DN
38 Years of Experience
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Nishiguchi, Obstetrician in Valencia, CA?
Dr. Don Nishiguchi, MD is an Obstetrician, who primarily practices in Valencia, CA with 2 additional practice locations. He has been practicing for over 38 years and is board certified. Dr. Nishiguchi graduated from Ohio State University / College of Medicine and completed his residency at USC/LAC-Keck School of Medicine. Dr. Nishiguchi is fluent in English and Spanish, and is currently seeing new patients. Dr. Nishiguchi’s practice accepts Kaiser Permanente, Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Nishiguchi’s office at (661) 259-1781.
Where did Dr. Nishiguchi go to medical school and complete their residency?
Residency: USC/LAC-Keck School of Medicine
Medical School: Ohio State University College of Medicine And Public Health,Columbus, Ohio, United States | Ohio State University / College of Medicine
Is Dr. Nishiguchi board certified as an Obstetrician?
Yes, Dr. Don Nishiguchi, MD is board certified by the American Board of Obstetrics and Gynecology
What languages does Dr. Nishiguchi speak?
Dr. Nishiguchi and their clinical team can communicate with patients in the following languages:
English
Spanish
What conditions does an Obstetrician like Dr. Nishiguchi typically treat?
As an Obstetrician, Dr. Nishiguchi diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Nishiguchi. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Routine Gynecological Exam (Normal Findings)
- Women's Health Checkup
- Women's checkup, all clear
- Pelvic exam, normal results
- OB/GYN visit, no issues
ICD-10 Codes:
- Z01419: Encounter for gynecological examination (general) (routine) without abnormal findings
Also known as:
- Mammogram for Breast Cancer Screening
- Health Screening
- Mammography
- Breast Cancer Screening (PDQ®)
- Mammograms
- Breast X-ray
- Breast Cancer Check
ICD-10 Codes:
- Z1231: Encounter for screening mammogram for malignant neoplasm of breast
Also known as:
- Other Irregular Menstruation
- Irregular Periods
- Menstruation
- Unusual Periods
- Menstrual Cycle Problems
- Other Menstrual Irregularities
- Oligomenorrhea
- Abnormal Menstrual Cycle
ICD-10 Codes:
- N925: Other specified irregular menstruation
- N926: Irregular menstruation, unspecified
Also known as:
- Abnormal Uterine and Vaginal Bleeding
- Vaginal Bleeding
- Unusual Uterine Bleeding
- Abnormal Vaginal Discharge
- AUB
- Irregular Genital Bleeding
ICD-10 Codes:
- N939: Abnormal uterine and vaginal bleeding, unspecified
Also known as:
- Threatened Miscarriage
- Miscarriage
- Threatened Spontaneous Abortion
- Signs of Miscarriage
- Early Pregnancy Bleeding with Risk of Loss
ICD-10 Codes:
- O200: Threatened abortion
Also known as:
- General High-Risk Pregnancy Care
- Health Problems in Pregnancy
- Specialized Obstetric Monitoring
- Maternal-Fetal Medicine Consult
- Pregnancy Management for Complications
ICD-10 Codes:
- O0993: Supervision of high risk pregnancy, unspecified, third trimester
What procedures does an Obstetrician like Dr. Nishiguchi typically perform?
As an Obstetrician, Dr. Nishiguchi performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Nishiguchi. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Fetal Non-Stress Test
- Nonstress Test
- Nonstress Test (NST)
- Fetal Heart Rate Monitoring
- NST for Pregnancy
- Baby Heartbeat Test
CPT Codes:
- 59025: Fetal non-stress test
Does Dr. Nishiguchi accept my insurance?
Dr. Nishiguchi accepts most major insurance plans. Important: Please call our office at (661) 259-1781 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Nishiguchi accept in Valencia, CA?
Dr. Nishiguchi in Valencia, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
All Other Third Party
Blue Shield of California
Centene Corporation
City of Los Angeles
Kaiser Permanente
Keenan & Associates
Medicare
Other Health Care Provider
UnitedHealth Group
Unknown
View All Insurances
Where is Dr. Nishiguchi's office located?
Dr. Don Nishiguchi's Primary Practice
27871 Smyth Dr Ste 102
Valencia, CA 91355
(661) 259-1781
What is Dr. Nishiguchi's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Nishiguchi's National Provider Identifier (NPI) number is 1043368277.
What common questions do patients ask about Dr. Nishiguchi?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Nishiguchi
What is Dr. Don Nishiguchi's specialty?
Dr. Nishiguchi is a Obstetrician near Valencia, CA.
What does an Obstetrician do?
A physician specializing in the diagnosis, treatment, and management of patients with obstetric conditions focuses on the health and care of women during pregnancy, childbirth, and the postpartum period, addressing a wide range of issues related to maternal and fetal well-being.
Is this Dr. Don Nishiguchi affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Nishiguchi is affiliated with Henry Mayo Newhall Hospital, Providence Holy Cross Medical Center which are a Castle Connolly Top Hospitals. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
When to see an Obstetrician?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see an Obstetrician. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Don Nishiguchi accepting new patients in Valencia, CA?
Yes, Dr. Don Nishiguchi is accepting new patients at this time.
Does Dr. Don Nishiguchi offer online booking?
Please contact Dr. Nishiguchi's office at (661) 259-1781 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Don Nishiguchi?
Please contact Dr. Nishiguchi's office at (661) 259-1781 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. Don Nishiguchi have?
Dr. Don Nishiguchi is certified by the American Board of Obstetrics and Gynecology.
Other Obstetrician Near Valencia, CA

Dr. Maryam Ardalan, MD is an Obstetrician, who primarily practices in Valencia, CA with 1 additional practice location. She is board certified.
Valencia, CA
MK
Gynecologist
Dr. Mwanga Kazadi, MD is a Gynecologist, who primarily practices in Mission Hills, CA. She has been practicing for over 21 years and is board certified.
Mission Hills, CA
MB
Urogynecologist
Dr. Marlon Brooks, MD is an Urogynecologist, who primarily practices in Granada Hills, CA. He is board certified.
Granada Hills, CA