Clayton R. Malaker, M.D., S.c.
NPI 1144559485 · Family Medicine Physician · Belvidere, IL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clayton R. Malaker, M.D., S.c. is a Family Medicine Physician organization in Belvidere, IL (NPI 1144559485).
Provider details
- NPI number
- 1144559485
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Clayton Malaker, President(815) 544-3481
- License
- 036-075458 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-12-16
- Last updated
- 2010-03-16
Frequently asked questions
- What is Clayton R. Malaker, M.D., S.c.'s NPI number?
- Clayton R. Malaker, M.D., S.c.'s National Provider Identifier (NPI) is 1144559485, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Clayton R. Malaker, M.D., S.c.?
- Clayton R. Malaker, M.D., S.c. is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Clayton R. Malaker, M.D., S.c. located?
- Clayton R. Malaker, M.D., S.c.'s practice location on file with NPPES is 824 Van Buren St, Belvidere, IL 61008-2252.
- What is Clayton R. Malaker, M.D., S.c.'s phone number?
- The practice phone number listed in the NPPES registry for Clayton R. Malaker, M.D., S.c. is (815) 544-3481.
- Does Clayton R. Malaker, M.D., S.c. accept Medicare?
- Clayton R. Malaker, M.D., S.c. is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Clayton R. Malaker, M.D., S.c.?
- The authorized official listed on Clayton R. Malaker, M.D., S.c.'s NPPES record is Clayton Malaker, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Clayton R. Malaker, M.D., S.c.'s NPI active?
- Yes — Clayton R. Malaker, M.D., S.c.'s NPI (1144559485) 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.