Battery Backup for Houston Dialysis Clinics and Surgery Centers: What the CMS Rule Really Requires

This post is about the in-center clinic: the outpatient dialysis facility and the ambulatory surgery center (ASC) that a patient drives to. It is not about home dialysis, which we cover in battery backup for home dialysis patients in Houston. Here the question is what the federal rule asks of a clinic during an outage, and what a battery can honestly do for one.

The short answer surprises people. The CMS Emergency Preparedness rule makes a clinic plan for a power failure. It does not tell a dialysis clinic or an ASC to own a generator or a battery. In Texas, the generator rule for dialysis comes from state law instead.

Key Takeaways

• CMS requires dialysis facilities and ASCs to plan for power failures, drill the plan, and keep a communication plan. The text of 42 CFR 494.62 names "equipment or power failures" but mandates no backup system.
• Hospitals are different: 42 CFR 482.15 requires alternate energy sources. Outpatient clinics are not held to that text.
• Texas dialysis facilities answer to Health and Safety Code 251.017, which offers generator, portable generator and partner-facility options.
• One residential-class controller can carry the front office, network, lights, medication refrigeration and phones. It cannot carry water treatment, treatment chairs or surgical HVAC.

What does the CMS Emergency Preparedness rule actually require of a clinic?

CMS finalized the rule in 2016 for 17 provider and supplier types, and it includes ESRD facilities and ASCs (CMS, Providers and Suppliers Impacted by the Emergency Preparedness Rule). The rule rests on four core elements. A clinic must run a risk assessment, write an emergency plan, adopt policies and procedures, and keep a communication plan with training and testing (CMS, Core EP Rule Elements).

For a dialysis facility, the policies must cover "fire, equipment or power failures, care-related emergencies, water supply interruption, and natural disasters." The facility must also arrange to send patients to other dialysis providers and run exercises at least annually, with a community-based full-scale exercise every two years (42 CFR 494.62, Cornell LII).

Read that closely. It says plan for power failure. It does not say have power.

Does CMS require a generator or battery at a dialysis clinic or surgery center?

No. When we read the regulation text for ESRD facilities (42 CFR 494.62) and for ASCs (42 CFR 416.54), neither one contains an alternate source of energy mandate. CMS also relaxed subsistence-needs policies for outpatient providers when it finalized the rule, per the CMS summary of the rule and its Federal Register notice.

Compare the hospital text. 42 CFR 482.15 requires hospitals to have alternate sources of energy to hold safe temperatures, emergency lighting, and fire detection and alarm systems, and it ties generator testing to NFPA 99, 110 and 101.

That asymmetry is the whole story. A clinic can be fully compliant with CMS and still go dark in the first hour of an outage. Compliance means the plan exists and was drilled. It says nothing about whether the lights stay on. We are not lawyers, and nothing here is regulatory advice, but the text is plain on this point.

So where does Texas set a power standard for dialysis?

State law does. Texas Health and Safety Code 251.017 requires each ESRD facility to adopt an emergency contingency plan for essential building systems, and it lets the facility choose a path (Texas Health and Safety Code 251.017; text also at FindLaw):

• On-site generator. A generator meeting the statute's standards, at least 24 hours of fuel on site, and at least 24 hours of potable water for the water treatment system.
• Portable generator contract. Arrangements for a portable generator, battery-powered lighting that lasts at least 1.5 hours, and potable water, put into action when an outage may exceed 24 hours.
• Partner facility. A contract with another ESRD facility within 100 miles to treat patients, where that facility has battery-powered emergency lighting.

A correction worth making: the 72-hour bill

After Hurricane Beryl, Texas Senate Bill 2919 proposed raising the generator duration from 24 to 72 hours and explicitly allowing "an on-site battery-powered generator." Its bill analysis described that. But the bill's legislative history shows it stalled in the Senate. The last recorded action was "placed on intent calendar" on May 22, 2025, and nothing shows it was enacted. The 24-hour language is what we found in the statute text.

If you read that Texas now requires 72 hours of battery or generator power at dialysis clinics, that is not what the record shows. Check the current statute with your compliance lead before you rely on either number.

What happened to Houston clinics when the grid failed?

Hurricane Beryl is the local case. As of the afternoon of July 10, 2024, more than 1.5 million electricity customers in the Houston area were without power (Texas Tribune). Harris Health reported that many patients arriving at its hospitals were "seeking dialysis since their normal providers still don't have power," and Ben Taub saw 320 emergency room patients in a day, 34% above a typical high-volume day (ABC13, July 12, 2024).

That is a clinic-side failure showing up as a hospital problem. We looked for ESRD Network or kidney-community data on missed treatment sessions during Beryl and did not find a public figure, so we are not quoting one. If a number surfaces, it belongs here. Until then, the ABC13 report is the documented signal.

