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Test Code CTBBLM Mycobacterial Culture, Blood

Additional Codes







Reporting Name

Mycobacterial Culture, B

Useful For

Diagnosing mycobacteremia

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
ISMY ID by 16S Sequencing No, (Bill Only) No
RMALM Id MALDI-TOF Mass Spec AFB No, (Bill Only) No
RTBSP Id, Mtb Speciation, PCR No, (Bill Only) No
TBMP Mycobacteria Probe Ident No, (Bill Only) No
TBPB Mycobacteria Probe Ident Broth No, (Bill Only) No

Testing Algorithm

When this test is ordered, the reflex tests may be performed and charged.

Method Name

Continuously Monitored Automated Broth Culture Instrument with Conventional Methods for Identification of Mycobacteria

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Whole blood

Shipping Instructions

Specimen must be processed within 72 hours of draw.

Necessary Information

Specimen source is required.

Specimen Required


Preferred: Green top (sodium or lithium heparin)

Acceptable: SPS/Isolator System

Specimen Volume: 10 mL per culture

Collection Instructions:

1. Send specimen in original tube.

2. Please note when sending SPS tube, it must be clearly labeled SPS. If label is obscured, sample may be cancelled as ACD (yellow top) is not an acceptable tube type.

Specimen Minimum Volume

5 mL

Specimen Stability Information

Specimen Type Temperature Time
Whole blood Ambient (preferred) 72 hours
  Refrigerated  72 hours

Reject Due To








Anticoagulants other than heparin or Sodium polyanethole sulfonate (SPS), ACD tube

Reference Values


If positive, mycobacteria is identified.

A final negative report will be issued after 42 days of incubation.

Day(s) and Time(s) Performed

Monday through Sunday; Continuously

CPT Code Information

87116-Mycobacterial Culture

87118-Id MALDI-TOF Mass Spec AFB (if appropriate)

87150-Id, Mtb Speciation, PCR (if appropriate)

87150-Mycobacteria Probe Ident, Broth(if appropriate)

87150-Mycobacteria Probe Ident, Solid(if appropriate) 

87153-Mtb PZA Confirmation, pcnA sequence (if appropriate)

87153-Mycobacteria Identification by Sequencing (if appropriate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CTBBL Mycobacterial Culture, B 64412-0


Result ID Test Result Name Result LOINC Value
CTBBL Mycobacterial Culture, B 64412-0

Test Classification

This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

Analytic Time

42 days/Positive cultures reported as soon as detected, Negative 42 days


If not ordering electronically, complete, print, and send a Microbiology Test Request Form (T244) with the specimen (