MR. MARSHALL K. WALKER M.D.
NPI 1619295441
Radiology - Vascular & Interventional Radiology in Mobile, AL

Q: What is Marshall Walker's NPI number?

The NPI number for Marshall Walker is 1619295441. It was assigned to this individual provider in the NPPES registry on May 4, 2010. The provider is also known as Mr. Marshall Kingman Walker M.D..

Q: What is Marshall Walker's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Vascular & Interventional Radiology, with taxonomy code 2085R0204X.

Q: When was this NPI record last updated?

The NPPES record for Marshall Walker was last updated on November 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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 May 04, 2010PECOS EnrolledAccepts Medicare Assignment

96.56/100

CMS Quality Rating

3610 SPRINGHILL MEMORIAL DR. N., MOBILE, AL 36608(251) 410-3600(251) 410-3743 Get Directions Write a Review

NPPES record last updated: November 21, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 21, 2025, Jan 2, 2025, May 15, 2024 and 3 more (6 updates tracked since 2016).

On this page

About Mr. Marshall K. Walker M.d. NPPES

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

MR. MARSHALL K. WALKER M.D. (NPI 1619295441) is an individual vascular & interventional radiology provider in Mobile, Alabama, licensed in Alabama (MD.31143) and active in the NPI registry since May 2010. He is enrolled in Medicare PECOS, maintains a secondary practice location in Marianna, and is a graduate of Tulane University School Of Medicine (2010).

NPPES Registry Identity

NPI1619295441

Entity TypeIndividualMale

Primary Taxonomy2085R0204X

Provider Legal NameMR. MARSHALL K. WALKERCredential: M.D.

Location Address3610 SPRINGHILL MEMORIAL DR. N.Mobile, AL 36608-1162

Mailing Address3610 Springhill Memorial Dr NMobile, AL 36608-1162 · (251) 410-3600 · Fax (251) 410-3700

Phone(251) 410-3600

Fax(251) 410-3743

Sole ProprietorYes

Medical School CMSTulane University School Of MedicineGraduated 2010

Enumeration DateMay 4, 2010

Last NPPES UpdateNovember 21, 20256 updates tracked since enumeration

NPPES CertifiedNovember 21, 2025

✔ NPI 1619295441 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyRadiology · Vascular & Interventional RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0204X

Licenses✔ Licensed in AL · MD.31143✔ Licensed in FL · ME170526✔ Licensed in AL · 31143✔ Licensed in MS · 24945✔ Licensed in KY · C3071

Definition

A radiologist who diagnoses and treats diseases by various radiologic imaging modalities. These include fluoroscopy, digital radiography, computed tomography, sonography and magnetic resonance imaging.

Also ListedRadiology · Diagnostic RadiologyTaxonomy 2085R0202X · License C3071 (KY), 24945 (MS)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

3610 SPRINGHILL MEMORIAL DR. N., Mobile, AL 36608

Open in Google Maps ↗

Other Names 1

Other Name (5)Mr. Marshall Kingman Walker M.d.

Secondary Practice Location 1

Location 14250 Hospital DrMarianna, FL 32446-1917 · Phone (850) 526-2200 · Fax (850) 718-2844

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Alabama, Blue Cross and Blue Shield of Texas, Blue Cross Blue Shield of Arizona 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

Mr. Marshall K. Walker 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 ID6002088689

PECOS Enrollment IDI20111003000606, I20250108001406

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 Marshall Walker reassigns Medicare billing to 26 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

American Family Care LLC

0.8 mi

General Practice

900 MONTLIMAR DR
Mobile, AL 36609

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

NPI 1992724124 (251) 343-5263

University Of South Alabama Mitchell Cancer Institute

2.4 mi

Multi-Specialty

1660 SPRINGHILL AVE
Mobile, AL 36604

Reassigned Medicare billing, Alabama enrollment
Medicare enrollment name: University Of South Alabama
394 clinicians in this Medicare group

NPI 1023210259 (251) 665-8000

Usa Health Physician Billing Services LLC

2.5 mi

Emergency Medicine

2451 UNIVERSITY HOSPITAL DR
Mobile, AL 36617

Reassigned Medicare billing, Alabama enrollment
Also billed through NPI 1871150508 (Alabama)
857 clinicians in this Medicare group

