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Official Description

Gonadotropin; follicle stimulating hormone (FSH)

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 83001 refers to the laboratory test for gonadotropin, specifically measuring follicle stimulating hormone (FSH). This test can be conducted using either a blood or urine sample to determine the presence and levels of FSH in the body. FSH is one of the key gonadotropins produced by the pituitary gland, which plays a crucial role in the growth and functioning of the gonads, or sex organs. These hormones are vital for the development of eggs in females and sperm in males, as well as for the emergence of secondary sexual characteristics such as voice changes, muscle growth, hair distribution, and breast development. In females, FSH works in conjunction with luteinizing hormone (LH) to stimulate the maturation of the graafian follicle and trigger ovulation. In males, LH is responsible for stimulating testosterone production, while FSH is essential for sperm production. The measurement of serum FSH and LH levels is commonly utilized in the evaluation of infertility issues in both genders. Additionally, these hormone levels are instrumental in investigating menstrual irregularities, diagnosing disorders related to the pituitary gland, and assessing conditions affecting the ovaries or testes. They are also used to identify cases of delayed or precocious puberty. The testing for serum FSH and LH levels is typically performed using an electrochemiluminescent immunoassay, a sensitive and specific method for hormone detection.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The test for follicle stimulating hormone (FSH) is indicated for various clinical scenarios, particularly in the assessment of reproductive health and hormonal balance. The following conditions may warrant the measurement of FSH levels:

  • Infertility Evaluation - FSH levels are assessed in both men and women to investigate potential causes of infertility.
  • Menstrual Irregularities - The test helps in diagnosing issues related to irregular menstrual cycles in females.
  • Disorders of the Pituitary Gland - FSH testing can aid in identifying dysfunctions of the pituitary gland that may affect hormone production.
  • Ovarian or Testicular Diseases - The measurement of FSH is useful in diagnosing conditions affecting the ovaries in females or the testes in males.
  • Delayed or Precocious Puberty - FSH levels are evaluated to diagnose cases of delayed or early onset of puberty in children.

2. Procedure

The procedure for measuring follicle stimulating hormone (FSH) involves several key steps to ensure accurate results. The following outlines the procedural steps:

  • Step 1: Sample Collection - A blood sample is typically drawn from a vein in the arm using a sterile needle. In some cases, a urine sample may be collected, particularly for LH testing. Proper collection techniques are essential to avoid contamination and ensure the integrity of the sample.
  • Step 2: Sample Preparation - Once collected, the blood sample is processed in the laboratory. For blood samples, this may involve centrifugation to separate the serum from the blood cells. Urine samples may require specific handling to ensure accurate measurement of hormone levels.
  • Step 3: Testing Methodology - The serum or urine sample is then subjected to an electrochemiluminescent immunoassay, a highly sensitive and specific testing method that quantifies the levels of FSH. This method utilizes antibodies that specifically bind to FSH, allowing for precise measurement.
  • Step 4: Result Interpretation - After the assay is completed, the results are analyzed and interpreted by laboratory professionals. The FSH levels are compared against established reference ranges to determine if they are within normal limits or indicative of a potential disorder.

3. Post-Procedure

After the procedure, patients may experience minimal discomfort at the site of blood draw, which typically resolves quickly. There are no specific post-procedure care instructions required for FSH testing. However, patients should be informed that results will be communicated to their healthcare provider, who will discuss the findings and any necessary follow-up actions based on the results. It is important for patients to understand that FSH levels can fluctuate based on various factors, including the phase of the menstrual cycle in females, and should be interpreted in conjunction with other clinical information.

Short Descr ASSAY OF GONADOTROPIN (FSH)
Medium Descr GONADOTROPIN FOLLICLE STIMULATING HORMONE
Long Descr Gonadotropin; follicle stimulating hormone (FSH)
Status Code Statutory Exclusion (from MPFS, may be paid under other methodologies)
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 9 - Not Applicable
Multiple Procedures (51) 9 - Concept does not apply.
Bilateral Surgery (50) 9 - Concept does not apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 9 - Concept does not apply.
Co-Surgeons (62) 9 - Concept does not apply.
Team Surgery (66) 9 - Concept does not apply.
Diagnostic Imaging Family 99 - Concept Does Not Apply
CLIA Waived (QW) Yes
APC Status Indicator Conditionally packaged laboratory tests
Type of Service (TOS) 5 - Diagnostic Laboratory
Berenson-Eggers TOS (BETOS) T1H - Lab tests - other (non-Medicare fee schedule)
MUE 1
CCS Clinical Classification 233 - Laboratory - Chemistry and Hematology
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.
QW Clia waived test
GW Service not related to the hospice patient's terminal condition
GY Item or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit
GA Waiver of liability statement issued as required by payer policy, individual case
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.
Q4 Service for ordering/referring physician qualifies as a service exemption
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.
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.
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.
AY Item or service furnished to an esrd patient that is not for the treatment of esrd
CR Catastrophe/disaster related
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
GX Notice of liability issued, voluntary under payer policy
GZ Item or service expected to be denied as not reasonable and necessary
Q1 Routine 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)
SA Nurse practitioner rendering service in collaboration with a physician
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
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2013-01-01 Changed Short Descriptor changed.
Pre-1990 Added Code added.
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