Dr. John D. Nicolas, MD
- Medicare services, 2024
- 1,772
- Medicare patients, 2024
- 473
- Part D claims, 2024
- 6,364
- MIPS score, 2024
- 95
- Hospital affiliations
- 5
- Practice address
- 259 E Erie St, Chicago, IL 60611
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northwestern Memorial Hospital - Lavin Family Pavilion Recovery Room - HOPD
Acute Care Hospital outpatient department · Chicago, Illinois
Find Dr. Nicolas' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John D. Nicolas is an internist in Chicago, Illinois
Dr. Nicolas practices at Northwestern Memorial Hospital - Lavin Family Pavilion Recovery Room - HOPD in Chicago, Illinois.
Dr. Nicolas' NPI, 1417940917, was assigned on August 30, 2005. Dr. Nicolas graduated from Loyola University of Chicago, Stritch School of Medicine in 1987. Dr. Nicolas holds Illinois license 036077725.
- NPI
- 1417940917NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6608803085
- NPI enumeration date
- August 30, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John D. Nicolas practices at Northwestern Memorial Hospital - Lavin Family Pavilion Recovery Room - HOPD in Chicago, Illinois
Dr. Nicolas' primary practice is Northwestern Memorial Hospital - Lavin Family Pavilion Recovery Room - HOPD, at 259 E Erie St, Chicago, IL 60611.
- Northwestern Memorial Hospital - Lavin Family Pavilion Recovery Room - HOPD259 E Erie St, Chicago, IL 60611
Source: Dmand AI Affiliation Data
Dr. John D. Nicolas is affiliated with 8 sites of care and 1 medical group
Dr. Nicolas' primary practice is Northwestern Memorial Hospital - Lavin Family Pavilion Recovery Room - HOPD in Chicago, Illinois. Dr. Nicolas is also affiliated with Northwestern Memorial Hospital. The medical group on file is Northwestern Medical Faculty Foundation. Dmand AI also links Dr. Nicolas to 4 more hospitals, 1 group practice or clinic and 1 home health agency, each named with a free account. Dr. Nicolas' employer is on file too: a hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John D. Nicolas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nicolas practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Memorial Hospital - Lavin Family Pavilion Recovery Room - HOPD | Available with a free account |
| +7 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John D. Nicolas is one of 5,652 internists in Illinois
Internal medicine is Dr. Nicolas' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Nicolas is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Nicolas
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John D. Nicolas billed Medicare for 1,772 services in 2024
CMS data shows 1,772 Medicare services from Dr. Nicolas across 15 procedure codes in 2024, for 473 Medicare patients. Medicare paid $164,252 for them. Every service was in an office.
Dr. Nicolas' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9822024: 9464%
- Other services
- 2023: 4602024: 58828%
- Tests and treatments
- 2023: 1222024: 23895%
Dr. Nicolas compared with the Illinois median for internists, 2024
- Dr. Nicolas
- Illinois median
- Medicare services
- 1,772vs 5663.1 times
- Medicare patients
- 473vs 2082.3 times
- Part D claims
- 5,681vs 28420.0 times
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Nicolas' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nicolas and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John D. Nicolas treated 473 Medicare patients in 2024, average age 76
CMS counts 473 Medicare patients who saw Dr. Nicolas in 2024. The largest group is 65 to 74, with 199 patients. 74% of them have high cholesterol, and 71% have high blood pressure. 6% are also on Medicaid. Their average risk score is 0.93, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Nicolas' median patient age at 74, with 35% women.
