Walter Hassig, M.D.
NPI 1730152794 · Gastroenterology Physician · Federal Way, WA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Walter Hassig, M.D. is a Gastroenterology Physician provider in Federal Way, WA (NPI 1730152794).
Provider details
- NPI number
- 1730152794
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD00037341 (WA)
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
307 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) |
|---|---|---|
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 66 | $184 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 45 | $118 |
| Moderate Sedation Services Provided By the Same Physician Or Other Qualified Health Care Professional Performing a Gastrointestinal Endoscopic Service That Sedation Supports, Requiring the Presence of an Independent Trained Observer to Assist in the MonitoG0500 | 41 | $6 |
| Colorectal Cancer Screening; Colonoscopy on Individual at High RiskG0105 | 40 | $160 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 31 | $137 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 222 | 69 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 103 | 98 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 81 | 77 |
| Omeprazole | 78 | 29 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 71 | 69 |
| Mesalamine | 31 | — |
| Esomeprazole Magnesium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$449 across 14 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
- 2006-02-09
- Last updated
- 2019-06-21
Frequently asked questions
- What is Walter Hassig's NPI number?
- Walter Hassig's National Provider Identifier (NPI) is 1730152794, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Walter Hassig's specialty?
- Walter Hassig is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Walter Hassig located?
- Walter Hassig's practice location on file with NPPES is 33915 1st Way S Ste 200, Federal Way, WA 98003-6396.
- What is Walter Hassig's phone number?
- The practice phone number listed in the NPPES registry for Walter Hassig is (253) 272-5127.
- Does Walter Hassig accept Medicare?
- Walter Hassig is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Walter Hassig's NPI active?
- Yes — Walter Hassig's NPI (1730152794) is active in the NPPES registry as of the last update on 2019-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.