STL DIAGNOSTIC LLC
STL DIAGNOSTIC LLC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003406232, based in Saint Louis, MO. It is classified under Clinical Medical Laboratory.
Getting there
Here is what surrounds this office in Saint Louis, based on OpenStreetMap data collected Sep 24, 2026. Parking is available about 0.27 mi away. The nearest transit stop is 755 ft away, served by Chippewa at Hereford. A pharmacy sits 0.39 mi from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.39 mi away.
Getting here and what is nearby
Transit Chippewa at Brannon Eastbound 56 ft ~1 min
Transit Chippewa at Brannon Westbound 91 ft ~1 min
Transit Chippewa at Hereford 755 ft ~3 min
Convenience 7-Eleven 1,027 ft ~4 min
Gas station Conoco 1,028 ft ~4 min
Parking 0.20 mi ~4 min
Restaurant Miami Grill 0.20 mi ~4 min
Parking 0.23 mi ~5 min
Restaurant Domino's 0.26 mi ~6 min
5421 Chippewa Street, Saint Louis 63109
Mo-Th 10:00-24:00; Fr-Sa 10:00-01:00; Su 10:00-24:00
Parking 0.27 mi ~6 min
Restaurant Jack in the Box 0.31 mi ~7 min
4201 South Kingshighway Boulevard, Saint Louis 63109
24/7
Gas station BP 0.32 mi ~7 min
Convenience Zamani Gasmart 0.33 mi ~7 min
Coffee Piper’s Tea & Coffee 0.38 mi ~8 min
Coffee Starbucks 0.39 mi ~8 min
3700 South Kingshighway Boulevard, Saint Louis 63109
Mo-Fr 05:00-19:30, Sa-Su 05:30-19:30
Pharmacy Walgreens 0.39 mi ~8 min
3822 South Kingshighway Boulevard, Saint Louis 63109
Su-Sa 08:00-22:00
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Clinical Medical Laboratory covers
(1) A clinical laboratory is a facility for the biological, microbiological, serological, chemical, immunohematological, hematological, biophysical, cytological, pathological, or other examination of materials derived from the human body for the purpose of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, human beings. These examinations also include procedures to determine, measure, or otherwise describe the presence or absence of various substances or organisms in the body. Facilities only collecting or preparing specimens (or both) or only serving as a mailing service and not performing testing are not considered clinical laboratories. (2) Any facility that examines materials from the human body for purposes of providing information for the diagnosis, prevention, or treatment of any disease or impairment of, or the assessment of, the health of human beings. Typical divisions of a clinical laboratory include hematology, cytology, bacteriology, histology, biochemistry, medical toxicology, and serology. NUCC Health Care Provider Taxonomy, code 291U00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1003406232 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Jan 21, 2021 |
| Last updated | Jan 21, 2021 |
| Status | Active |
| Practice address |
5203 CHIPPEWA ST STE 200 Saint Louis, MO 63109 (314) 349-2869 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 4 | 0 | 6 | 2 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 0 | 3 | 2 | 6 |
Sum = 48 · next multiple of 10 = 50 · check digit = 2 · actual last digit = 2
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.