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Home > CA Providers > Obstetricians & Gynecologists: OB-GYNs

Dr. Dennis J. Buchanan, MD

Accepting New Patients

(239 Ratings)

Specializes in: Obstetrics & Gynecology

University of Southern California (USC), Keck School of Medicine

Professional interests include: vaginal birth after cesarean (VBAC), cesarean section (C-section), postpartum thyroiditis, and more.

101 Laguna Road Suite 100
Fullerton, CA 92835

(714) 992-5350

Dr. Dennis J. Buchanan, MD is an obstetrician and gynecologist in Fullerton, CA specializing in obstetrics & gynecology. He graduated from University of Southern California (USC), Keck School of Medicine. Dr. Dennis J. Buchanan, MD is affiliated with St. Joseph Health, Providence, Providence Medical Foundation, Providence St. Jude Medical Center, St. Jude Medical Center (Fullerton) and St. Jude Heritage Medical Group.

Office Locations

St. Jude Heritage Medical Group

101 Laguna Road Suite 100
Fullerton, CA 92835

(714) 992-5350

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Some issues Dr. Dennis J. Buchanan, MD can help you with:

Cesarean Section (C-Section)

A Cesarean section (more often known as "C-Section") is a surgery performed during labor and delivery. A C-Section is a procedure that delivers a baby through an incision in the lower abdomen and uterus. In the United States, about a third of all births are performed by Cesarean section. Most often, a C-section is done by an obstetrician/gynecologist (OB-GYN), or in certain regions, a general surgeon or family physician.

C-section incisions can be up-and-down (vertical), from belly button to lower abdomen or side-to-side (horizontal), across the lower abdomen. Side-to-side incisions are more frequently used. After the exterior incisions are made, the doctor then cuts into the uterus and amniotic sac and delivers the infant and cuts the baby's umbilical cord. The mother receives medicine to expel the placenta and the doctor helps to safely remove it. Finally, the doctor uses sutures to seal the uterus and tissue incisions. The initial C-section skin incision is also closed with sutures or staples.

C-sections are typically performed with regional anesthesia, which inhibits pain in the lower half of the body, but allows mothers to be awake. However, some mothers may receive general anesthesia, where they are put to sleep during the surgical procedure.

C-sections may be planned or unplanned, depending on the circumstances of the birth.

Pre-existing conditions like heart disease, high blood pressure, herpes, and HIV may prompt a doctor to prescribe a C-section. Other situations for C-section include:

A large baby or birth to multiple children
Pelvic fracture or limited birth canal
Baby in the "breech position," where a baby is positioned feet or bottom first in the uterus
Baby with a developmental disorder
Irregular fetal heartbeat
Mother with a history of previous C-sections

Other mothers may require a C-section due to complications arising during delivery. These unplanned, emergency C-sections allow for a healthy birth even when complex complications are present. Problems during labor which may necessitate a C-section include:

Labor not progressing
Fetus switching position during labor
Distressed infant
Blockage of the cervical opening by the placenta
Prolapsed umbilical cord

Mothers should expect about a six-week recovery period following a C-section, including an initial hospital stay of two to three days. While in the hospital, mothers may spend time with their baby and begin breastfeeding. After returning home, mothers should limit strenuous activities such as lifting, reaching, and exercise, and should make sure to get plenty of rest.

Cryotherapy

Cryotherapy is the targeted use of extreme cold to destroy unhealthy or unwanted tissue. The doctor applies the cold on the skin or injects it through a needle to reach the inside of the body, where it freezes away the problem tissue. Cryotherapy is often used to remove minor skin problems such as warts or skin tags, and it is also used to treat some small tumors.

To achieve the cold temperatures needed for cryotherapy, liquid nitrogen or argon gas is passed through a tube, which becomes cold enough to freeze cells on contact. Alternatively, liquid nitrogen can be swabbed directly onto the skin or via a spray, which applies only a specific, small amount to the skin at a time.

Because the area treated is typically very small, cryotherapy is not usually painful. There may be a sensation of cold and possibly some slight discomfort. Cryotherapy is very fast and can easily be performed in a doctor's office. It also doesn't require stitches, because there is no cutting involved. These benefits make cryotherapy a good choice for many issues, including:

Common warts
Genital warts
Skin tags
Age spots
Some skin cancers
Cervical cancer
Prostate cancer
Retinoblastoma, cancer that occurs in the eye

Depending on the procedure, it usually takes three to four weeks to heal after cryotherapy. If it was done internally, patients may feel sore or have a small amount of swelling the first day afterwards. If cryotherapy was performed on the skin, patients will have a scab where their tissue was removed. Keep it clean and dry so it can heal.

