MEMORANDUM OPINION GRANTING PLAINTIFF'S ALTERNATIVE MOTION FOR REMAND

THOMAS M. DiGIROLAMO, Magistrate Judge.

Plaintiff Dwayne D. seeks judicial review under 42 U.S.C. §§ 405(g) and 1383(c)(3) of a final decision of the Commissioner of Social Security ("Defendant" or the "Commissioner") denying his applications for child's disability benefits and Supplemental Security Income under Titles II and XVI of the Social Security Act. Before the Court are Plaintiff's Motion for Summary Judgment and alternative motion for remand (ECF No. 13) and Defendant's Motion for Summary Judgment (ECF No. 18).2 Plaintiff contends that the administrative record does not contain substantial evidence to support the Commissioner's decision that he is not disabled. No hearing is necessary. L.R. 105.6. For the reasons that follow, Plaintiff's alternative motion for remand (ECF No. 13) is GRANTED.

I

Background

On November 15, 2016, Administrative Law Judge ("ALJ") Michael A. Krasnow held a hearing in Washington, D.C., where Plaintiff and a vocational expert ("VE") testified. R. at 15, 39-75. The ALJ thereafter found on December 2, 2016, that Plaintiff was not disabled from his alleged onset date of disability of October 29, 2007, through the date of the ALJ's decision. R. at 12-32. In so finding, the ALJ found that, with regard to concentration, persistence, or pace, Plaintiff had moderate difficulties. R. at 19. The ALJ then found that Plaintiff had the residual functional capacity ("RFC")

R. at 20. In light of this RFC and the VE's testimony, the ALJ found that Plaintiff was capable of performing work such as a church janitor, kitchen helper and dishwasher, or merchandise marker. R at 26. The ALJ thus found that Plaintiff was not disabled from October 29, 2007, through December 2, 2016. R. at 26-27.

After the Appeals Council denied Plaintiff's request for review, Plaintiff filed on December 27, 2017, a complaint in this Court seeking review of the Commissioner's decision. Upon the parties' consent, this case was transferred to a United States Magistrate Judge for final disposition and entry of judgment. The case then was reassigned to the undersigned. The parties have briefed the issues, and the matter is now fully submitted.

II

Disability Determinations and Burden of Proof

The Social Security Act defines a disability as the inability to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment that can be expected to result in death or that has lasted or can be expected to last for a continuous period of not less than twelve months. 42 U.S.C. §§ 423(d)(1)(A), 1382c(a)(3)(A); 20 C.F.R. §§ 404.1505, 416.905. A claimant has a disability when the claimant is "not only unable to do his previous work but cannot, considering his age, education, and work experience, engage in any other kind of substantial gainful work which exists . . . in significant numbers either in the region where such individual lives or in several regions of the country." 42 U.S.C. §§ 423(d)(2)(A), 1382c(a)(3)(B).

To determine whether a claimant has a disability within the meaning of the Social Security Act, the Commissioner follows a five-step sequential evaluation process outlined in the regulations. 20 C.F.R. §§ 404.1520, 416.920; see Barnhart v. Thomas, 540 U.S. 20, 24-25, 124 S.Ct. 376, 379-80 (2003). "If at any step a finding of disability or nondisability can be made, the [Commissioner] will not review the claim further." Thomas, 540 U.S. at 24, 124 S. Ct. at 379; see 20 C.F.R. §§ 404.1520(a)(4), 416.920(a)(4). The claimant has the burden of production and proof at steps one through four. See Bowen v. Yuckert, 482 U.S. 137, 146 n.5, 107 S.Ct. 2287, 2294 n.5 (1987); Radford v. Colvin, 734 F.3d 288, 291 (4th Cir. 2013).

First, the Commissioner will consider a claimant's work activity. If the claimant is engaged in substantial gainful activity, then the claimant is not disabled. 20 C.F.R. §§ 404.1520(a)(4)(i), 416.920(a)(4)(i).

