Matthew Kaspar, MD
NPI 1275853319 · Gastroenterology Physician · Green Bay, WI
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Matthew Kaspar, MD is a Gastroenterology Physician provider in Green Bay, WI (NPI 1275853319).
Provider details
- NPI number
- 1275853319
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 77224-20 (WI)
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
16 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
272 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) |
|---|---|---|
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 65 | $223 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 40 | $71 |
| Insertion of Guide Wire With Dilation of Esophagus Using a Flexible Endoscope43248 | 38 | $138 |
| Diagnostic Exam of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43235 | 33 | $105 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 29 | $118 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 203 | 200 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 90 | 90 |
| Pantoprazole Sodium | 67 | 27 |
| Sod Sulf/Pot Chloride/Mag Sulfbrand: Sutab | 56 | 56 |
| Azathioprine | 16 | — |
| Dupilumabbrand: Dupixent Pen | 16 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$287 across 5 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
Additional practice locations (3)
- 1200 E Marshall StRichmond, VA 23298-5049Phone: (804) 828-4060Fax: (804) 828-5348
- 2820 Roosevelt RdMarinette, WI 54143-3834Phone: (715) 735-5225Fax: (715) 735-5388
- 820 Arbutus AveOconto, WI 54153-2004Phone: (920) 835-1100Fax: (920) 835-1099
Registry dates
- Enumerated
- 2010-06-10
- Last updated
- 2022-08-29
- Certified
- 2022-08-29
Frequently asked questions
- What is Matthew Kaspar's NPI number?
- Matthew Kaspar's National Provider Identifier (NPI) is 1275853319, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Matthew Kaspar's specialty?
- Matthew Kaspar is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Matthew Kaspar located?
- Matthew Kaspar's practice location on file with NPPES is 725 S Webster Ave, Green Bay, WI 54301-3500.
- What is Matthew Kaspar's phone number?
- The practice phone number listed in the NPPES registry for Matthew Kaspar is (920) 431-5650.
- Does Matthew Kaspar accept Medicare?
- Matthew Kaspar is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Matthew Kaspar's NPI active?
- Yes — Matthew Kaspar's NPI (1275853319) is active in the NPPES registry as of the last update on 2022-08-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.