John Flaherty, MD
Infectious Disease Internal Medicine
John Flaherty is an Infectious Disease Internal Medicine specialist based in Chicago, IL with over 43 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Also practices: INTERNAL MEDICINE
John Flaherty, MD practices as part of a group infectious disease specialist practice in Chicago, IL. With 43+ years of experience, he has been practicing in the Chicago area. Among his Medicare patients, common conditions include hypertension, high cholesterol, and ischemic_heart (per CMS data). CMS MIPS quality score: 94.1/100 (2023).
At a glance
- Federal MIPS score higher than 46% of MIPS-scored doctors in Illinois
- Virtual visits available — no app or travel required
Older · 4252dNPPES updated 2014-10-02 · verify NPI on CMS · Verify license at Illinois Department of Financial & Professional Regulation — Medical
Contact & Location
Practice Location
676 N Saint Clair St Suite 940, Chicago, IL 60611-2927
How Does This Doctor Compare?
Based on Medicare data, this doctor has an average quality score compared to other doctors in Illinois.
MIPS Score
202394.1/100
Illinois avg: 88.6 · US avg: 83.6
✓ Higher than most doctors nationally(+10.5 pts)
Average range among MIPS-scored doctors in IllinoisHow the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Generic Rx
↑ Higher = better41.9%
Illinois avg: 82.9 · US avg: 82.8
⚠ Lower than most doctors nationally(-40.9 pts)
How often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
195
Unique beneficiaries
Standard volumePrescription Recipients
77
Patients prescribed
Prescriptions Written
787
Total claims
Total Medicare drug cost: $1.65M
Percentile rankings compared against 2,844 reporting peers in Illinois.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and Ischemic Heart Disease.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+2%) — a focus area for this doctor
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↑ More patients than average (+23%) — a focus area for this doctor
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↑ More patients than average (+21%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↑ More patients than average (+15%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-4%) — less common here
The heart cannot pump blood efficiently enough to meet the body's needs
US avg: 22.5%↑ More patients than average (+19%) — a focus area for this doctor
Conditions affecting emotional state, including depression and bipolar disorder
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
43 years in practice
Senior practitioner
Infectious disease specialists diagnose and treat complex infections including HIV/AIDS, hepatitis, tuberculosis, antibiotic-resistant infections (MRSA), post-surgical infections, and travel-related illnesses. They also provide pre-travel vaccination counseling and manage infections in immunocompromised patients.
Taxonomy: 207RI0200X
Mailing address
680 N Lake Shore Dr Suite 1000, Chicago, IL 60611-4546
Differs from practice location
Virtual Infectious Disease Care With John Flaherty
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with John Flaherty for blood pressure monitoring, cholesterol management, follow-up consultations — no travel to Chicago required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about John Flaherty
NPI records show Dr. Flaherty as active with telehealth listed in Chicago, IL. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (312) 926-8358.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Physician Comparator. See Data Methodology.
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Contact John Flaherty
Practice Location
676 N Saint Clair St Suite 940, Chicago, IL 60611-2927
Mailing Address
680 N Lake Shore Dr Suite 1000, Chicago, IL 60611-4546
This is a provider directory. Contact the office directly to schedule appointments.
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