Elk Grove Internists, P.C.
NPI 1659307874 · Internal Medicine Physician · Elk Grove Vlg, IL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Elk Grove Internists, P.C. is a Internal Medicine Physician organization in Elk Grove Vlg, IL (NPI 1659307874).
Provider details
- NPI number
- 1659307874
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mark Weisberg, Owner(847) 981-8856
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
20 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
- 2006-06-23
- Last updated
- 2008-01-09
Frequently asked questions
- What is Elk Grove Internists, P.C.'s NPI number?
- Elk Grove Internists, P.C.'s National Provider Identifier (NPI) is 1659307874, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Elk Grove Internists, P.C.?
- Elk Grove Internists, P.C. is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Elk Grove Internists, P.C. located?
- Elk Grove Internists, P.C.'s practice location on file with NPPES is 810 Biesterfield Rd, Elk Grove Vlg, IL 60007-7312.
- What is Elk Grove Internists, P.C.'s phone number?
- The practice phone number listed in the NPPES registry for Elk Grove Internists, P.C. is (847) 981-8856.
- Does Elk Grove Internists, P.C. accept Medicare?
- Elk Grove Internists, P.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 Elk Grove Internists, P.C.?
- The authorized official listed on Elk Grove Internists, P.C.'s NPPES record is Mark Weisberg, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Elk Grove Internists, P.C.'s NPI active?
- Yes — Elk Grove Internists, P.C.'s NPI (1659307874) is active in the NPPES registry as of the last update on 2008-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.