DAVID C. BURY, District Judge.
This matter was referred to Magistrate Judge Jacqueline M. Rateau, pursuant to Rules of Practice for the United States District Court, District of Arizona (Local Rules), Rule (Civil) 72.1(a), and she issued a Report and Recommendation (R&R) on August 28, 2015. (Doc. 24: R&R). She recommends remanding the case to the Administrative Law Judge (ALJ) for further proceedings on Plaintiff's Application for Social Security Disability Insurance Benefits.
The duties of the district court, when reviewing a R&R of a Magistrate Judge, are set forth in Rule 72 of the Federal Rules of Civil Procedure and 28 U.S.C. § 636(b)(1). The district court may "accept, reject, or modify, in whole or in part, the findings or recommendations made by the magistrate judge." Fed.R.Civ.P. 72(b), 28 U.S.C. § 636(b)(1). When the parties object to a R&R, "`[a] judge of the [district] court shall make a de novo determination of those portions of the [R&R] to which objection is made.'" Thomas v. Arn, 474 U.S. 140, 149-50 (1985) (quoting 28 U.S.C. § 636(b)(1)). When no objections are filed, the district court does not need to review the R&R de novo. Wang v. Masaitis, 416 F.3d 992, 1000 n. 13 (9th Cir.2005); United States v. Reyna-Tapia, 328 F.3d 1114, 1121-22 (9th Cir.2003) (en banc).
The parties were sent copies of the R&R and instructed they had 14 days to file written objections. 28 U.S.C. § 636(b), see also, Federal Rule of Criminal Procedure 72 (party objecting to the recommended disposition has fourteen (14) days to file specific, written objections). No objections have been filed.
United States Magistrate Judge Rateau considered the following issues: 1) whether the ALJ accorded appropriate weight to examining physician testimony; 2) whether substantial evidence supported the ALJ's findings regarding Plaintiffs ability to concentrate and remember; 3) whether substantial evidence supported the ALJ's evaluation of lay-witness statements, and 4) whether the ALJ properly evaluated the Plaintiff's credibility. The Magistrate Judge found substantial evidence did support the ALJ's findings regarding concentration. She found the ALJ properly evaluated the Plaintiff's credibility, and the ALJ's well-supported reasons for rejecting the claimant's testimony applied equally to the lay witness testimony. The Magistrate Judge, however, found remand was necessary because the ALJ failed to even mention the examining physician Dr. Hassman's opinion that Plaintiff would have to change her sitting position at least every hour for at least five minutes. Remand is necessary because, as the vocational expert testified, such a limitation would start to decrease her ability to work on a full-time basis. "With this testimony in the record, it is apparent that the limitation, if not rejected by the ALJ, would have some impact on the ALJ's decision." (R&R (Doc. 24) at 8.)
Pursuant to 28 U.S.C. § 636(b), this Court makes a de novo determination as to those portions of the R&R to which there are objections. 28 U.S.C. § 636(b)(1) ("A judge of the court shall make a de novo determination of those portions of the report or specified proposed findings and recommendations to which objection is made.") To the extent that no objection has been made, arguments to the contrary have been waived. McCall v. Andrus, 628 F.2d 1185, 1187 (9
While there are no objections and review has, therefore, been waived, the Court nevertheless reviews at a minimum, de novo, the Magistrate Judge's conclusions of law. Robbins v. Carey, 481 F.3d 1143, 1147 (9