Alexander Scott Leidner, M.D.
Nephrology Physician · Chicago, IL
Alexander Scott Leidner, M.D. is a nephrology physician with a practice address in Chicago, Illinois, and NPI 1174918957, issued on Mar 30, 2015. Check the license (Illinois 036146665, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Alexander Scott Leidner
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- 036146665 IL
125 067013 ID
Self-reported in NPPES; status is on the state search - Practice location
- 675 N Saint Clair St Ste 18-250, Chicago, IL 60611
- Phone
- (312) 695-0596
- Enumerated
- Mar 30, 2015
- Record last updated
- Jul 12, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (312) 926-4878
- Medicare enrollment
- Enrolled (PECOS I20210629002084); accepts Medicare assignment
- Medical or professional school
- University Of Texas Southwestern Medical School At Dallas, 2015
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 572 in Illinois → Look up another NPI →
Also registered at 675 N Saint Clair St Ste 18-250
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Justin Fiala, MDPulmonary Disease Physician1760821474
Verify Alexander Scott Leidner 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 036146665Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average nephrology physician in 2024
147 Medicare Part D claims for 41 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Losartan Potassium15 claims
- Bumetanide13 claims
- Amlodipine Besylate11 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
- Northwestern Medical Faculty FoundationChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alexander Scott Leidner among 572 nephrology physician records in Illinois
Alexander Scott Leidner, M.D. is one of 572 nephrology physician records with a practice address in Illinois. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 81% of them.
- NPI issued2015 · 81% of these records are older, 17% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2015 · median 2002 among the 433 with a school on file
- Record last updated2021 · 39% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Illinois
There are 572 nephrology physician records in Illinois.
All 572 in Illinois → Every provider in Chicago → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Shubhada Ahya, MDChicago, IL 606111336138767
- Mohammed Javeed Ansari, M.D.Chicago, IL 606111487688131
- Daniel Battle, MDChicago, IL 606111457325037
- Eudora Eng, M.D.Chicago, IL 606111639261621
- John Friedewald, MDChicago, IL 606111508801093
- Lorenzo Gallon, MDChicago, IL 606111427093848
- Cybele Ghossein, MDChicago, IL 606111376588830
- Bing Ho, MDChicago, IL 606111881771731
Common questions
What is Alexander Scott Leidner, M.D.'s NPI number?
Alexander Scott Leidner, M.D.'s National Provider Identifier (NPI) is 1174918957, issued on Mar 30, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Alexander Scott Leidner, M.D. located?
The NPPES record lists a practice address at 675 N Saint Clair St Ste 18-250, Chicago, IL, 60611. Phone: (312) 695-0596. Providers update this record themselves, so call before visiting.
How can I verify Alexander Scott Leidner, M.D.'s license?
NPPES lists Illinois license number 036146665, 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 Alexander Scott Leidner, M.D. prescribe under Medicare Part D?
In 2024, Alexander Scott Leidner, M.D. had 147 Medicare Part D claims for 41 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Alexander Scott Leidner, 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.