I am understanding that you are asking if you can count interpreting the test toward the "amount of data" column of MDM.
If you are billing for the test, you may not count ordering or interpreting the test. I would assume you are billing for the test you are performing.
You can only count a data point for tests you are not billing separately for. This has nothing to do with the specialty or subspecialty. If I am misunderstanding your question, please let me know.
From the AMA guide (full guide here
https://www.ama-assn.org/system/files/2019-06/cpt-office-prolonged-svs-code-changes.pdf):
Page 2: Any specifically identifiable procedure or service (ie, identified with a specific CPT code) performed on the date of E/M services maybe reported separately.
The actual performance and/or interpretation of diagnostic tests/studies during a patient encounter are not included in determining the levels of E/M services when reported separately. Physician performance of diagnostic tests/studies for which specific CPT codes are available may be reported separately, in addition to the appropriate E/M code. The physician’s interpretation of the results of diagnostic tests/ studies (ie, professional component) with preparation of a separate distinctly identifiable signed written report may also be reported separately, using the appropriate CPT code and, if required, with modifier 26 appended. If a test/study is independently interpreted in order to manage the patient as part of the E/M service, but is not separately reported, it is part of medical decision making
Page 6: The amount and/or complexity of data to be reviewed and analyzed. This data includes medical records, tests, and/or other information that must be obtained, ordered, reviewed, and analyzed for the encounter. This includes information obtained from multiple sources or interprofessional communications
that are not separately reported. It includes interpretation of tests
that are not separately reported. Ordering a test is included in the category of test result(s) and the review of the test result is part of the encounter and not a subsequent encounter. Data is divided into three categories:
•Tests, documents, orders, or independent historian(s). (Each unique test, order or document is counted to meet a threshold number)
•Independent interpretation of tests.
•Discussion of management or test interpretation with external physician or other qualified healthcare professional or appropriate source