Dr. Gruenn has offices in Los Angeles and Ojai.


Los Angeles office  310.699.4199

Ojai office  805.633.9121

Medical Emergencies, that cannot wait until next business day.

1. Go to nearest Emergency Room

2. Call Dr. Gruenn's Medical Emergency line 805.798.1006

Office Hours 

Monday - Wednesday  9:00 am to 4:00 pm (Ojai Office open but LA office only per appointment) 

Thursday 9:00 am to 1:30 pm (Ojai office). LA offie:  8:30 am 4:00 pm, but closed for lunch 12:30 pm to 1:30 pm at the LA office only.   

Friday Both offices Closed 

Phone Hours (unless closed for Holiday): 

Monday - Wednesday  10:00 am to 1:00 pm, 2:00 pm to 4:00 pm (Both offices) 

Thursday  9:00 am to 1:30 pm  (Ojai office) and  8:30  am to 4:00 pm (LA office) 

Friday Closed 

HOLIDAY Closure 2021 

Memorial Day, Monday May 31

Independence Day, Monday July 5

Labor Day, Monday September 6

Thanksgiving Day, Thursday November 25 

Christmas and New Years weeks open M-Th - however Dr. Gruenn will not see patients in Los Angeles Thursday December 30ieth. . You are welcome to come to Ojai that Thursday, or make a phone or Online visit. 

For frequently asked questions regarding appointment changes, emergencies, and lab result, etc., please click the FAQs button 

When you become Dr. Gruenns patient, you will receive an invitation to his Patient Portal. This is where you fill out/sign New Patient forms, can see your lab-results and other communication.

Dr. Gruenn's Patient Portal    (Established patients only) 


Are you faced with chronic health challenges? Do you strive to be optimally healthy? Then our integrated approach that combines Functional and Western Medicine will be for you. 


Medical History—Physical Exam,—Lab Tests

As a New Patient you will receive a Medical Workup that includes a medical history, physical exam, and conventional and functional lab tests. If indicated, Dr. Gruenn will evaluate you for...

  • Food and Environmental Allergies

  • Nutritional Deficiencies

  • Adrenal Health

  • Hormone Deficiencies

  • Gut Health (dysbiosis, SIBO, yeast, parasites)

  • Viral Infections

  • Immune Deficiencies

  • Neurotransmitter Deficiencies

  • Chemical and Heavy Metal Toxicity

  • Genetic variations

  • Body Fat Percentage

  • Mitochondrial Imbalances


Once your test results are in, you will attend a therapy-planning visit where Dr. Gruenn will explain your test results and provide you with a comprehensive Treatment Plan, specifically tailored to your needs. It might include:

  • Medications (as needed)

  • A Nutritional Eating Plan

  • Vitamin / Mineral Injections

  • Bio-Identical Hormone Replacement

  • Herbal Medicine

  • Immune Therapies

  • Chelation Therapy for Heavy Metal Detoxification

  • Trigger Point Injections

  • Longevity Medicine

  • Adrenal Support

  • Detoxification

  • Lifestyle Modification

  • Medical Weight Loss

  • Nutritional Supplements, as needed