Walter Immel, M.D.
NPI 1104826429 · Gastroenterology Physician · Springfield, VA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Walter Immel, M.D. is a Gastroenterology Physician provider in Springfield, VA (NPI 1104826429).
Provider details
- NPI number
- 1104826429
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 0101039106 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
755 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Diagnostic Exam of Large Bowel Using a Flexible Endoscope45378 | 227 | $382 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 220 | $148 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 111 | $539 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 63 | $404 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 37 | $130 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sod Picosulf/Mag Ox/Citric Acbrand: Clenpiq | 122 | 122 |
| Esomeprazole Magnesium | 115 | 47 |
| Pantoprazole Sodium | 113 | 43 |
| Omeprazole | 55 | 19 |
| Linaclotidebrand: Linzess | 42 | 16 |
| Lipase/Protease/Amylasebrand: Creon | 21 | — |
| Sod Sulf/Pot Chloride/Mag Sulfbrand: Sutab |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$849 across 40 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-28
- Last updated
- 2007-07-09
Frequently asked questions
- What is Walter Immel's NPI number?
- Walter Immel's National Provider Identifier (NPI) is 1104826429, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Walter Immel's specialty?
- Walter Immel is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Walter Immel located?
- Walter Immel's practice location on file with NPPES is 5510 Alma Ln, Springfield, VA 22151-4012.
- What is Walter Immel's phone number?
- The practice phone number listed in the NPPES registry for Walter Immel is (703) 642-5990.
- Does Walter Immel accept Medicare?
- Walter Immel is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Walter Immel's NPI active?
- Yes — Walter Immel's NPI (1104826429) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.