structures in the images. The CT scanner uses X-rays to create detailed pictures of your heart, aiding in diagnosis.

60 services58 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.

53 services53 patients

Ultrasound of both sides of head and neck blood flow 93880

An ultrasound of the head and neck blood flow is a safe, non-invasive procedure that uses sound waves to create images of blood vessels. It helps detect abnormalities like blockages or clots, ensuring optimal blood flow.

47 services43 patients

Ultrasound of heart with color-depicted blood flow, rate and valve function 93325

An ultrasound of the heart, also known as an echocardiogram, uses sound waves to create pictures of your heart. It shows the structure, movement, and blood flow within your heart. This helps assess the heart's health and function, including the valves and rate.

46 services42 patients

Ct scan of blood vessels and grafts of heart with contrast 75574

A CT scan of the heart's blood vessels and grafts with contrast is a diagnostic test. A special dye (contrast) is injected into your veins, which helps create clear images of your heart's vessels and grafts. This helps doctors detect blockages or other abnormalities.

39 services39 patients

Complete ultrasound study of arm and leg arteries 93923

This procedure involves using sound waves to produce images of your arm and leg arteries. It helps identify blockages or abnormalities that could lead to conditions like stroke or peripheral artery disease. It's non-invasive and painless.

37 services37 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

31 services30 patients

Electrocardiogram (ecg) 2-day continuous with review by health care professional 93227

An Electrocardiogram (ECG) is a test that checks your heart's activity. The 2-day continuous ECG records your heart's rhythm non-stop for 48 hours. It helps to detect irregularities that may not occur during a shorter test. A healthcare professional will review the results to identify any issues.

30 services30 patients

Ultrasound of heart blood flow, valves and chambers, follow-up 93321

This procedure, an echocardiogram, uses sound waves to create images of your heart. It aids in assessing your heart's blood flow, chambers, and valves. It's a follow-up procedure, ensuring that your heart is functioning properly post-treatment.

30 services28 patients

Heart rhythm review, and interpretation of continous external ekg over more than 48 hours up to 7 days 93244

A heart rhythm review involves monitoring your heart's electrical activity for more than 48 hours up to 7 days. Using a device called an external EKG, doctors can track your heartbeats to detect irregularities and help diagnose heart conditions.

28 services28 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

27 services27 patients

Ultrasound of heart with probe in esophagus, with report 93312

This procedure, called a transesophageal echocardiogram, uses a small probe passed into your esophagus to capture detailed images of your heart. The report provides information about your heart's structure and function.

26 services25 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

26 services26 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

25 services25 patients

Ultrasound of heart, follow-up 93308

A follow-up ultrasound of the heart, also known as an echocardiogram, is a non-invasive test that uses sound waves to create images of your heart. It helps doctors monitor your heart's function and structures after initial assessment or treatment.

23 services20 patients

External shock to heart to regulate heart beat 92960

This procedure, known as cardioversion, uses an external electrical shock to restore your heart's normal rhythm. It's typically performed when irregular heartbeats, or arrhythmias, are causing severe symptoms and aren't responding to medications.

20 services18 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

19 services18 patients

3d radiographic procedure 76376

A 3D radiographic procedure is a non-invasive imaging test that helps doctors visualize the internal structures of your body in three dimensions. This advanced technology provides detailed images, aiding in accurate diagnosis and treatment planning. It involves exposure to minimal radiation.

17 services16 patients

Heart rhythm review and interpretation of continous external ekg over 8-15 days 93248

This service involves wearing a device for 8-15 days that continuously records your heart's electrical activity. It helps in identifying irregular heart rhythms. The recorded data is then reviewed and interpreted by a healthcare professional for any abnormalities.

17 services17 patients

Nuclear medicine studies of heart muscle at rest and with stress and spect 78452

Nuclear medicine studies of the heart involve two parts: rest and stress. During rest, images are taken of your heart at ease. During stress, images are taken after exercise or medication-induced stress. SPECT is a special imaging technique providing 3D pictures of your heart, helping identify any issues.

15 services15 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

15 services15 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

15 services12 patients

Ultrasound of heart blood flow, valves and chambers 93320

An ultrasound of your heart, also known as an echocardiogram, is a test that uses sound waves to create detailed images of your heart. It helps doctors check the health of your heart's chambers, valves, and blood flow.

14 services13 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

13 services11 patients

Nuclear medicine study, 1 area 78800

A nuclear medicine study is a diagnostic procedure that uses a small amount of radioactive substance to examine the function of a specific area in your body. This safe, non-invasive test helps doctors detect diseases, assess your condition, and plan the best treatment.

