Mark Klucka, D.O.
NPI 1801902432 · Family Medicine Physician · Alton, IL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Klucka, D.O. is a Family Medicine Physician provider in Alton, IL (NPI 1801902432).
Provider details
- NPI number
- 1801902432
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 036077227 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
412 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 Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 114 | $94 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 98 | $128 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 67 | $247 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 46 | $124 |
| Dilation of Esophagus43450 | 30 | $39 |
| Colorectal Cancer Screening; Colonoscopy on Individual at High Risk |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 151 | 64 |
| Pantoprazole Sodium | 64 | 25 |
| Dicyclomine Hcl | 23 | — |
| Famotidine | 20 | — |
| Esomeprazole Magnesium | 12 | — |
| Metronidazole | 12 | 12 |
| Linaclotidebrand: Linzess | 11 | — |
| Mesalamine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$350 across 13 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 (2)
- 2 Saint Anthonys WaySuite 305Alton, IL 62002-4569Phone: (618) 465-2761Fax: (618) 465-4750
- 3 Saint Elizabeth BlvdO Fallon, IL 62269Phone: (618) 641-5803
Registry dates
- Enumerated
- 2006-08-23
- Last updated
- 2025-09-19
- Certified
- 2025-09-19
Frequently asked questions
- What is Mark Klucka's NPI number?
- Mark Klucka's National Provider Identifier (NPI) is 1801902432, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Klucka's specialty?
- Mark Klucka is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Klucka located?
- Mark Klucka's practice location on file with NPPES is 4 Memorial Dr Ste 230, Alton, IL 62002-6704.
- What is Mark Klucka's phone number?
- The practice phone number listed in the NPPES registry for Mark Klucka is (618) 463-7874.
- Does Mark Klucka accept Medicare?
- Mark Klucka is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Klucka's NPI active?
- Yes — Mark Klucka's NPI (1801902432) is active in the NPPES registry as of the last update on 2025-09-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.