Clayton Malaker, M.D.
NPI 1144221961 · Family Medicine Physician · Belvidere, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clayton Malaker, M.D. is a Family Medicine Physician provider in Belvidere, IL (NPI 1144221961).
Provider details
- NPI number
- 1144221961
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036075458 (IL)
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
3,861 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 819 | $16 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 795 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 761 | $87 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 261 | $123 |
| Manual Urinalysis Test With Examination Using Microscope, Non-Automated81000 | 214 | $4 |
| Red Blood Cell Sedimentation Rate, to Detect Inflammation, Non-Automated |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 148 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 613 | 161 |
| Lisinopril | 371 | 102 |
| Levothyroxine Sodium | 368 | 87 |
| Metformin Hcl | 275 | 78 |
| Metoprolol Succinate | 274 | 77 |
| Amlodipine Besylate | 263 | 67 |
| Tamsulosin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$944 across 53 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
- 2005-08-02
- Last updated
- 2010-03-16
Frequently asked questions
- What is Clayton Malaker's NPI number?
- Clayton Malaker's National Provider Identifier (NPI) is 1144221961, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clayton Malaker's specialty?
- Clayton Malaker is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Clayton Malaker located?
- Clayton Malaker's practice location on file with NPPES is 824 Van Buren St, Belvidere, IL 61008-2252.
- What is Clayton Malaker's phone number?
- The practice phone number listed in the NPPES registry for Clayton Malaker is (815) 544-3481.
- Does Clayton Malaker accept Medicare?
- Clayton Malaker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Clayton Malaker's NPI active?
- Yes — Clayton Malaker's NPI (1144221961) is active in the NPPES registry as of the last update on 2010-03-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.