Hysteroscopy

A hysteroscopy is a diagnostic procedure performed to examine the inside of the uterus. A thin tube with a camera and light at the end, called a hysteroscope, is inserted through the vagina. It allows the physician to view the cervix and uterine walls. Sometimes, gas or liquid is used to expand the uterus and allow a better view. If necessary, tiny instruments can also be passed through the tube and used for certain procedures, such as taking a biopsy or removing a polyp.

Hysteroscopy is often done to figure out the cause of abnormal menstrual bleeding. However, it can also be used to:

Identify the cause of recurrent miscarriage
Remove polyps or fibroids, non-cancerous growths in the uterus
Remove adhesions, scar tissue within the uterus
Identify uterine septums, a wall of tissue dividing the uterus
Perform ablation, the removal of excess uterine lining

If surgery is necessary, hysteroscopy is often used along with laparoscopy, a kind of surgery performed through small incisions in the abdomen. Tiny tools are passed through the incisions, and the hysteroscope guides the doctors while surgery is performed.

In The News

“Dr. Dennis Buchanan, chairman of the Orange County Medical Assn.'s Perinatal Committee, called the new program "a step in the right direction," because obstetricians who are already counseling...”—"New Program to Aid Expectant Mothers", Los Angeles Times, August 2024

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. Dennis J. Buchanan, MD treated as an obstetrician and gynecologist in Fullerton, CA during 2012 were X-rays, breast procedures, preventive care and women's imaging.

Volume of procedures performed by Dr. Dennis J. Buchanan, MD for Medicare patients.

breast exam	45
breast procedures	53
doctor visit	31
gynecologic procedures	45
musculoskeletal imaging	11
preventive care	53
women's imaging	53
X-rays	64

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Dennis J. Buchanan, MD treated as an obstetrician and gynecologist in Fullerton, CA during 2013 were breast procedures, X-rays, preventive care and women's imaging.

Volume of procedures performed by Dr. Dennis J. Buchanan, MD for Medicare patients.

breast exam	29
breast procedures	43
doctor visit	49
gynecologic procedures	29
preventive care	43
women's imaging	43
X-rays	43

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis J. Buchanan, MD.

**Gender**
Male	0
Female	102

**Age**
From 65 to 74	55
From 75 to 84	32
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Dennis J. Buchanan, MD in 2013

Hypertension	51
High Cholesterol	47
Stroke	0
Ischemic Heart Disease	15
Depression	18
Chronic Kidney Disease	12
Asthma	0
Osteoperosis	0
Atrial Fibrilation	12
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	20
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Dennis J. Buchanan, MD treated as an obstetrician and gynecologist in Fullerton, CA during 2014 were breast exam, gynecologic procedures, breast procedures and X-rays.

Volume of procedures performed by Dr. Dennis J. Buchanan, MD for Medicare patients.

breast exam	65
breast procedures	42
doctor visit	49
gynecologic procedures	65
preventive care	42
women's imaging	42
X-rays	42

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis J. Buchanan, MD.

**Gender**
Male	0
Female	124

**Ethnicity**
Non-Hispanic White	112
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	63
From 75 to 84	39
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Dennis J. Buchanan, MD in 2014

Hypertension	58
High Cholesterol	54
Stroke	0
Ischemic Heart Disease	13
Depression	18
Chronic Kidney Disease	19
Asthma	11
Osteoperosis	15
Atrial Fibrilation	10
Heart Failure	9
Chronic Obstructive Pulmonary Disease	0
Diabetes	18
Dementia	0
Cancer	13

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Dennis J. Buchanan, MD treated as an obstetrician and gynecologist in Fullerton, CA during 2015 were breast exam, gynecologic procedures, breast procedures and X-rays.

Volume of procedures performed by Dr. Dennis J. Buchanan, MD for Medicare patients.

breast exam	66
breast procedures	57
doctor visit	18
gynecologic procedures	66
preventive care	57
women's imaging	57
X-rays	57

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis J. Buchanan, MD.

**Gender**
Male	0
Female	248

**Ethnicity**
Non-Hispanic White	210
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	136
From 75 to 84	74
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Dennis J. Buchanan, MD in 2015

Hypertension	52
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	16
Depression	15
Chronic Kidney Disease	13
Asthma	10
Osteoperosis	11
Atrial Fibrilation	9
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	18
Dementia	0
Cancer	13

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Dennis J. Buchanan, MD treated as an obstetrician and gynecologist in Fullerton, CA during 2016 were breast exam, gynecologic procedures, breast procedures and X-rays.