NPI 1285292912 (251) 470-7300

The Orthopaedic Group, PC

3.3 mi

Specialist

6144 AIRPORT BLVD
Mobile, AL 36608

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

NPI 1164489951 (251) 476-5050

Mobile Open Mri LLC

4.0 mi

Diagnostic Radiology

6576 AIRPORT BLVD STE A
Mobile, AL 36608

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

NPI 1548228323 (251) 460-4112

Forrest Health Billing

84 mi

Diagnostic Radiology

6051 U S HIGHWAY 49
Hattiesburg, MS 39401

Reassigned Medicare billing, Alabama enrollment

NPI 1942180252 (601) 288-7000

Pontchartrain Diagnostic Imaging LLC

118 mi

Diagnostic Radiology

95 JUDGE TANNER BLVD
Covington, LA 70433

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

NPI 1760734685 (985) 867-4050

Selma Radiology Associates P C

157 mi

Specialist

2055 NORMANDIE DR, SUITE 108
Montgomery, AL 36111

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

NPI 1669429296 (334) 269-6337

ER Physician Group At Jackson Hospital

172 mi

General Practice

4250 HOSPITAL DR
Marianna, FL 32446

Reassigned Medicare billing, Florida enrollment
180 clinicians in this Medicare group

NPI 1407801194 (850) 526-2200

Advanced Imaging Of Alabama LLC

245 mi

Diagnostic Radiology

1699 GOLDEN SPRINGS RD
Anniston, AL 36207

Reassigned Medicare billing, Alabama enrollment
Medicare enrollment name: Advanced Imaging Of Alabama P C
15 clinicians in this Medicare group

NPI 1629221510 (256) 835-0835

Advanced Imaging Of Gadsden LLC

260 mi

Diagnostic Radiology

820 S 4TH STREET
Gadsden, AL 35901

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

NPI 1972615581 (256) 549-0008

Prime Healthcare Services-Gadsden Physician Management LLC

261 mi

Family Medicine

303 BAY ST STE 401
Gadsden, AL 35901

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

NPI 1356731467 (256) 467-4731

Southern Radiology Associates, PLLC

345 mi

Diagnostic Radiology

1224 TROTWOOD AVE
Columbia, TN 38401

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

NPI 1467460725 (931) 647-5034

Radiology Imaging Specialists LLC

373 mi

Diagnostic Radiology

1714 SW 17TH ST STE 300
Ocala, FL 34471

Reassigned Medicare billing, Florida enrollment
48 clinicians in this Medicare group

NPI 1952763971 (352) 274-9565

East Georgia Radiology LLC

394 mi

Diagnostic Radiology

1499 FAIR RD
Statesboro, GA 30458

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

NPI 1003973207 (912) 486-1339

Scotland Memorial Hospital, Inc.

562 mi

Surgery

1007 CHERAW ST
Bennettsville, SC 29512

Reassigned Medicare billing, North Carolina enrollment
476 clinicians in this Medicare group

NPI 1598143620 (843) 535-0939

Columbus Regional Healthcare System

605 mi

General Acute Care Hospital

500 JEFFERSON ST
Whiteville, NC 28472

Reassigned Medicare billing, North Carolina enrollment
187 clinicians in this Medicare group

NPI 1376537555 (910) 642-8011

Valley Radiology P A

613 mi

Diagnostic Radiology

3186 VILLAGE DR STE 201
Fayetteville, NC 28304

Reassigned Medicare billing, Alabama and North Carolina enrollments
2 clinicians in this Medicare group

NPI 1093723538 (910) 486-5700

Southeast Iowa Regional Medical Center, Inc.

