Dr. Gruenn has offices in Los Angeles and Ojai.

He sees patients in Los Angeles on Thursdays

and in Ojai on Tuesdays. 

 

Office Hours 

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

Last Thursday of the month 9:00 am to 2:00 pm.

Not closed for lunch.

Closed for lunch other days 1:00 pm to 2:00 pm   

Fridays: both offices are closed 

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Phone Hours  

Monday- Thursday 10:00 am to 1:00 pm and  2:00 pm to 4:00 pm.

Last Thursday of the month: 10:00 am -2:00 pm not closed for lunch

Phone closed during Lunch 1:00 pm to 2:00 pm 

 

Phone

Los Angeles office:   310.699.4199

Ojai office:   805.633.9121

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Fax to both office is : 805-910-3486

 

Holiday Closures 

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We are closed Thanksgiving week - November 24, 2025 until November 28, 2025. 

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WE ARE CLOSED DECEMBER 22, 2025 UNTIL JANUARY 5, 2026​

Memorial Day

Independence Day

Labor Day

Thanksgiving 

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For frequently asked questions regarding appointments, changes, emergencies, lab results... please click FAQs  above

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Dr. Gruenn's Patient Portal   (established patients)

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Instructions for Patient Portal Registration  (new patients)​

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