Revised Code of Washington

Wash. Rev. Code § 18.100.140 (2026)

Improper conduct not authorized

✓ current as of May 2026

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Nothing in this chapter shall authorize a director, officer, shareholder, agent, or employee of a corporation organized under this chapter, or a corporation itself organized under this chapter, to do or perform any act which would be illegal, unethical, or unauthorized conduct under the provisions of the following acts: (1) Physicians and surgeons, chapter 18.71 RCW; (2) anti-rebating act, chapter 19.68 RCW; (3) state bar act, chapter 2.48 RCW; (4) professional accounting act, chapter 18.04 RCW; (5) professional architects act, chapter 18.08 RCW; (6) professional auctioneers act, chapter 18.11 RCW; (7) cosmetologists, barbers, and manicurists, chapter 18.16 RCW; (8) assisted living facilities act, chapter 18.20 RCW; (9) podiatric medicine and surgery, chapter 18.22 RCW; (10) chiropractic act, chapter 18.25 RCW; (11) registration of contractors, chapter 18.27 RCW; (12) debt adjusting act, chapter 18.28 RCW; (13) dental hygienist act, chapter 18.29 RCW; (14) dentistry, chapter 18.32 RCW; (15) dispensing opticians, chapter 18.34 RCW; (16) naturopathic physicians, chapter 18.36A RCW; (17) embalmers and funeral directors, chapter 18.39 RCW; (18) engineers and land surveyors, chapter 18.43 RCW; (19) escrow agents registration act, chapter 18.44 RCW; (20) birthing centers, chapter 18.46 RCW; (21) midwifery, chapter 18.50 RCW; (22) nursing homes, chapter 18.51 RCW; (23) optometry, chapter 18.53 RCW; (24) osteopathic physicians and surgeons, chapter 18.57 RCW; (25) pharmacists, chapter 18.64 RCW; (26) physical therapy, chapter 18.74 RCW; (27) registered nurses, *advanced registered nurse practitioners, and practical nurses, chapter 18.79 RCW; (28) psychologists, chapter 18.83 RCW; (29) real estate brokers and salespersons, chapter 18.85 RCW; (30) veterinarians, chapter 18.92 RCW.

[ 2012 c 10 s 38; 2011 c 336 s 503; 1994 sp.s. c 9 s 717; 1987 c 447 s 16; 1982 c 35 s 170; 1969 c 122 s 14.]

Notes:

*Reviser's note: The term "advanced registered nurse practitioner" was changed to "advanced practice registered nurse" by 2024 c 239 s 1, effective June 30, 2027.

Application—2012 c 10: See note following RCW 18.20.010.

Severability—Headings and captions not law—Effective date—1994 sp.s. c 9: See RCW 18.79.900 through 18.79.902.

Intent—Severability—Effective dates—Application—1982 c 35: See notes following RCW 43.07.160.

Notes of Decisions

Cited in 1 case, 2010–2010 · leading case: Columbia Physical Therapy, Inc. v. Benton Franklin Orthopedic Assocs., PLLC, 228 P.3d 1260 (Wash. 2010).

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Columbia Physical Therapy, Inc. v. Benton Franklin Orthopedic Assocs., PLLC, 228 P.3d 1260 (Wash. 2010). “The PSCA expressly provides that professional service corporations remain subject to the antirebate statute, RCW 18.100.140, thereby establishing that the antirebate statute’s terms are no longer limited to partnerships.”

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