A composite Houston dialysis clinic, hour by hour

This is a composite, not a real customer, and it is illustrative only. Picture a freestanding outpatient dialysis clinic in the Houston metro. The grid drops mid-afternoon in a storm. The clinic follows its plan: it stabilizes patients, calls its partner facility, and starts transfers.

What stops first is everything the plan did not account for. The front desk loses the network, so schedules and records are out of reach. Lighting in the lobby and hallways fades. The medication refrigerator warms. Phones, the very tool the communication plan depends on, may die with the router.

Notice what the CMS-style plan covered: who calls whom, who moves where. What it left open is whether the building can keep its own small systems alive while that happens. That gap is what a battery is for.

What can one Eos controller carry, and what can't it?

Here is the honest boundary. An Eos commercial system has one Smart controller delivering 11.5 kW continuous and 17.1 kW surge, with battery modules scaling usable energy. The Commercial Essential configuration, for example, pairs four modules (35.04 kWh usable) with one controller. Those figures come from our commercial plans.

What one controller is well suited to protect at an outpatient site:

• Front office, scheduling and EMR access
• Network, router, phones and the communication plan's hardware
• Lighting on a protected circuit
• Medication and sample refrigeration
• Door access, alarms and basic monitoring

What exceeds a residential-class controller:

• Reverse osmosis water treatment and the pumps that feed a dialysis floor
• Treatment chairs and machines running concurrently
• Surgical suite HVAC and sterilization equipment at an ASC

Do we recommend a battery as a substitute for the generator, fuel or partner-facility path Texas law describes? No. We are not telling you a battery satisfies a CMS or state requirement, and we never will. A battery sits next to your plan, covering the loads a generator is too loud, too slow or too much trouble to serve.

There is one more practical difference. A battery needs no fuel run and makes no exhaust, which is why it suits the small, always-on systems like networks and refrigeration. A generator suits the heavy loads. Many clinics will want both, with the battery on the circuits that must never blink.

How does an ASC differ from a dialysis clinic?

An ambulatory surgery center sits under 42 CFR 416.54. That section covers evacuation, sheltering, medical documentation and volunteer coordination, with the same annual exercise cycle. Our read of its text finds no alternate energy requirement, and Texas Health and Safety Code 251.017 applies to ESRD facilities, not ASCs.

So an ASC has even less written about power. Its practical exposure is the surgical suite itself, where HVAC, lighting and equipment are heavy loads. Many ASCs will want a hospital-grade generator for the suite and a battery for administrative and cold-chain loads. If your center is licensed under other rules, ask your accreditor.

For related sizing logic in smaller clinics, see our posts on urgent care clinics, medical and dental practices and physical therapy and chiropractic clinics. For the wider picture, start with commercial battery backup for Texas businesses.

A short checklist before you call anyone

1. Ask your compliance lead which framework applies. CMS, Texas statute and your accreditor are three different documents.
2. List loads by criticality. Which circuits must not drop, and which can wait?
3. Measure, don't guess. Pull a month of interval data or put a logger on the panel. Sizing from measured load beats any rule of thumb.
4. Separate the heavy loads. Water treatment, chairs and surgical HVAC are a generator conversation.
5. Document it. A plan that names what the battery covers, and what it does not, survives a survey better than a vague one.

Or call Eos at 833-989-3737 to talk through your setup with an installer.

Frequently asked questions

Does the CMS emergency preparedness rule require a dialysis clinic to have a generator?

No. The text of 42 CFR 494.62 requires policies for power failures, patient transfer arrangements and annual exercises. It names no generator or battery mandate. Texas statute sets the generator options for dialysis facilities in the state.

Does Texas require 72 hours of backup power at dialysis clinics?

Not that we could confirm. SB 2919 proposed 72 hours, but its history shows no passage after May 22, 2025. The statute we read still uses 24 hours of fuel and water.

Can a battery satisfy a regulatory requirement for my clinic?

We don't claim that, and you shouldn't assume it. Whether any equipment satisfies a CMS, state or accreditor requirement is a decision for your compliance officer and the authority that surveys you. A battery is a practical layer for specific loads.

What does one Eos controller protect at a clinic?

One controller delivers 11.5 kW continuous and 17.1 kW surge. That fits a front office, network, lighting, refrigeration and communications. It does not fit water treatment, treatment chairs or surgical HVAC, which need a different design. See Eos commercial plans.

Is this regulatory or medical advice?

No. The scenario above is a composite for illustration. Regulations change, and facilities differ, so confirm requirements with your compliance lead, your accreditor and the cited sources. For the home side of dialysis, read our home dialysis guide.