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Dr. Nicholas Mexas

Internal Medicine
Vacaville, CA
25 years experience male

Locations

Kaiser Permanente

Vacaville, CA

Address

1 Quality dr, Vacaville, CA, US
Directions

Practice website

Insurances accepted

Kaiser Permanente Insurance Company

About

Bio

I was born and raised in Athens Greece coming to the US at age 20. I did my Undergraduate work at University of Maryland and Med school at University of New England. After finishing my 3 year Internal Medicine Residency at Christina Hospital in DE, I practiced as a Hospitalist for 7 years at Grand Strand Regional Medical Center in Myrtle Beach SC. I then joined the USAF where I served as a Flight Surgeon for 3 years and was subsequently accepted at a prestigious Fellowship program in Hyperbaric Medicine and Wound care. I served as a Hyperbaric Med Clinic Director for 2 years at Travis AFB in CA. I have now decided to separate from active duty, to join the Air National Guard in GA. Private practice will include Internal Medicine and Hyperbarics/ Wound care

Specialties
Doctors may have more than one area of specialty interest. Board certification in a specialty area means the doctor has completed formal training and has practice experience in that specialty, and has passed the certification examination from the corresponding accredited medical specialty board.

Internal Medicine

Aerospace Medicine

Undersea and Hyperbaric Medicine

Languages spoken

Greek

Doctor Q&A

93 Answers
7 Agrees
The number of answers this doctor has agreed with.
A 30-year-old male asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Easy fix: What you're doing is called a modified Valsalva maneuver. It is performed to force the Eustachian tude (a tube connecting the middle ear to our throa... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 47-year-old male asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
No worries: This a mild and probably non-specific liver function test elevation (assuming you have no symptoms). No remedy or meds needed. Avoid alcohol, lose ... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A member asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Most likely not: Asymmetry (irregular borders) is one of the features which makes doctors worry about a mole being malignant. However, some people do tend to grow irr... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 54-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
That's high: It is common for our blood pressure to vary throughout the day but I have to admit those numbers are pretty high. Assuming you are using the same cuf... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 25-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Yes: His doctors will wait until he has fully recovered and he is strong enough to receive chemo. Chemo will kill cancer cells but will also weaken the bo... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 25-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Cause it: Flagyl is used to treat a variety of infections from bacteria, parasites and even amoeba. Specifically in the GYN area, it is used to treat Pelvic In... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 22-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
It's possible: It is possible to get pregnant from having unprotected sex without your partner finishing. Chances not zero but much less if you are on a birth cont... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 37-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Simple: Depends how little is little and where it is located. In general, keep it clean and occluded, change dressings as needed depending on how much draina... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 31-year-old male asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Could be: Depending how much alcohol you are consuming it could certainly cause these liver test abnormalities. Usually the AST would be much higher than the A... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 23-year-old male asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Premature beats: You are having early beats which are causing the heart to skip the next beat. This is a very common and mostly benign phenomenon in people with norma... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 50-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Absolutely: In general, I recommend having any changing skin lesion evaluated by your doctor.
Created for people with ongoing healthcare needs but benefits everyone.
A 20-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Scary: All symptoms point to a the fact that you are having some type of tachy-arrhythmia (fast abnormal heat rhythm). Given what you're describing, your bo... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 62-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Yes: An elevated TSH suggests low thyroid (hypothyroidism) hormone levels in your body. Therefore, thyroid hormone supplementation Synthroid (thyroxine) m... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 27-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Why worry??: Why are you worried about it? You doctor can easily assess your symptoms (if any) and do blood tests to see if you have any thyroid issues. IF you do... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 37-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Not clear: I would definitely make sure your Thyroid hormone levels are well regulated and this is simply done with a blood test. All psychotropic drugs can inte... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 19-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Possible: Assuming that his oral lesion was herpes, it would be possible for him to transmit the virus to that area of your body through oral sex. However, Her... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
It's possible: If you just stopped them, your blood pressure will return to the levels it was before, maybe worse. However, if you start watching your diet and lose... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 56-year-old male asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Depends: Usually these inhaled medications are used on an as needed basis and the frequency depends on how sick the person is. Commonly, they could be used ev... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 19-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Sinus issues: Some of the more common causes of loss of taste and smell are tobacco use, pollutants, the common cold or chronic sinus problems, allergies, medicatio... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 30-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
More pain: Pain in the area and maybe some bleeding. The surgeon will be more specific on post-op symptoms and things to watch for.
Created for people with ongoing healthcare needs but benefits everyone.
A 28-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Of course not: Sounds like something has affected your stomach (virus vs. type of food you ate). If symptoms went away I would not worry about it but if there's per... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 22-year-old male asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Just fine: I wouldn't worry about lowering the top number any more. Cont with exercise, healthy diet and focus on keeping those numbers close to these values as... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 30-year-old male asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Pre and post: Post-workout meal is indeed the most important meal of the day. Your muscular supply of glycogen is drained, making your muscles hungry for nutrients... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 26-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Not initially but...: Contraindicated in initial treatment of acute pericarditis as they can delay ventricular remodeling, cause dependency on the medication to prevent a r... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 18-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Too thin??: It is not totally abnormal for someone to be hungry every couple of hours. It usually occurs in young people and ones with high metabolisms (athletes... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 20-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
