Oasis Therapeutics – Nashua, New Hampshire Ketamine Clinics, Spravato Clinics

✓ Last verified: March 17, 2026 — Edited & verified by Angelica Bottaro for HealingMaps Editorial Staff

Known For: Two-location practice (Nashua and Concord) delivering one of New Hampshire’s most comprehensive interventional psychiatry menus — IV ketamine, Spravato, TMS, Stellate Ganglion Block, and mPNS — led by three board-certified physicians.

HealingMaps Take: Oasis Therapeutics is the most complete interventional psychiatry practice in New Hampshire and it is not particularly close. With three board-certified MDs on staff and a treatment menu that spans IV ketamine infusions, Spravato (esketamine nasal spray), TMS, Stellate Ganglion Block for PTSD, and magnetic peripheral nerve stimulation, Oasis offers breadth that rivals major academic medical centers. The Nashua location at 436 Amherst Street serves the entire southern New Hampshire corridor — easily accessible from Manchester, Merrimack, Milford, and communities along the Route 3 corridor. For patients in the region, Oasis eliminates the need to drive to Boston for advanced psychiatric treatments. The fact that they also treat conditions beyond depression — including chronic pain, nicotine dependence, substance use, and long-COVID — makes this a versatile practice for patients with complex presentations.

Market Position: Oasis Therapeutics is a Spravato-certified clinic in the Nashua metro. Spravato (esketamine) is the FDA-approved ketamine treatment that most commercial insurance plans cover after prior authorization — unlike cash-pay IV ketamine.

Ketamine Protocols Compared — What’s Offered at Oasis Therapeutics

Industry pricing reference. Oasis Therapeutics has not published specific per-session pricing — contact the clinic directly for a quote. The calculator above shows typical metro-level cost estimates across protocols, not this clinic’s specific prices.

What to Expect at Your First Oasis Therapeutics Appointment

1. Initial intake call — Insurance verification, prior authorization workflow (Spravato requires documentation of failure on at least two antidepressant trials), and clinical eligibility check. Call (888) 366-7210 to schedule.
2. Medical evaluation — in-person or telehealth psychiatric assessment, vitals check, and review of current medications with the Oasis Therapeutics clinical team.
3. First treatment session — supervised IV ketamine infusion in a private treatment room, lasting approximately 60–90 minutes (40-minute infusion + recovery). Sessions are held at 436 Amherst St, Suite 100, Nashua, NH 03063. You’ll have a comfortable chair or recliner, dim lighting, and direct medical monitoring throughout.
4. Recovery and follow-up — observation period after dosing, mood check-in with the clinical team, and scheduling your next session. Arrange for a ride home; do not drive for 24 hours after your IV session.

What to Ask on Your Oasis Therapeutics Consult Call

• How long has the Oasis Therapeutics clinical team been delivering ketamine therapy, and what specialty training do your providers hold?
• Walk me through Oasis Therapeutics’s Spravato prior authorization process versus your IV ketamine cash-pay or superbill workflow — which is the better fit for my insurance situation?
• Does Oasis Therapeutics require a referral from a current treating psychiatrist, and how do you handle outside-prescriber medication-management coordination?
• What does Oasis Therapeutics recommend for patients who don’t respond to the standard 6-session acute series?

Nashua Ketamine Market Snapshot

Sources: CDC PLACES 2023 (Hillsborough County, NH, crude prevalence) · U.S. Census ACS 5 Year · HealingMaps proprietary patient inquiry data.

• Adult depression in Hillsborough County, NH: 21.5%
• Frequent mental distress (14+ days per month): 15.3%
• Adults lacking health insurance: 7.4%
• Hillsborough County population: 422,733 · median household income $95,112
• Recent Nashua-area inquiries to HealingMaps: A growing stream of New Hampshire residents have recently contacted us seeking ketamine care

Behind this data: HealingMaps has analyzed 23,496 patient inquiries (Oct 2022 – Mar 2026), mapped 1,473 verified clinics across 3,142 counties, scraped 132 clinic pricing pages, and collected 658 practitioner survey responses. This snapshot reflects our multi-source methodology.

From the 2026 Ketamine Industry Report

Even Spravato copays are HSA and FSA-eligible — meaning the $0–$250 per-session cost that commercial insurance leaves you can often be paid with pre-tax dollars, reducing the effective out-of-pocket by your marginal tax rate. Ask your Spravato-certified provider to document the treatment as medically necessary for your records. Source: HealingMaps 2026 Ketamine Clinic Intelligence Report — drawn from 23,496 patient inquiries and 132 clinic website analyses.

Patient Questions about Oasis Therapeutics

This 6-question summary is matched to the protocols and conditions Oasis Therapeutics treats. Editorial responses are HealingMaps-authored, grounded in our 2026 Ketamine Clinic Intelligence Report.

What ketamine protocols does Oasis Therapeutics offer?

Oasis Therapeutics offers Spravato and IV ketamine — a 2-protocol practice. Patients can switch between or combine modalities without changing providers. Confirm specific dosing schedules and which protocols are recommended for your condition during your consult.

Does Oasis Therapeutics offer Spravato (esketamine)?

Yes — Oasis Therapeutics offers Spravato, which means they’re FDA REMS-certified and maintain the required two-hour in-office monitoring window after each dose. Spravato is the primary insurance-covered ketamine option for treatment-resistant depression. Worth confirming the prior-authorization timeline before booking your first session.

Is Oasis Therapeutics suited for treatment-resistant depression?

Oasis Therapeutics treats depression via Spravato (FDA-approved for TRD), and IV ketamine (off-label, evidence-based). The Spravato pathway is the most likely to obtain commercial insurance coverage. TRD is typically defined as two or more prior antidepressant trials without sufficient response — patients meeting that bar are best candidates here.

Does Oasis Therapeutics treat chronic pain conditions?

Yes — Oasis Therapeutics treats chronic pain. They use IV ketamine for pain, which typically means longer infusion times and higher cumulative doses than mental-health protocols. Common indications include complex regional pain syndrome (CRPS), fibromyalgia, and certain neuropathic pain syndromes. Pain pricing varies significantly by structure: per-infusion vs. multi-day inpatient packages — verify how this clinic structures their billing.

Does Oasis Therapeutics treat PTSD?

Yes — Oasis Therapeutics treats PTSD. Both Spravato and IV ketamine can be used for trauma. Ketamine for trauma differs from depression treatment: dosing is often lower per session, and pairing the protocol with trauma-focused therapy between sessions is common. A reasonable consult question: whether PTSD patients here typically use ketamine alone or alongside an outside therapist.

Can Oasis Therapeutics help with anxiety disorders?

Yes — Oasis Therapeutics treats anxiety, including generalized anxiety, social anxiety, and panic disorder. The evidence base for ketamine in anxiety is less robust than for depression, but it can be a meaningful option for patients who haven’t responded to SSRIs or benzodiazepines. Worth asking which of their protocols they typically recommend for anxiety-primary patients.

View all REMS-certified Spravato clinics in New Hampshire and across the United States.

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