Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

James R Diesfeld, M.D.

Interventional Pain Medicine Physician in Chicago, IL · enumerated 2005 · practices at Chicago Pain Medicine Center.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1497753214

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Registry record

Entity type Individual (Type 1)

Name James R Diesfeld

Credential M.D.

Sex Male

Practice address Chicago, IL, 60622

Phone (773) 868-6824

Fax (773) 868-6828

Enumeration date Jul 14, 2005

Last updated in NPPES May 20, 2022

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

332B00000X Durable Medical Equipment & Medical Supplies Suppliers Secondary

208VP0014X Interventional Pain Medicine Physician Allopathic & Osteopathic Physicians · License 036086023 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
01605512	Other	IL	BLUE SHIELD OF ILLINOIS
036086023	Medicaid	IL	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How do I verify James Diesfeld's NPI record?

Cross-check NPI 1497753214 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1497753214 active?

Yes, as of the latest NPPES snapshot, NPI 1497753214 is active (record last updated 2022-05-20).

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Chicago Pain Medicine Center Interventional Pain Medicine Physician · Chicago, IL NPI 1669429890

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-05-20.