719 mi

General Practice

1221 S GEAR AVE
West Burlington, IA 52655

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

NPI 1164433884 (319) 768-3626

Concord Radiology PLLC

828 mi

Diagnostic Radiology

1602 AVENUE Q
Lubbock, TX 79401

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

NPI 1598260515 (888) 264-0330

Diagnostic Radiology PC

856 mi

Diagnostic Radiology

14301 FNB PKWY STE 100
Omaha, NE 68154

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

NPI 1497713291 (402) 493-1212

Grand Island Radiology Associates PC

910 mi

Diagnostic Radiology

3610 RICHMOND CIR, STE 100
Grand Island, NE 68803

Reassigned Medicare billing, Alabama enrollment

NPI 1932136405 (308) 398-6400

Plains Radiology Services LLC

910 mi

Diagnostic Radiology

3610 RICHMOND CIR STE 100
Grand Island, NE 68803

Reassigned Medicare billing, Alabama enrollment

NPI 1164677126 (308) 398-6400

Great Plains Radiology LLC

924 mi

Diagnostic Radiology

10 E 31ST ST
Kearney, NE 68847

Reassigned Medicare billing, Alabama enrollment

NPI 1427089838 (308) 398-6400

Eastern Radiological Associates PC

1,514 mi

Diagnostic Ultrasound

2900 12TH AVE N, 2E
Billings, MT 59101

Reassigned Medicare billing, Alabama and Montana enrollments

NPI 1639102171 (406) 237-5862

University Medical Center Of Southern Nevada

1,594 mi

Urgent Care

525 MARKS ST
Henderson, NV 89014

Reassigned Medicare billing, Nevada enrollment
522 clinicians in this Medicare group

NPI 1538721642 (702) 383-6210

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 41

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.

X-ray of chest, 1 view 71045

A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.

762 services537 patients

Ct scan head or brain without contrast 70450

A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.

209 services197 patients

Ct scan of abdomen and pelvis with contrast 74177

A CT scan of the abdomen and pelvis with contrast is an imaging procedure. A special dye, called contrast, is used to make certain areas more visible. This can help identify issues such as infections, tumors, or other abnormalities. The procedure is painless and usually takes about 30 minutes.

98 services98 patients

X-ray of abdomen, 1 view 74018

An X-ray of the abdomen, 1 view, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the structures in your abdomen, such as the stomach, liver, and intestines. This can help identify issues like blockages, infections, or injuries.

97 services76 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

91 services84 patients

Ct scan of chest without contrast 71250

A CT scan of the chest without contrast is a non-invasive imaging procedure. It uses special X-ray equipment to produce detailed images of your chest area, including your lungs and heart. It can help diagnose conditions such as lung diseases or heart disorders. It doesn't involve any dyes or contrast agents.

62 services60 patients

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.

61 services46 patients

Ct scan of chest with contrast 71260

A CT scan of the chest with contrast is an imaging procedure. A special dye (contrast) is used to highlight specific areas in your body, providing clearer pictures of your chest. This helps in diagnosing conditions related to your lungs, heart, and other chest structures.

60 services60 patients

Ct scan of abdomen and pelvis without contrast 74176

A CT scan of the abdomen and pelvis is a non-invasive medical test. It uses special X-ray equipment to create detailed images of your abdominal and pelvic areas. This helps doctors examine organs, tissues, and vessels. No contrast dye is used in this procedure.

59 services56 patients

Dxa bone density measurement of hip, pelvis, spine 77080

A DXA bone density measurement is a simple, quick, and non-invasive procedure that assesses the strength of your bones. This test uses X-rays to measure the amount of minerals, mainly calcium, in the hip, pelvis, and spine. It helps in early detection of osteoporosis or other bone diseases.

52 services52 patients

Ct scan of upper spine without contrast 72125

A CT scan of the upper spine without contrast is a non-invasive imaging test that uses X-rays to capture detailed images of your neck and upper back. It helps in identifying issues like fractures, tumors, or infections. No dye (contrast) is used in this scan.

50 services50 patients

Complete ultrasound scan behind abdominal cavity 76770

A complete ultrasound scan behind the abdominal cavity is a non-invasive imaging procedure. It uses sound waves to create pictures of the structures and organs located at the back of your abdomen. It helps in diagnosing health conditions and monitoring ongoing treatments.

44 services44 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.

