Dr. Gruenn has offices in Los Angeles and Ojai.


Los Angeles office 310.699.4199

Ojai office 805.633.9121

Office Hours 

Monday - Wednesday  9:00 am to 4:00 pm 

Thursday 9:00 am - 1:00 pm (LA office until 4:00 pm)

Friday Closed 

Phone Hours: 

Monday - Wednesday  10:00 am to 1:00pm, 2:00 pm to 4:00 pm

Thursday  10:00 am to 1:30 pm (LA office until 4:00pm) 

Friday Closed 


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 if you are a LA patient, can make appointments. At this time, Ojai patients must call the office or email to make appointments. 

Dr. Gruenn's Patient Portal   


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


When you make your first appointment, we'll give you access to the New Patient forms at our online Patient Portal. Convenient and easy.



When you make your first appointment, we'll give you access to the New Patent  forms at our online Patient Portal. Convenient and easy. 




12301 Wilshire Blvd. Suite 315

Los Angeles, CA  90025

ph 310.699.4199

efax 805.910.3486

© 2020 Hans D. Gruenn M.D.


530 W Ojai Ave. Suite 107

Ojai, CA 93023

ph  805.633.9121 

efax 805.910.3486


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