Farzan Mahmood, M.D
Rheumatology Physician · Naperville, IL
Farzan Mahmood, M.D is a rheumatology physician with a practice address in Naperville, Illinois, and NPI 1841484961, issued on Aug 31, 2007. Check the license (Illinois 036-119936, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Farzan Mahmood
- Credential
- M.D
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License numbers
- 036-119936 IL
125049227 IL
56163 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1508 Sequoia RD, Naperville, IL 60540
- Phone
- (630) 585-7100
- Enumerated
- Aug 31, 2007
- Record last updated
- May 28, 2024
- Medicare enrollment
- Enrolled (PECOS I20240320003620); accepts Medicare assignment
- Entity
- Type 1 · individual
Verify Farzan Mahmood 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 036-119936Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% more Medicare Part D claims than the average rheumatology physician in 2024
2,365 Medicare Part D claims for 505 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 55 claims were for opioids.
Most prescribed
- Alendronate Sodium410 claims
- Prednisone327 claims
- Methotrexate188 claims
- Allopurinol186 claims
- Meloxicam148 claims
- Duloxetine Hcl136 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
- Advocate Health And Hospitals CorporationAurora, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rheumatology Physician providers in Illinois
There are 340 rheumatology physician records in Illinois.
Other rheumatology physician records in Illinois
- Haneen Abdalhadi, MDRockford, IL1750887592
- Suhair Abdel-Jalil, MDEvanston, IL1174572929
- Hrudya Abraham, MDPeoria, IL1497135750
- Elaine Adams, MDMaywood, IL1699752592
- Emem Adolf-Ubokudom, M.D.Chicago, IL1861780603
- Shri Agrawal, M.D.Chicago, IL1912937178
- Umber Ahmad, DOMcHenry, IL1083957153
- Saba AhmedChicago, IL1861448003
- Harpinder Ajmani, M.D.Chicago, IL1720101066
- Iqbal Akhter, M.D.Mount Vernon, IL1083719991
Common questions
What is Farzan Mahmood, M.D's NPI number?
Farzan Mahmood, M.D's National Provider Identifier (NPI) is 1841484961, issued on Aug 31, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Farzan Mahmood, M.D located?
The NPPES record lists a practice address at 1508 Sequoia RD, Naperville, IL, 60540. Phone: (630) 585-7100. Providers update this record themselves, so call before visiting.
How can I verify Farzan Mahmood, M.D's license?
NPPES lists Illinois license number 036-119936, 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 Farzan Mahmood, M.D prescribe under Medicare Part D?
In 2024, Farzan Mahmood, M.D had 2,365 Medicare Part D claims for 505 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.