Howard R. Baker, D.O.
Internal Medicine Physician · Vernon Hills, IL
Howard R. Baker, D.O. is an internal medicine physician with a practice address in Vernon Hills, Illinois, and NPI 1558326439, issued on Apr 20, 2006. Check the license (Illinois 036087725, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Howard R. Baker
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036087725 IL
Self-reported in NPPES; status is on the state search - Practice location
- 870 N Milwaukee Ave FL 2, Vernon Hills, IL 60061
- Phone
- (847) 535-7157
- Enumerated
- Apr 20, 2006
- Record last updated
- Nov 22, 2023
- Fax
- (847) 535-8210
- Medicare enrollment
- Enrolled (PECOS I20080929000460); accepts Medicare assignment
- Medical or professional school
- Des Moines University Of Osteopathic Medicine And Health Sciences, 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 870 N Milwaukee Ave FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Harjyot Chahal, M.D.Endocrinology, Diabetes & Metabolism Physician1306160247
- Neal Shah, M.D.Internal Medicine Physician1801258561
- Steven Witzel, MDInternal Medicine Physician1922064641
- Brigit Zielinski, APRN, CNPNurse Practitioner1104674969
Verify Howard R. Baker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036087725Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.0 times the Medicare Part D claims of the average internal medicine physician in 2024
9,409 Medicare Part D claims for 745 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 233 claims were for opioids.
Most prescribed
- Atorvastatin Calcium669 claims
- Amlodipine Besylate443 claims
- Levothyroxine Sodium383 claims
- Losartan Potassium284 claims
- Metformin Hcl234 claims
- Metoprolol Succinate229 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $338.05
5 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Northwestern Medical Faculty FoundationGrayslake, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Howard R. Baker among 7,238 internal medicine physician records in Illinois
Howard R. Baker, D.O. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1991 · median 2003 among the 3,580 with a school on file
- Record last updated2023 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 internal medicine physician records list a practice address in Vernon Hills
They are 19 of the 704 NPPES records with a practice address in Vernon Hills, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Vernon Hills → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Rafa Adi, M.D.Vernon Hills, IL 600611205845054
- Nadeem Alavi, DOVernon Hills, IL 600611609934983
- Alan Aronson, MDVernon Hills, IL 600611992864946
- Fanan Falouji, M.D.Vernon Hills, IL 600611306855481
- Vincent Fang, MDVernon Hills, IL 600611851450654
- Louis Kanter, MDVernon Hills, IL 600611366464281
- John Kiriklakis, M.D.Vernon Hills, IL 600611730189713
- Inna Podoksik, MDVernon Hills, IL 600611679632129
Common questions
What is Howard R. Baker, D.O.'s NPI number?
Howard R. Baker, D.O.'s National Provider Identifier (NPI) is 1558326439, issued on Apr 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Howard R. Baker, D.O. located?
The NPPES record lists a practice address at 870 N Milwaukee Ave FL 2, Vernon Hills, IL, 60061. Phone: (847) 535-7157. Providers update this record themselves, so call before visiting.
How can I verify Howard R. Baker, D.O.'s license?
NPPES lists Illinois license number 036087725, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Howard R. Baker, D.O. prescribe under Medicare Part D?
In 2024, Howard R. Baker, D.O. had 9,409 Medicare Part D claims for 745 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.