Effective/Publication Date: 05/26/2006
[Federal Register: (Volume 71, Number 102), Page 30467-30469]
To provide guidance on the types of impairments that may result from tremolite asbestos exposure and how to evaluate disability claims under titles II and XVI of the Social Security Act (the Act) based on these impairments.
Sections 216(i), 223(d), 223(f), 1614(a)(3), and 1614(a)(4) of the Social Security Act, as amended; Regulations No. 4, subpart P, sections 404.1502, 404.1505, 404.1508-404.1513, 404.1519-1523, 404.1525-404.1529, 404.1545, 404.1560-404.1569a*, 404.1593-404.1594, and appendix 1; and Regulations No. 16, subpart I, sections 416.902, 416.905, 416.906, 416.908-416.913, 416.919, 416.920, 416.921-416.929, 416.945, 416.960-416.969a, 416.993-416.994a.
Tremolite is a type of asbestos sometimes found in the mineral vermiculite. People may be exposed to tremolite from vermiculite in mining and in work-related activities involving the production of horticultural and agricultural items, construction and insulation materials, brake pads, and other items. People may also be exposed to tremolite from living in an area where such mining or activities occur or from products made from vermiculite. Exposure** to tremolite asbestos has occurred in the Libby, Montana area and may have occurred in other areas as well.
This ruling explains how we determine if impairments that may be caused by exposure to tremolite asbestos meet our definition of disability. Sections 216(i) and 1614(a)(3) of the Act define “disability” as the inability to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment (or combination of impairments) which can be expected to result in death or which has lasted or can be expected to last for a continuous period of not less than 12 months.
When tremolite asbestos is inhaled, it penetrates the lung tissue by piercing the walls of the alveolar sacs and permanently lodges in the pleural lining. The tremolite accumulates in the pleural lining, and the affected lung and pleural areas become inflamed and scarred. This process may eventually result in chronic pulmonary insufficiency, such as asbestosis, disorders of pulmonary circulation, pleural plaques, pleural thickening, or pleural effusions. These impairments can interfere with the lungs' ability to exchange oxygen and carbon dioxide and can cause difficulty breathing by interfering with the lungs' ability to expand and contract normally. Decrease in blood flow to the lungs can result in prolonged right pulmonary artery hypertension, enlargement of the heart, and failure of the right ventricle (cor pulmonale).
Inhalation of tremolite asbestos can also cause several types of cancers, primarily malignant mesothelioma of the pleura and bronchogenic carcinoma of the lung.
Some factors that increase the chances of developing these impairments include increased length of exposure to tremolite asbestos, multiple routes of exposure to tremolite asbestos (for example occupational contact and household contact), and smoking.
As with all impairments, we follow the five-step sequential evaluation process in 20 CFR 404.1520 and 416.920 when we determine whether an individual is disabled.
Step 1. We first determine whether the individual is working and whether the work is substantial gainful activity (SGA). If the individual is working and the work is SGA, we will find that the individual is not disabled, regardless of the individual's medical condition, age, education, and work experience. If the individual is not engaging in SGA, we go on to the next step.
Step 2. If the individual is not working or the work is not SGA, we then establish whether the individual has a medically determinable impairment that is “severe.”
The presence of chronic pulmonary insufficiency is established based on the individual's medical history, findings from a physical examination(s), and spirometric pulmonary function tests. Chest x-rays or other appropriate radiographic imaging techniques (for example, a computerized axial tomography (CAT) scan) are often performed to support the presence of the impairment. Measurement of diffusing capacity of the lungs for carbon monoxide (DLCO), pulse oximetry, or resting or exercise arterial blood gas studies (ABGS) may be performed to determine if the impairment has resulted in gas exchange abnormalities. In disorders of pulmonary circulation, a direct measurement of pulmonary artery pressure may have been obtained with right heart catheterization.
Malignant mesothelioma and bronchogenic carcinoma are demonstrated by tissue biopsy. When a biopsy is performed, we generally need a copy of both the operative note and pathology report. If we cannot get these documents, we will accept the summary of hospitalization(s) or other medical reports. This evidence should include details of the findings at surgery and, whenever appropriate, the pathological findings.
Once we determine that an impairment(s) exists, we evaluate its severity. As with any other medical condition, we will find that an impairment(s) caused by exposure to tremolite is a “severe” impairment(s) when, alone or in combination with another medically determinable physical or mental impairment(s), it significantly limits an individual's physical or mental ability to do basic work activities. When making a determination about whether an impairment(s) is severe, we will consider the effects of any symptoms (such as chest pain or complaints of shortness of breath on exertion) that could limit functioning. We also recognize that limitations from impairments caused by exposure to tremolite may be more significant than would be expected based on objective findings alone. We will find that an impairment(s) is “not severe” only if it is a slight abnormality (or a combination of slight abnormalities) that has no more than a minimal effect on the individual's ability to do basic work activities.
If the individual does not have a medically determinable impairment that is “severe,” we will find that the individual is not disabled. If the individual does have a “severe” impairment, we will go on to the next step.
Step 3. If an individual has a severe impairment(s), we next consider whether the impairment meets or medically equals a listing in the Listing of Impairments contained in appendix 1, subpart P of 20 CFR part 404.
