MR. MARSHALL K. WALKER (M.D.) – Diagnostic Radiology Physician, NPI 1619295441
Diagnostic Radiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
87 GENERAL PRACTICE in AL
Provider Addresses for MR. MARSHALL K. WALKER (M.D.)
3610 SPRINGHILL MEMORIAL DR N
MOBILE, AL 366081162
Phone: (251) 410-3600
Fax: (251) 410-3700
Type: Mailing
3610 SPRINGHILL MEMORIAL DR. N.
MOBILE, AL 366081162
Phone: (251) 410-3600
Fax: (251) 410-3743
Type: Location
1365 MARKET STREET
PASCAGOULA, MS 39567
Phone: (228) 762-1353
Fax: (228) 762-1359
Type: Mailing
2809 DENNY AVE
PASCAGOULA, MS 395815301
Phone: (228) 762-1353
Fax: (228) 762-1359
Type: Location
4250 Hospital Dr
Marianna, FL 324461917
Phone: (850) 526-2200
Fax: (850) 718-2844
Type: Location
P. O. BOX 91119
MOBILE, AL 366911119
Phone: (251) 460-0326
Fax: (251) 460-2846
Type: Mailing
6801 AIRPORT BOULEVARD
MOBILE, AL 366083709
Phone: (251) 266-1000
Fax: (228) 762-1359
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 39 Open Payments records for all available years, with a total value of $2,651.
Total Amount is formed as General ($2,651) + Research ($0) + Ownership ($0) = $2,651.
Last reported payment date: 2024-06-04 • Largest payer in this snapshot: Boston Scientific Corporation ($1,568).
Total Amount
$2,651
General + Research + Ownership
Payments
39
Total payment records
General Amount
$2,651
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-06-04
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Boston Scientific Corporation | $1,568 |
| Nevro Corp. | $273 |
| Spinal Simplicity, LLC | $148 |
| PAINTEQ LLC | $148 |
| Vertos Medical, Inc. | $132 |
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: 2025-01-08
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 5 Medicare enrollment records; no due dates published yet.
Enrollment records
5
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 |
|---|---|---|---|---|
| I20111003000606 | I | Diagnostic Radiology | AL | TBD |
| I20170517001819 | I | Diagnostic Radiology | MS | TBD |
| I20230927000725 | I | Diagnostic Radiology | MT | TBD |
| I20241220000233 | I | Diagnostic Radiology | NC | TBD |
| I20250108001406 | I | Diagnostic Radiology | FL | 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 |
|---|---|---|---|---|
| 71045 | X-ray of chest, 1 view | 146 | 104 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 63 | 63 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 59 | 40 | $0 |
| J1040 | Injection, methylprednisolone acetate, 80 mg | 44 | 35 | $0 |
| 72148 | Mri scan of lower spinal canal without contrast | 43 | 43 | $0 |
Insurance plans in this area (ZIP 36608)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| DIAGNOSTIC RADIOLOGY | MS | 74177 | CT scan of abdomen and pelvis with contrast | 18 | 17 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Diagnostic Radiology | MA | |
| Diagnostic Radiology | FL | |
| Diagnostic Radiology | FL | |
| Diagnostic Radiology | ND | |
| - | FL | |
| Diagnostic Radiology | NY | |
| Diagnostic Radiology | TX | |
| Diagnostic Radiology | FL | |
| Interventional Radiology, Diagnostic Radiology | MO |
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