AN
31 Years of Experience
Accepting patients
Who is Dr. Nan, Obstetrician / Gynecologist (OBGYN) in Antioch, CA?
Dr. Allen Nan, MD is an Obstetrician / Gynecologist (OBGYN), who primarily practices in Antioch, CA with 1 additional practice location. He has been practicing for over 31 years and is board certified. Dr. Nan completed his residency at St Francis Hosp Med Ctr, Obstetrics And Gynecology. Dr. Nan is fluent in English, Chinese, Portuguese, and Spanish, and is currently seeing new patients. Dr. Nan’s practice accepts Kaiser Permanente and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Nan’s office at (925) 813-6500.
Where did Dr. Nan go to medical school and complete their residency?
Residency: St Francis Hosp Med Ctr, Obstetrics And Gynecology | St Francis Hospital Med Center
Is Dr. Nan board certified as an Obstetrician / Gynecologist (OBGYN)?
Yes, Dr. Allen Nan, MD is board certified by the American Board of Obstetrics and Gynecology
What languages does Dr. Nan speak?
Dr. Nan and their clinical team can communicate with patients in the following languages:
Chinese
English
Portuguese
Spanish
What conditions does Dr. Nan treat?
As an Obstetrician / Gynecologist (OBGYN), Dr. Nan 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. Nan. 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.
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:
- Birth Control Management (Unspecified)
- Other Birth Control Counseling
- Birth Control
- General contraceptive care
- Family planning management
- Birth control services
- Additional contraceptive advice
- General family planning discussion
- Ongoing birth control counseling
ICD-10 Codes:
- Z309: Encounter for contraceptive management, unspecified
- Z3009: Encounter for other general counseling and advice on contraception
Also known as:
- Third Trimester Prenatal Care
- Second Trimester Prenatal Care
- Prenatal Care
- Late Pregnancy Check-ups
- Routine Third Trimester Care
- Maternity Care (Third Trimester)
- Mid-Pregnancy Check-ups
- Routine Second Trimester Care
- Maternity Care (Second Trimester)
- Late pregnancy care
- Third trimester check-ups
- Antenatal care in late pregnancy
ICD-10 Codes:
- Z3483: Encounter for supervision of other normal pregnancy, third trimester
- Z3482: Encounter for supervision of other normal pregnancy, second trimester
- Z3403: Encounter for supervision of normal first pregnancy, third trimester
Also known as:
- Other Vaginal Disorder
- Vaginal Disease
- Non-inflammatory Vaginal Conditions
- Specific Vaginal Problems
ICD-10 Codes:
- N898: Other specified noninflammatory disorders of vagina
Also known as:
- General High-Risk Pregnancy Care
- Pregnancy Care for Past Obstetric Problems
- Health Problems in Pregnancy
- Specialized Obstetric Monitoring
- Maternal-Fetal Medicine Consult
- Pregnancy Management for Complications
- Monitoring Pregnancy After Reproductive Issues
- Specialized Pregnancy Care for Previous Complications
- High-Risk Obstetric History Management
ICD-10 Codes:
- O0993: Supervision of high risk pregnancy, unspecified, third trimester
- O09293: Supervision of pregnancy with other poor reproductive or obstetric history, third trimester
Also known as:
- Understanding Test Results
- Test results explanation
- Medical findings review
- Diagnostic interpretation
ICD-10 Codes:
- Z712: Person consulting for explanation of examination or test findings
Also known as:
- Amenorrhea
- Heavy and Frequent Periods (Regular Cycle)
- Menstruation
- Absent Periods
- No Periods
- Lack of Menstruation
- Menorrhagia
- Polymenorrhea
- Abnormal Uterine Bleeding
ICD-10 Codes:
- N912: Amenorrhea, unspecified
- N920: Excessive and frequent menstruation with regular cycle
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:
- Breast Cancer Screening
- Health Screening
- Breast Cancer Screening (PDQ®)
- Mammogram
- Breast Exam
- Breast Cancer Check
ICD-10 Codes:
- Z1239: Encounter for other screening for malignant neoplasm of breast
Also known as:
- Painful Urination
- Urine and Urination
- Dysuria
- Burning when peeing
- Stinging during urination
ICD-10 Codes:
- R300: Dysuria
Also known as:
- Contraceptive Follow-up
- Birth Control
- Birth Control Check-up
- Contraception Monitoring
- Family Planning Surveillance
ICD-10 Codes:
- Z3040: Encounter for surveillance of contraceptives, unspecified
Also known as:
- Spotting During Pregnancy
- Health Problems in Pregnancy
- Vaginal Bleeding
- Light Vaginal Bleeding in Pregnancy
- Pregnancy Spotting
- Early Pregnancy Bleeding
ICD-10 Codes:
- O26851: Spotting complicating pregnancy, first trimester
What procedures does Dr. Nan perform?
As an Obstetrician / Gynecologist (OBGYN), Dr. Nan 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. Nan. 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.
Also known as:
- Colposcopy with Cervical Biopsy and Curettage
- Colposcopy
- Cervical Biopsy
- Endocervical Curettage
- Pap Smear Follow-up Procedure
CPT Codes:
- 57454: Colposcopy of the cervix including upper/adjacent vagina; with biopsy(s) of the cervix and endocervical curettage
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. Nan accept my insurance?
Dr. Nan accepts most major insurance plans. Important: Please call our office at (925) 813-6500 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Nan accept in Antioch, CA?
Dr. Nan in Antioch, 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
Conifer Health Solutions
Crown Cork and Seal Company
Health Plan of San Mateo
Kaiser Permanente
Mohawk Industries
OptumRx
View All Insurances
Where is Dr. Nan's office located?
What is Dr. Nan's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Nan's National Provider Identifier (NPI) number is 1750469326.
What common questions do patients ask about Dr. Nan?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Nan
What is Dr. Allen Nan's specialty?
Dr. Nan is a Obstetrician / Gynecologist (OBGYN) near Antioch, CA. An obstetrician/gynecologist has specialized knowledge, skills, and expertise in the medical and surgical management of the female reproductive system and related disorders. This physician acts as a consultant to other healthcare providers while also serving as a primary care physician for women, addressing their unique health needs throughout various stages of life. Contact Dr. Nan to book an appointment today.
Is this Dr. Allen Nan affiliated with a ranked Castle Connolly Top Hospital?
No, Nan is not affiliated with a Castle Connolly Top Hospital. Castle Connolly Top Hospitals 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
Where can I learn more about Obstetrician / Gynecologist (OBGYN)?
Explore Obstetrician / Gynecologist (OBGYN) with 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 Allen Nan accepting new patients in Antioch, CA?
Yes, Dr. Allen Nan is accepting new patients at this time.
Does Dr. Allen Nan offer online booking?
Please contact Dr. Nan's office at (925) 813-6500 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Allen Nan?
Please contact Dr. Nan's office at (925) 813-6500 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. Allen Nan have?
Dr. Allen Nan is certified by the American Board of Obstetrics and Gynecology.
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