What is Quest Diagnostics Incorporated (DGX)'s PEG ratio?

Quest Diagnostics Incorporated (DGX) has a PEG ratio of 0.00 (N/A), based on a PE ratio of 25.0 and expected EPS growth of -3.6% (5-Year EPS CAGR).

Is DGX undervalued based on its PEG ratio?

A PEG below 1.0 is conventionally read as potentially undervalued, 1.0–2.0 as fairly valued, and above 2.0 as potentially overvalued relative to growth. At 0.00, Quest Diagnostics Incorporated (DGX) screens as "N/A". PEG is one signal, not investment advice — see the full DCF fair value at evidinvest.com/valuation/DGX.

Quest Diagnostics Incorporated (DGX) PEG Ratio

N/A

PE ratio relative to earnings growth — is the valuation justified?

—

PEG Ratio

Negative EPS growth — PEG not meaningful when earnings are declining

—

Growth Rate Source

Good Data Quality5-Year EPS CAGR

Current Price

$235.52

TTM EPS

$9.42

P/E Ratio

25.00

Growth Rate

-3.6%

5-Year EPS CAGR

Sector

Healthcare

Medical - Diagnostics & Research

Calculated

8/18/2026

10:23:38 AM

PEG Ratio Unavailable

Negative Growth — PEG not meaningful

Peer Comparison

Sample Size

4 peers

Industry Median PEG

3.16

25th Percentile

2.95

75th Percentile

19.73

Symbol	Company	PEG	P/E	Growth	vs DGX
DVA	DaVita Inc.	2.43	20.0	8.2%	—
MTD	Mettler-Toledo International Inc.	2.95	31.9	10.8%	—
BDX	Becton, Dickinson and Company	3.37	54.8	16.3%	—
WAT	Waters Corporation	19.73	101.7	5.2%	—

How to Interpret PEG Ratio

PEG < 1.0 — Potentially Undervalued. The stock may be priced below its earnings growth rate, suggesting a potential buying opportunity.

PEG 1.0–2.0 — Fairly Valued. The stock price is roughly in line with its earnings growth. A PEG of 1.0 is often considered "fair value."

PEG > 2.0 — Potentially Overvalued. The stock may be priced above what its earnings growth justifies.

Limitations:PEG ratios are less reliable for financial firms (earnings driven by interest margins), companies with negative/zero earnings growth, and hypergrowth companies (>100% growth) where the ratio may appear misleadingly low. Always use PEG alongside other valuation metrics.

Quest Diagnostics Incorporated (DGX) PEG Ratio

Peer Comparison

How to Interpret PEG Ratio

More on DGX

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Quest Diagnostics Incorporated (DGX) PEG Ratio

Peer Comparison

How to Interpret PEG Ratio

More on DGX

Compare with peers

Explore