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Edit this profileAt a glance
- 2490 Hospital Dr Ste 111, Mountain View, CA 94040
About Dr. Hsieh
Based in Mountain View, CA, Gillian L. Hsieh, MD is listed in the NPI registry under obstetrics & gynecology. Gillian graduated from Baylor College of Medicine in 2011. According to Medicare claims data, Gillian cared for 398 Medicare patients across 447 services. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more, and new patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more. NPI 1063765576 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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
- (650) 934-7520
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
2490 HOSPITAL DR STE 111
Mountain View, CA 94040
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
Contraception
Fertility
High-risk or subspecialty
Infections
Pelvic pain and benign gynecology
- Uterine fibroids
- Chronic pelvic pain
- Ovarian cysts
- Painful intercourse
- Pelvic organ prolapse
- Urinary incontinence in women
Most searched conditions
Infections and vulvovaginal conditions
Menstrual and hormonal
- Absent periods
- Genitourinary syndrome of menopause
- Painful periods
- Perimenopause
- Premenstrual syndrome
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
Pregnancy Complications
Vaginal & Vulvar Health
Procedures & services
Diagnostic Tests
Hormone & Menopause
Laparoscopic and adnexal surgery
Pelvic floor
Pregnancy and delivery
Preventive and diagnostic
- Pelvic examination
- Transvaginal ultrasound
- Well-woman examination
- Colposcopy
- Endometrial biopsy
- Human papillomavirus testing
Subspecialty procedures
Surgeries
Most searched procedures
Contraception and office treatment
Birth Control
Contraception
Diagnostic Procedures
Fertility
- Egg freezing
- Intrauterine Insemination (IUI)
Postpartum Care
Pregnancy & Prenatal
Preventive Care
Preventive Screening
Routine Exams
Uterine and cervical procedures
Procedures Most Often Billed to Medicare
447 services · 398 patients · 9 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Imaging of lymph nodes during surgery | Procedure | 38900 |
38 | More than most peers in OB-GYN |
| Biopsy and removal of lymph nodes of abdominal cavity using an endoscope | Procedure | 38570 |
31 | Too few peers to compare |
| Removal of uterus, tubes, and/or ovaries through abdomen using an endoscope, 250.0 g or less | Procedure | 58571 |
30 | More than most peers in OB-GYN |
| Removal of uterus for removal of growth using an endoscope | Procedure | 58575 |
12 | Too few peers to compare |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
104 | More often than most peers in OB-GYN |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
96 | More often than most peers in OB-GYN |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
70 | More often than most peers in OB-GYN |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
54 | More often than most peers in OB-GYN |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
12 | Less 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.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 27 related providers in 4 groups
Other OB-GYNs in Mountain View 8
Same specialty, same city.
Trained at Baylor College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2011 at Baylor College of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Imaging of lymph nodes during surgery 3
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Hsieh specialize in?
Dr. Hsieh is an OB-GYN in Mountain View, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Obstetrics & Gynecology”.
NPI registry
Where is Dr. Hsieh located?
Dr. Hsieh is listed at 2490 Hospital Dr Ste 111, Mountain View, CA 94040. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Hsieh's phone number?
The number on file is (650) 934-7520. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Hsieh's NPI number?
Dr. Hsieh's National Provider Identifier is 1063765576. 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 Dr. Hsieh go to medical school?
Dr. Hsieh attended Baylor College of Medicine, graduating in 2011. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Hsieh been practicing?
Dr. Hsieh has 15 years experience. Calculated from a graduation year of 2011, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Hsieh do most often?
According to Medicare billing data, Dr. Hsieh performs procedures including imaging of lymph nodes during surgery, biopsy and removal of lymph nodes of abdominal cavity using an endoscope and removal of uterus, tubes, and/or ovaries through abdomen using an endoscope, 250.0 g or less, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Hsieh confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Hsieh. If this is you, claiming it is free.
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