12 services12 patients

Hospital Affiliations CMS Care Compare 5

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

University Of Mississippi Med Center

Acute Care Hospitals · Jackson, MS

2/5 CMS rating

OwnershipGovernment - State

CMS Certification Number250001

Location2500 N State StJackson, MS 39216 · Hinds County

Emergency services Birthing friendly

Mississippi Baptist Medical Center

Acute Care Hospitals · Jackson, MS

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number250102

Location1225 N State StJackson, MS 39202 · Hinds County

Emergency services Birthing friendly

Tyler Holmes Memorial Hospital Cah

Critical Access Hospitals · Winona, MS

OwnershipGovernment - Local

CMS Certification Number251312

Location409 Tyler Holmes DriveWinona, MS 38967 · Montgomery County

Emergency services

Baptist Medical Center-Yazoo

Critical Access Hospitals · Yazoo City, MS

OwnershipVoluntary non-profit - Private

CMS Certification Number251313

Location823 Grand AvenueYazoo City, MS 39194 · Yazoo County

Emergency services

Copiah County Medical Center

Critical Access Hospitals · Hazlehurst, MS

OwnershipGovernment - Local

CMS Certification Number251327

Location21790 Highway 28Hazlehurst, MS 39083 · Copiah County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 39202 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$120.41 typical visit price

range $51.65 – $159.18

Typical copayment $30.10 (range $12.91 – $39.79)

Most-billed visit code 99204

Established Patient

$64.96 typical visit price

range $16.15 – $129.61

Typical copayment $16.24 (range $4.03 – $32.40)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

75/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

Other Providers at the Same Location NPPES 20

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

SUSAN B PATTERSON NP-C

Nurse Practitioner

501 MARSHALL ST, STE 104
JACKSON, MS 39202

Hinds County (601) 969-6404

THE WOMANS CLINIC OF MS PLLC

Obstetrics & Gynecology

501 MARSHALL ST, SUITE 400
JACKSON, MS 39202

Hinds County (601) 354-0869

DR. VIRGINIA A JONES MD

Obstetrics & Gynecology

501 MARSHALL ST, STE 400
JACKSON, MS 39202

Hinds County (601) 354-0869

DR. RICKY GORDON RUSSELL MD

Ophthalmology

501 MARSHALL ST, SUITE 603
JACKSON, MS 39202

Hinds County (601) 985-9120

PREMIER MEDICAL MANAGEMENT OF MISSISSIPPI, INC

Clinic/Center (Endoscopy)

501 MARSHALL ST, SUITE 201
JACKSON, MS 39202

Hinds County (601) 352-2273

BARRIE E ADEN AU.D.

Audiologist

501 MARSHALL ST, SUITE 602
JACKSON, MS 39202

Hinds County (601) 969-1910

MISS MARIE JAQUELINE WILLIAMS NP

Nurse Practitioner (Obstetrics & Gynecology)

501 MARSHALL ST, SUITE 600
JACKSON, MS 39202

Hinds County (601) 948-6540

TONYA W SWEENEY NP-C

Nurse Practitioner (Acute Care)

501 MARSHALL ST, STE 104
JACKSON, MS 39202

Hinds County (601) 969-6404

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is James Warnock's NPI number?

The NPI number for James Warnock is 1356360119. It was assigned to this individual provider in the NPPES registry on July 19, 2006.

Where is James Warnock located?

James Warnock practices at 501 Marshall St Ste 104, Jackson, MS 39202. The listed phone number is (601) 969-6404.

What is James Warnock's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is James Warnock enrolled in Medicare?

Yes. James Warnock is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for James Warnock's services?

According to the CMS Revalidation Reassignment List (October 2026 release), James Warnock reassigns Medicare benefits to 4 organizations: Mississippi Baptist Medical Center, Inc. (Jackson, MS), Medical Foundation Of Central Mississippi, Inc (Jackson, MS), Jackson Heart Clinic. P.A. (Jackson, MS) and Baptist Medical Center - Yazoo, Inc (Yazoo City, MS). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for James Warnock's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does James Warnock accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 3 other insurers list James Warnock as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is James Warnock affiliated with any hospitals?

According to CMS data, James Warnock is affiliated with University Of Mississippi Med Center, Mississippi Baptist Medical Center, Tyler Holmes Memorial Hospital Cah, Baptist Medical Center-Yazoo and Copiah County Medical Center.

When was this NPI record last updated?

The NPPES record for James Warnock was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 41 days 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.