Dr. Gregg Hartman, MD

Dr. Gregg Hartman, MD

Orthopedic Surgery  |  
Male  |  
Age 51
Insurances AcceptedSave
Dr. Gregg Hartman, MD is an orthopedic surgery doctor who practices in Thousand Oaks, CA. He is 51 years old and has been practicing for 25 years.

2230 Lynn Rd Ste 220

Thousand Oaks, CA 91360

Contact Information

Insurance Accepted

  • Aetna
  • Anthem Blue Cross Blue Shield
  • Blue Shield of California
  • Cigna
  • First Health (Coventry Health Care)
  • Health Net
  • Medicare
  • MultiPlan
  • Tricare

*Please verify this information when scheduling an appointment.

Learn about Dr. Hartman

Be confident in your decisions by checking out your provider's top areas of care, education, patient reviews and more. Learn about finding the right doctor for you

Top Care Areas


See how frequently Dr. Hartman performs your care needs compared to other doctors.

Joint Pain
very high
more than 98% of peers
Shoulder Tendinitis and Tenosynovitis
very high
more than 94% of peers
Shoulder Disorders
very high
more than 91% of peers

Dr. Hartman's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.

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  • Orthopedic Surgery
  • Orthopedic Knee Surgery
  • Orthopedic Shoulder & Elbow Surgery

Board Certifications

  • Orthopedic Surgery
    Accredited by: American Board of Orthopaedic Surgery*

Conditions Treated

  • Adhesive Capsulitis
  • Ankle Fracture
  • Ankle Sprain and Achilles Tendon Sprain or Rupture
  • Ankle Sprains and Strains
  • Anterior Cruciate Ligament (ACL) or Posterior Cruciate Ligament (PCL) Tear
  • Arthritis of the Elbow
  • Autoimmune Diseases
  • Back Pain
  • Bone Disorders
  • Broken Arm
  • Bursitis
  • Carpal Tunnel Syndrome
  • Chronic Neck Pain
  • Clavicle Fracture
  • Complications of Joint Prosthesis
  • De Quervain's Disease
  • Degenerative Disc Disease
  • Difficulty With Walking
  • Elbow Bursitis
  • Elbow Injuries
  • Enthesopathy of Hip (incl. Trochanteric Bursitis)
  • Femur Fracture
  • Foot Conditions
  • Foot Fracture
  • Fracture
  • Gait Abnormality
  • Glenoid Labrum Tear
  • Hammer Toe
  • Hand Conditions
  • Hand Fracture
  • Herniated Disc
  • Hip Fracture
  • Hip Pointer Injuries
  • Hip Sprain
  • Internal Derangement of Knee
  • Intervertebral Disc Disease
  • Joint Pain
  • Knee Dislocation
  • Knee Disorders
  • Knee Fracture
  • Knee Sprain
  • Lateral and Medial Epicondylitis (Tennis and Golf Elbow)
  • Leg Fracture Above Knee (incl. Hip)
  • Leg Fracture Below Knee (incl. Ankle)
  • Limb Pain
  • Low Back Pain
  • Lumbar Spine Fracture
  • Lupus
  • Medial Collateral Ligament (MCL) Sprain
  • Neck Muscle Strain
  • Non-Unions and Malunions of Fractures
  • Osteoarthritis
  • Osteoarthritis of Ankle and Foot
  • Osteoarthritis of Hand or Wrist
  • Osteoarthritis of Hands
  • Osteoarthritis of Hip
  • Osteoarthritis of Hip and Thigh
  • Osteoarthritis of Knee
  • Osteoarthritis of Shoulder
  • Osteopenia
  • Patellofemoral Pain Syndrome or Knee Pain
  • Pathological Spine Fracture
  • Pelvic Fracture
  • Peripheral Nerve Disorders
  • Pyogenic Arthritis
  • Radiculopathy (Not Due to Disc Displacement)
  • Rotator Cuff Tear
  • Runner's Knee
  • Sciatica (Not Due to Disc Displacement)
  • Scoliosis
  • Shoulder Dislocation
  • Shoulder Disorders
  • Shoulder Impingement Syndrome
  • Shoulder Tendinitis and Tenosynovitis
  • Spinal Stenosis
  • Spine Deformities
  • Spine Disorders
  • Spine Fractures, Traumatic
  • Spondylitis
  • Spondylolisthesis
  • Spondylosis
  • Sprains and Strains (incl. Muscle Tear)
  • Systemic Chondromalacia
  • Systemic Sclerosis
  • Tibia and Fibula Fractures
  • Trigger Finger
  • Wrist Fracture


