Physician Profile
Unclaimed ProfileAbout NICOLAS
Based in Chicago, IL, John D Nicolas, MD is listed in the NPI registry under internal medicine. John graduated from Loyola University of Chicago, Stritch School of Medicine in 1987. Medicare claims data shows John provided 1,772 services to 1,485 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Nicolas specialize in?
Dr. Nicolas is an internal medicine in Chicago, IL. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where is Dr. Nicolas located?
Dr. Nicolas is listed at 259 E ERIE ST SUITE 2300, Chicago, IL 60611. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Nicolas's phone number?
The number on file is (312) 926-6000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Nicolas?
Dr. Nicolas's National Provider Identifier is 1417940917. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Nicolas go to medical school?
Dr. Nicolas attended Loyola University of Chicago, Stritch School of Medicine, graduating in 1987. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Nicolas have?
Dr. Nicolas has 39 years experience. Calculated from a graduation year of 1987, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Nicolas do most often?
According to Medicare billing data, Dr. Nicolas provides treatments such as influenza vaccine split virus, preservative free and sarscv2 vac 30mcg trs-suc im, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Nicolas's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Nicolas. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (312) 926-6000
- Email not available
Practice Locations
259 E ERIE ST SUITE 2300
Chicago, IL 60611
Procedures Most Often Billed to Medicare
1,772 services · 1,485 patients · 15 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Influenza vaccine split virus, preservative free | Treatment | 90662 |
78 |
| Sarscv2 vac 30mcg trs-suc im | Treatment | 91320 |
70 |
| Admn sarscov2 vacc 1 dose | Treatment | 90480 |
70 |
| Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | Treatment | 90677 |
20 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
582 |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
302 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
193 |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
146 |
| Telephone medical discussion with physician, 11-20 minutes | Office visit | 99442 |
83 |
| Administration of influenza virus vaccine | Billing code | G0008 |
79 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internal medicines at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 31 related providers in 4 groups
Other internal medicines in Chicago 7
Same specialty, same city.
Trained at Loyola University of Chicago, Stritch School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1987 at Loyola University of Chicago, Stritch School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Influenza vaccine split virus, preservative free 8
Providers in IL who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.