Authorities as the decision cited them, with how this panel applied each one.
Lab. Code § 5952(d); Lamb v. Workmen's Comp. Appeals Bd. (1974) 11 Cal.3d 274, 281; Garza v. Workmen's Comp. Appeals Bd. (1970) 3 Cal.3d 312, 317
Any award, order, or decision of the Appeals Board must be supported by substantial evidence.
The Board found Dr. Cohen's report was not substantial medical evidence because it lacked narrative reasoning and did not address impairment in relation to other diagnoses.
From the decision · page 5II.
It is well established that any award, order, or decision of the Appeals Board must be
supported by substantial evidence. (Lab. Code,1 § 5952(d); Lamb v. Workmen's Comp. Appeals
Bd. (1974) 11 Cal.3d 274, 281 [39 Cal.Comp.Cases 310]; Garza v. Workmen's Comp. Appeals Bd.
(1970) 3 Cal.3d 312, 317 [35 Cal.Comp.Cases 500].) In order to consist of substantial medical
evidence on the issues of permanent disability and apportionment, a medical opinion must be
framed in terms of reasonable medical probability, it must not be speculative, it must be based on
pertinent facts and on an adequate examination and history, and it must set forth reasoning in
support of its conclusions. (Escobedo v. Marshalls (2005) 70 Cal.Comp.Cases 604, 621-622
(Appeals Board en banc).)
Section 4663(a) provides that "[a]pportionment of permanent disability shall be based on
causation." (Lab. Code, § 4663(a).) Section 4664(a) states that "[t]he employer shall only be liable
for the percentage of permanent disability directly caused by the injury arising out of and occurring
in the course of employment." (Lab.
Escobedo v. Marshalls (2005) 70 Cal.Comp.Cases 604, 621-622 (Appeals Board en banc)
A medical opinion must be framed in terms of reasonable medical probability, not be speculative, be based on pertinent facts and an adequate examination and history, and set forth reasoning in support of its conclusions.
Dr. Cohen's report was not substantial medical evidence because it lacked narrative reasoning and did not address impairment in relation to other diagnoses.
From the decision · page 5II.
It is well established that any award, order, or decision of the Appeals Board must be
supported by substantial evidence. (Lab. Code,1 § 5952(d); Lamb v. Workmen's Comp. Appeals
Bd. (1974) 11 Cal.3d 274, 281 [39 Cal.Comp.Cases 310]; Garza v. Workmen's Comp. Appeals Bd.
(1970) 3 Cal.3d 312, 317 [35 Cal.Comp.Cases 500].) In order to consist of substantial medical
evidence on the issues of permanent disability and apportionment, a medical opinion must be
framed in terms of reasonable medical probability, it must not be speculative, it must be based on
pertinent facts and on an adequate examination and history, and it must set forth reasoning in
support of its conclusions. (Escobedo v. Marshalls (2005) 70 Cal.Comp.Cases 604, 621-622
(Appeals Board en banc).)
Section 4663(a) provides that "[a]pportionment of permanent disability shall be based on
causation." (Lab. Code, § 4663(a).) Section 4664(a) states that "[t]he employer shall only be liable
for the percentage of permanent disability directly caused by the injury arising out of and occurring
in the course of employment." (Lab.
Lab. Code § 4663(a)
Section 4663(a): Apportionment of permanent disability shall be based on causation.
The Board considered apportionment standards in reviewing the medical evidence.
From the decision · page 5II.
It is well established that any award, order, or decision of the Appeals Board must be
supported by substantial evidence. (Lab. Code,1 § 5952(d); Lamb v. Workmen's Comp. Appeals
Bd. (1974) 11 Cal.3d 274, 281 [39 Cal.Comp.Cases 310]; Garza v. Workmen's Comp. Appeals Bd.
(1970) 3 Cal.3d 312, 317 [35 Cal.Comp.Cases 500].) In order to consist of substantial medical
evidence on the issues of permanent disability and apportionment, a medical opinion must be
framed in terms of reasonable medical probability, it must not be speculative, it must be based on
pertinent facts and on an adequate examination and history, and it must set forth reasoning in
support of its conclusions. (Escobedo v. Marshalls (2005) 70 Cal.Comp.Cases 604, 621-622
(Appeals Board en banc).)
Section 4663(a) provides that "[a]pportionment of permanent disability shall be based on
causation." (Lab. Code, § 4663(a).) Section 4664(a) states that "[t]he employer shall only be liable
for the percentage of permanent disability directly caused by the injury arising out of and occurring
in the course of employment." (Lab.
Lab. Code § 4664(a)
Section 4664(a): The employer shall only be liable for the percentage of permanent disability directly caused by the injury arising out of and occurring in the course of employment.
The Board considered employer liability for permanent disability in reviewing the medical evidence.
From the decision · page 5Code, § 4664(a).)
Overlap occurs when factors of disability resulting from an injury are the same as factors
of disability resulting from a different injury.2 (Todd v. Subsequent Injuries Benefits Trust Fund
(2020) 85 Cal.Comp.Cases 576, 585 (Appeals Board en banc).) The attribution of overlapping
factors of disability to different causes is called apportionment. (Id.) The employer has the burden
of proving apportionment. (Kopping v. Workers' Comp. Appeals Bd. (2006) 142 Cal.App.4th
1099, 1114 [71 Cal.Comp.Cases 1229]: Escobedo v. Marshalls (2005) 70 Cal.Comp.Cases 604,
613 (Appeals Board en banc).)
However, the issue in this case is not overlap or apportionment as between different
injuries. Rather, the question in this case is whether duplication exists between factors of disability
resulting from a single injury. "Duplication occurs when the combining of different factors of
disability does not further reduce an injured workers' ability to compete in an open labor market
Blackledge v. Bank of America (2010) 75 Cal.Comp.Cases 613 (Appeals Board en banc)
It is improper for the WCJ to issue rating instructions directing the DEU rater to read a medical report and extract impairment ratings; the WCJ must list all impairments in the instructions.
The WCJ's rating instructions did not comply with Blackledge, as they improperly directed the DEU to extract impairment ratings from the report rather than listing all impairments.
From the decision · page 6WCJ's responsibility to list all impairments in the instructions to the DEU. It is improper for the