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DR. JOHN TRAVIS LUDWIG M.D.
NPI 1215342449
Internal Medicine - Nephrology in Chicago, IL

Active since June 26, 2014PECOS EnrolledAccepts Medicare Assignment
5140 N CALIFORNIA AVE STE 600, CHICAGO, IL 60625(708) 252-5809 Get Directions Write a Review

NPPES record last updated: April 12, 2022. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Apr 12, 2022, Apr 15, 2021, Jul 15, 2020 and 1 more (4 updates tracked since 2018).

About Dr. John Travis Ludwig M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JOHN TRAVIS LUDWIG M.D. (NPI 1215342449) is an individual nephrology provider in Chicago, Illinois, licensed in Michigan (4301114038) and active in the NPI registry since June 2014. He is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and maintains a secondary practice location in Ann Arbor.

NPPES Registry Identity

NPI1215342449
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDR. JOHN TRAVIS LUDWIGCredential: M.D.
Location Address5140 N CALIFORNIA AVE STE 600Chicago, IL 60625-3664
Mailing Address120 W 22nd St Ste 200Oak Brook, IL 60523-1563 · (630) 573-5000
Phone(708) 252-5809
Sole ProprietorNo
Medical School CMSPennsylvania State University College Of MedicineGraduated 2010
Enumeration DateJune 26, 2014
Last NPPES UpdateApril 12, 20224 updates tracked since enumeration
NPPES CertifiedApril 12, 2022
✔ NPI 1215342449 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in MI · 4301114038
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
Also ListedInternal MedicineTaxonomy 207R00000X · License 125065890 (IL), 4301114038 (MI)
Also ListedPediatricsTaxonomy 208000000X · License 4301114038 (MI), 125065890 (IL)
5140 N CALIFORNIA AVE STE 600, Chicago, IL 60625
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Secondary Practice Location 1

Location 11500 E Medical Center DrAnn Arbor, MI 48109 · Phone (734) 764-3269

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. John Travis Ludwig M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5890087134
PECOS Enrollment IDI20210412002165
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show John Ludwig reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Nephrology Associates Of Northern Illinois, Ltd.
14 mi
Nephrology
120 W 22ND ST STE 200
Oak Brook, IL 60523
  • Reassigned Medicare billing, Illinois enrollment
  • 161 clinicians in this Medicare group
NPI 1124069182 (630) 575-5000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
335 services114 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
98 services29 patients
Dialysis services, 4 or more physician visits per month (20 years or older) 90960
Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
84 services24 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
51 services28 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
47 services44 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
45 services41 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northshore University Healthsystem - Evanston Hospital

Acute Care Hospitals · Evanston, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number140010
Location2650 Ridge AveEvanston, IL 60201 · Cook County
Emergency services Birthing friendly

Presence Saint Francis Hospital

Acute Care Hospitals · Evanston, IL
2/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140080
Location355 Ridge AveEvanston, IL 60202 · Cook County
Emergency services

Swedish Hospital

Acute Care Hospitals · Chicago, IL
2/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140114
Location5145 N California AveChicago, IL 60625 · Cook County
Emergency services Birthing friendly

Presence Saints Mary And Elizabeth Medical Center

Acute Care Hospitals · Chicago, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140180
Location2233 W Division StChicago, IL 60622 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60625 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ASHWIN SHETTY MD
Internal Medicine (Nephrology)
5140 N CALIFORNIA AVE STE 600
CHICAGO, IL 60625
Cook County (708) 252-5809
DR. BRENDAN GILMORE M.D.
Internal Medicine (Hematology & Oncology)
5140 N CALIFORNIA AVE STE 600
CHICAGO, IL 60625
Cook County (773) 989-3803
MS. ELYSE A LAMBIASE MD
Internal Medicine (Medical Oncology)
5140 N CALIFORNIA AVE STE 600
CHICAGO, IL 60625
Cook County (773) 989-3803

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Ludwig's NPI number?

The NPI number for John Ludwig is 1215342449. It was assigned to this individual provider in the NPPES registry on June 26, 2014.

Where is John Ludwig located?

John Ludwig practices at 5140 N California Ave Ste 600, Chicago, IL 60625. The listed phone number is (708) 252-5809.

What is John Ludwig's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is John Ludwig enrolled in Medicare?

Yes. John Ludwig is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for John Ludwig's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Ludwig reassigns Medicare benefits to Nephrology Associates Of Northern Illinois, Ltd. (Oak Brook, IL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Ludwig's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does John Ludwig accept?

Health plans from Ambetter Health and Oscar Health list John Ludwig as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is John Ludwig affiliated with any hospitals?

According to CMS data, John Ludwig is affiliated with Northshore University Healthsystem - Evanston Hospital, Presence Saint Francis Hospital, Swedish Hospital and Presence Saints Mary And Elizabeth Medical Center.

When was this NPI record last updated?

The NPPES record for John Ludwig was last updated on April 12, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.