I just Googled "is EGFR in the 60 - 70 range an indicator of kidney disease", and got this result:

"An eGFR (estimated glomerular filtration rate) in the range of 60-70 may indicate early-stage kidney disease, but it's not a definitive diagnosis on its own.
Here's why:
eGFR measures how well your kidneys are filtering waste from your blood. A normal eGFR is typically above 90. An eGFR between 60 and 89 is classified as Stage 2 Chronic Kidney Disease (CKD). However, a diagnosis of CKD Stage 2 requires evidence of kidney damage IN ADDITION to the eGFR value. This damage can include things like protein or blood in your urine, or abnormalities found through imaging tests.
eGFR naturally decreases with age. So, an eGFR of 65 in an older adult might be considered normal, whereas the same value in a younger person could warrant further investigation.
If your eGFR is 60 or higher and there are no other signs of kidney damage, you do not have CKD.
In summary:
An eGFR between 60 and 89 without kidney damage is generally considered a normal finding.
An eGFR below 60 that persists for three months or more is a strong indicator of kidney disease.
If your eGFR is between 60 and 89 and you have signs of kidney damage (like protein in your urine), it could indicate early-stage kidney disease (CKD Stage 2).
Important: It's crucial to discuss your eGFR results and any related concerns with your doctor. They can interpret the results in the context of your overall health and determine if further testing or treatment is needed. "