Physician Profile
Unclaimed ProfileAbout LUDWIG
John Travis Ludwig, M.D. practices nephrology in Chicago, IL. John is a 2010 graduate of Pennsylvania State University College of Medicine. John is also listed as specializing in internal medicine and pediatrics. Medicare claims data shows John provided 756 services to 342 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
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (708) 252-5809
- Email not available
Practice Locations
5140 N CALIFORNIA AVE STE 600
Chicago, IL 60625
Procedures Most Often Billed to Medicare
756 services · 342 patients · 9 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Dialysis services, 4 or more physician visits per month (20 years or older) | Treatment | 90960 |
84 |
| Dialysis services, 2-3 physician visits per month (20 years or older) | Treatment | 90961 |
23 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
335 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
98 |
| 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 |
57 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
51 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
47 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
45 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
16 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other nephrology specialists at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 2
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 — 30 related providers in 4 groups
Other nephrology specialists in Chicago 6
Same specialty, same city.
Trained at Pennsylvania State University College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2010 at Pennsylvania State University College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Dialysis services, 4 or more physician visits per month (20 years or older) 8
Providers in IL who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Ludwig?
Dr. Ludwig is a nephrology in Chicago, IL. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “NEPHROLOGY”.
NPI registry
What is Dr. Ludwig's address?
Dr. Ludwig is listed at 5140 N CALIFORNIA AVE STE 600, Chicago, IL 60625. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Ludwig?
The number on file is (708) 252-5809. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Ludwig?
Dr. Ludwig's National Provider Identifier is 1215342449. 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. Ludwig train?
Dr. Ludwig attended Pennsylvania State University College of Medicine, graduating in 2010. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Ludwig have?
Dr. Ludwig has 16 years experience. Calculated from a graduation year of 2010, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Ludwig perform?
According to Medicare billing data, Dr. Ludwig provides treatments such as dialysis services, 4 or more physician visits per month and dialysis services, 2-3 physician visits per month, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Ludwig's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ludwig. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.