S9991Temporary National Codes (Non-Medicare)
Services provided as part of a phase iii clinical trial
Short description: Services provided as part of
- Effective date
- January 1, 2000
- Termination date
- —
Related codes (S-series)
S0012Butorphanol tartrate, nasalS0013Esketamine, nasal sprayS0014Tacrine hydrochloride, 10 mgS0017Injection, aminocaproic acidS0020Injection, bupivicaine hydroS0021Injection, cefoperazone sodS0023Injection, cimetidine hydrocS0028Injection, famotidine, 20 mgS0030Injection, metronidazoleS0032Injection, nafcillin sodiumS0034Injection, ofloxacin, 400 mgS0039Injection, sulfamethoxazole
Frequently asked questions
What is HCPCS code S9991?
S9991 is a HCPCS Level II code for Services provided as part of a phase iii clinical trial.
What category is HCPCS code S9991 in?
S9991 falls under the Temporary National Codes (Non-Medicare) category of HCPCS Level II.
When did HCPCS code S9991 become effective?
S9991 has been effective since January 1, 2000, per CMS's quarterly HCPCS update.
HCPCS Level II data from CMS (public domain). HCPCS Level I (CPT) codes are not included — CPT is copyrighted by the American Medical Association. Always verify codes with authoritative sources before making coding or billing decisions.