Dr. Nicolas' Medicare patients by age, 2024
Dr. Nicolas' Medicare patients by sex, 2024
- Women19040%
- Men28360%
Chronic conditions among Dr. Nicolas' Medicare patients, 2024
- High cholesterol74%
- High blood pressure71%
- Arthritis40%
- Cancer27%
- Ischemic heart disease23%
- Diabetes18%
- Osteoporosis16%
- Atrial fibrillation15%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nicolas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women35%
- Men65%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John D. Nicolas wrote 6,364 Medicare Part D claims in 2024
In 2024, Dr. Nicolas wrote 6,364 Medicare Part D claims for 577 patients. 90% of them were for generic drugs. CMS names the drug for 5,681 of them, across 84 drugs with 11 or more claims each, at $287,151 in total drug cost. In 2023, CMS named 5,238 claims across 85 drugs.
Dr. Nicolas' Part D claims by kind of drug, 2024
- Generic5,738 claims90%
- Brand-name602 claims9%
- Other24 claims0%
Dr. Nicolas' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Nicolas' Part D claims, 2024
- Opioids1%72 of 6,364 claims
- Antibiotics1%43 of 6,364 claims
- Antipsychotics, patients 65 and over0%14 of 6,364 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5,2382024: 5,6818%
Drugs named by CMS: 84 in 2024, 85 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. John D. Nicolas scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Nicolas for performance year 2024, reported through an alternative payment model (APM). Dr. Nicolas accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Nicolas as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Nicolas' MIPS scores, performance year 2024
- 95of 100Final score
- 83of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. John D. Nicolas received $29 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Nicolas from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Boston Scientific Corporation paid the most, $29.
Companies that paid Dr. Nicolas the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John D. Nicolas graduated from Loyola University of Chicago, Stritch School of Medicine
Dr. Nicolas graduated from Loyola University of Chicago, Stritch School of Medicine in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John D. Nicolas's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John D. Nicolas
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John D. Nicolas' NPI number?
Dr. John D. Nicolas' NPI number is 1417940917. It was assigned on August 30, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John D. Nicolas?
Dr. John D. Nicolas is an internist in Chicago, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John D. Nicolas practice?
Dr. Nicolas practices at 259 E Erie St, Chicago, IL 60611. Dr. Nicolas' primary practice is Northwestern Memorial Hospital - Lavin Family Pavilion Recovery Room - HOPD in Chicago, Illinois. Dmand AI also links Dr. Nicolas to 4 hospitals, 1 group practice or clinic and 1 home health agency.
What is Dr. John D. Nicolas' medical license number?
Dr. Nicolas holds Illinois license 036077725.
Which hospitals is Dr. John D. Nicolas affiliated with?
Dr. Nicolas is affiliated with Northwestern Memorial Hospital. Dmand AI links Dr. Nicolas to 4 more hospitals.
What medical group is Dr. John D. Nicolas part of?
Dr. Nicolas is linked to Northwestern Medical Faculty Foundation.
Does Dr. John D. Nicolas accept Medicare?
Yes. CMS data shows Dr. Nicolas billed Medicare for 1,772 services in 2024, and Dr. Nicolas accepts Medicare assignment.
Does Dr. John D. Nicolas offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Nicolas as offering telehealth services.
What is Dr. John D. Nicolas' MIPS score?
Dr. Nicolas' MIPS final score for performance year 2024 is 95 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. John D. Nicolas see?
CMS counts 473 Medicare patients who saw Dr. Nicolas in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. John D. Nicolas bill to Medicare?
In 2024, Dr. Nicolas' most billed Medicare services were office visit, established patient (99214), medicare service (G0439) and office visit, established patient (99213).
Where did Dr. John D. Nicolas go to medical school?
Dr. Nicolas graduated from Loyola University of Chicago, Stritch School of Medicine in 1987.
What drugs does Dr. John D. Nicolas prescribe most?
In 2024 Medicare Part D data, Dr. Nicolas' most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Levothyroxine Sodium.
Has Dr. John D. Nicolas received payments from drug or device companies?
CMS Open Payments shows $29 in general payments to Dr. Nicolas from 1 company from 2024 to 2024. The largest total came from Boston Scientific Corporation.
How long has Dr. John D. Nicolas been practicing?
Dr. Nicolas graduated from medical school in 1987, 39 years ago.
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