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Clinic Type

Neurology

Address

12555 Garden Grove Blvd, Unit 401, Garden Grove, CA 92843

Phone

(657) 377-0587

Email

Opening Hours

Mon-Fri 08:00-17:00; Sat Closed; Sun Closed

Services Offered

  • General neurology
  • Headache and migraine care
  • Parkinson’s disease and movement disorders
  • Epilepsy
  • Dementia and memory disorders
  • Multiple sclerosis
  • Neuromuscular disorders
  • Sleep disorders
  • Traumatic brain injury/concussion
  • Neurodiagnostic testing

Technology & Equipment

  • advanced diagnostic testing
  • nerve blocks
  • trigger point injections
  • deep brain stimulation ( Parkinson’s )

Team

  • Neurology specialists, null — General Neurology and subspecialty care

Insurance & Payment

Credit card, Insurance, Self-pay

Languages Spoken

  • English (assumed)

Current Offers

New patient specials — null

FAQs

What are the clinic hours?

Office hours are Monday through Friday, 8:00 AM to 5:00 PM; Saturday and Sunday are Closed.

Do you have more than one location?

Yes. Orange County Garden Grove; Inland Empire Chino; Long Beach.

How can I book an appointment?

Visit the site and use the Book an Appointment links or call the clinic.

What is the contact phone number?

(657) 377-0587

Photos

What Patients Say

Overall sentiment across review platforms: positive

  • Healthgrades: 4.9 out of 5 stars (based on 30 ratings) (30 ratings)
  • Birdeye: 5 out of 5 stars (6 reviews)
  • rater8: 5.00 out of 5 stars (16 ratings)

Patients praise

  • knowledgeable and professional physicians
  • compassionate and attentive care
  • clear communication of complex details
  • patient-centered approach
  • welcoming office environment

Common complaints

  • difficult to schedule appointments
  • unfriendly staff
  • long wait times
  • potential for seeing residents instead of primary physician
  • concerns over treatment plans signed off by the doctor but managed by residents

"Very kind, patient, listens, and willing to help his patient figure out what is troubling them. I can’t say enough, how wonderful it feels to have him as our neurologist."

rater8 patient review

"The office did try to fit me in the next day to see Dr. Nacionales, but I had to work. Now I have to wait two months and am still in pain! Dr. Nacionales signed off on the resident's treatment plan. I don't trust Dr. Nacionales now."

Healthgrades patient review

Synthesized from public review platforms as of Jul 10, 2026 — sources: [1][2][3][4].

Information sourced from the clinic's website as of July 10, 2026.

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Garden Grove, CA·Neurology

Garden Grove Hospital Medical Center (a Prime Healthcare Services facility) is a 167-bed acute-care hospital located at 12601 Garden Grove Boulevard, Garden Grove, CA 92843. The center provides 24/7 emergency services, medical/surgical care, ICU, diagnostic services (including an MRI), and both inpatient and outpatient services. It serves the Garden Grove community and employs hundreds of staff and affiliated physicians. If you’re seeking a specific provider at this hospital, you can contact the hospital directly at 1-714-537-5160 or info@gardengrovehospital.com to obtain a current list of affiliated providers and schedule opportunities.

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Garden Grove, CA·Neurology

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