Internal Medicine in Prescott, AZ - Find a Doctor | Banner Health

Internal Medicine • Prescott, AZ

Home/Prescott/Internal Medicine/Internal Medicine in Prescott, AZ - Find a Doctor | Banner Health

About

Call clinic Visit website

Clinic Type

Internal Medicine

Address

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Phone

480-827-5500

Email

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Opening Hours

Not published — contact the clinic to confirm hours.

Website

https://doctors.bannerhealth.com/search?display_location=Prescott%2C+AZ&distance=10&location=Prescott%2C+AZ&page=9&provider_fields=-clinical_keywords&relationship=&search_alerts=false&shuffle_seed=85efe2b3-524f-407a-99ec-ebe6d8dec201&sort=distance&specialties=Internal+Medicine

Services Offered

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Team

Jennifer Khong — DO
Chelsea Carlson — DO
Hadil Owaynat — DO
Swetha Yenduru — MD
Ola-Oluwakiti Alabi — DO
Valentina Gomez Aristizabal — DO
Noah Choi — MD
Matthew Au — MD

Insurance & Payment

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Languages Spoken

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Social Media

Twitter Youtube Facebook Instagram

Photos

What Patients Say

Overall sentiment across review platforms: mixed

Banner Health doctor search (Internal Medicine near Prescott, AZ): 4.6 (131 ratings); 4.8 (1850 ratings); 4.9 (1887 ratings) (131; 1850; 1887 (ratings shown on Banner Health page))
Vitals (Dr. Doreen A. Slabaugh): 4.6 out of 5 (35 ratings (with 26 written reviews))
Healthgrades (Dr. Nicolas Giuliano): 5.0 out of 5 (21 reviews)
WebMD (Dr. Allen Gardner): 4.5 out of 5 (19 ratings)

Patients praise

Providers described as listening to concerns and not rushing appointments (example reviews for Dr. Giuliano and Dr. Slabaugh)
Clear explanations of conditions/treatments and thorough follow-up (example reviews for Dr. Giuliano and Dr. Slabaugh; WebMD perspective for Dr. Gardner)

Common complaints

Billing and insurance/administrative issues reported for Banner Health (BBB complaints; Yelp; PissedConsumer)
Slow processing and prolonged resolution times mentioned in complaints
Some negative experiences in reviews related to perceived poor examination/communication in specific cases (from third-party review sites)

"“Dr. Guilliano was excellent! He was patient, listened to my concerns & then discussed my options.”"

— Healthgrades review excerpt for Dr. Nicolas Giuliano, DO

"“Felt provider genuinely cared about me and my concerns/health. Did not feel rushed as she spent ample quality time with me.”"

— Vitals review excerpt for Dr. Doreen Slabaugh, DO

"“Went to a doctor visit… the clinic did not provided my insurance correctly… and are trying to bill me for the insurance part too… Everything moves so slow and takes literally weeks…”"

— BBB complaint excerpt for Banner Health

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. Own this clinic? Claim or correct this listing.