3A01.Y Other specified megaloblastic anaemia due to vitamin B12 deficiency
3A01.Z Megaloblastic anaemia due to vitamin B12 deficiency, unspecified
Now this classification system seems to go a bit awry
6D85Y Dementia due to vitamin B12 deficiency
and continues……..
6D86 Behavioural or psychological disturbances in dementia
6D86.0 Psychotic symptoms in dementia
6D86.1 Mood symptoms in dementia…………
For me the answer is the same : 697 [ no units ]?
Using the formula of C63H88CoN14O14 (vitamin B12)
Using the periodic table, Carbon’s atomic is 6. Hydrogen’s is 1. Etc.
Therefore :-
(6 x 63) + (1 x 88) + 27 + (7 x 14) + (8 x 14) = 697.
The frequency we receive our vitamin B12 tends not to be variable. Generally, it is mean (average in mathematics). When B12 is administered at speed it Hertz. 😂🤣 you are funny. Okay, my jokes need W = F s cos θ (Work)
It appears that the subordinate entries to 3A01 Megaloblastic anaemia due to vitamin B12 deficiency imply that they ONLY occur in conjunction with Megaloblastic anaemia.
But we have seen the suggestion that Megaloblastic anaemia is relatively rare (at least in some parts of the world) because of the amount of folate (in whatever form) we consume.
Therefore, any such implication about the six subordinates is very questionable.
And does "street" use of nitrous oxide fall within 3A01.5 Drug-induced vitamin B12 deficiency anaemia? While anaesthetic use of nitrous oxide would appear an obvious inclusion, street use is unclear.
My! The list goes on and wraps itself in ever more ridiculous layers of "except", "other", and questionable definitions.
This coding should help with statistical analysis. Finding the percentage of patients with 3A01 and each of the subtypes. But any numbers derived have their utility questioned when the types and subtypes do not make sense.
We see repeated assertions that B12 absorption decreases with age. If someone maintains their same diet but reduces what they can absorb, slowly, year by year, does that mean 3A01.2 because it is too low an intake for them? Life-long mildly impaired B12 absorption due to a particular genetic composition changes from insignificance to significance due solely to age - while that exact same ageing and reduced B12 absorption in someone with a different genetic composition might have no impact.
For example, posts about the vitamin here might be assigned a metadata tag of "cobalamin" - despite only rare examples actually containing that word as such. Or even an invented tag like "cobalamin-metadata-tag".
Content on HealthUnlocked does not replace the relationship between you and doctors or other healthcare professionals nor the advice you receive from them.
Never delay seeking advice or dialling emergency services because of something that you have read on HealthUnlocked.
Gluten and B12 deficiency 
AUGH! 
Bittersweet Bonds - Pernicious Anemia and the Doctor-Patient Dance