Read More


  • ACL Surgery
  • Arthroscopic Shoulder Surgery
  • De Quervain's Release
  • Dressing and-or Debridement of Wound, Infection, or Burn (incl. Negative Pressure Wound Therapy)
  • Excision of Scapula, Clavicle, Rib, or Sternum
  • Foot and Ankle Fracture Treatment, Open
  • Foot and Ankle Fracture and Dislocation Treatment
  • Fracture Care
  • Hand and Wrist Fracture Treatment, Closed
  • Hand and Wrist Fracture Treatment, Open
  • Hand and Wrist Fracture and Dislocation Treatment
  • Hip Arthroscopy
  • Hip Fracture and Dislocation Treatment
  • Hip Fracture and-or Dislocation Treatment, Closed
  • Hip Fracture and-or Dislocation Treatment, Open
  • Joint Drainage
  • Knee Arthroscopy
  • Knee Dislocation Treatment
  • Knee Surgery
  • Knee and Leg Fracture and Dislocation Treatment
  • Knee and Lower Leg Fracture Treatment, Closed
  • Knee and Lower Leg Fracture Treatment, Open
  • Resection or Ablation of Bone Tumor, Partial or Complete Resection of Bone, Debridement of Bone
  • Rotator Cuff Surgery
  • Separated Femoral Epiphysis Treatment
  • Shoulder Fracture Treatment
  • Shoulder Fracture and Dislocation Treatment
  • Trigger Point Injection
  • Viscosupplementation With Hyaluronate

Background Check

0 Malpractice Claims

No malpractice history found for California.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • Uc Santa Barbara
    Undergraduate School | Graduated 1988
  • Tulane University School Of Medicine
    Medical School | Graduated 1992
  • University New Mexico
    Internship Hospital | Completed 1993
  • University New Mexico/Univ New Mexico Hospital
    Residency Hospital | Completed 1997
  • Los Angeles Ortho Institute
    Fellowship Hospital | Completed 1998

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Hartman has no media or publications listed.

Languages Spoken

  • English
  • Spanish

Memberships & Professional Affiliations

  • California Orthopaedic Association, Member

Dr. Hartman's Reviews

Likelihood of recommending Dr. Hartman to family and friends
based on 44 total reviews (24 with comments)
Dr. Hartman Says:

I appreciate your time in submitting a patient survey. If you received great service and attention please tell a friend. If you did not, please tell me or my staff. We are committed to providing you the best care.

