These are always a bit tricky, when they don't have a Wikipedia article, but I try to go by a couple of basic "rules of thumb" when it comes to evaluating them, similar to what Wikipedia would do if they were to have an article proposed to them.
1) Did they do something unique in their lives that only that person did, or very few did, that gained them fame, recognition, awards, etc.? Note that local notoriety that does not make it to a national or international level makes it very difficult to prove that they're more than a local legend. Not impossible, but difficult.
2) Is there sufficient evidence of this listed on sources (typically websites, but also books, articles in magazines, etc.) that supports the information listed, especially the items that are their "claim to fame"?
I think these are the keys to any Notable, so applying this to Bertha Levy:
1) Most of what she did was something that others did as well, although sometimes you also have to take into account the preponderance of evidence that shows they did so much in their life that it was recognized by a larger audience. I have never heard of her, but that's not a good measurement. She does not appear to have been nationally recognized. The few items that stick out to me are:
Her graduation (one of two females for that time period) - although there are others more famous for being the first women with a degree in medicine.
Her being a part of the founding of the local Urban League in a major city, although it's hard to tell with just this information whether she played a major or minor role in this.
And her role in bringing Medicaid to Oklahoma City, and again, this was a federal program, so while OKC may have been one of the first, it by itself is not unique.
Unfortunately, there are millions of doctors, and thousands of them who have provided above and beyond care or even free care to patients, so while this may have been of tremendous impact to a certain community, it's not unique in any way. But based on the items mentioned above, I think if it was written in such a way that proved she was more than a minor participant in the founding of the Urban League and the same for bringing Medicaid to OKC, then it puts her into a gray area where she would be considered for Notability.
2) For the other, I did a Google Search and unfortunately I came up with no sources, other than My Life, Fold 3, and one for her medical practice. So while I would agree that she did some amazing things, it does not appear on the surface that she was Notable in the way that Wikipedia would typically consider notability.