John Flaherty, MD
Infectious Disease Physician · Chicago, IL
John Flaherty, MD is an infectious disease physician with a practice address in Chicago, Illinois, and NPI 1821028150, issued on Jul 3, 2006. Check the license (Illinois 036073534, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- John Flaherty
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 036073534 IL
Self-reported in NPPES; status is on the state search - Practice location
- 676 N Saint Clair St, Chicago, IL 60611
- Phone
- (312) 926-8358
- Enumerated
- Jul 3, 2006
- Record last updated
- Oct 2, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (312) 926-9630
- Medicare enrollment
- Enrolled (PECOS I20060206000222); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 464 in Illinois → Look up another NPI →
Also registered at 676 N Saint Clair St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sharon Adam, M.D.Diagnostic Radiology Physician1619361763
- Jessica Altman, MDHematology & Oncology Physician1831391200
- Rama AlzeinStudent in an Organized Health Care Education/Training Program1528904133
- Sarah Anderson, NPNurse Practitioner1043243355
- Michael Angarone, D.O.Infectious Disease Physician1194806190
- Cara Angelotta, MDPsychiatry Physician1194017525
Verify John Flaherty 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 036073534Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% more Medicare Part D claims than the average infectious disease physician in 2024
802 Medicare Part D claims for 81 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 57% of claims.
Most prescribed
- Dovato115 claims
- Biktarvy83 claims
- Tivicay76 claims
- Descovy71 claims
- Genvoya29 claims
- Sulfamethoxazole-Trimethoprim29 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).
John Flaherty among 464 infectious disease physician records in Illinois
John Flaherty, MD is one of 464 infectious disease physician records with a practice address in Illinois. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1983 · median 2004 among the 311 with a school on file
- Record last updated2014 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Illinois
There are 464 infectious disease physician records in Illinois.
All 464 in Illinois → Every provider in Chicago → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Chad Achenbach, MDChicago, IL 606111548278674
- Maureen Bolon, MDChicago, IL 606111851368773
- Susan Cohn, MDChicago, IL 606111306861091
- Shannon Galvin, M.D.Chicago, IL 606111003862400
- Alan Hauser, MDChicago, IL 606111790881647
- Robert Hirschtick, MDChicago, IL 606111730113135
- Robert Murphy, MDChicago, IL 606111558476416
- Gary Noskin, MDChicago, IL 606111154436020
Common questions
What is John Flaherty, MD's NPI number?
John Flaherty, MD's National Provider Identifier (NPI) is 1821028150, issued on Jul 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Flaherty, MD located?
The NPPES record lists a practice address at 676 N Saint Clair St, Chicago, IL, 60611. Phone: (312) 926-8358. Providers update this record themselves, so call before visiting.
How can I verify John Flaherty, MD's license?
NPPES lists Illinois license number 036073534, 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 John Flaherty, MD prescribe under Medicare Part D?
In 2024, John Flaherty, MD had 802 Medicare Part D claims for 81 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is John Flaherty, 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.