JAMES P. LASH
NPI 1548365646
Internal Medicine - Nephrology in Chicago, IL
About James P. Lash NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JAMES P. LASH (NPI 1548365646) is an individual nephrology provider in Chicago, Illinois, licensed in Illinois (036065527) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with University Of Illinois Hospital And Clinics, and is a graduate of University Of Chicago, Pritzker School Of Medicine (1981).
NPPES Registry Identity
Specialties & Licenses 2
Accepted 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
James P. Lash 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.
Medicare Billing Reassignments
2Medicare enrollment records show James Lash reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago, IL 60612
- Reassigned Medicare billing, Illinois enrollment
- 2,127 clinicians in this Medicare group
Chicago, IL 60612
- Reassigned Medicare billing, Illinois enrollment
- 1,047 clinicians in this Medicare group
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 4
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Illinois Hospital And Clinics
Acute Care Hospitals · Chicago, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60612 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHICAGO, IL 60612
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 James Lash's NPI number?
The NPI number for James Lash is 1548365646. It was assigned to this individual provider in the NPPES registry on September 13, 2006.
Where is James Lash located?
James Lash practices at 1740 W Taylor St, Chicago, IL 60612. The listed phone number is (866) 600-2273.
What is James Lash's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is James Lash enrolled in Medicare?
Yes. James Lash 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 organizations bill Medicare for James Lash's services?
According to the CMS Revalidation Reassignment List (October 2026 release), James Lash reassigns Medicare benefits to 2 organizations: Board Of Trustees Of The University Of Illinois (Chicago, IL) and Cook County (Chicago, IL). Each 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 James Lash's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does James Lash accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list James Lash 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 James Lash affiliated with any hospitals?
According to CMS data, James Lash is affiliated with University Of Illinois Hospital And Clinics.
When was this NPI record last updated?
The NPPES record for James Lash was last updated on April 26, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# James P. Lash · NPI 1548365646
Nephrology physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since September 13, 2006.
## Identity
- **NPI:** 1548365646 (Entity type: Individual)
- **Enumerated:** September 13, 2006
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** 036065527 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 1740 W TAYLOR ST, Chicago, IL 60612-7232
- **Phone:** (866) 600-2273
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Board Of Trustees Of The University Of Illinois (NPI 1013136282, Chicago, IL); Cook County (NPI 1912063439, Chicago, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Chicago, Pritzker School Of Medicine, class of 1981
## Record status
- **NPPES last updated:** April 26, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1548365646) · Data from the CMS NPPES public registry.