Clark Antonson, MD
NPI 1831182757 · Gastroenterology Physician · Lincoln, NE
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clark Antonson, MD is a Gastroenterology Physician provider in Lincoln, NE (NPI 1831182757).
Provider details
- NPI number
- 1831182757
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 17282 (NE)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
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
854 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 | 231 | $236 |
| Colorectal Cancer Screening; Colonoscopy on Individual at High RiskG0105 | 72 | $174 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 70 | $77 |
| Diagnostic Exam of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43235 | 61 | $101 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 59 | $104 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 337 | 335 |
| Pantoprazole Sodium | 201 | 53 |
| Omeprazole | 185 | 62 |
| Azathioprine | 46 | — |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 33 | 32 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 31 | 31 |
| Mesalamine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,623 across 24 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
- 2005-08-25
- Last updated
- 2025-01-27
- Certified
- 2025-01-27
Frequently asked questions
- What is Clark Antonson's NPI number?
- Clark Antonson's National Provider Identifier (NPI) is 1831182757, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clark Antonson's specialty?
- Clark Antonson is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Clark Antonson located?
- Clark Antonson's practice location on file with NPPES is 4545 R St, Lincoln, NE 68503-3723.
- What is Clark Antonson's phone number?
- The practice phone number listed in the NPPES registry for Clark Antonson is (402) 465-4545.
- Does Clark Antonson accept Medicare?
- Clark Antonson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Clark Antonson's NPI active?
- Yes — Clark Antonson's NPI (1831182757) is active in the NPPES registry as of the last update on 2025-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.