37 services37 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

33 services31 patients

Limited ultrasound scan of abdomen 76705

A limited ultrasound scan of the abdomen is a non-invasive imaging test. It uses sound waves to produce images of the abdominal organs such as the liver, gallbladder, spleen, pancreas, and kidneys. This helps to identify any abnormalities or issues.

32 services30 patients

Ct scan of blood vessels of neck with contrast 70498

A CT scan of the neck's blood vessels with contrast is a diagnostic procedure. It uses X-rays and a special dye to create detailed images of your neck's blood vessels. This helps doctors detect issues such as blockages or abnormalities.

28 services28 patients

X-ray of foot, minimum of 3 views 73630

An X-ray of the foot, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones and tissues in your foot. This helps to identify fractures, infections, or other abnormalities. Multiple views ensure a comprehensive examination.

28 services26 patients

Ct scan of blood vessels of chest with contrast 71275

A CT scan of the chest with contrast is a non-invasive imaging test. It uses X-rays and a special dye to get detailed images of your blood vessels in the chest. This helps in diagnosing conditions related to heart and lungs.

26 services26 patients

Ct scan of blood vessels of head with contrast 70496

A CT scan of the head's blood vessels with contrast is a diagnostic procedure. A special dye (contrast) is injected into your body to make the blood vessels visible on the scan. This helps identify issues like blockages or abnormalities in your head's blood vessels.

25 services25 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.

25 services25 patients

Injection, methylprednisolone acetate, 80 mg J1040

Methylprednisolone acetate is a strong anti-inflammatory medication. It is often given as an 80 mg injection to reduce inflammation and pain. It's commonly used for conditions like arthritis, allergic disorders, or other inflammatory diseases.

25 services15 patients

X-ray of ankle, minimum of 3 views 73610

An ankle X-ray is a quick, painless imaging test. It involves capturing at least three different images or 'views' of your ankle using small amounts of radiation. These images help identify any abnormalities or injuries, such as fractures or arthritis.

24 services19 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

22 services22 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.

22 services21 patients

Ultrasound study of arm or leg veins with compression and maneuvers 93970

An ultrasound study of arm or leg veins with compression and maneuvers is a non-invasive procedure that uses sound waves to create images of your veins. This helps identify blood clots or other vein problems. During the procedure, pressure is applied to the veins and certain movements are performed to assess blood flow.

21 services21 patients

X-ray of lower and sacral spine, 2-3 views 72100

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

20 services20 patients

X-ray of knee, 1-2 views 73560

An X-ray of the knee with 1-2 views is a quick, painless test that produces images of the knee bones. It helps identify fractures, infections, or changes in the knee joint. During the procedure, you'll be asked to stay still while the X-ray machine captures the images.

20 services19 patients

Ct scan of lower spine without contrast 72131

A CT scan of the lower spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed images of your lower back area, helping to detect conditions like fractures, infections, or tumors. It's painless and generally quick.

19 services19 patients

X-ray of lower leg, 2 views 73590

An X-ray of the lower leg, 2 views, is a quick, painless test that produces images of the bones in your lower leg. It helps to identify fractures, infections, or diseases. Two different angles are used to provide a comprehensive view of the leg's structure.

19 services16 patients

Mri scan of brain without contrast 70551

An MRI scan of the brain without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your brain. It helps in detecting abnormalities like tumors, stroke, inflammation, or infection.

17 services17 patients

X-ray of lower and sacral spine, minimum of 4 views 72110

An X-ray of the lower and sacral spine involves capturing images of your lower back and tailbone area. It helps in identifying issues like fractures, arthritis, or other abnormalities. At least four different angles or 'views' are taken to get a comprehensive picture.

17 services15 patients

Ct scan of abdomen and pelvis before and after contrast 74178

A CT scan of your abdomen and pelvis with and without contrast helps visualize your internal organs better. Contrast is a special dye that improves the clarity of the images. It's taken orally or injected into your veins before the scan. The process is painless and quick.

17 services17 patients

Mri scan of brain before and after contrast 70553

An MRI scan of the brain, both before and after contrast, helps visualize different brain structures. Initially, images are taken without a contrast agent. Then, a safe dye is injected which helps highlight certain areas, providing clearer, more detailed images.

