Matthew K. Nienaber, DO
Santa Monica, CA 90403
The Doctors of Saint John's - Santa Monica Primary Care
1821 Wilshire Boulevard, Suite 100, Santa Monica, CA 90403

2026 Golden State Patient
Experience Award Recipient
The Golden State Patient Experience Awards is Providence’s California-wide program, recognizing providers in Northern and Southern California who consistently deliver outstanding patient experiences, based on patient feedback and experience scores.
Insurances Accepted
This information provides an overview of accepted insurance plan types for new patients. Coverage may vary by specific plan. Please verify with your insurance provider before visiting us for care. Established patients should call to verify insurance acceptance.
- TriWest - Tricare
- Blue Shield of CA HMO - Trio
- Cigna PPO
- Cigna HMO
- Aetna HMO
- United Healthcare HMO
- Health Net HMO
- HealthSmart (Interplan) PPO
- Humana Medicare Advantage
- Blue Shield of CA PPO
- Aetna Medicare Advantage PPO
- United Healthcare PPO
- SCAN Medicare Advantage
- Vivity by Anthem Blue Cross
- Blue Shield of CA Medicare Advantage
- Health Net PPO
- Anthem Blue Cross PPO
- US Family Health Plan - TriCare
- Aetna PPO
- Anthem Blue Cross HMO
- Blue Shield of CA HMO
- Multiplan PPO
- Coventry/First Health PPO
- No results found
Please contact your insurance provider to verify coverage.
You're not covered
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Aetna: 6013542
Anthem Blue Cross: GWR202
Blue Shield: 100322538002
Cigna:1491457002
HealthNet: 3717235718
Humana:435265
SCAN: 398542
United Healthcare : 14090739
About Matthew K. Nienaber
A West Coast native, born in the Bay Area and raised in the Pacific Northwest with one foot in the sand and one in the water. Caring and compassionate, working with his patients to provide individualized healthcare. With a strong passion for helping the underserved, he participates in medical missions to Africa, South America, and Mexico. Formerly a competitive dragon boat racer, who plays piano and bass, with an eye for restoring classic British race cars.
Western University of Health Sciences
2014
Arrowhead Regional Medical Center
2015
Arrowhead Regional Medical Center
Internal Medicin\e
2017
- American Osteopathic Board of Internal Medicine, Internal Medicine
1821 Wilshire Boulevard, Suite 100
Santa Monica, CA 90403
Providence Saint John's Health Center
Community Reviews
At Providence, we're dedicated to providing you quality, personalized health care. We are constantly striving to optimize your experience.
As part of ensuring you have a positive experience with Providence, our online provider directory includes ratings and patient comments for select providers. More about our survey.
Dr Nienaber is a kind and caring physician. He has been my primary care doctor for close to 10 years. Recently he supported my weight loss journey of 95 pounds with Zepbound which has improved my overall health. When my husband of 55 years passed away 6 months ago, Dr. Nienaber and the office tech staff who knew my husband helped me deal with my grief. Their efforts to comfort me meant a great deal.
Providence Patient
All exceptional
Providence Patient
Dr. Neinaber is an excellent doctor. His staff is top notch as well.
Providence Patient
Dr. Nienaber is fantastic. For years, he has been attentive and insightful. In fact he has probably saved my life more than once.
Providence Patient
Always happy with my doctor.
Providence Patient
The doctor is amazing. He actually cares. He listens to you. And answers your questions.
Providence Patient
All good!! From my very first meeting with Dr. Nienaber I feel extremely lucky to have been able to know that he is absolutely there for me, no matter what! Everything from his "bedside manner" to his consistency demonstrates that he is a very special health care provider and I am extremely grateful to be his patient!!!
Providence Patient
Dr. Nienaber is so patient and just fantastic.
Providence Patient
I have a complex medical diagnosis that requires a ton of doctors. Many don't listen. Many aren't informed with current best practices as it's a new diagnosis that wasn't around when they were in medical school. Dr Neinaber is great, and is fully transparent when he doesn't know something about this new complex syndrome, and we'll research together and talk through things. He always believes me, and he takes my opinions very seriously. He's a great doctor and really the only one I trust.
