Amy O'Brian Thomas, M.D.
Allergy & Immunology Physician · Gurnee, IL
Amy O'Brian Thomas, M.D. is an allergy & immunology physician with a practice address in Gurnee, Illinois, and NPI 1134359862, issued on Jul 15, 2009. Check the license (Illinois 036.135378, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Amy O'Brian Thomas
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- 036.135378 IL
Self-reported in NPPES; status is on the state search - Practice location
- 6155 Grand Ave Ste 200, Gurnee, IL 60031
- Phone
- (847) 535-7647
- Enumerated
- Jul 15, 2009
- Record last updated
- Mar 23, 2022
- Fax
- (224) 271-6642
- Medicare enrollment
- Enrolled (PECOS I20150812006241); accepts Medicare assignment
- Medical or professional school
- State University Of Ny Upstate Medical University, 2009
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 162 in Illinois → Look up another NPI →
Also registered at 6155 Grand Ave Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Amy O'Brian Thomas 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 036.135378Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
153 Medicare Part D claims for 30 beneficiaries, against an average of 741 among the 2,899 providers of this specialty who prescribed in Part D. Brand-name drugs were 33% of claims.
Most prescribed
- Ipratropium Bromide24 claims
- Azelastine Hcl21 claims
- Montelukast Sodium19 claims
- Fluticasone Propionate15 claims
- Levocetirizine Dihydrochloride12 claims
- Nucala11 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 MIPS final score for 2023 (Medicare payment program): 94.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $331.01
8 payments; by number, the most common kind was food and beverage; the largest payer was Genzyme Corporation. The 2,496 providers of this specialty with any payment received $8,321.81 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 FoundationGurnee, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Amy O'Brian Thomas among 162 allergy & immunology physician records in Illinois
Amy O'Brian Thomas, M.D. is one of 162 allergy & immunology physician records with a practice address in Illinois. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 67% of them.
- NPI issued2009 · 67% of these records are older, 31% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2009 · median 2001 among the 114 with a school on file
- Record last updated2022 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in Illinois
There are 162 allergy & immunology physician records in Illinois.
All 162 in Illinois → Every provider in Gurnee → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Joshua Brownell, MDGurnee, IL 600311538699723
- Mark Kaplan, MDGurnee, IL 600311861591661
- Joel Klein, M.D.Highland Park, IL 600351770566820
- Lisa Sullivan, M.D.Highland Park, IL 600351386650273
- Evelyn Angulo, M.D.Glenview, IL 600261184967770
- Yasmeen Bilimoria, MDGlenview, IL 600261780636662
- Karen Jackson, MDGlenview, IL 600261346384534
- Julie Kim, M.D.Glenview, IL 600261336460146
Common questions
What is Amy O'Brian Thomas, M.D.'s NPI number?
Amy O'Brian Thomas, M.D.'s National Provider Identifier (NPI) is 1134359862, issued on Jul 15, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Amy O'Brian Thomas, M.D. located?
The NPPES record lists a practice address at 6155 Grand Ave Ste 200, Gurnee, IL, 60031. Phone: (847) 535-7647. Providers update this record themselves, so call before visiting.
How can I verify Amy O'Brian Thomas, M.D.'s license?
NPPES lists Illinois license number 036.135378, 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 Amy O'Brian Thomas, M.D. prescribe under Medicare Part D?
In 2024, Amy O'Brian Thomas, M.D. had 153 Medicare Part D claims for 30 beneficiaries; the average among allergy & immunology physician prescribers was 741. Part D covers Medicare prescriptions only.
What is Amy O'Brian Thomas, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.1 of 100. 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.