OASIS · Section M
M2001 — Drug Regimen Review
Response options, how to score it, and the error that most often sends the record back. Cited to Ch. 3, Item M2001.
Response options
| Value | Meaning |
|---|---|
| 0 | No — no issues found during review |
| 1 | Yes — issues found during review |
| 9 | NA — patient is not taking any medications |
| - | Dash — the drug regimen review was not completed (an element such as checking for drug-drug interactions was skipped); CMS expects this to be rare |
How to score it
Conduct a complete drug regimen review — medication reconciliation plus a review of every medication the patient is taking (prescribed and OTC, including supplements, vitamins, and herbal/homeopathic products, by any route) plus TPN and oxygen — as close to the actual SOC/ROC time as possible. Code 1 (Yes) only when, in the assessing clinician's professional judgment, an identified issue reaches the level of clinical significance that warrants physician/allowed practitioner notification by midnight of the next calendar day at the latest.
The common error
Coding 0 (No issues) when part of the review was actually skipped rather than completed and clean — CMS's own coding example treats a review missing even one element (such as the drug-drug interaction check) as incomplete, calling for a dash, not a 0.
CMS Q&As on this item
- Q160.3.1 In therapy only cases, can an LPN in the office work cooperatively with the therapist to complete the Drug…
- Q160.3.2 On therapy only cases, can the therapist collaborate with a pharmacist when completing the Drug Regimen…
- Q160.3.3 For therapy only cases, can we have our therapist complete the entire comprehensive assessment, except the…
- Q160.3.5 Would the use of essential oils be included in the Drug Regimen Review (DRR), whether taken orally, diffused…
- Q160.3.6 We have educated clinicians that it is a requirement that medication reconciliation be done. With this in…
- Q160.4 M2001 & M2003. The assessing clinician identifies a problem with medications. The patient has not picked up a…
- Q160.4.2 M2001 & M2003. With the expanded one clinician convention – would it be appropriate if a second clinician…
- Q160.4.100 M2001, M2003, M2005. When we complete a drug regimen review, our EMR software runs an interaction check…
- Q160.7 M2001, M2003, M2005, M2010, M2020. Our patient has nine herbal supplements that have been prescribed by their…
Source: OASIS-E2 Guidance Manual — Ch. 3, Item M2001. Verified 2026-04-26.
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