Second, if the claimant is not engaged in substantial gainful activity, the Commissioner looks to see whether the claimant has a "severe" impairment, i.e., an impairment or combination of impairments that significantly limits the claimant's physical or mental ability to do basic work activities. Pass v. Chater, 65 F.3d 1200, 1203 (4th Cir. 1995); see 20 C.F.R. §§ 404.1520(c), 404.1521(a), 416.920(c), 416.921(a).3

Third, if the claimant has a severe impairment, then the Commissioner will consider the medical severity of the impairment. If the impairment meets or equals one of the presumptively disabling impairments listed in the regulations, then the claimant is considered disabled, regardless of age, education, and work experience. 20 C.F.R. §§ 404.1520(a)(4)(iii), 404.1520(d), 416.920(a)(4)(iii), 416.920(d); see Radford, 734 F.3d at 293.

Fourth, if the claimant's impairment is severe, but it does not meet or equal one of the presumptively disabling impairments, then the Commissioner will assess the claimant's RFC to determine the claimant's "ability to meet the physical, mental, sensory, and other requirements" of the claimant's past relevant work. 20 C.F.R. §§ 404.1520(a)(4)(iv), 404.1545(a)(4), 416.920(a)(4)(iv), 416.945(a)(4). RFC is a measurement of the most a claimant can do despite his or her limitations. Hines v. Barnhart, 453 F.3d 559, 562 (4th Cir. 2006); see 20 C.F.R. §§ 404.1545(a)(1), 416.945(a)(1). The claimant is responsible for providing evidence the Commissioner will use to make a finding as to the claimant's RFC, but the Commissioner is responsible for developing the claimant's "complete medical history, including arranging for a consultative examination(s) if necessary, and making every reasonable effort to help [the claimant] get medical reports from [the claimant's] own medical sources." 20 C.F.R. §§ 404.1545(a)(3), 416.945(a)(3). The Commissioner also will consider certain non-medical evidence and other evidence listed in the regulations. See id. If a claimant retains the RFC to perform past relevant work, then the claimant is not disabled. Id. §§ 404.1520(a)(4)(iv), 416.920(a)(4)(iv).

Fifth, if the claimant's RFC as determined in step four will not allow the claimant to perform past relevant work, then the burden shifts to the Commissioner to prove that there is other work that the claimant can do, given the claimant's RFC as determined at step four, age, education, and work experience. See Hancock v. Astrue, 667 F.3d 470, 472-73 (4th Cir. 2012). The Commissioner must prove not only that the claimant's RFC will allow the claimant to make an adjustment to other work, but also that the other work exists in significant numbers in the national economy. See Walls, 296 F.3d at 290; 20 C.F.R. §§ 404.1520(a)(4)(v), 416.920(a)(4)(v). If the claimant can make an adjustment to other work that exists in significant numbers in the national economy, then the Commissioner will find that the claimant is not disabled. If the claimant cannot make an adjustment to other work, then the Commissioner will find that the claimant is disabled. 20 C.F.R. §§ 404.1520(a)(4)(v), 416.920(a)(4)(v).

III

Substantial Evidence Standard

The Court reviews an ALJ's decision to determine whether the ALJ applied the correct legal standards and whether the factual findings are supported by substantial evidence. See Craig v. Chater, 76 F.3d 585, 589 (4th Cir. 1996). In other words, the issue before the Court "is not whether [Plaintiff] is disabled, but whether the ALJ's finding that [Plaintiff] is not disabled is supported by substantial evidence and was reached based upon a correct application of the relevant law." Id. The Court's review is deferential, as "[t]he findings of the Commissioner of Social Security as to any fact, if supported by substantial evidence, shall be conclusive." 42 U.S.C. § 405(g). Under this standard, substantial evidence is less than a preponderance but is enough that a reasonable mind would find it adequate to support the Commissioner's conclusion. See Hancock, 667 F.3d at 472; see also Richardson v. Perales, 402 U.S. 389, 401, 91 S.Ct. 1420, 1427 (1971).

