Mark R Johnson, M.D.

Mark R Johnson is a Pediatric Pulmonology Physician provider (Pediatrics) practicing in Springfield, IL, registered in the NPPES registry with NPI 1205811775 since 2005. The credential MD stands for Doctor of Medicine.

✓ Active NPI ✓ Valid NPI checksum

NPI	1205811775
Entity type	Individual (Type 1)
Name	Mark R Johnson
Credential	M.D.
Sex	Male
Practice address	301 N 8TH ST, Springfield, IL, 62701
Phone	2175450702
Fax	2175455834
Enumeration date	2005-12-07
Last updated in NPPES	2020-11-17

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
2080P0214X	Pediatric Pulmonology Physician	Primary	036-093433	IL

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
036093433	Medicaid	IL	—

Copy-ready billing details

Provider: Mark Johnson, M.D.
NPI: 1205811775
Taxonomy: 2080P0214X (Pediatric Pulmonology Physician)
Address: 301 N 8TH ST, Springfield, IL, 62701

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1578565420	Samuel Au	Individual	Radiation Oncology Physician	Springfield, IL
1700871571	Carol Bauer	Individual	Otolaryngology Physician	Springfield, IL
1871588640	Horst Konrad	Individual	Otolaryngology Physician	Springfield, IL
1609861426	Phillip Myers	Individual	Otolaryngology Physician	Springfield, IL
1477549905	Kevin Robbins	Individual	Otolaryngology Physician	Springfield, IL
1609862200	Richard Bass	Individual	Otolaryngology Physician	Springfield, IL
1184610255	Ruth Mayforth	Individual	Pediatric Surgery Physician	Springfield, IL
1154317113	John Fisk	Individual	Orthopaedic Surgery Physician	Springfield, IL

Verify this record

Cross-check NPI 1205811775 against the authoritative CMS record: view Mark R Johnson on the official NPPES registry .

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. Read the full guide or validate an NPI number.

Frequently asked questions

Is NPI 1205811775 active?

Yes — as of the latest NPPES snapshot, NPI 1205811775 is active (record last updated 2020-11-17).

How do I verify Mark Johnson's NPI record?

Cross-check NPI 1205811775 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2020-11-17.