BRIAN N WALKER (DO) – Hematology & Oncology Physician, NPI 1144290032
Hematology & Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
337 HEMATOLOGY/ONCOLOGY in TN
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Provider Addresses for BRIAN N WALKER (DO)
322, Hospital Boulevard, Jackson, Madison County, West Tennessee, Tennessee, 38305, United States
JACKSON, TN 38305
Phone: (731) 668-1668
Fax: (731) 668-6720
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 69 Open Payments records for all available years, with a total value of $1,574.
Total Amount is formed as General ($1,574) + Research ($0) + Ownership ($0) = $1,574.
Last reported payment date: 2024-12-12 • Largest payer in this snapshot: Merck Sharp & Dohme LLC ($259).
Total Amount
$1,574
General + Research + Ownership
Payments
69
Total payment records
General Amount
$1,574
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-12
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Merck Sharp & Dohme LLC | $259 |
| PFIZER INC. | $236 |
| E.R. Squibb & Sons, L.L.C. | $215 |
| SANOFI-AVENTIS U.S. LLC | $100 |
| Daiichi Sankyo Inc. | $92 |
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: 2008-05-14
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
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 |
|---|---|---|---|---|
| I20080514000881 | I | Medical Oncology | TN | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 559 | 363 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 400 | 241 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 148 | 72 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 99 | 99 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 65 | 49 | $0 |
Insurance plans in this area (ZIP 38305)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| H E M A T O L O G Y/ O N C O L O G Y | VA | |
| Nurse Practitioner | TN | |
| Nurse Practitioner | TN | |
| Infectious Disease, Internal Medicine | TN | |
| - | TN | |
| Nurse Practitioner | TN | |
| Gynecological Oncology, Obstetrics/Gynecology | TN | |
| Interventional Radiology, Diagnostic Radiology | MI | |
| Diagnostic Radiology | TN | |
| Pulmonary Disease, Critical Care (Intensivists) | MO |
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