NPPES file of Aug 9, 2026

Benjamin Samuel Frank, MD

Rheumatology Physician · Barrington, IL

Benjamin Samuel Frank, MD is a rheumatology physician with a practice address in Barrington, Illinois, and NPI 1871554097, issued on Mar 29, 2006. Check the license (Illinois 036-100804, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1871554097
Name
Benjamin Samuel Frank
Credential
MD
Primary taxonomy
Rheumatology Physician 207RR0500X
License number
036-100804 IL
Self-reported in NPPES; status is on the state search
Practice location
500 W Highway 22, Barrington, IL 60010
Phone
(847) 381-3000
Enumerated
Mar 29, 2006
Record last updated
Sep 7, 2012 (not updated in 14 years: call before relying on the address or phone)
Fax
(847) 382-4755
Medicare enrollment
Enrolled (PECOS I20100330000623); accepts Medicare assignment
Medical or professional school
University Of Chicago, Pritzker School Of Medicine, 1997
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 500 W Highway 22

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Ahmed Farrag, MDFamily Medicine Physician1255547220
  2. Stacie Lannon, AU.D.Audiologist1972050631

Verify Benjamin Samuel Frank in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
    Search for license 036-100804
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Illinois license search

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32% more Medicare Part D claims than the average rheumatology physician in 2024

2,603 Medicare Part D claims for 399 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. 119 claims were for opioids.

  1. Benjamin Frank2,603
  2. Specialty average1,978

Most prescribed

  1. Methotrexate486 claims
  2. Hydroxychloroquine Sulfate469 claims
  3. Leflunomide280 claims
  4. Sulfasalazine180 claims
  5. Venlafaxine Hcl Er141 claims
  6. Prednisone124 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.

Bills Medicare through one group practice

  1. Mercy Health System CorporationWoodstock, IL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Benjamin Samuel Frank among 340 rheumatology physician records in Illinois

Benjamin Samuel Frank, MD is one of 340 rheumatology physician records with a practice address in Illinois. 83% 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, 52% newer
  • In a Medicare fileYes · 83% of these records are
  • In the CMS Doctors and Clinicians fileYes · 72% of these records are
  • Graduated1997 · median 2003 among the 244 with a school on file
  • Record last updated2012 · 59% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Rheumatology Physician providers in Illinois

There are 340 rheumatology physician records in Illinois.

The 8 rheumatology physician records with the nearest ZIP codes

  1. Jadwiga Czajkowska, D.O.Elk Grove Village, IL 600071629242094
  2. Dina Dadabhoy, MDElk Grove Village, IL 600071427133032
  3. Josna Haritha, MDElk Grove Village, IL 600071922445097
  4. Bruce Johnson, MDElk Grove Village, IL 600071912043621
  5. Prerana PanchalElk Grove Village, IL 600071851346134
  6. Glenn Weiner, DOElk Grove Village, IL 600071437295144
  7. Stephen Kozlowski, M.D.Crystal Lake, IL 600141285749390
  8. Andrew Benck, M.D.Bannockburn, IL 600151326574971

Common questions

What is Benjamin Samuel Frank, MD's NPI number?

Benjamin Samuel Frank, MD's National Provider Identifier (NPI) is 1871554097, issued on Mar 29, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Benjamin Samuel Frank, MD located?

The NPPES record lists a practice address at 500 W Highway 22, Barrington, IL, 60010. Phone: (847) 381-3000. Providers update this record themselves, so call before visiting.

How can I verify Benjamin Samuel Frank, MD's license?

NPPES lists Illinois license number 036-100804, 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 Benjamin Samuel Frank, MD prescribe under Medicare Part D?

In 2024, Benjamin Samuel Frank, MD had 2,603 Medicare Part D claims for 399 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.