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Internal Medicine

Howard R. Baker, DO

Works at hospitals in Libertyville, IL · Barrington, IL · Arlington Heights, IL … · Illinois

Summary

Howard R. Baker, DO (Internal Medicine) is listed by Medicare at 5 hospitals in Libertyville, IL, Barrington, IL and Arlington Heights, IL and other places. NPI 1558326439. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Howard R. Baker, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Internal MedicinePrimary specialty
YesAccepts Medicare assignment
YesOffers telehealth
35Years since medical school (graduated 1991)
Des Moines University Of Osteopathic Medicine And Health SciencesMedical school
MaleGender (as listed)
Northwestern Medical Faculty FoundationGroup practice

Quick answers

Which hospitals does Howard R. Baker work at?
Medicare's official clinician data lists Howard R. Baker at 5 hospitals: Advocate Condell Medical Center, Advocate Good Shepherd Hospital, Northwest Community Hospital 1, Northwestern Lake Forest Hospital and Northwestern Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Howard R. Baker see patients?
Medicare's clinician data lists 9 practice locations, including Lake Forest, IL, Grayslake, IL and Deerfield, IL. Call before your visit to confirm the address.
What is Howard R. Baker's specialty?
Medicare lists Internal Medicine as the primary specialty.
Does Howard R. Baker accept Medicare assignment?
Yes. Medicare's clinician data says Howard R. Baker accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
Does Howard R. Baker offer telehealth?
Medicare's clinician data says Howard R. Baker offers telehealth services. Ask the office which visits can be done by video or phone.
What is the phone number for Howard R. Baker?
(847) 735-8500, as listed in official Medicare / NPI Registry data.
What is Howard R. Baker's NPI number?
1558326439. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Howard R. Baker works

Medicare's Facility Affiliation Data lists Howard R. Baker at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Howard R. Baker is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 9; the Medicare profile lists all.

  • 1200 N Westmoreland Rd, Suite 100Lake Forest, IL 60045 (847) 735‑8500
  • 1475 E Belvidere RdGrayslake, IL 60030
  • 350 S Waukegan, Suite 150Deerfield, IL 60015 (312) 926‑3107
  • 350 S Waukegan RdDeerfield, IL 60015 (312) 926‑6146
  • 6155 Grand AveGurnee, IL 60031

Group practices

Medicare enrollment lists Howard R. Baker as a member of this group (CMS data updated 2026-10-02).

  • Northwestern Medical Faculty Foundation4,503 clinicians in the group

Specialties

Find other Internal Medicine doctors in Illinois →

Other internal medicine doctors in Lake Forest

Clinicians with the same Medicare primary specialty in Lake Forest, IL — not a recommendation.

All internal medicine doctors in Lake Forest →

Clinician information

CredentialDO
Medical schoolDes Moines University Of Osteopathic Medicine And Health Sciences
Graduation year1991
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1558326439
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians