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Official Description

Special stain including interpretation and report; Group I for microorganisms (eg, acid fast, methenamine silver)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Special staining techniques are essential laboratory procedures used to enhance the visualization of microorganisms or specific cell and tissue structures that may not be easily identifiable through standard staining methods. The process begins with the fixation of the specimen, which is crucial for preserving the internal architecture of the organism, cell, or tissue. This fixation can be achieved using chemical fixatives or by freezing the specimen, both of which serve to prevent degradation and maintain structural integrity. When dealing with tissue samples, the specimen undergoes preparation for slicing, which involves cutting the tissue into extremely thin sections using a specialized instrument known as a vibratome. Following this preparation, the specimen is subjected to a series of treatments with various reagents, solutions, and stains that are specifically formulated to accentuate particular features or components of the microorganisms, cells, or tissues being studied. Once the staining process is complete, the specimen is examined under a microscope, allowing for detailed observation of the stained structures. The results of this examination are then interpreted, and a comprehensive written report detailing the findings is generated. For coding purposes, CPT® Code 88312 is designated for Group I special stains specifically aimed at microorganisms, while CPT® Code 88313 is reserved for Group II special stains applicable to all other specimens, excluding those for microorganisms, enzyme constituents, and immunohistochemistry.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

Special stains are performed for various indications, particularly when there is a need to identify or confirm the presence of specific microorganisms or to visualize particular cellular components that are not readily apparent with standard staining techniques. The following are the primary indications for utilizing CPT® Code 88312:

  • Microorganism Identification Special stains are indicated for the detection and identification of microorganisms, such as bacteria and fungi, which may require specific staining techniques to be visualized effectively.
  • Pathological Evaluation These stains are used in the pathological evaluation of tissue samples to highlight abnormal cellular structures or to assist in diagnosing diseases.
  • Research Purposes Special stains may also be employed in research settings to study the morphology and characteristics of various microorganisms or cellular components.

2. Procedure

The procedure for performing special stains, as described under CPT® Code 88312, involves several critical steps that ensure accurate visualization and interpretation of the specimen. The following outlines the procedural steps:

  • Step 1: Specimen Fixation The first step in the staining process is the fixation of the specimen. This is achieved either through the application of chemical fixatives or by freezing the specimen. Fixation is vital as it preserves the internal structure of the microorganisms, cells, or tissues, preventing any damage that could occur during subsequent processing.
  • Step 2: Tissue Preparation If the specimen is tissue, it must be prepared for slicing. This involves embedding the tissue in a medium that allows for thin sectioning. The tissue is then sliced into very thin sections using a vibratome, which is essential for obtaining the necessary thickness for effective staining and visualization.
  • Step 3: Staining Process After preparation, the specimen is treated with a variety of reagents, solutions, and stains. Each of these components is specifically chosen to highlight certain features or components of the microorganisms, cells, or tissues. The choice of stains is critical, as different stains will react with different cellular components, providing valuable information about the specimen.
  • Step 4: Microscopic Examination Once the staining is complete, the specimen is examined under a microscope. This examination allows for detailed observation of the stained structures, enabling the identification of microorganisms or specific cellular features.
  • Step 5: Interpretation and Reporting Finally, the results of the microscopic examination are interpreted, and a written report of the findings is generated. This report is crucial for clinical decision-making and further diagnostic processes.

3. Post-Procedure

Post-procedure care following the special staining process primarily involves the proper handling and storage of the stained specimens and the generated reports. It is essential to ensure that the specimens are preserved appropriately to maintain the integrity of the staining results for future reference or additional analysis. The written report detailing the findings should be reviewed by the appropriate medical personnel to facilitate accurate diagnosis and treatment planning. Additionally, any necessary follow-up procedures or tests should be considered based on the findings reported.

Short Descr SPECIAL STAINS GROUP 1
Medium Descr SPECIAL STAIN GROUP 1 MICROORGANISMS I&R
Long Descr Special stain including interpretation and report; Group I for microorganisms (eg, acid fast, methenamine silver)
Status Code Active Code
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 1 - Diagnostic Tests for Radiology Services
Multiple Procedures (51) 0 - No payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 0 - Payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator STV-Packaged Codes
Type of Service (TOS) 5 - Diagnostic Laboratory
Berenson-Eggers TOS (BETOS) T1G - Lab tests - other (Medicare fee schedule)
MUE 9
CCS Clinical Classification 234 - Pathology

This is a primary code that can be used with these additional add-on codes.