Dr. Hartman's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    10 to 15 minutes
Patient Comments (24)
in Camarillo, CA |
First time to see Dr. Hartman. Wow, what a well run office from the receptionist to Dr's assistant, to Dr. Hartman, to the clerk that checked me out. Everyone was very efficient, friendly, helpful and caring. I'm impressed! I am glad I found Dr. Hartman.
in Simi Valley, CA |
I would definitely recommend Dr. Hartman to family and friends. He listened to exactly what my symptoms were and gave me a diagnosis right away. In addition, he offered multiple options to help me. I chose surgery. It was done within a week and I was healed and completely back to living life normally in about 2 - 3 weeks! Thank you Dr. Hartman!
in Fountain Valley, CA |
Dr. Hartman has operated on both of my shoulders now and I continue to be impressed by him. He favors rehab over surgery when it's a viable option. Then he takes as much time as needed to explain it to me in English. I was able to email him questions later that he answered. Before surgery, he seemed to really care about how I was feeling. Afterward, he explained what he found, what he did, and what I should expect going forward as well as how long it will take to get there. Great care!
in Simi Valley, CA |
I am so happy I went away from SCOI to Hartmans office. Excellent reception, scheduling, treatment. What a pleasant change! Dr Hartman treated my very well, explained things very well. Great guy.
in Simi Valley, CA |
Dr. Hartman was very thorough, professional and caring with my wife from her initial visit through her surgery and in her post op visits. As the husband of a very sensitive wife I would highly recommend Dr. Hartman and his services.
in Simi Valley, CA |
Doctor Hartman is a wonderful doctor. He is knowledgeable, friendly, personable, and a skilled surgeon. I had a torn meniscus, causing me much pain, and he was able to expedite my MRI and move my surgery date up to the same week. As for the surgery, total time in the operating room was about 30 minutes. When I recovered from the anesthesia, I was able to walk without assistance, and without pain! I am very grateful for his professionalism, care, and kindness. You will like him too.
in Thousand Oaks, CA |
Highly recommend Dr. Hartman. The staff was great and my torn bicep tendon is back to normal
in Simi Valley, Ca |
Dr Hartman is both professional and personable. His degree of caring is evident from his first introduction. I was suffering with a knee issue of sudden onset. He was empathetic while clearing involving me in the decision in course of action. I come from a family of physicians and worked in health care for 40 years. Dr Hartman greatly impressed me. He was kind enough to wait for me at the end of a very long day, staying after hours just so he could personally tend to my treatment. Awesome 4 sure
Canoga Park, CA |
Dr. Hartman performed arthroscopic knee surgery more than ten years ago for me and all is well. Recently had surgery for my right handed wrist (de Quervain syndrome) and three months into my six months total recovery all is well and I am in a much better place as far as pain and usability of my hand/wrist.
in Camarillo, CA |
I recommend Dr. Hartman to my family and friends for any orthopedic needs as he is a competent and caring physician. He assess his patients medical issues and provides appropriate medical care. I trust Dr. Hartman because he explains the options for treatment and makes you feel his top priority during you appointment. Caring , compassionate and a veryprofessional physician! He is #1!
in Newbury Park, CA |
I am a patient with a complicated history and numerous medical issues. Dr. Hartman is very caring, compassionate, and usually runs right on time. He is knowledgeable about the many possibilities that can cause problems. He is not one to rush you into surgery, instead will try different conservative measures to reduce pain and cure the problem. He takes the time to listen to what ails you.
in Moorpark, CA |
What do you say about Dr. Hartman that will describe accurately this brilliant, professional, thoughtful, respectful, accommodating, compationate, kind, wise, direct, honest, reliable, trustworthy , and all around a really nice guy? He really is the best. Dr. Hartman will take the time explaining and teaching you about your ailments, he will listen to you and actually HEAR you, and treat you as an equal partner in any decision making. Best Doctor ever! Thank you Dr. Hartman!
in Newbury Park, CA |
Fantastic experience....Dr. Hartman is a class act, his bed side manner is an A+ and his level of medical expertise sets the bar very high for other surgeons. Dr. Hartman makes you feel very comfortable throughout your entire procedure and never leaves wondering what is being done.
in Camarillo, CA |
