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

Dr. Carl R Johnson, M.D.

Internal Medicine Physician in Mattoon, IL · enumerated 2005 · practices at Urology Associates, S.C..

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

National Provider Identifier

1275525701

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Registry record

Entity type Individual (Type 1)

Name Dr. Carl R Johnson

Credential M.D.

Sex Male

Practice address Mattoon, IL, 61938

Phone (217) 258-4080

Fax (217) 258-4084

Enumeration date Aug 19, 2005

Last updated in NPPES Jan 27, 2015

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036057126 (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
036057126	Medicaid	IL	-
170490	Other	IL	PERSONALCARE HMO
0001520105	Other	IL	BLUE CROSS BLUE SHIELD

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Carl Johnson?

Carl Johnson is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Roger Rives Urology Physician · Mattoon, IL NPI 1861416372 Urology Associates, S.C. Physician Assistant · Mattoon, IL NPI 1427066018 Gaylin Lack Orthopaedic Surgery Physician · Mattoon, IL NPI 1881700714

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-01-27.