Gerald Lewis, M.D
NPI 1225102478 · Internal Medicine Physician · Des Plaines, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gerald Lewis, M.D is a Internal Medicine Physician provider in Des Plaines, IL (NPI 1225102478).
Provider details
- NPI number
- 1225102478
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- 036055258 (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
19 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
- 2006-11-20
- Last updated
- 2011-02-07
Frequently asked questions
- What is Gerald Lewis's NPI number?
- Gerald Lewis's National Provider Identifier (NPI) is 1225102478, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gerald Lewis's specialty?
- Gerald Lewis is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gerald Lewis located?
- Gerald Lewis's practice location on file with NPPES is 150 N River Rd, Des Plaines, IL 60016-1272.
- What is Gerald Lewis's phone number?
- The practice phone number listed in the NPPES registry for Gerald Lewis is (847) 298-0310.
- Does Gerald Lewis accept Medicare?
- Gerald Lewis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gerald Lewis's NPI active?
- Yes — Gerald Lewis's NPI (1225102478) is active in the NPPES registry as of the last update on 2011-02-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.