Dr. Lillian DeCosimo, MD


Obstetrics & Gynecology | Female

Inova Medical Group - Dulles South 24801 Pinebrook Rd Ste 202 Chantilly, VA 20152 Get Directions
Dr. Lillian DeCosimo, MD

Dr. Lillian DeCosimo, MD is an obstetrics & gynecology doctor who practices in Chantilly, VA. She is 51 years old and has been practicing for 31 years. Dr. DeCosimo is affiliated with Inova Fairfax Hospital, Inova Loudoun Hospital and Inova Fair Oaks Hospital.

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Dr. DeCosimo's Care Philosophy

Comprehensive Gynecological health care for women of all ages. Caring and compassionate care with the goal to form a trusting and lasting bond with patients. Assisting women with making the right choices regarding their Gynecological care. Dr. DeCosimo has the latest information and treatment options, including minimally invasive gynecological procedures.

Dr. DeCosimo's Experience

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Languages Spoken

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Memberships & Professional Affiliations

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Visiting Dr. DeCosimo

Dr. DeCosimo accepts 13 insurance carriers

Dr. DeCosimo is now accepting new patients
Inova Medical Group - Dulles South24801 Pinebrook Rd Ste 202
Chantilly, VA 20152
This provider offers the following appointment availability:
Same Day
(703) 722-2510Get Directions

Affiliated Hospitals

Hospital Quality
Check out the quality of care at the 3 hospitals where Dr. DeCosimo has admitting privileges.

Dr. DeCosimo's Reviews

Likelihood of recommending Dr. DeCosimo to family and friends
based on 23 total reviews (11 with comments)
Dr. DeCosimo's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    16 to 30 minutes
Patient Comments (11)
in Chantilly, VA |
I have had great experiences with Dr. DeCosimo. She is very easy to talk to, listens to your concerns and is very responsive with followups to tests and emails. I was thrilled to find she can do blood work in the office through Quest so I didn't have to make a trip to a Quest facility. I'm very glad to have found her and will recommend her to everyone.
Reston, VA |
My appointment with Dr. DeCosimo was the worst I've ever had in my life. I came in because of a positive pregnancy test - her staff was unable to correctly administer the same test in her office and her response was that the home test was wrong. When the blood test confirmed the next day they never apologized. When I email her 3 days later saying that I thought I was having a miscarriage, she never responded. She could have cared less; she was cold and impersonal.
Chantilly, VA |
Dr. DeCosimo was very friendly when I went to see her after my PCP referred to her but she wasn't a great doctor. She didn't know why I was there, she got confused my lab test result with other pt's result, and the worst part is ... the test that she did, it didn't have adequate sample to run the test but the office charged me for the expensive test and they told me everything was OK. It took me a year to realize that I need to repeat the same test again because the mistake of Dr. D.
in Fairfax, VA |
After our appointment was set up and confirmed weeks in advance we called to ensure that we provide the relevant information in advance especially the insurance info a we just changed the provider and we don't have actual card. Ans: Just come in, we'll sort it then. Upon visiting we were sent away due to absence of the actual card. We explained again that we've changed the provider and have all the info needed. Their response then, 'We don't have time to call insurance company'. Wasted 3 hours!!
Dunn Loring, VA |
I went to Dr. DeCosimo yesterday for my first visit. It was for my annual, routine care. She was VERY helpful in helping me understand menopause. She is the first doctor I've been to in the past 5 years who agreed with me that the only way to determine if you are actually in menopause is to have my hormone levels checked. I was very appreciative of her no-nonsense demeanor and approach to my concerns.
Alexandria, VA |
She is knowledgeable in her field but leaves much to be desired in her bedside manner. She always seems to be in a rush - much like herding cows. She doesn't seem to be a good listener nor does her office seem to be very organized.
in Fairfax, VA |
I went to Dr DeCosimo with a gyn concern that had been going on for years. She listened and then explained to me what was going on and what my options were. She was respectful of my decision and scheduled me for surgery. Surgery day was a breeze and she did an amazing job. Scaring is almost non existent. Follow up was great. I recommend fully!!
in Chantilly, VA |
Dr. DeCosimo delivered my daughter 13 years ago & it was an amazing experience. In 2009, we moved out of the area, but upon returning to VA this year, I went to see her for my annual exam. Dr. DeCosimo was just as friendly, knowledgeable and helpful as before. There was minimal wait time, her staff was very professional and the office was clean & comfortable. She had great suggestions for some issues I am dealing with. I would highly recommend her to family & friends.
in Chantilly, Va |
Her bed side manner was amazing and she was extremely patient and understanding!
in Alexandria, VA |
I first saw Dr. Decosimo about 2 years ago for menopause symptoms. Her advice at the time seemed to be what she would do , not what was best for me. She seemed to always be in a rush, and her manner was always like she had an answer to your question before you asked. Her response to questions was never timely and I always had to call to get her to respond to my concerns. Maybe my timing was wrong, but I switched to another doctor because the rapport was not there.
Only works 3 days a week.
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Dr. DeCosimo's Care Philosophy