Volume of procedures performed by Dr. Dennis J. Buchanan, MD for Medicare patients.

breast exam	52
breast procedures	13
doctor visit	45
gynecologic procedures	52
preventive care	13
women's imaging	13
X-rays	13

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis J. Buchanan, MD.

**Gender**
Male	0
Female	97

**Ethnicity**
Non-Hispanic White	82
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	52
From 75 to 84	27
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Dennis J. Buchanan, MD in 2016

Hypertension	44
High Cholesterol	49
Stroke	0
Ischemic Heart Disease	0
Depression	21
Chronic Kidney Disease	15
Asthma	15
Osteoperosis	16
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	13
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Dennis J. Buchanan, MD treated as an obstetrician and gynecologist in Fullerton, CA during 2017 were breast exam and gynecologic procedures.

Volume of procedures performed by Dr. Dennis J. Buchanan, MD for Medicare patients.

breast exam	72
doctor visit	36
gynecologic procedures	72

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis J. Buchanan, MD.

**Gender**
Male	0
Female	109

**Ethnicity**
Non-Hispanic White	87
Black	0
Hispanic	11
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	61
From 75 to 84	31
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Dennis J. Buchanan, MD in 2017

Hypertension	50
High Cholesterol	50
Stroke	0
Ischemic Heart Disease	18
Depression	19
Chronic Kidney Disease	21
Asthma	12
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	17
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Dennis J. Buchanan, MD treated as an obstetrician and gynecologist in Fullerton, CA during 2018 were breast exam and gynecologic procedures.

Volume of procedures performed by Dr. Dennis J. Buchanan, MD for Medicare patients.

breast exam	60
doctor visit	32
gynecologic procedures	60

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis J. Buchanan, MD.

**Gender**
Male	0
Female	102

**Ethnicity**
Non-Hispanic White	82
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	52
From 75 to 84	35
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Dennis J. Buchanan, MD in 2018

Hypertension	55
High Cholesterol	53
Stroke	0
Ischemic Heart Disease	22
Depression	19
Chronic Kidney Disease	20
Asthma	11
Osteoperosis	16
Atrial Fibrilation	16
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	15
Dementia	0
Cancer	17

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Dennis J. Buchanan, MD treated as an obstetrician and gynecologist in Fullerton, CA during 2019 were breast exam and gynecologic procedures.

Volume of procedures performed by Dr. Dennis J. Buchanan, MD for Medicare patients.

breast exam	50
doctor visit	22
gynecologic procedures	50

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis J. Buchanan, MD.

**Gender**
Male	0
Female	85

**Ethnicity**
Non-Hispanic White	71
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	48
From 75 to 84	22
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Dennis J. Buchanan, MD in 2019

Hypertension	59
High Cholesterol	60
Stroke	0
Ischemic Heart Disease	19
Depression	18
Chronic Kidney Disease	24
Asthma	0
Osteoperosis	22
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	14
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Dennis J. Buchanan, MD treated as an obstetrician and gynecologist in Fullerton, CA during 2020 were breast exam and gynecologic procedures.

Volume of procedures performed by Dr. Dennis J. Buchanan, MD for Medicare patients.

breast exam	40
doctor visit	15
gynecologic procedures	40

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis J. Buchanan, MD.

**Gender**
Male	0
Female	65

**Ethnicity**
Non-Hispanic White	54
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	35
From 75 to 84	18
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Dennis J. Buchanan, MD in 2020

Hypertension	31
High Cholesterol	48
Stroke	0
Ischemic Heart Disease	0
Depression	26
Chronic Kidney Disease	0
Asthma	0
Osteoperosis	17
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	0
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Dennis J. Buchanan, MD treated as an obstetrician and gynecologist in Fullerton, CA during 2021 were breast exam and gynecologic procedures.

Volume of procedures performed by Dr. Dennis J. Buchanan, MD for Medicare patients.

breast exam	47
doctor visit	16
gynecologic procedures	47

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis J. Buchanan, MD.

**Gender**
Male	0
Female	80

**Ethnicity**
Non-Hispanic White	61
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	50
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Dennis J. Buchanan, MD in 2021

Hypertension	40
High Cholesterol	54
Stroke	0
Ischemic Heart Disease	18
Depression	16
Chronic Kidney Disease	20
Asthma	0
Osteoperosis	15
Atrial Fibrilation	0
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	14
Dementia	0
Cancer	0

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Dennis J. Buchanan, MD treated as an obstetrician and gynecologist in Fullerton, CA during 2022 were breast exam and gynecologic procedures.