Providence Patient
Dr n always takes the time needed with his patients. He is also my husband's and moms dr. He listens and treats everyone with respect and tailors care to the individual
Providence Patient
Very good in all areas!
Providence Patient
Dr. Nienaber is very approachable, listens patiently to what I have to say and never makes me feel rushed.
Providence Patient
Mathew Nienaber is engaging genuinely concerned observant and gives good feedback!!
Providence Patient
Dr. Mathew is an extraordinary physician, his kindness and compassion are so appreciated
Providence Patient
Dr. Nienaber is excellent!
Providence Patient
DR. Nienaber is a gem. An authentic and caring physician. Listen's well and discusses treatment options.
Providence Patient
Excellent doctor
Providence Patient
Dr Neinaber is the best! Always listens, provides information if needed and very easy to communicate with, really like him!
Providence Patient
I have recommended Dr Nienaber several times on Nextdoor.
Providence Patient
Very helpful!!!
Providence Patient
Very happy with my Doctor!
Providence Patient
I so appreciate how he cares and listens. Compassion, sense of humor and real connection too with great knowledge. I am in a good space with my mental health and physical health and Dr. Neinaber has been part of my improvement.
Providence Patient
Dr. Nienaber is very competent helpful and friendly.
Providence Patient
Best doctor
Providence Patient
He's the best
Providence Patient
Very caring. Very knowledgeable. Good follow up on all health matters. Probably be the best doctor I've ever seen.
Providence Patient
Dr. Nienaber and his staff are first rate. Have been swing them for a few years now and everyone is consistently excellent.
Providence Patient
Dr. Nienaber is the greatest! I could go on and on but sum it up by saying that Dr. Nienaber is a consummate professional with excellent listening and diagnostic skills. Dr. Nienaber always takes his time with me and answers all my questions patiently and completely. If he doesn't have an immediate answer he makes a point of following up with any necessary research and gets back to me with an answer in a timely manner. I would recommend Dr. Nienaber to all my friends and family, for sure!
Providence Patient
Dr Nienaber is an outstanding physician and human being with expert knowledge and bedside manner.
Providence Patient
Dr Nienaber ROCKS. 10/10 PERFECT
Providence Patient
Dr. Nienaber has been my doctor for many years; to me, he is one of the best doctors I have ever seen in my life. Thank you, Doctor.
Providence Patient
Dr. Neinaber is an exceptional and compassionate doctor. He has a wonderful staff and I appreciate all their hard work.
Providence Patient
Dr. Nienaber is one of the best doctors I had in my life.He's competent, caring, and always tries to find the best solution for my health
Providence Patient
So iam happy with provider
Providence Patient
Dr. M. Nienaber is very kind, professional, and caring.
Providence Patient
The very best always
Providence Patient
This care provider has been exceptionally helpful in giving me specific simple exercises that have relieved me of slight back pain.
Providence Patient
I don't usually give top grades on surveys, but my visit was so smooth and informative that I can not think of a single thing that needs to be improved.
Providence Patient
Very good
Providence Patient
Always great !!
Providence Patient
I have been a patient at this office for many years and will stay forever because of the quality care I receive from everyone.
Providence Patient
ALWAYS happy with my visits with my doctor
Providence Patient
I'm truly grateful to Dr. Nienaber and the entire staff for their outstanding support. From the very beginning, they made me feel welcomed and well cared for. They were attentive, responsive, and always willing to take the time to answer my questions with patience and clarity. What stood out most was their genuine commitment to helping me succeed - I never felt like just another case, but rather someone they sincerely wanted to support. Their professionalism, warmth, and dedication made the entire experience smooth and reassuring, and I deeply appreciate the difference they made.
Providence Patient
Provided a personable, courteous and very knowledgeable and thoughtful about my care!
Providence Patient
Dr Nienaber is very knowledgeable and easy to talk to. Highly recommend -thank you so much
Providence Patient
Dr Nienaber is the Best Dr I have beenToo
Providence Patient
My doctor is kind and empathetic .We talked about not only my healthcare,But my life in the universal sense as well;Mind , body and spirit.This , in my humble opinion, is the way all physicians should practice medicine.
