Physician Profile
Olivia H. Chang, M.D., MPH
Unclaimed ProfileAbout Dr. Chang
Olivia H. Chang, M.D., MPH practices obstetrics & gynecology in Orange, CA. Olivia is a 2013 graduate of Tulane University School of Medicine. According to Medicare claims data, Olivia cared for 787 Medicare patients across 2,931 services. The services billed most often include injection, onabotulinumtoxina, 1 unit, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and new patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (714) 880-7812
- Email not available
Practice Locations
101 THE CITY DR S
Orange, CA 92868
1959 NE Pacific St
Seattle, WA 98195
Conditions Commonly Evaluated or Treated
Within Obstetrics and Gynecology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Endometriosis
- Heavy periods
- Menopause
- PCOS
- Pregnancy
- Yeast infection
Infections and vulvovaginal conditions
- Bacterial vaginosis
- Genital herpes
- Genital warts
- Vulvodynia
Menstrual and hormonal
- Absent periods
- Genitourinary syndrome of menopause
- Painful periods
- Perimenopause
- Premenstrual syndrome
Pelvic pain and benign gynecology
- Chronic pelvic pain
- Ovarian cysts
- Painful intercourse
- Pelvic organ prolapse
- Urinary incontinence in women
- Uterine fibroids
Pregnancy
- Ectopic pregnancy
- Gestational diabetes
- Hyperemesis gravidarum
- Miscarriage
- Placenta previa
- Postpartum depression
- Preeclampsia
- Preterm labor
Cancer and precancer
- Abnormal cervical cells and cervical dysplasia
- Cervical cancer
- Endometrial cancer
- Endometrial hyperplasia
- Ovarian cancer
Contraception
- Birth Control Side Effects
Fertility
- Infertility
- Recurrent Miscarriages
Infections
- Chlamydia
- Pelvic Inflammatory Disease (PID)
Pregnancy Complications
- High-risk pregnancy
- Twins or triplets
Vaginal & Vulvar Health
- Abnormal vaginal discharge
Procedures & services
Most searched procedures
- C-section
- Hysterectomy
- IUD insertion
- Pap smear
- Ultrasound
Contraception and office treatment
- Contraceptive implant insertion and removal
- Diaphragm fitting
- Pessary fitting and management
Pregnancy and delivery
- External cephalic version
- Forceps- or vacuum-assisted delivery
- Prenatal care
- Vaginal childbirth
Preventive and diagnostic
- Colposcopy
- Endometrial biopsy
- Human papillomavirus testing
Birth Control
- IUD Removal
Contraception
- Birth control counseling
Diagnostic Procedures
- Amniocentesis
Fertility
- Egg freezing
- Intrauterine Insemination (IUI)
Hormone & Menopause
- Hormone Replacement Therapy (HRT) Consultation
Laparoscopic and adnexal surgery
- Gynecologic laparoscopy
- Ovarian cyst removal
- Ovary removal
Pelvic floor
- Pelvic organ prolapse surgery
- Sling surgery for stress incontinence
Postpartum Care
- Postpartum Checkup
Pregnancy & Prenatal
- Fetal Heart Rate Monitoring
- Prenatal genetic screening
Preventive Care
- Well-woman exam
Preventive Screening
- STI Screening Panel
Routine Exams
- Pelvic exam
Surgeries
- Endometriosis Excision Surgery
- Labia Reduction
- Tubal Ligation ("Tubes Tied")
Uterine and cervical procedures
- Cervical cone biopsy
- Dilation and curettage
- Endometrial ablation
- Hysteroscopy
- LEEP
- Myomectomy
Procedures Most Often Billed to Medicare
2,931 services · 787 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of temporary bladder tube | Procedure | 51701 |
55 | More often than most peers in OB-GYN |
| Insertion of temporary bladder tube | Procedure | 51701 |
46 | More often than most peers in OB-GYN |
| Diagnostic exam of bladder and urethra using an endoscope | Procedure | 52000 |
26 | More often than most peers in OB-GYN |
| Non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings | Procedure | 51784 |
26 | As often as other peers in OB-GYN |
| Electronic assessment of bladder emptying | Procedure | 51741 |
26 | As often as other peers in OB-GYN |
| Complex measurement of pressure of urine flow in bladder with voiding pressure studies | Procedure | 51728 |
26 | As often as other peers in OB-GYN |
| Insertion of device into abdomen with pressure and urine flow rate study | Procedure | 51797 |
25 | As often as other peers in OB-GYN |
| Exam with injections of chemical for destruction of bladder using an endoscope | Procedure | 52287 |
22 | As often as other peers in OB-GYN |
| Insertion of sacral nerve neurostimulator electrode array | Procedure | 64561 |
16 | Less often than most peers in OB-GYN |
| Diagnostic exam of bladder and urethra using an endoscope | Procedure | 52000 |
13 | More often than most peers in OB-GYN |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other OB-GYNs at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other OB-GYNs in Orange 7
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Tulane University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2013 at Tulane University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of temporary bladder tube 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Olivia H. Chang, M.D. specialize in?
Olivia H. Chang, M.D. is an OB-GYN in Orange, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Obstetrics & Gynecology”.
NPI registry
Where is Olivia H. Chang, M.D. located?
Olivia H. Chang, M.D. is listed at 101 the City Dr S, Orange, CA 92868. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Olivia H. Chang, M.D.'s phone number?
The number on file is (714) 880-7812. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Olivia H. Chang, M.D.'s NPI number?
Olivia H. Chang, M.D.'s National Provider Identifier is 1881936862. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Olivia H. Chang, M.D. train?
Olivia H. Chang, M.D. attended Tulane University School of Medicine, graduating in 2013. This comes from the CMS National Downloadable File.
CMS public data
How long has Olivia H. Chang, M.D. been practicing?
Olivia H. Chang, M.D. has 13 years experience. Calculated from a graduation year of 2013, reported in the CMS National Downloadable File.
CMS public data
What does Olivia H. Chang, M.D. do most often?
According to Medicare billing data, Olivia H. Chang, M.D. performs procedures including insertion of temporary bladder tube, diagnostic exam of bladder and urethra using an endoscope and non-needle measurement and recording of electrical activity of muscles at bladder and bowel openings; reads or performs imaging such as review by radiologist of urinary bladder and urethra images with contrast and after passing urine, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Olivia H. Chang, M.D. confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Olivia H. Chang, M.D.. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.