Dr. Gruenn has offices in Los Angeles and Ojai. Dr.Gruenn sees patients in Los Angeles on Thursdays and in Ojai on Tuesdays. 


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 - Thursday  9:00 am to 4:00 pm 

Friday Both offices Closed 

Closed for lunch 12:30 pm to 1:30    

NEW Phone Hours  (unless closed for Holiday): 

Monday and Wednesday 10:00 am to 1:00 pm, Tuesday and Thursday   10:00 am to 1:00 pm, 2:00 pm to 4:00 pm 

Friday Closed 

HOLIDAY Closure 2022 

Memorial Day, Monday May 30

Independence Day, Monday July 4

Labor Day, Monday September 5

Wednesday November 23 - we close at 1PM

Thanksgiving Day, Thursday November 24 

Christmas Day, Open Monday December 26

HOLIDAY Closures 2023

New Years day, Open Monday January 2

Memorial Day, Monday May 29

Independence Day, Tuesday July 4

Labor Day, Monday September 4

Thanksgiving Day, November 23

Christmas Day, Monday December 25


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

When you become Dr. Gruenn's 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) 

Instructions for Patient Portal registration


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. 

Gwen & Amrit

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