Chronic Pulmonary Insufficiency: We evaluate chronic pulmonary insufficiency under listing 3.02. The listing contains criteria based on spirometry, single breath DLCO, or ABGS. Chronic pulmonary insufficiency caused by exposure to tremolite asbestos may not have findings at rest that satisfy these criteria. If exercise ABGS cannot be obtained in these situations, we evaluate the impairment(s) at step 4, and if necessary, step 5 of the sequential evaluation process.
Cancer: Malignant mesothelioma of the pleura meets listing 13.15A. Bronchogenic carcinoma meets listing 13.14A if it is inoperable, unresectable, recurrent, or has metastasized to or beyond the hilar nodes.
If the individual has an impairment(s) that meets or medically equals the criteria of one of the foregoing listings or any other listing and meets the duration requirement, we will find that the individual is disabled. If not, we will continue with the sequential evaluation process.
Residual Functional Capacity. If we find that the impairment(s) does not meet or medically equal a listing, or if we do not have enough information for a determination or decision at Step 3, we will assess the individual's residual functional capacity (RFC). We must consider all symptoms that result from the individual's impairments, including those symptoms that result from impairments that are not severe, when we evaluate how these symptoms affect the individual's functional capacity.
In addition, if the individual's treating source has provided an opinion about what the individual can still do despite his or her impairment, we will give this opinion controlling weight in determining the individual's RFC when the opinion is well-supported by objective medical evidence and is not inconsistent with the other substantial evidence in the case record. Even if the treating source's opinion is not given “controlling weight” (for example it is not well-supported by objective medical evidence), the opinion is still entitled to deference and must be weighed using all of the factors in 20 CFR 404.1527 and 416.927. In many cases, a treating source's medical opinion will be entitled to the greatest weight and should be adopted even if it does not meet the test for “controlling weight.”
Steps 4 and 5. After we determine the individual's RFC, we then proceed to the fourth and, if necessary, the fifth step of the sequential evaluation process. If the individual can do past relevant work, we will determine that the individual is not disabled (step 4). If we determine that the individual's impairment(s) precludes the performance of past relevant work or if there was no past relevant work, a finding must be made about the individual's ability to adjust to other work (step 5). The usual vocational considerations must be applied in determining the individual's ability to adjust to other work.
This Ruling is effective on the date of its publication in the Federal Register.
SSR 85-28, “Titles II and XVI: Medical Impairments That Are Not Severe,” SSR 96-2p, “Titles II and XVI: Giving Controlling Weight To Treating Source Medical Opinions,” SSR 96-3p, “Titles II and XVI: Considering Allegations of Pain and Other Symptoms in Determining Whether a Medically Determinable Impairment is Severe,” SSR 96-7p, “Titles II and XVI: Evaluation of Symptoms in Disability Claims: Assessing the Credibility of an Individual's Statements,” and SSR 96-8p, “Titles II and XVI: Assessing Residual Functional Capacity in Initial Claims.”
 For simplicity, we refer in this Ruling only to initial adult claims for disability benefits under titles II and XVI of the Act, and the steps of the sequential evaluation process we use to determine disability in those claims, 20 CFR 404.1520 and 416.920. We use a different sequential evaluation process for children who apply for benefits based on disability under title XVI of the Act. We describe that sequential evaluation process in 20 CFR 416.924. We also use separate sequential evaluation processes to determine whether an individual's disability has ended when we conduct continuing disability reviews and when we determine that an individual was disabled only for a specific period. These rules are set out in 20 CFR 404.1594, 416.994, and 416.994a. The guidance in this Ruling applies to all of the appropriate steps in those regulations as well.
 The term “we” in this Social Security Ruling has the same meaning as in 20 CFR 404.1502 and 416.902. “We” refers to either the Social Security Administration or the State agency making the disability determination; that is, our adjudicators at all levels of the administrative review process and our quality reviewers.
 Except for statutory blindness.
 For individuals under age 18 claiming benefits under title XVI, disability will be established if the individual has a medically determinable physical or mental impairment (or combination of impairments) that results in “marked and severe functional limitations.” See section 1614(a)(3)(C) of the Act and 20 CFR 416.906. However, for simplicity, the following discussions refer only to claims of individuals claiming disability benefits under title II and individuals age 18 or older claiming disability benefits under title XVI.
 With continuing scientific research, new medical information may emerge to further clarify the causes and nature of impairments related to tremolite asbestos exposure and to provide greater specificity for clinical and laboratory diagnostic techniques to document them.
 See SSR 85-28, “Titles II and XVI: Medical Impairments That Are Not Severe” and SSR 96-3p, “Titles II and XVI: Considering Allegations of Pain and Other Symptoms In Determining Whether a Medically Determinable Impairment Is Severe.”
 See 20 CFR 404.1520(e) and 416.920(e).
 See SSR 96-7p, “Titles II and XVI: Evaluation of Symptoms in Disability Claims: Assessing the Credibility of an Individual's Statements” and SSR 96-8p, “Titles II and XVI: Assessing Residual Functional Capacity in Initial Claims.”
 See 20 CFR 404.1502 and 416.902.
 See 20 CFR 404.1527 and 416.927; SSR 96-2p, “Titles II and XVI: Giving Controlling Weight To Treating Source Medical Opinions.”
 See 404.1545 and 416.945
 See 20 CFR 404.1560-404.1569a and 416.960-416.969a.
* FR Vol. 71, No. 110, p. 33342 (June 8, 2006) changed this from "404.1560-404/1569a" to "404.1560-404.1569a".
** FR Vol. 71, No. 110, p. 33342 (June 8, 2006) changed this from "exposure" to "Exposure".
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