In evaluating the evidence in an appeal of a denial of benefits, the court does "not conduct a de novo review of the evidence," Smith v. Schweiker, 795 F.2d 343, 345 (4th Cir. 1986), or undertake to reweigh conflicting evidence, make credibility determinations, or substitute its judgment for that of the Commissioner. Hancock, 667 F.3d at 472. Rather, "[t]he duty to resolve conflicts in the evidence rests with the ALJ, not with a reviewing court." Smith v. Chater, 99 F.3d 635, 638 (4th Cir. 1996). When conflicting evidence allows reasonable minds to differ as to whether a claimant is disabled, the responsibility for that decision falls on the ALJ. Johnson v. Barnhart, 434 F.3d 650, 653 (4th Cir. 2005) (per curiam).

IV

Discussion

Plaintiff contends that the ALJ erroneously assessed his RFC contrary to Social Security Ruling4 ("SSR") 96-8p, 1996 WL 374184 (July 2, 1996). Pl.'s Mem. Supp. Mot. Summ. J. 3-9, ECF No. 13-1. Plaintiff maintains that the ALJ failed to perform properly a function-by-function assessment of his ability to perform the physical and mental demands of work. Id. at 5. In particular, he argues that the ALJ failed to explain the limitations in the ALJ's RFC assessment. Id. at 5-6. He then contends that, although the ALJ found that he had moderate difficulties with regard to concentration, persistence, or pace, the ALJ failed to include any limitation on concentration, persistence, or pace in the RFC assessment. Id. at 6-7. Rather, according to Plaintiff, the ALJ limited him to the performance of simple, routine, and repetitive tasks. Id. at 7 (citing R. at 20). Plaintiff further asserts that the ALJ failed to evaluate properly pertinent evidence, including opinion evidence and third-party testimony. Id. at 7-9. Plaintiff finally contends that the ALJ erroneously evaluated his subjective complaints. Id. at 9-13. For the reasons discussed below, the Court remands this case for further proceedings.

The Court turns first to the ALJ's consideration of Plaintiff's moderate difficulties in concentration, persistence, or pace. SSR 96-8p, 1996 WL 374184 (July 2, 1996), explains how adjudicators should assess RFC and instructs that the RFC

Mascio v. Colvin, 780 F.3d 632, 636 (4th Cir. 2015) (alteration in original) (footnote omitted) (citations omitted). The Fourth Circuit has held, however, that a per se rule requiring remand when the ALJ does not perform an explicit function-by-function analysis "is inappropriate given that remand would prove futile in cases where the ALJ does not discuss functions that are `irrelevant or uncontested.'" Id. (quoting Cichocki v. Astrue, 729 F.3d 172, 177 (2d Cir. 2013) (per curiam)). Rather, remand may be appropriate "where an ALJ fails to assess a claimant's capacity to perform relevant functions, despite contradictory evidence in the record, or where other inadequacies in the ALJ's analysis frustrate meaningful review." Id. (quoting Cichocki, 729 F.3d at 177). The court in Mascio concluded that remand was appropriate because it was "left to guess about how the ALJ arrived at his conclusions on [the claimant's] ability to perform relevant functions" because the ALJ had "said nothing about [the claimant's] ability to perform them for a full workday," despite conflicting evidence as to the claimant's RFC that the ALJ did not address. Id. at 637; see Monroe v. Colvin, 826 F.3d 176, 187-88 (4th Cir. 2016) (remanding because ALJ erred in not determining claimant's RFC using function-by-function analysis; ALJ erroneously expressed claimant's RFC first and then concluded that limitations caused by claimant's impairments were consistent with that RFC).