0756T Add-on Code MPFS Status: Carrier Priced APC N Digitization of glass microscope slides for special stain, including interpretation and report, group I, for microorganisms (eg, acid fast, methenamine silver) (List separately in addition to code for primary procedure)
26 Professional component: certain procedures are a combination of a physician or other qualified health care professional component and a technical component. when the physician or other qualified health care professional component is reported separately, the service may be identified by adding modifier 26 to the usual procedure number.
TC Technical component; under certain circumstances, a charge may be made for the technical component alone; under those circumstances the technical component charge is identified by adding modifier 'tc' to the usual procedure number; technical component charges are institutional charges and not billed separately by physicians; however, portable x-ray suppliers only bill for technical component and should utilize modifier tc; the charge data from portable x-ray suppliers will then be used to build customary and prevailing profiles
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
GC This service has been performed in part by a resident under the direction of a teaching physician
X5 Diagnostic services requested by another clinician: for reporting services by a clinician who furnishes care to the patient only as requested by another clinician or subsequent and related services requested by another clinician; this modifier is reported for patient relationships that may not be adequately captured by the above alternative categories; reporting clinician service examples include but are not limited to, the radiologist's interpretation of an imaging study requested by another clinician
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
GW Service not related to the hospice patient's terminal condition
90 Reference (outside) laboratory: when laboratory procedures are performed by a party other than the treating or reporting physician or other qualified health care professional, the procedure may be identified by adding modifier 90 to the usual procedure number.
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
91 Repeat clinical diagnostic laboratory test: in the course of treatment of the patient, it may be necessary to repeat the same laboratory test on the same day to obtain subsequent (multiple) test results. under these circumstances, the laboratory test performed can be identified by its usual procedure number and the addition of modifier 91. note: this modifier may not be used when tests are rerun to confirm initial results; due to testing problems with specimens or equipment; or for any other reason when a normal, one-time, reportable result is all that is required. this modifier may not be used when other code(s) describe a series of test results (eg, glucose tolerance tests, evocative/suppression testing). this modifier may only be used for laboratory test(s) performed more than once on the same day on the same patient.
TA Left foot, great toe
CR Catastrophe/disaster related
XP Separate practitioner, a service that is distinct because it was performed by a different practitioner
T5 Right foot, great toe
T1 Left foot, second digit
Q5 Service furnished under a reciprocal billing arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
T6 Right foot, second digit
77 Repeat procedure by another physician or other qualified health care professional: it may be necessary to indicate that a basic procedure or service was repeated by another physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 77 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
GZ Item or service expected to be denied as not reasonable and necessary
T4 Left foot, fifth digit
T7 Right foot, third digit
T9 Right foot, fifth digit
X2 Continuous/focused services: for reporting services by clinicians whose expertise is needed for the ongoing management of a chronic disease or a condition that needs to be managed and followed with no planned endpoint to the relationship; reporting clinician service examples include but are not limited to: a rheumatologist taking care of the patient's rheumatoid arthritis longitudinally but not providing general primary care services
32 Mandated services: services related to mandated consultation and/or related services (eg, third party payer, governmental, legislative or regulatory requirement) may be identified by adding modifier 32 to the basic procedure.
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
73 Discontinued out-patient hospital/ambulatory surgery center (asc) procedure prior to the administration of anesthesia: due to extenuating circumstances or those that threaten the well being of the patient, the physician may cancel a surgical or diagnostic procedure subsequent to the patient's surgical preparation (including sedation when provided, and being taken to the room where the procedure is to be performed), but prior to the administration of anesthesia (local, regional block(s) or general). under these circumstances, the intended service that is prepared for but cancelled can be reported by its usual procedure number and the addition of modifier 73. note: the elective cancellation of a service prior to the administration of anesthesia and/or surgical preparation of the patient should not be reported. for physician reporting of a discontinued procedure, see modifier 53.
78 Unplanned return to the operating/procedure room by the same physician or other qualified health care professional following initial procedure for a related procedure during the postoperative period: it may be necessary to indicate that another procedure was performed during the postoperative period of the initial procedure (unplanned procedure following initial procedure). when this procedure is related to the first, and requires the use of an operating/procedure room, it may be reported by adding modifier 78 to the related procedure. (for repeat procedures, see modifier 76.)
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
GA Waiver of liability statement issued as required by payer policy, individual case
KX Requirements specified in the medical policy have been met
LT Left side (used to identify procedures performed on the left side of the body)
PA Surgical or other invasive procedure on wrong body part
PC Wrong surgery or other invasive procedure on patient
PD Diagnostic or related non diagnostic item or service provided in a wholly owned or operated entity to a patient who is admitted as an inpatient within 3 days
PT Colorectal cancer screening test; converted to diagnostic test or other procedure
Q0 Investigational clinical service provided in a clinical research study that is in an approved clinical research study
QJ Services/items provided to a prisoner or patient in state or local custody, however the state or local government, as applicable, meets the requirements in 42 cfr 411.4 (b)
RT Right side (used to identify procedures performed on the right side of the body)
ST Related to trauma or injury
T2 Left foot, third digit
T3 Left foot, fourth digit
T8 Right foot, fourth digit
X1 Continuous/broad services: for reporting services by clinicians, who provide the principal care for a patient, with no planned endpoint of the relationship; services in this category represent comprehensive care, dealing with the entire scope of patient problems, either directly or in a care coordination role; reporting clinician service examples include, but are not limited to: primary care, and clinicians providing comprehensive care to patients in addition to specialty care
X3 Episodic/broad services: for reporting services by clinicians who have broad responsibility for the comprehensive needs of the patient that is limited to a defined period and circumstance such as a hospitalization; reporting clinician service examples include but are not limited to the hospitalist's services rendered providing comprehensive and general care to a patient while admitted to the hospital
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
Date
Action
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2012-01-01 Changed Description Changed
2011-01-01 Changed Short description changed.
2010-01-01 Changed Code description changed.
2004-01-01 Changed Code description changed.
Pre-1990 Added Code added.
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