Brian Thomas Layden, MD
Endocrinology, Diabetes & Metabolism Physician · Chicago, IL
Brian Thomas Layden, MD is an endocrinology, diabetes & metabolism physician with a practice address in Chicago, Illinois, and NPI 1841474913, issued on Dec 24, 2007. Check the license (Illinois 036.120870, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Brian Thomas Layden
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 036.120870 IL
125049063 IL
Self-reported in NPPES; status is on the state search - Practice location
- 303 E Chicago Ave, Chicago, IL 60611
- Phone
- (312) 695-3095
- Enumerated
- Dec 24, 2007
- Record last updated
- Mar 12, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100716000696); accepts Medicare assignment
- Medical or professional school
- Illinois Medical College, 2005
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 436 in Illinois → Look up another NPI →
Also registered at 303 E Chicago Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Brian Thomas Layden 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 036.120870Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
278 Medicare Part D claims for 29 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 46% of claims.
Most prescribed
- Levothyroxine Sodium52 claims
- Trulicity25 claims
- Teriparatide17 claims
- Ozempic16 claims
- Ultra-Fine Short Pen Needle14 claims
- Methimazole13 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 87.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $4,497.23
5 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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
- The Board OF Trustees OF The University OF IllinoisChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brian Thomas Layden among 436 endocrinology, diabetes & metabolism physician records in Illinois
Brian Thomas Layden, MD is one of 436 endocrinology, diabetes & metabolism physician records with a practice address in Illinois. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 38% of them.
- NPI issued2007 · 38% of these records are older, 50% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2005 · median 2006 among the 295 with a school on file
- Record last updated2014 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Illinois
There are 436 endocrinology, diabetes & metabolism physician records in Illinois.
All 436 in Illinois → Every provider in Chicago → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Grazia Aleppo, MDChicago, IL 606111689603268
- Grant Barish, M.D.Chicago, IL 606111265526073
- Joseph Bass, MD, PHDChicago, IL 606111700810017
- Gerhard Bauman, MDChicago, IL 606111457326910
- Mary Gillam, MDChicago, IL 606111588695084
- Allison Hahr, M.D.Chicago, IL 606111083774889
- Peter Kopp, M.D.Chicago, IL 606111598827842
- William Lowe, M.D.Chicago, IL 606111093879652
Common questions
What is Brian Thomas Layden, MD's NPI number?
Brian Thomas Layden, MD's National Provider Identifier (NPI) is 1841474913, issued on Dec 24, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Brian Thomas Layden, MD located?
The NPPES record lists a practice address at 303 E Chicago Ave, Chicago, IL, 60611. Phone: (312) 695-3095. Providers update this record themselves, so call before visiting.
How can I verify Brian Thomas Layden, MD's license?
NPPES lists Illinois license number 036.120870, 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 Brian Thomas Layden, MD prescribe under Medicare Part D?
In 2024, Brian Thomas Layden, MD had 278 Medicare Part D claims for 29 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Brian Thomas Layden, MD's MIPS final score?
The 2023 MIPS final score is 87.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.