NurseCheck · On-Call & Standby

What Does “On Call” Actually Require?

The same two words are doing six different jobs. Texas law defines on-call time, leaves the prescheduled version out of the mandatory-overtime calculation, and then prohibits using it as a substitute for mandatory overtime. The federal conditions of participation for critical access hospitals use it three more times — once for a practitioner who may be thirty minutes away, once for a nurse who has to be in the building, and once for a doctor who only has to be reachable. This page sets out what each text requires. It does not decide what your arrangement amounts to.

Tex. Health & Safety Code 258.001(3), 258.002, 258.003(c), 258.004(b); 42 CFR 485.608(b), 485.618(d), 485.618(f), 485.631(a)(4)-(a)(5) — On-call time and standby — six texts, six different things Official text

Check your situation

Answer the questions below. The result shows the rules that turn on your answers, the statutory text behind them, and the facts you still need to confirm yourself.

1. Which “on call” are you asking about?

This is not a formality. Chapter 258 and part 485 use the same words for different things, and the answer decides which body of text is operative.

2. Is anyone paid for being available?

Sec. 258.001(3) defines on-call time as time spent by a nurse who is not working but who is compensated for availability. Compensation is one of the two elements — without it, the definition may not reach the arrangement at all.

3. Was the on-call period prescheduled?

Sec. 258.002 excludes prescheduled on-call time from the mandatory-overtime calculation. Sec. 258.003(c) prohibits using on-call time as a substitute — without that qualifier. The difference matters.

4. What actually happened during the period?

The chapter describes a nurse who is not working. Once someone is called in, or required to stay in the building, the question changes.

5. What kind of facility is this?

§ 485.618 and § 485.631 sit in subpart F of part 485, which governs critical access hospitals. They do not apply to a hospital that is not a CAH.

What turns on your answers

What to document

A record-keeping aid built from what the law makes relevant.

If you need to escalate

The text, verbatim

Everything above is derived from the text reproduced here. Read it before relying on any summary.

§ 258.001(3) Definition — on-call time

Effective 2009-09-01
(3) "On-call time" means time spent by a nurse who is not working but who is compensated for availability.

Official text This is the only definition of on-call time in chapter 258. It has two elements and they are joined by 'but', so both matter. Added by Acts 2009, 81st Leg., R.S., Ch. 742 (S.B. 476), Sec. 1, eff. 1 September 2009. Chapter 258 was amended in 2025 by Acts 2025, 89th Leg., R.S., Ch. 398 (H.B. 2187), but the amendment credits published for this subdivision are unchanged.

§ 258.002 Mandatory overtime — what is left out of the calculation

Effective 2009-09-01
For purposes of this chapter, "mandatory overtime" means a requirement that a nurse work hours or days that are in addition to the hours or days scheduled, regardless of the length of a scheduled shift or the number of scheduled shifts each week. In determining whether work is mandatory overtime, prescheduled on-call time or time immediately before or after a scheduled shift necessary to document or communicate patient status to ensure patient safety is not included.

Official text Two things are excluded here, and the drafting leaves a question open. The first exclusion is qualified: it says 'prescheduled on-call time'. The second is 'time immediately before or after a scheduled shift necessary to document or communicate patient status to ensure patient safety'. Whether the words 'necessary to document or communicate patient status to ensure patient safety' qualify only the second item or both of them is not something the sentence settles on its face. Both readings are shown on this page rather than one being chosen.

§ 258.003 Prohibition of mandatory overtime

Effective 2009-09-01
(a) A hospital may not require a nurse to work mandatory overtime, and a nurse may refuse to work mandatory overtime. (b) This section does not prohibit a nurse from volunteering to work overtime. (c) A hospital may not use on-call time as a substitute for mandatory overtime.

Official text Subsection (c) is the whole of what chapter 258 says about using on-call time as a replacement. It uses the defined term 'on-call time' without the word 'prescheduled' that appears in Sec. 258.002. Nothing in the chapter explains the difference, and this page does not reconcile it.

§ 258.004(b) Exceptions — good faith effort when the (a)(3) exception applies

Effective 2009-09-01
If a hospital determines that an exception exists under Subsection (a)(3), the hospital shall, to the extent possible, make a good faith effort to meet the staffing need through voluntary overtime, including calling per diems and agency nurses, assigning floats, or requesting an additional day of work from off-duty employees.

Official text These four lanes are conditions attached to one exception. They are not a general duty to try them. Where no (a)(3) exception has been determined, the chapter does not impose them.

§ 485.618(d)(1) Emergency services personnel — on call and reachable, with an arrival window

Effective 1993-05-26
(1) Except as specified in paragraph (d)(3) of this section, there must be a doctor of medicine or osteopathy, a physician assistant, a nurse practitioner, or a clinical nurse specialist, with training or experience in emergency care, on call and immediately available by telephone or radio contact, and available on site within the following timeframes: (i) Within 30 minutes, on a 24-hour a day basis, if the CAH is located in an area other than an area described in paragraph (d)(1)(ii) of this section; or (ii) Within 60 minutes, on a 24-hour a day basis, if all of the following requirements are met: (A) The CAH is located in an area designated as a frontier area (that is, an area with fewer than six residents per square mile based on the latest population data published by the Bureau of the Census) or in an area that meets the criteria for a remote location adopted by the State in its rural health care plan, and approved by CMS, under section 1820(b) of the Act. (B) The State has determined, under criteria in its rural health care plan, that allowing an emergency response time longer than 30 minutes is the only feasible method of providing emergency care to residents of the area served by the CAH. (C) The State maintains documentation showing that the response time of up to 60 minutes at a particular CAH it designates is justified because other available alternatives would increase the time needed to stabilize a patient in an emergency.