Providence Patient
Dr. Nienabor provided excellent advice and service at a time in my life which was very trying. I cannot say enough about the excellent service and caring attitude he displayed.
Providence Patient
There are never any surprises, they are always very nice and professional about what they do. I have never been disappointed, and will recommend them to anyone.
Providence Patient
DrNienaber, treated in a way that was more than just a patient. He really took his time with me.
Providence Patient
Top notch provider. Really gives you focused attention. Knows your background and provides genuine care.
Providence Patient
He takes time to discuss everything. He is very knowledgeable. He has a very friendly and outgoing manner.
Providence Patient
The provider has been absolutely perfect in all matters concerning my rather complicated health issues. I couldn't ask for better.
Providence Patient
The greatest staff and doctor ever !
Providence Patient
Dr. Nienaber is an amazing doctor!!!! I am grateful to God he is my primary doctor!! He definitely deserves a raise!!!
Providence Patient
I have mentioned in previous surveys how great the care is with Dr. Mathew and his staff. I wish all of my medical providers were as compassionate, understanding and concerned with regards to my health care as Dr. Mathew is to me.
Providence Patient
So far very good.
Providence Patient
The Best That Know My Body
Providence Patient
Perfunctory
Providence Patient
Exceptional service
Providence Patient
Great doctor
Providence Patient
Dr. Nienabor is an excellent doctor.
Providence Patient
Just a great doctor. Kind, caring, patient, and reliable.
Providence Patient
Best care ever, superb bedside manner, most attentive and helpful
Providence Patient
Dr. Neinaber put my mind at ease by explaining the meanings and implications of my recent CT results
Providence Patient
I love Dr Neinaber! He's always so personable and knowledgeable, highly recommend him!
Providence Patient
All good
Providence Patient
Thank you for your extraordinary care.
Providence Patient
Dr Nienaber is the best. He never feels rushed and always goes above and beyond to answer questions and concerns.
Providence Patient
I had a positive experience with Dr. Nienaber.
Providence Patient
Dr. Nienaber provided the best care possible for the patients
Providence Patient
Dr. Nienaber is always responsive to my concerns. I feel fortunate that he is my primary care provider.
Providence Patient
Personal, friendly physician
Providence Patient
Dr. Nienaber has always been a great doctor for me and my family !
Providence Patient
Best office very best Dr in years.
Providence Patient
Excellent care
Providence Patient
Dr. Nienaber is an extremely caring and knowledgable physician who takes the time to give his patients fantastic care.
Providence Patient
My doctor was incredible. He DID NOT rush me. Listened to me and explained things to me. He is a great asset to your practice. I only come for him.
Providence Patient
Dr Nienaber is special and deserves an outstanding bedside manner and seeks to understand award. Deserving of my trust.
Providence Patient
In and out in no time, friendly, courteous staff, Dr is wonderful.
Providence Patient
Dr Nienaber is the most caring professional around. I feel that I'm getting the best care possible!!
Providence Patient
Love this Dr's office.
Providence Patient
Extremely happy with the staff helpfulness and courtesy - extremely happy to have Dr. Nienaber as my physician.Only wish would be prompter email replies.