How low is low?: It's normal for young people to have blood pressure on the low side. Certainly, if your BP gets too low it could explain your symptoms. Of course th... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 34-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Bad week!!: Sounds like you're having a string of bad luck. None of these should be serious enough to cause any long term troubles for you. Except maybe the low... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 42-year-old male asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Safe: Protein supplements are a safe way to increase your protein intake along with a healthy diet. This is assuming you are a healthy person with no under... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 18-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Gotta sleep: I'm sure the doc went over all the proper sleep hygiene techniques with you, excluded medial issues and any type of sleep disorder which may be preve... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 25-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Yes: EKG and ECHO are very good tests to evaluate for underlying electrical and structural heart disease. However, both of them are a snap shot of your he... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 38-year-old male asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Probably: 52 BPM should be a normal resting heart rate especially for someone who is on a b-blocker (cardicor) as long as you have no symptoms such as weakness,... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 46-year-old male asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Yes: It can cause liver function test abnormalities. Usually, it is mild and patients can cont to stay on the medication with some monitoring. Of course,... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 46-year-old member asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Used for prevention: When it comes to diving, pressure equalization tubes (PE tubes) are usually used to prevent tympanic membrane damage from the pressure changes of divi... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 32-year-old member asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
It depends: Safe time periods between your last dive and flight vary depending on how many dives you did and how aggressive your dives were (how deep and how long... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 22-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
No swelling: Diving should have no affect on the thyroid gland itself, would not cause shrinking or swelling or cause it to go hyper or hypo active. As long as yo... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 25-year-old member asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Few exceptions: Hyperbaric Oxygen Treatment HBO or HBO2T is a treatment whereby the patient breaths 100% Oxygen under a higher than atmospheric pressure, usually 2 at... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 37-year-old member asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Dangerous: While scuba diving, you breath in pressurized air. If you come up too fast, the pressurized air in your lungs will expand too fast for your body to c... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A male asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Need more info: It's a kidney function test and It is definitely outside the range of "normal". I I would need a lot more history about her and previous similar test... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 23-year-old male asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Normal rate: As long as you are not stressed out, studying by itself should have no affect on your heart rate. Hopefully you re not drinking too much coffee or ta... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 58-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Probably med related: Cymbalta (duloxetine) has been known to cause ejaculation problems but I'm not aware of Neurontin doing it. Timing can be of help..if symptoms starte... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 25-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
It could: Costochondritis does cause chest pain and will get better with Aleve (naproxen). However, it does not explain the palpitations and strange sensations... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Don't worry: It's such a small dose and you took for such a short time, I expect that you will have no symptoms from stopping it cold turkey.
Created for people with ongoing healthcare needs but benefits everyone.
A 19-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Normal: It is common for our heart rate to fluctuate depending on activity, anxiety, just being nervous about something, or taking certain medications. Top h... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 38-year-old member asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
No: No change in the size of solid organs is seen from diving
Created for people with ongoing healthcare needs but benefits everyone.
A 46-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Local or systemic: Could be related to local disease process like sinus or nasal infection or more a more systemic process such as flu or other infection, dehydration et... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 16-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Flu like: About two thirds of the people who are infected never notice any symptoms, or have mild symptoms and never even get treatment. Common initial symptoms... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 24-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Yes: Sounds like you're pretty active into fitness and protein should be a big part of your diet. The amount of protein you take daily depends on your goa... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 54-year-old male asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
It shouldn't: Norvasc (amlodipine) is a commonly prescribed and in general well tolerated BP medication. It can cause some peripheral edema but has no diuretic eff... Read More
Created for people with ongoing healthcare needs but benefits everyone.
A 16-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Certainly: Make sure you see a doc (if you haven't already) because some of these infections can get very serious
Created for people with ongoing healthcare needs but benefits everyone.
A 21-year-old female asked:
Dr. Nicholas Mexas
Internal Medicine 25 years experience
Probably normal: If the bleeding stopped within reasonable time and it only happened once, I would not worry about it. Bleeding like that happens commonly without hav... Read More
Created for people with ongoing healthcare needs but benefits everyone.

Testimonials
Recommendations and Thank you notes are endorsements given from patients or other doctors.

1
Recommendations
98
Thank you notes
HealthTap member
Mar 31, 2015
Dr. Mexas is an amazing doctor! #nationaldoctorsday2015 #virtualflower1
HealthTap member
This made me feel good. Thanks! I was worried because I heard it sticks in fat cells which I unfortunately have a lot of. Do you think this will happen with me and delay the process?
HealthTap member
This was very helpful. Thanks! I appreciate the help! Thank you so much. Your advice was very helpful!
HealthTap member
This was very helpful. Thanks! Thanks for the prompt help! Very helpful and reassuring!

Education & Training

Medical/Graduate school

UNIV OF NEW ENGLAND
Graduated 1998MD

Residency

CHRISTIANA CARE HEALTH SERVICES, INC.
Completed 2001

Residency

US School of Aerospace Medicine
Completed 2012

Residency

Brooks City AFB, TX
Completed 2008

Awards

HealthTap Founding Doctor

Affiliations

Undersea & Hyperbaric Medical Society
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