16 services16 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.

16 services16 patients

Complete ultrasound scan of abdomen 76700

A complete ultrasound scan of the abdomen is a non-invasive imaging procedure. It uses sound waves to produce images of the organs in your abdomen, such as the liver, gallbladder, spleen, pancreas, and kidneys. It helps in diagnosing, monitoring, and planning treatments.

16 services16 patients

X-ray of thigh bone, minimum 2 views 73552

An X-ray of the thigh bone is a non-invasive imaging test. It involves passing a small amount of radiation through the thigh to produce images of the bone structure. At least two different angles are captured for a comprehensive view. This helps detect fractures, infections, or other abnormalities.

14 services14 patients

X-ray of knee, 3 views 73562

An X-ray of the knee, 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the knee from three different angles. This helps medical professionals to diagnose and monitor conditions like arthritis, fractures, or infections. The process is quick and painless.

14 services13 patients

Ct scan of face without contrast 70486

A CT scan of the face without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your face, including bones, soft tissues, and blood vessels. It's often used to diagnose diseases, injuries, or abnormalities. No contrast dye is used in this procedure.

13 services13 patients

Mri scan of lower spinal canal without contrast 72148

An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.

13 services13 patients

Ct scan of leg without contrast 73700

A CT scan of the leg is a non-invasive imaging test that uses X-rays to capture detailed images of your leg's bones, muscles, and blood vessels. It doesn't use contrast dye and doesn't cause any pain. It helps in diagnosing injuries or diseases.

13 services13 patients

Nuclear medicine study of lung circulation 78580

A nuclear medicine study of lung circulation involves the use of a safe, radioactive substance to visualize lung function. It helps in diagnosing conditions like blood clots. The substance is injected and images are taken to study the blood flow in your lungs.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 36608 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

$81.90 typical visit price

range $52.65 – $161.63

Typical copayment $20.47 (range $13.16 – $40.40)

Most-billed visit code 99203

Established Patient

$66.08 typical visit price

range $16.56 – $131.65

Typical copayment $16.52 (range $4.14 – $32.91)

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.

96.56/100

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

Scored as part of a group practice

Quality

89.76

Promoting Interoperability

100

Improvement Activities

Other Providers at the Same Location NPPES 2

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

MELANIE D. BUSBY P.A.

Physician Assistant (Surgical)

3610 SPRINGHILL MEMORIAL DR. N.
MOBILE, AL 36608

Mobile County (251) 410-3600

MR. ROSS GARRETT KEY P.A.

Physician Assistant

3610 SPRINGHILL MEMORIAL DR. N.
MOBILE, AL 36608

Mobile County (251) 410-3600

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 Marshall Walker's NPI number?

The NPI number for Marshall Walker is 1619295441. It was assigned to this individual provider in the NPPES registry on May 4, 2010. The provider is also known as Mr. Marshall Kingman Walker M.D..

Where is Marshall Walker located?

Marshall Walker practices at 3610 Springhill Memorial Dr. N., Mobile, AL 36608. The listed phone number is (251) 410-3600.

What is Marshall Walker's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Vascular & Interventional Radiology, with taxonomy code 2085R0204X.

Is Marshall Walker enrolled in Medicare?

Yes. Marshall Walker 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 Marshall Walker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marshall Walker reassigns Medicare benefits to 26 organizations: American Family Care LLC (Mobile, AL), University Of South Alabama Mitchell Cancer Institute (Mobile, AL), Usa Health Physician Billing Services LLC (Mobile, AL), The Orthopaedic Group, PC (Mobile, AL), Mobile Open Mri LLC (Mobile, AL) and 21 more organizations, listed in the Medicare section above. 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 Marshall Walker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marshall Walker accept?

Health plans from Blue Cross Blue Shield of Arizona, Blue Cross and Blue Shield of Alabama, Blue Cross and Blue Shield of Texas, Cigna Healthcare and Molina Healthcare and 3 other insurers list Marshall Walker 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.

When was this NPI record last updated?

The NPPES record for Marshall Walker was last updated on November 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.