Official text On-call time is the compliant answer to this paragraph: the text itself prescribes being on call. The three conditions in (d)(1)(ii) are cumulative — the frontier or remote designation, a State determination that a longer response time is the only feasible method, and State documentation justifying it at that particular CAH.

§ 485.618(d)(2) A registered nurse conducting a medical screening examination — must be on site

Effective 1993-05-26
(2) A registered nurse with training and experience in emergency care can be utilized to conduct specific medical screening examinations only if— (i) The registered nurse is on site and immediately available at the CAH when a patient requests medical care; and (ii) The nature of the patient's request for medical care is within the scope of practice of a registered nurse and consistent with applicable State laws and the CAH's bylaws or rules and regulations.

Official text The contrast with (d)(1) sits inside one paragraph. (d)(1) is satisfied by someone who is not there, provided they can be reached and can arrive within the window. (d)(2) is not: it requires the nurse to be on site and immediately available at the moment the patient requests care. On-call is the answer to (d)(1) and is not the answer to (d)(2).

§ 485.618(d)(3) Temporary use of a registered nurse on the (d)(1) list

Effective 1993-05-26
(3) A registered nurse satisfies the personnel requirement specified in paragraph (d)(1) of this section for a temporary period if— (i) The CAH has no greater than 10 beds; (ii) The CAH is located in an area designated as a frontier area or remote location as described in paragraph (d)(1)(ii)(A) of this section; (iii) The State in which the CAH is located submits a letter to CMS signed by the Governor, following consultation on the issue of using RNs on a temporary basis as part of their State rural healthcare plan with the State Boards of Medicine and Nursing, and in accordance with State law, requesting that a registered nurse with training and experience in emergency care be included in the list of personnel specified in paragraph (d)(1) of this section. The letter from the Governor must attest that he or she has consulted with State Boards of Medicine and Nursing about issues related to access to and the quality of emergency services in the States. The letter from the Governor must also describe the circumstances and duration of the temporary request to include the registered nurses on the list of personnel specified in paragraph (d)(1) of this section; (iv) Once a Governor submits a letter, as specified in paragraph (d)(3)(iii) of this section, a CAH must submit documentation to the State survey agency demonstrating that it has been unable, due to the shortage of such personnel in the area, to provide adequate coverage as specified in this paragraph (d).

Official text What this substitutes is the person, not the posture. The RN is admitted to the (d)(1) list, and (d)(1) still requires being on call, immediately reachable, and able to arrive within the window. Reading (d)(3) as permitting an RN to be on site instead would be reading into it something it does not say.

§ 485.618(d)(4) When a (d)(3) request takes effect

Effective 1993-05-26
(4) The request, as specified in paragraph (d)(3)(iii) of this section, and the withdrawal of the request, may be submitted to us at any time, and are effective upon submission.

Official text Both the request and its withdrawal are effective on submission, not on approval. Nothing in this paragraph provides for a CMS decision.

§ 485.618(f) Coordination with emergency response systems — reachable, with no arrival window

Effective 1993-05-26
(f) Standard: Coordination with emergency response systems. The CAH must, in coordination with emergency response systems in the area, establish procedures under which a doctor of medicine or osteopathy is immediately available by telephone or radio contact on a 24-hours a day basis to receive emergency calls, provide information on treatment of emergency patients, and refer patients to the CAH or other appropriate locations for treatment.

Official text A third posture again. (d)(1) requires reachability plus an arrival window; (f) requires reachability and states no arrival window. (f) is also narrower in who it accepts: a doctor of medicine or osteopathy only, not the PA, NP or CNS who appear in (d)(1).

§ 485.631(a)(4) Practitioner availability — at all times the CAH operates

Effective 1993-05-26
A doctor of medicine or osteopathy, nurse practitioner, clinical nurse specialist, or physician assistant is available to furnish patient care services at all times the CAH operates.

Official text This paragraph uses neither 'on call' nor 'on site'. Whether being available to furnish patient care is satisfied by someone who is reachable but not present is not stated here, and this page does not answer it.

§ 485.631(a)(5) Nurse on duty — whenever the CAH has one or more inpatients

Effective 1993-05-26
A registered nurse, clinical nurse specialist, or licensed practical nurse is on duty whenever the CAH has one or more inpatients.

Official text The personnel named in 485.618(d)(1) and the personnel named here overlap only at the clinical nurse specialist. A practitioner who is on call under (d)(1) is not, by that fact alone, a nurse on duty under this paragraph.

§ 485.608(b) Compliance with State and local laws and regulations

Effective 1993-05-26
(b) Standard: Compliance with State and local laws and regulations. All patient care services are furnished in accordance with applicable State and local laws and regulations.

Official text This is the paragraph that carries state law back into the federal conditions of participation. It is not 485.631(b), which concerns the responsibilities of the doctor of medicine or osteopathy. Federal permission to staff something by on-call does not come with a federal licence to do so in a way state law forbids.

How the regulator reads it

These are official readings, not statutory text. They are labelled as such wherever they appear.

Regulator reading — not statutory text
SB 476 defines on-call time as the "time spent by a nurse who is not working but who is compensated for availability" and cannot be substituted for mandatory overtime.

Source: Texas Board of Nursing Bulletin, January 2010, Volume 41 No. 1 Last verified 2026-09-17

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