Richard H. Bertenshaw, MD
Endocrinology, Diabetes & Metabolism Physician · Darien, IL
Richard H. Bertenshaw, MD is an endocrinology, diabetes & metabolism physician with a practice address in Darien, Illinois, and NPI 1992721898, issued on Jul 14, 2006. Check the license (Illinois 036074851, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Richard H. Bertenshaw
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 036074851 IL
Self-reported in NPPES; status is on the state search - Practice location
- 7545 Wilton RD, Darien, IL 60561
- Phone
- (708) 921-6053
- Enumerated
- Jul 14, 2006
- Record last updated
- Aug 3, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (877) 992-6901
- Medicare enrollment
- Enrolled (PECOS I20101028000778); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1985
- Entity
- Type 1 · individual
Verify Richard H. Bertenshaw 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 036074851Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
585 Medicare Part D claims for 79 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 62% of claims.
Most prescribed
- Ozempic96 claims
- Jardiance70 claims
- Trulicity65 claims
- Levothyroxine Sodium47 claims
- Mounjaro30 claims
- Metformin Hcl25 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: $44.13
2 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 5,661 providers of this specialty with any payment received $5,742.15 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
- Adventist Health Partners IncLa Grange, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Illinois
There are 436 endocrinology, diabetes & metabolism physician records in Illinois.
Other endocrinology, diabetes & metabolism physician records in Illinois
- Maha Abboud, MD FACEMelrose Park, IL1346208956
- Sara Abdelaziz, MDChicago, IL1598258089
- Jumana Abdelkarim, MDSpringfield, IL1154815363
- Toufic Abdo, MDChampaign, IL1962497032
- Caroline Abe, MD, MPHChicago, IL1316574122
- Issa Abedmahmoud, MDHerrin, IL1528042975
- Makarem Abulimon, M.D.Springfield, IL1699207381
- Lily Agrawal, M.D.Oakbrook Terrace, IL1922110394
- Maria Aguilera Astudillo, MDSycamore, IL1164040887
- Ayesha Akbar, M.D.Frankfort, IL1407809064
Common questions
What is Richard H. Bertenshaw, MD's NPI number?
Richard H. Bertenshaw, MD's National Provider Identifier (NPI) is 1992721898, issued on Jul 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Richard H. Bertenshaw, MD located?
The NPPES record lists a practice address at 7545 Wilton RD, Darien, IL, 60561. Phone: (708) 921-6053. Providers update this record themselves, so call before visiting.
How can I verify Richard H. Bertenshaw, MD's license?
NPPES lists Illinois license number 036074851, 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 Richard H. Bertenshaw, MD prescribe under Medicare Part D?
In 2024, Richard H. Bertenshaw, MD had 585 Medicare Part D claims for 79 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.