The Fourth Circuit further held in Mascio that "an ALJ does not account `for a claimant's limitations in concentration, persistence, and pace by restricting the hypothetical question to simple, routine tasks or unskilled work.'" Mascio, 780 F.3d at 638 (quoting Winschel v. Comm'r of Soc. Sec., 631 F.3d 1176, 1180 (11th Cir. 2011)). "[T]he ability to perform simple tasks differs from the ability to stay on task. Only the latter limitation would account for a claimant's limitation in concentration, persistence, or pace." Id. The court in Mascio remanded the case for the ALJ to explain why the claimant's moderate limitation in concentration, persistence, or pace at step three did not translate into a limitation in the claimant's RFC. Id. In other words, under Mascio, "once an ALJ has made a step three finding that a claimant suffers from moderate difficulties in concentration, persistence, or pace, the ALJ must either include a corresponding limitation in her RFC assessment, or explain why no such limitation is necessary." Talmo v. Comm'r, Soc. Sec., Civil Case No. ELH-14-2214, 2015 WL 2395108, at *3 (D. Md. May 19, 2015), report and recommendation adopted (D. Md. June 5, 2015).

The ALJ here found that Plaintiff could "perform simple, routine, repetitive tasks," with "no production rate for pace of work." R. at 20. Defendant maintains that "an RFC excluding production-paced work accommodates a moderate difficulty in maintaining concentration, persistence, or pace." Def.'s Mem. Supp. Mot. Summ. J. 7, ECF No. 18-1. Thus, "the RFC in this case accommodated Plaintiff's moderate difficulty in maintaining concentration, persistence, or pace under Mascio." Id. at 8. The VE defined "production-rate pace" as "an assembly line production rate" (R. at 62), which "makes it difficult, if not impossible," for the Court to assess whether substantial evidence supports the inclusion of "no production rate for pace of work" in the ALJ's assessment of Plaintiff's RFC. Thomas v. Berryhill, 916 F.3d 307, 312 (4th Cir. 2019); see also Perry v. Berryhill, ___ F. App'x ____, No. 18-1076, 2019 WL 1092627, at *3 (4th Cir. Mar. 8, 2019); Butler v. Berryhill, No. 1:18CV59, 2019 WL 442377, at *11 (N.D. Ind. Feb. 4, 2019) (rejecting Commissioner's argument that ALJ's limiting claimant to work that did not require "production-rate pace (e.g. assembly line work)" adequately described how often claimant would be off task during workday). The ALJ "must both identify evidence that supports his conclusion and `build an accurate and logical bridge from [that] evidence to his conclusion.'" Woods v. Berryhill, 888 F.3d 686, 694 (4th Cir. 2018) (alteration in original) (quoting Monroe, 826 F.3d at 189). An ALJ's failure to do so constitutes reversible error. Lewis v. Berryhill, 858 F.3d 858, 868 (4th Cir. 2017). Remand is warranted in this case for the ALJ to include a narrative discussion describing how the evidence supports the ALJ's conclusion in this regard. See Monroe, 826 F.3d at 191. On remand, the ALJ must establish for how long and under what conditions Plaintiff is able to focus his attention on work activities and stay on task at a sustained rate. See Thomas, 916 F.3d at 312 n.5.

Plaintiff also maintains that the ALJ failed to evaluate properly pertinent evidence, including opinion evidence and third-party testimony, and erroneously evaluated his subjective complaints. Pl.'s Mem. Supp. Mot. Summ. J. 7-13, ECF No. 13-1. Because remand is granted on other grounds, the Court does not address Plaintiff's remaining arguments. See Testamark v. Berryhill, 736 F. App'x 395, 399 n.2 (4th Cir. 2018) (per curiam); Boone v. Barnhart, 353 F.3d 203, 211 n.19 (3d Cir. 2003). In any event, the ALJ also should address these other deficiencies identified by Plaintiff. See Hancock v. Barnhart, 206 F.Supp.2d 757, 763 n.3 (W.D. Va. 2002) (on remand, ALJ's prior decision has no preclusive effect as it is vacated and new hearing is conducted de novo).

V

Conclusion

For the reasons stated above, Defendant's Motion for Summary Judgment (ECF No. 18) is DENIED. Plaintiff's Motion for Summary Judgment (ECF No. 13) is DENIED. Plaintiff's alternative motion for remand (ECF No. 13) is GRANTED. Defendant's final decision is REVERSED under the fourth sentence of 42 U.S.C. § 405(g). This matter is REMANDED for further proceedings consistent with this opinion. A separate order will issue.