Tiffany A. Karas, MD
Endocrinology, Diabetes & Metabolism Physician · Geneva, IL
Tiffany A. Karas, MD is an endocrinology, diabetes & metabolism physician with a practice address in Geneva, Illinois, and NPI 1013993336, issued on Dec 19, 2005. Check the license (Illinois 036-109127, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Tiffany A. Karas
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- 036-109127 IL
Self-reported in NPPES; status is on the state search - Practice location
- 302 Randall RD, Geneva, IL 60134
- Phone
- (630) 208-6775
- Enumerated
- Dec 19, 2005
- Record last updated
- Apr 9, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (630) 208-7937
- Medicaid ID
- 036109127 IL
- Medicare enrollment
- Enrolled (PECOS I20051206000899); accepts Medicare assignment
- Medical or professional school
- Southern Illinois University School Of Medicine, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 436 in Illinois → Look up another NPI →
Also registered at 302 Randall RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Heather Anaya, DOMaternal & Fetal Medicine Physician1285890855
- Arvin Bhatia, MDGastroenterology Physician1841446788
- Steven Bielski, M.D.Endocrinology, Diabetes & Metabolism Physician1144227570
- Dean Bieniak, PA-CPhysician Assistant1386724581
- Andrew Bregman, MDGastroenterology Physician1982680013
- Kristina Bustamante, PHD, MA, BS, CCC-SLPSpeech-Language Pathologist1003206798
Verify Tiffany A. Karas 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 036-109127Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
4,213 Medicare Part D claims for 491 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 55% of claims.
Most prescribed
- Levothyroxine Sodium596 claims
- Lantus Solostar292 claims
- Synthroid248 claims
- Ozempic244 claims
- Jardiance199 claims
- Metformin Hcl177 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).
Bills Medicare through one group practice
- Central Dupage Physician GroupGeneva, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tiffany A. Karas among 436 endocrinology, diabetes & metabolism physician records in Illinois
Tiffany A. Karas, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2000 · median 2006 among the 295 with a school on file
- Record last updated2013 · 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 Geneva → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Steven Bielski, M.D.Geneva, IL 601341144227570
- Elisa Hofmann, M.D.Geneva, IL 601341043217490
- Zeenat Parveen, M.D.Geneva, IL 601341912099060
- Demetra Rupp, M.D.Geneva, IL 601341518131903
- Karthik Subbu, M.D.Geneva, IL 601341760974950
- Hafsa Amjed, M.DGlen Ellyn, IL 601371104272798
- Winnie Nhan, DOGlen Ellyn, IL 601371245681709
- Nasrin Azad, MDHines, IL 601411831270909
Common questions
What is Tiffany A. Karas, MD's NPI number?
Tiffany A. Karas, MD's National Provider Identifier (NPI) is 1013993336, issued on Dec 19, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Tiffany A. Karas, MD located?
The NPPES record lists a practice address at 302 Randall RD, Geneva, IL, 60134. Phone: (630) 208-6775. Providers update this record themselves, so call before visiting.
How can I verify Tiffany A. Karas, MD's license?
NPPES lists Illinois license number 036-109127, 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 Tiffany A. Karas, MD prescribe under Medicare Part D?
In 2024, Tiffany A. Karas, MD had 4,213 Medicare Part D claims for 491 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Tiffany A. Karas, MD'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.