Providence Patient
After many years I finally have a primary physician that not only I hold in high respect but provides me exceptional quality service
Providence Patient
Conditions and Procedures
- Abdominal Cramps
- Abdominal Pain
- Abnormal Bowel Movement
- Abnormal Stool
- Abrasion
- Acne
- Actinic Cheilitis
- Acute Arthritis
- Acute Back Pain
- Aging
- Alcohol Dependency
- Allergic Conjunctivitis
- Allergic Contact Dermatitis
- Allergic Reaction
- Allergic Rhinitis
- Allergic Wheezing
- Allergies
- Altered Bowel Habits
- Anal Pain
- Anemia
- Angular Cheilitis
- Animal Bite
- Ankle Injury
- Ankle Instability
- Anorexia
- Anxiety
- Aphthous Ulcers
- Arm Pain
- Arm Weakness
- Arthralgia
- Asthma
- B12 Deficiency Anemia
- Back Injury
- Back Muscle Injury
- Back Muscle Pain
- Back Pain
- Bereavement
- Bilateral Knee Pain
- Birthmark
- Bleeding Hemorrhoids
- Blister
- Blood In Stool
- Blurred Vision
- Breast Lump
- Bright Red Blood Per Rectum
- Bronchitis
- Bruising
- Burns
- Cellulitis
- Cerumen Removal
- Chest Pain
- Chlamydia
- Choking Sensation
- Cholesterol Disorders
- Cholesterol Management
- Chronic Abdominal Pain
- Chronic Cough
- Chronic Diarrhea
- Chronic Disease Management
- Chronic Fatigue Syndrome (Cfs)
- Chronic Migraines
- Chronic Obstructive Pulmonary Disease
- Chronic Pain
- Claudication
- Cold Intolerance
- Cold Sore
- College Health
- Common Cold
- Concussion
- Concussion Testing
- Confusion
- Conjunctivitis
- Constant Nausea
- Constipation
- Contact Dermatitis
- Coping Skills
- Cough
- Cystitis
- Daytime Sleepiness
- Decrease In Appetite
- Dehydration
- Dementia
- Depressed Mood
- Dermatophytosis
- Diabetes Education
- Diabetes Management
- Diabetes Mellitus
- Diarrhea
- Diet And Exercise
- Diet And Nutrition
- Disability Evaluation
- Disorder Of Balance
- Distractible
- Diverticulitis
- Dizziness
- Drug Reaction
- Dry Nose
- Dry Scalp
- Dry Sinus
- Dry Skin
- Dyshidrosis
- Dyspepsia
- Dysphagia
- Dysphoria
- Dyspnea On Exertion
- Dysuria
- Ear Discharge
- Ear Drainage
- Ear Exam
- Ear Infections
- Ear Pressure
- Earache
- Eczema
- Elbow Pain
- Elbow Sprain
- Emphysema
- Employee Health
- Enlarged Prostate
- Environmental Allergies
- Epicondylitis
- Epigastric Pain
- Epistaxis
- Eructation
- Erythema
- Eye Infections
- Eye Pain
- Eye Strain
- Face Swelling
- Facial Nerve Palsy And Paresis
- Facial Pain
- Facial Tingling
- Falls
- Fasciculations
- Fatigue
- Fecal Incontinence
- Fever
- Fever With Chills
- Finger Pain
- First Degree Burns
- Flu Shot Vaccination
- Folliculitis
- Food Poisoning
- Foot Injury
- Foot Pain
- Frailty
- Frequency Of Urination
- Frequent Urinary Tract Infections
- Gastric Ulcer
- Gastroenteritis
- Gastroesophageal Reflux Disease
- General Well Visit
- Genital Herpes, Female
- Genital Herpes, Male
- Genital Warts
- Gluten Sensitivity
- Gout
- Grief
- Groin Mass
- Groin Pain
- Hand Injury
- Hand Pain
- Head Congestion
- Headache
- Health Maintenance
- Hearing Loss
- Heart Disease
- Heart Murmur
- Heart Racing
- Heat Intolerance
- Heel Pain
- Hematochezia
- Hematuria
- Hemoptysis
- Hemorrhoids
- Hepatitis A Vaccination
- Hepatitis B Vaccination
- Hernia
- Herpes
- Herpes Zoster
- Herpetic Whitlow
- Hip Pain
- Hirsutism
- Hoarseness
- Human Papilloma Virus (Hpv) Vaccination
- Hyperglycemia
- Hypertension
- Hypothyroidism
- Impacted Cerumen
- Impetigo
- Infectious Mononucleosis
- Influenza
- Ingrown Hair