Comprehensive Gynecological health care for women of all ages. Caring and compassionate care with the goal to form a trusting and lasting bond with patients. Assisting women with making the right choices regarding their Gynecological care. Dr. DeCosimo has the latest information and treatment options, including minimally invasive gynecological procedures.

Dr. DeCosimo's experience matches your search based on the following criteria:

  •  Based on total number of patients treated over the last 12 months
  •  Specializes in Obstetrics & Gynecology
  •  Board certified in Obstetrics & Gynecology
  •  No malpractice claims found
  •  No sanctions found
  •  No board actions found

Awards & Recognition

  • Awards & Honors
    • Healthgrades Honor Roll
    • Best Resident Gynecological Laparoscopic Surgeon Award by The Society of Gynecologic Laparoscopic Surgeons, 1996
    What is a recognized doctor
  • Media & Publications

    Dr. DeCosimo has no media or publications listed.

Background Check

  • 0
    Malpractice Claims

    No malpractice history found for Virginia.

    What is medical malpractice
  • 0

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

    What is a sanction or disciplinary action
  • 0
    Board Actions

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

    What are board actions

Board Certifications

Why It Matters: Dr. DeCosimo's Board Certifications

Board certification should be one of your top considerations when choosing a doctor. Board certification is an official recognition given to doctors who have met specific requirements set by national medical specialty boards in the... More

  • Obstetrics & Gynecology

Conditions Treated

  • Abdominal Disorders
  • Abnormal Menstruation
  • Asherman Syndrome
  • Asymptomatic Post-Menopausal Status
  • Bacterial Vaginosis
  • Bartholin's Cyst
  • Blood Disorders
  • Bone Disorders
  • Breast Diseases
  • Cancer
  • Cervical Cancer
  • Cervical Polyps
  • Chronic Interstitial Cystitis
  • Dysmenorrhea
  • Ectopic Pregnancy
  • Endometriosis
  • Excessive Menstrual Bleeding
  • Female Genital Disorders
  • Female Incontinence
  • Female Infertility
  • Female Orgasmic Disorder
  • Female Pelvic Disorders
  • Female Sexual Arousal Disorder
  • Female Urinary Stress Incontinence
  • Fibrocystic Breast Disease
  • Galactorrhoea - Hyperprolactinaemia
  • Genital Warts
  • Genitourinary Infection
  • Gynecologic Cancer
  • Gynecologic Disorders
  • Hormone Imbalance
  • Hyperlipidemia
  • Hypertension
  • Incontinence
  • Infertility
  • Irregular Periods
  • Lichen Sclerosis Et Atrophicus
  • Mastodynia
  • Menopausal and Postmenopausal Disorders
  • Menopause
  • Menstrual Cramps
  • Menstrual Disorders (incl. Dysmenorrhea)
  • Multiple Miscarriages
  • Osteopenia
  • Osteoporosis
  • Ovarian Cysts
  • Overactive Bladder
  • Pediatric Urinary Tract Infection (UTI)
  • Pelvic Pain
  • Perimenopause
  • Polycystic Ovarian Syndrome
  • Pregnancy
  • Premature Ovarian Failure
  • Premenstrual Dysphoric Disorders
  • Premenstrual Syndrome
  • Rectocele
  • Sexual Desire Disorders
  • Sexual Disorders
  • Sexual Dysfunction
  • Sexually Transmitted Diseases (STDs)
  • Symptomatic Menopause
  • Trichomoniasis
  • Tubal Adhesion
  • Tubal Block
  • Tubal Ligation Syndrome
  • Urinary Disorders
  • Urinary Urgency
  • Urine Retention
  • Uterine Diseases
  • Uterine Fibroids
  • Uterine Hemorrhage
  • Uterine Polyp
  • Uterine Prolapse
  • Vaginal Candidiasis
  • Vaginal Discharge
  • Vaginal Disorders
  • Vaginal Dryness
  • Vaginal Prolapse
  • Vaginal and Pelvic Prolapse
  • Vaginismus
  • Vaginitis and-or Vaginosis
  • Vulvar Diseases
  • Vulvar Lesion
  • Vulvar Neoplasms
  • Vulvar Vestibulitis
  • Vulvitis
  • Vulvodynia
  • Vulvovaginitis


