Grayslake Medical Group, LLC
NPI 1437236015 · Internal Medicine Physician · Libertyville, IL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grayslake Medical Group, LLC is a Internal Medicine Physician organization in Libertyville, IL (NPI 1437236015).
Provider details
- NPI number
- 1437236015
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Robert Romanelli, President(847) 548-8269
- License
- 036095667 (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
- 2006-11-01
- Last updated
- 2018-09-18
Frequently asked questions
- What is Grayslake Medical Group, LLC's NPI number?
- Grayslake Medical Group, LLC's National Provider Identifier (NPI) is 1437236015, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Grayslake Medical Group, LLC?
- Grayslake Medical Group, LLC is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Grayslake Medical Group, LLC located?
- Grayslake Medical Group, LLC's practice location on file with NPPES is 900 Technology Way Ste 230, Libertyville, IL 60048-5364.
- What is Grayslake Medical Group, LLC's phone number?
- The practice phone number listed in the NPPES registry for Grayslake Medical Group, LLC is (847) 548-8269.
- Does Grayslake Medical Group, LLC accept Medicare?
- Grayslake Medical Group, LLC 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 Grayslake Medical Group, LLC?
- The authorized official listed on Grayslake Medical Group, LLC's NPPES record is Robert Romanelli, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Grayslake Medical Group, LLC's NPI active?
- Yes — Grayslake Medical Group, LLC's NPI (1437236015) is active in the NPPES registry as of the last update on 2018-09-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.