- Ingrown Nail
- Insect Allergy
- Insulin Resistance
- Intention Tremor
- Interstitial Cystitis
- Intertrigo
- Iron Deficiency Anemia
- Itchy Ear
- Jaundice
- Joint Stiffness
- Joint Swelling
- Joint Warmth
- Keloid
- Keratin Cyst
- Keratitis
- Keratosis Pilaris
- Knee Click
- Knee Injury
- Knee Pain
- Labyrinthitis
- Lactose Intolerance
- Laryngitis
- Lateral Epicondylitis
- Leg Numbness
- Leg Pain
- Leg Weakness
- Lethargy
- Lifestyle Modification
- Lipomas
- Lower Back Pain
- Lump In Throat
- Lyme Disease
- Lymphadenopathy
- Measles Vaccination
- Medial Epicondylitis
- Memory Disorders
- Meningitis Vaccination
- Mens Health
- Migraine
- Mmr Vaccine
- Mood Symptoms
- Motion Sickness
- Mouth Bleeding
- Mouth Pain
- Mouth Ulcer
- Muscle Cramps
- Muscle Strain
- Muscle Weakness
- Musculoskeletal Pain
- Myalgia
- Nail Disease
- Nasal Congestion
- Nasal Obstruction
- Nausea
- Neck Muscle Injury
- Neck Pain
- Neck Sprain
- Noisy Breathing
- Norovirus
- Nose Pain
- Numbness
- Nutrition And Health
- Nutritional Counseling
- Obesity
- Odynophagia
- Optic Migraines
- Orthopnea
- Orthostatic Hypotension
- Osteoarthritis
- Osteopenia
- Osteoporosis
- Otalgia
- Otitis
- Overweight
- Palpitations
- Panic Reaction
- Paresthesia
- Paronychia
- Patellofemoral Syndrome
- Penile Bleeding
- Persistent Cough
- Pharyngitis
- Plantar Fasciitis
- Pleurisy
- Pleuritic Pain
- Pneumonia
- Pneumonia Vaccination
- Poison Ivy
- Poison Oak
- Polypharmacy
- Positional Vertigo
- Post Nasal Drip
- Prediabetes
- Preventive Medicine
- Problems With Smell And Taste
- Prostate Examination
- Prostate Specific Antigen Blood Test
- Pruritus
- Pulmonary Infections
- Pyelonephritis
- Rash
- Rectal Bleeding
- Rectal Pain
- Restless Legs Syndrome
- Rhinitis
- Rosacea
- Scab
- Scabies
- Scaly Skin
- Sciatica
- Scratchy Voice
- Seasonal Allergies
- Seborrheic Dermatitis
- Sensitive Skin
- Severe Asthma
- Sexually Transmitted Disease (Std)
- Shingles Vaccination
- Shortness Of Breath (Sob)
- Shoulder Pain
- Shoulder Sprain
- Shoulder Strain
- Sinus Pain
- Sinus Pressure
- Sinusitis
- Skin Abscess
- Skin Cancer Screening
- Skin Tag Removal
- Sleep Disorders
- Slowing Of Urinary Stream
- Smoker Cough
- Snoring
- Sore Throat
- Spider Bite
- Splinter Removal
- Sports Related Concussion Testing
- Sprain
- Sputum Production
- Stomach Cramps
- Stomach Pain
- Straining On Urination
- Strep Throat
- Stress Incontinence
- Stridor
- Stye
- Substance Addiction
- Sunburn
- Suture Removal
- Swallowing Problem
- Syncope
- Tachycardia
- Tension Headache
- Testicular Pain
- Throat Tightness
- Thumb Dislocation
- Thyroid Disorder
- Tick Borne Infections
- Tinea Corporis
- Tinea Pedis
- Tingling
- Tinnitus
- Tobacco Use Cessation
- Tongue Pain
- Tongue Swelling
- Tracheobronchitis
- Travel Medicine
- Traveler's Diarrhea
- Tremor
- Tuberculosis (Tb) Test
- Twitching
- Type 1 Diabetes
- Type 2 Diabetes
- Unsteady Gait
- Upper Back Pain
- Upper Respiratory Infection
- Urge Incontinence
- Urinary Hesitation
- Urinary Retention
- Urinary Tract Infection
- Urinary Urgency
- Urticaria
- Vaccinations
- Varicella
- Varicella Vaccination
- Vasovagal Syncope
- Vertigo
- Viral Conjunctivitis
- Visual Discomfort
- Visual Disturbance
- Vitamin D Deficiency
- Vitamin Deficiency
- Voice Problems
- Vomiting
- Warts
- Weakness
- Weight Loss
- Weight Problem
- Wellness
- Wheezing
- Wrist Pain
- Wrist Sprain
Great doctor
Providence Patient