Dr. Hartman and his entire staff provided excellent care, service, and professionalism throughout my treatment. From diagnosis, to surgery, to post surgery Dr. Hartman kept me apprised of what the issues were, details of the surgical procedure, and what to expect after. The Oxnard physical therapy facility is great and the professional team there are fully committed to getting me back a full range of activity. I have had great results and on road to full recovery. Thank You!
in Simi Valley, CA |
Dr. Hartman was excellent. He was very thorough in evaluating my condition and explaining all choices to resolve. It made my decision easier having all the information I needed. I had elbow reconstruction, he explained how the surgery was to be performed and aftercare. My results were great!
in Simi Valley, CA |
By far the best surgeon I have ever had. I have had many surgeries but Dr. Hartman was more informative and told me exactly what was going to happen. I wasn't in nearly as much pain as any other of my surgeries even though my shoulder surgery that he did was the most invasive. He can be a little arrogant at times but he knows exactly what he is doing and i trust him completely.
in Simi Valley, CA |
I would absolutely recommend Dr. Hartman to anyone needing an orthopedic surgeon. My son used him 2 years ago with excellant results. He not only repaired my badly torn rotator cuff, I recovered way before scheduled. I was released to go back to work almost 2 months early! He and his office were always professional and helpful. Norma was on top of all the insurance and disability paperwork. I work for local Dentists in town, and have already recommeded him to several patients.
in Simi Valley, CA |
I had a torn meniscus and needed a bursa sac removal. There were no complications with surgery. Started physical therapy one week later. My therapist was Breanna and she is great. I feel great. Dr. Hartman was excellent and very caring. I would definitely recommend him and my therapist.
Dr. Hartman is an excellent doctor and communicator. I have had five knee surgeries, four with other doctors, and the last one with Hartman. By far, Dr. Hartman is the best doctor I have seen. He tried many different strategies to help my knee and only after six months of trying everything, he recommended surgery. I love the fact that he cares about his patients and he doesn't rush into surgery. He doesn't use Doctor terms to explain things. He uses words we can actually understand. GREAT GUY!!!
in Simi Valley, CA |
Dr. Hartman explains everything to you, he takes his time with you. He really listens to you. He is a fantastic doctor, he really cares about you. I would rated him as a 10. Ten (10) being the best. Thank you Dr. Hartman everything. I tell everyone great you are. Lisa Svoboda
Simi Valley, CA |
Dr. Hartman is the best doctor I have ever met, and I have met quite a few in my lifetime. He spent a lot of time with me explaining the structures of the knee and what I had injured. He is very good at explaining things and making sure I fully understood what is going on in my knee. He answered all of my questions and I never felt rushed. I fortunately did not need surgery, but if I ever do, Dr. Hartman will absolutely do it.
in Thousand Oaks, CA |
My husband asked for treatment options of strained knee ligaments and arthritis. The only one provided was an expensive brace, He asked that the doctor be there for the fitting to see that it was done right and provide information but it was turned over to his assistant--not a doctor. The brace was late and the assistant would not help; there were two instances of this. The brace was not fitted correctly, adjustments, locks, cleaning, warranty and information booklets were not pointed out.
in Simi Valley, CA |
There truly isn't enough space here to praise Dr. Hartman for the time he spent with me to help with complications from two T.K.R. replacements and other issues from two other doctors. Resulting in a medial and lateral meniscus tear in the other knee. The expertise, and care performing surgery resulted in not even needing P.T. after!! :) Even tho T.K.R. surgery isn't in his wheel house, he went out of his way and after 5 years of misery..... it is wonderful to walk normal again. Your my hero!
Thousand Oaks, CA |
Poor communication, excessive length of time to get treatment and responses, attitude of doctor that he could not be bothered with patient needs, my way or the highway approach
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Now Accepting New Patients
Dr. Hartman accepts 9 insurance carriers
  • Aetna
  • Anthem Blue Cross Blue Shield
  • Blue Shield of California
  • Cigna
  • First Health (Coventry Health Care)
  • Health Net
  • Medicare
    Special Needs Plan SNP
  • MultiPlan
  • Tricare
    TriCare for Life

*Please verify this information when scheduling an appointment.

Hospitals where Dr. Hartman has admitting privileges

Los Robles Hospital and Medical Center
215 W Janss Rd
Thousand Oaks, CA 91360
View Hospital Profile
Adventist Health Simi Valley
2975 Sycamore Dr
Simi Valley, CA 93065
View Hospital Profile