  • Medical School
    Universidad Mundial Dominicana, School Of Medicine

    Graduated in 1986

  • Internship Hospital
    Providence Hospital

    Completed in 1993

  • Residency Hospital
    Providence Hospital

    Completed in 1994

    Washington Hospital Center

    Completed in 1996

  • Undergraduate School
    U Mundial

Languages Spoken

  • English
  • Spanish

Memberships &
Professional Affiliations

Dr. DeCosimo does not have any memberships or affiliations listed. If you are Dr. DeCosimo and would like to add memberships or affiliations, please update your free profile.


  • Obstetrics & Gynecology
  • Adolescent Gynecology
  • Gynecologic Surgery
  • Gynecology

Procedures Performed

  • Abdominal Hysterectomy
  • Advanced Laparoscopic Surgery
  • Bioidentical Hormone Replacement Therapy
  • Birth Control
  • Bladder Surgery
  • Botox® Injection
  • Breast Exam
  • Condyloma Fulguration
  • Contraceptive Counseling
  • Cosmetic Procedure
  • Cryosurgery
  • Depo-Provera® Birth Control Shot
  • Dermal Filler
  • Destruction or Excision of Lesion of Cervix (incl. LEEP)
  • Dilation and Curettage
  • Dysport Injection
  • Endometrial Ablation
  • Essure® Procedure
  • Fallopian Tube Reanastomosis
  • Fallopian Tube Recanalization
  • Fibroid Tumor Surgery
  • Gynecologic Cancer Screening
  • Gynecologic Laser Surgery
  • Gynecologic Surgical Procedure
  • Gynecological Examination
  • Hormone Replacement Therapy
  • Hysterectomy
  • Hysterectomy - Laparoscopic
  • Hysterectomy - Open
  • Hysteroscopic Resection of Fibroids and Polyps
  • Hysteroscopy
  • Hysteroscopy Sterilization
  • Implantable Birth Control
  • Incontinence Sling Procedure
  • Infertility Treatment
  • Intrauterine Device (IUD) Placement
  • Juvéderm® Injection
  • Laparoscopic Myomectomy
  • Laparoscopic Salpingectomy
  • Laparoscopic Surgical Procedure
  • Laparoscopic Tubal Ligation
  • Laser Hair Removal
  • Laser Skin Rejuvenation
  • Lupron Injection
  • Menopause Evaluation and Treatment
  • Minimally Invasive Gynecologic Surgery
  • Neck Surgery
  • NovaSure® Ablation
  • Oophorectomy
  • Operative Hysteroscopy
  • Osteoporosis Screening
  • Ovulation Induction
  • Pap Smear
  • Pelvic Exams
  • Permanent Birth Control
  • Prenatal Care and Counseling
  • Rectovaginal Repair
  • Removal of Reproductive Organs (Hysterectomy, Oophorectomy, Salpingectomy, Salpingo-Oophorectomy, Resection of Peritoneal Malignancy)
  • Rh Incompatibility Screening
  • Routine Gynecological Care
  • STD Screening
  • Supracervical Hysterectomy
  • Thermachoice® Ablation
  • Treatment of Fibroid Tumors
  • Tubal Ligation Reversal
  • Urinary Incontinence Surgery
  • Uterine Prolapse Surgery
  • Vaginal Hysterectomy
  • Vaginal Reconstructive Surgery