This is an appeal from an order of the district court affirming the decision of the Secretary of Health and Human Services (Secretary) to deny plaintiff’s application for disability benefits. We affirm.
*81 I
On June 18, 1982, plaintiff, Mrs. Josefa Delgado, then sixty years old, applied for disability benefits, alleging that she had been disabled since January 1, 1982. A hearing was held before an Administrative Law Judge (AU). Mrs. Delgado was represented by an attorney as she has been throughout this litigation. The ALJ issued a written decision denying the application on the ground that Mrs. Delgado could still perform her past relevant work. See 20 C.F.R. § 404.1520(e). The Appeals Council denied review of that decision, 1 and, therefore, it is the final decision of the Secretary.
Mrs. Delgado next filed suit in federal district court pursuant to 42 U.S.C. § 405(g), seeking review of the Secretary’s decision. Subsequently, the parties filed cross-motions for summary judgment and the district judge referred the motion to a magistrate. The magistrate, finding a lack of substantial evidence to support the Secretary’s determination that Mrs. Delgado could return to her past relevant work, recommended that the case be remanded to the Secretary for a vocational assessment. See 20 C.F.R. § 404.1566(e). Plaintiff timely filed an objection to the magistrate’s recommendation with the district judge, but she objected only to the remand not to the findings of the magistrate. The Secretary filed neither an objection to the magistrate’s recommendation nor a response to plaintiff’s objection. The district judge reviewed the entire record de novo and found that plaintiff was not disabled. The court chose not to follow the recommendation of the magistrate and instead granted the Secretary’s motion for summary judgment thereby affirming the AU’s decision. Plaintiff filed a timely appeal with this court. See Fed.R.App.P. 4(a)(1).
•On appeal, plaintiff raises two issues. First, plaintiff argues that the district judge acted improperly by making a de novo determination of the entire case instead of limiting himself to those portions of the magistrate’s recommendations to which plaintiff objected. Second, plaintiff argues that the decision of the ALJ was not supported by substantial evidence and, therefore, this court should remand the case to the Secretary. For the reasons given below, we hold that no remand is necessary because the ALJ’s decision was supported by substantial evidence.
II
A
Initially, plaintiff argues that the district judge’s de novo determination exceeded the standard set by 28 U.S.C. § 636(b)(1)(C). Section 636(b)(1)(B) permits a district judge to designate a magistrate to conduct hearings and propose findings of facts and recommendations for the disposition of various motions and petitions including, as in this case, motions for summary judgment. Section 636(b)(1)(C) further provides that:
A Judge of the court shall make a de novo determination of those portions of the report or specified proposed findings or recommendations to which objection is made. A judge of the court may accept, reject, or modify, in whole or in part, the findings or recommendations made by the magistrate.
Plaintiff apparently argues that the second sentence of the quoted passage has no effect independent of the first sentence; that is, the district judge can only accept, reject, or modify the objected-to findings or recommendations. Under plaintiff’s interpretation of the statute, a district judge must automatically accept the magistrate’s pro *82 posed disposition if neither party makes an objection. 2
We believe that the plaintiffs interpretation is wrong. Any ambiguity in the statutory language is certainly laid to rest by the legislative history and the case law. The passage under discussion was added to the Federal Magistrates Act by the 1976 amendments to that Act. A sentence similar to the first one was in the bill originally introduced in the Senate, but when it was reported by the Senate Judiciary Committee, that sentence had been deleted from the proposed amendments. The House, however, added the present first sentence to make clear that a
de novo
determination was mandatory when objections were made. Thus, the statute should be read as
permitting
modifications and
de novo
determinations by the district judge at all times but
mandating de novo
determinations when objections are raised.
See
H.R. Rep. No. 94-1609, 94th Cong., 2d Sess. 2-3 (1976),
reprinted in
1976 U.S.Code Cong. & Ad.News 6162-63.
See also United States v. Raddatz,
Case law has emphasized that under the Federal Magistrates Act the judge always retains authority to make the final determination.
See Thomas v. Am,
— U.S. -, -,
For these reasons, the district judge had the power to make a de novo determination. The order of the judge is the final and authoritative word in the district court.
B
In reviewing the decision of the Secretary, we and the district court are obliged to review all the evidence contained in the record. However, we must accept the findings of the Secretary if supported by substantial evidence; we may not decide the facts anew, reweigh the evidence, or substitute our own judgment for that of the Secretary.
See Garfield v. Schweiker,
The question before us is whether Mrs. Delgado could perform her past work. In making the initial determination, the AU had to compare the demands of plaintiff’s past work with her existing physical and mental capacities.
See Strittmatter v. Schweiker,
Although, if given the opportunity to decide the issue
de novo,
we might have reached a different conclusion than the AU, we cannot say that the AU’s finding that Mrs. Delgado could perform her past relevant work was unsupported by substantial evidence. Additionally, the AU met the requirement of “articulat[ing] at some minimal level his analysis of the evidence.”
Garfield,
For the reasons given above, the order of the district court granting defendant’s motion for summary judgment is
AFFIRMED.
Notes
. Mrs. Delgado requested a review before the Appeals Council and provided the Council with one additional piece of evidence, a one-page handwritten letter from Delgado’s attending physician. On May 26, 1983, after considering the request and additional evidence, the Appeals Council denied the request and adopted the decision of the ALJ. This one-page handwritten letter from Mrs. Delgado’s treating physician was not additional evidence which required the Appeals Council to review the record.
. The question presently before us is different from the usual "waiver” question presented by 28 U.S.C. § 636(b). This more common question is whether a party waives its right to appeal the district court’s decision when the party fails to object to the findings and recommendation of the magistrate. The majority of circuits have held that such failures to object will have some waiver effect.
See Thomas v. Am,
— U.S. -, -n. 4,
