DR. WALTER W IMMEL (M.D.) – Gastroenterology Physician, NPI 1104826429
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
540 GASTROENTEROLOGY in VA
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Provider Addresses for DR. WALTER W IMMEL (M.D.)
5510, Alma Lane, Springfield, Fairfax, Virginia, 22151, United States
SPRINGFIELD, VA 221514012
Phone: (703) 642-5990
Fax: (703) 642-5003
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 90 Open Payments records for all available years, with a total value of $1,832.
Total Amount is formed as General ($1,832) + Research ($0) + Ownership ($0) = $1,832.
Last reported payment date: 2024-12-23 • Largest payer in this snapshot: ABBVIE INC. ($660).
Total Amount
$1,832
General + Research + Ownership
Payments
90
Total payment records
General Amount
$1,832
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-23
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $660 |
| Gilead Sciences, Inc. | $473 |
| PFIZER INC. | $160 |
| Janssen Biotech, Inc. | $132 |
| NESTLE HEALTHCARE NUTRITION INC. | $82 |
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: 2010-07-23
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 |
|---|---|---|---|---|
| I20100723000262 | I | Gastroenterology | DC | 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 | 323 | 226 | $0 |
| 45378 | Diagnostic exam of large bowel using a flexible endoscope | 207 | 205 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 165 | 164 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 62 | 60 | $0 |
| 99203 | New patient office or other outpatient visit, 30-44 minutes | 58 | 58 | $0 |
Insurance plans in this area (ZIP 22151)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Physician Assistant | VA | |
| Physician Assistant | VA | |
| - | DC | |
| Internal Medicine | VA | |
| Physician Assistant | VA | |
| - | VA | |
| Physician Assistant | VA | |
| Internal Medicine | VA | |
| Physician Assistant | VA | |
| G A S T R O E N T E R O L O G Y | VA |
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