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Edit this profileAt a glance
- 1147 Red Tail Way, Simi Valley, CA 93065
About Dr. Tan
Irene S. Tan, M.D. practices obstetrics & gynecology in Simi Valley, CA. Medicare claims data shows Irene provided 330 services to 317 patients. The services billed most often include cervical or vaginal cancer screening; pelvic and clinical breast examination, annual depression screening, 5 to 15 minutes, and screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory. The provider's National Provider Identifier (NPI) is 1699942425.
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
- (805) 527-8055
- Email not available
Practice Locations
1147 RED TAIL WAY
Simi Valley, CA 93065
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
- Amniocentesis
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
330 services · 317 patients · 7 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Cervical or vaginal cancer screening; pelvic and clinical breast examination | Billing code | G0101 |
84 | More often than most peers in OB-GYN |
| Annual depression screening, 5 to 15 minutes | Billing code | G0444 |
82 | More often than most peers in OB-GYN |
| Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory | Billing code | Q0091 |
59 | 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 |
33 | As often as other peers in OB-GYN |
| Pelvic exam | Office visit | 99459 |
28 | As often as other peers in OB-GYN |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
26 | As often as other peers in OB-GYN |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
18 | 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 6
Same specialty, same street address — most likely the same department or group.
Also at this address 2
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 Simi Valley 3
Same specialty, same city.
More connections — 16 related providers in 2 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2004 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Irene S. Tan's specialty?
Irene S. Tan is an OB-GYN in Simi Valley, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Obstetrics & Gynecology”.
NPI registry
Where can I find Irene S. Tan?
Irene S. Tan is listed at 1147 Red Tail Way, Simi Valley, CA 93065. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Irene S. Tan?
The number on file is (805) 527-8055. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Irene S. Tan?
Irene S. Tan's National Provider Identifier is 1699942425. 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
What is Irene S. Tan's education?
Irene S. Tan attended Other, graduating in 2004. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Irene S. Tan have?
Irene S. Tan has 22 years experience. Calculated from a graduation year of 2004, reported in the CMS National Downloadable File.
CMS public data
What is Irene S. Tan known for?
According to Medicare billing data, Irene S. Tan the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Irene S. Tan's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Irene S. Tan. If this is you, claiming it is free.
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