M00–M99
Diseases of the Musculoskeletal System and Connective Tissue
Arthritis, osteoporosis, back pain, gout
M1A.461
Other secondary chronic gout, right knee
Non-billable
M1A.4610
Other secondary chronic gout, right knee, without tophus (tophi)
Billable
M1A.4611
Other secondary chronic gout, right knee, with tophus (tophi)
Billable
M1A.462
Other secondary chronic gout, left knee
Non-billable
M1A.4620
Other secondary chronic gout, left knee, without tophus (tophi)
Billable
M1A.4621
Other secondary chronic gout, left knee, with tophus (tophi)
Billable
M1A.469
Other secondary chronic gout, unspecified knee
Non-billable
M1A.4690
Other secondary chronic gout, unspecified knee, without tophus (tophi)
Billable
M1A.4691
Other secondary chronic gout, unspecified knee, with tophus (tophi)
Billable
M1A.47
Other secondary chronic gout, ankle and foot
Non-billable
M1A.471
Other secondary chronic gout, right ankle and foot
Non-billable
M1A.4710
Other secondary chronic gout, right ankle and foot, without tophus (tophi)
Billable
M1A.4711
Other secondary chronic gout, right ankle and foot, with tophus (tophi)
Billable
M1A.472
Other secondary chronic gout, left ankle and foot
Non-billable
M1A.4720
Other secondary chronic gout, left ankle and foot, without tophus (tophi)
Billable
M1A.4721
Other secondary chronic gout, left ankle and foot, with tophus (tophi)
Billable
M1A.479
Other secondary chronic gout, unspecified ankle and foot
Non-billable
M1A.4790
Other secondary chronic gout, unspecified ankle and foot, without tophus (tophi)
Billable
M1A.4791
Other secondary chronic gout, unspecified ankle and foot, with tophus (tophi)
Billable
M1A.48
Other secondary chronic gout, vertebrae
Non-billable
M1A.48X0
Other secondary chronic gout, vertebrae, without tophus (tophi)
Billable
M1A.48X1
Other secondary chronic gout, vertebrae, with tophus (tophi)
Billable
M1A.49
Other secondary chronic gout, multiple sites
Non-billable
M1A.49X0
Other secondary chronic gout, multiple sites, without tophus (tophi)
Billable
M1A.49X1
Other secondary chronic gout, multiple sites, with tophus (tophi)
Billable
M1A.9
Chronic gout, unspecified
Non-billable
M1A.9XX0
Chronic gout, unspecified, without tophus (tophi)
Billable
M1A.9XX1
Chronic gout, unspecified, with tophus (tophi)
Billable
M20
Acquired deformities of fingers and toes
Non-billable
M20.0
Deformity of finger(s)
Non-billable
M20.00
Unspecified deformity of finger(s)
Non-billable
M20.001
Unspecified deformity of right finger(s)
Billable
M20.002
Unspecified deformity of left finger(s)
Billable
M20.009
Unspecified deformity of unspecified finger(s)
Billable
M20.01
Mallet finger
Non-billable
M20.011
Mallet finger of right finger(s)
Billable
M20.012
Mallet finger of left finger(s)
Billable
M20.019
Mallet finger of unspecified finger(s)
Billable
M20.02
Boutonniere deformity
Non-billable
M20.021
Boutonniere deformity of right finger(s)
Billable
M20.022
Boutonniere deformity of left finger(s)
Billable
M20.029
Boutonniere deformity of unspecified finger(s)
Billable
M20.03
Swan-neck deformity
Non-billable
M20.031
Swan-neck deformity of right finger(s)
Billable
M20.032
Swan-neck deformity of left finger(s)
Billable
M20.039
Swan-neck deformity of unspecified finger(s)
Billable
M20.09
Other deformity of finger(s)
Non-billable
M20.091
Other deformity of right finger(s)
Billable
M20.092
Other deformity of left finger(s)
Billable
M20.099
Other deformity of finger(s), unspecified finger(s)
Billable
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