Dr. Mark W Johnson, MD
Dr. Mark W Johnson is a Clinical Pathology/Laboratory Medicine Physician provider (Pathology) practicing in Sioux Falls, SD, registered in the NPPES registry with NPI 1558347765 since 2005. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1558347765 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Mark W Johnson |
| Credential | MD |
| Sex | Male |
| Practice address | 1305 W 18TH ST, Sioux Falls, SD, 57105 |
| Phone | 6053331720 |
| Fax | 6053331966 |
| Enumeration date | 2005-12-20 |
| Last updated in NPPES | 2022-01-26 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207ZP0102X | Anatomic Pathology & Clinical Pathology Physician | Secondary | 3451 | SD |
| 207ZP0105X | Clinical Pathology/Laboratory Medicine Physician | Primary | 3451 | SD |
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 |
|---|---|---|---|
| 220017379 | Other | — | RAILROAD |
Copy-ready billing details
Provider: Mark Johnson, MD NPI: 1558347765 Taxonomy: 207ZP0105X (Clinical Pathology/Laboratory Medicine Physician) Address: 1305 W 18TH ST, Sioux Falls, SD, 57105
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1558366500 | Scott Pham | Individual | Clinical Cardiac Electrophysiology Physician | Sioux Falls, SD |
| 1841295722 | Michael Wilde | Individual | Hospitalist Physician | Sioux Falls, SD |
| 1215932116 | Paul Aspaas | Individual | Internal Medicine Physician | Sioux Falls, SD |
| 1124023171 | Charles O'Brien | Individual | Internal Medicine Physician | Sioux Falls, SD |
| 1508861329 | Daniel Heinemann | Individual | Family Medicine Physician | Sioux Falls, SD |
| 1497752810 | Geoffrey Haft | Individual | Orthopaedic Surgery Physician | Sioux Falls, SD |
| 1053311597 | Select Specialty Hospital - Sioux Falls Inc | Organization | Long Term Care Hospital | Sioux Falls, SD |
| 1326048760 | Donald Ellis | Individual | Emergency Medicine Physician | Sioux Falls, SD |
Verify this record
Cross-check NPI 1558347765 against the authoritative CMS record: view Dr. Mark W 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
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2022-01-26.