William Cox, M.D.
NPI 1407928062 · Sports Medicine (Orthopaedic Surgery) Physician · Crystal Lake, IL
Enrolled with Medicare as Practitioner - Sports Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Cox, M.D. is a Sports Medicine (Orthopaedic Surgery) Physician provider in Crystal Lake, IL (NPI 1407928062).
Provider details
- NPI number
- 1407928062
- Entity type
- Individual
- Primary specialty
- Sports Medicine (Orthopaedic Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036080933 (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 tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 10370 Haligus Rd Ste 201Huntley, IL 60142-9582Phone: (815) 356-5200Fax: (815) 356-5262
Registry dates
- Enumerated
- 2006-11-15
- Last updated
- 2018-10-19
Frequently asked questions
- What is William Cox's NPI number?
- William Cox's National Provider Identifier (NPI) is 1407928062, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Cox's specialty?
- William Cox is listed in the NPPES registry with a primary specialty of Sports Medicine (Orthopaedic Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is William Cox located?
- William Cox's practice location on file with NPPES is 420 N Il Route 31, Crystal Lake, IL 60012.
- What is William Cox's phone number?
- The practice phone number listed in the NPPES registry for William Cox is (815) 356-5200.
- Does William Cox accept Medicare?
- William Cox is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Cox's NPI active?
- Yes — William Cox's NPI (1407928062) is active in the NPPES registry as of the last update on 2018-10-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.