Lake Forest Internal Medicine, Ltd
NPI 1871786731 · Internal Medicine Physician · Libertyville, IL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lake Forest Internal Medicine, Ltd is a Internal Medicine Physician organization in Libertyville, IL (NPI 1871786731).
Provider details
- NPI number
- 1871786731
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Elliot Miller, Vice President/ Treasurer(847) 816-3084
- License
- 042617582 (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
18 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
- 2007-08-23
- Last updated
- 2012-10-24
Frequently asked questions
- What is Lake Forest Internal Medicine, Ltd's NPI number?
- Lake Forest Internal Medicine, Ltd's National Provider Identifier (NPI) is 1871786731, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Lake Forest Internal Medicine, Ltd?
- Lake Forest Internal Medicine, Ltd is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Lake Forest Internal Medicine, Ltd located?
- Lake Forest Internal Medicine, Ltd's practice location on file with NPPES is 1800 Hollister Dr, Libertyville, IL 60048-5263.
- What is Lake Forest Internal Medicine, Ltd's phone number?
- The practice phone number listed in the NPPES registry for Lake Forest Internal Medicine, Ltd is (847) 816-3084.
- Does Lake Forest Internal Medicine, Ltd accept Medicare?
- Lake Forest Internal Medicine, Ltd 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 Lake Forest Internal Medicine, Ltd?
- The authorized official listed on Lake Forest Internal Medicine, Ltd's NPPES record is Elliot Miller, Vice President/ Treasurer. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Lake Forest Internal Medicine, Ltd's NPI active?
- Yes — Lake Forest Internal Medicine, Ltd's NPI (1871786731) is active in the NPPES registry as of the last update on 2012-10-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.