Volume of procedures performed by Dr. Dennis J. Buchanan, MD for Medicare patients.

breast exam	32
doctor visit	26
gynecologic procedures	32

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Dennis J. Buchanan, MD.

**Gender**
Male	0
Female	65

**Ethnicity**
Non-Hispanic White	45
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	38
From 75 to 84	0
85 and over	0
Less than 65	0

Conditions of Medicare patients treated by Dr. Dennis J. Buchanan, MD in 2022

Hypertension	62
High Cholesterol	72
Stroke	0
Ischemic Heart Disease	0
Depression	0
Chronic Kidney Disease	17
Asthma	0
Osteoperosis	34
Atrial Fibrilation	18
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	22
Dementia	0
Cancer	20

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Dennis J. Buchanan, MD for Medicare patients.

The highest averages for the top procedures that Dr. Dennis J. Buchanan, MD treated as an obstetrician and gynecologist in Fullerton, CA were breast exam, gynecologic procedures, X-rays and breast procedures.

breast exam	50
breast procedures	41
doctor visit	30
gynecologic procedures	50
musculoskeletal imaging	11
preventive care	41
women's imaging	41
X-rays	43

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Dennis J. Buchanan, MD.

**Gender**
Male	0
Female	97

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	73
Native American / Alaskan Native	0
Hispanic	1
Other	0

**Age**
75 to 84	25
85 and over	0
Less than 65	0
65 to 74	53

Average of Total of Conditions of Medicare patients treated by Dr. Dennis J. Buchanan, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Dennis J. Buchanan, MD treated were high cholesterol, hypertension, depression and chronic kidney disease.

Hypertension	45
High Cholesterol	49
Stroke	0
Ischemic Heart Disease	11
Depression	15
Chronic Kidney Disease	14
Asthma	5
Osteoporosis	13
Heart Failure	0
Chronic Obstructive Pulmonary Disease	0
Diabetes	13
Atrial Fibrillation	5
Dementia	0
Cancer	5

Education & Training

Dr. Dennis J. Buchanan, MD graduated from University of Southern California (USC), Keck School of Medicine. He completed residency at Los Angeles County+USC Medical Center. He is certified by the American Board of Obstetrics and Gynecology, Obstetrics and Gynecology and has a state license in California.

Medical School: University of Southern California (USC), Keck School of Medicine

Residency: Los Angeles County+USC Medical Center

Board Certification: American Board of Obstetrics and Gynecology, Obstetrics and Gynecology

Licensed In: California

Affiliations & Hospitals

Dr. Dennis J. Buchanan, MD is associated with these hospitals and organizations:

St. Joseph Health

Providence

Providence Medical Foundation

Providence St. Jude Medical Center

St. Jude Medical Center (Fullerton)

St. Jude Heritage Medical Group

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. Dennis J. Buchanan, MD appears to accept the following insurance providers: Aetna PPO, Aetna HMO, CIGNA PPO, CIGNA HMO, MultiPlan PPO, Blue Shield of California, Medicare Advantage, HealthSmart, Interplan PPO, TriWest, Anthem Blue Cross HMO, Anthem Blue Cross PPO, Health Net PPO, Health Net HMO, Anthem, Coventry PPO, United Healthcare PPO, United Healthcare HMO, Providence, US Family Health Plan, Aetna Medicare PPO and CoventryFirst Health PPO.

Insurance Accepted by Provider includes:

According to our sources, Dr. Dennis J. Buchanan, MD accepts the following insurance providers:

Aetna PPO

Aetna HMO

CIGNA PPO

CIGNA HMO

MultiPlan PPO

Blue Shield of California

Medicare Advantage

HealthSmart

Interplan PPO

TriWest

Anthem Blue Cross HMO

Anthem Blue Cross PPO

Health Net PPO

Health Net HMO

Anthem

Coventry PPO

United Healthcare PPO

United Healthcare HMO

Providence

US Family Health Plan

Aetna Medicare PPO

CoventryFirst Health PPO

Ratings & Reviews

Dr. Dennis J. Buchanan, MD has an exceptional overall rating with an average of 4.86 out of 5 stars based on 239 ratings. We collect ratings and reviews of Dr. Dennis J. Buchanan, MD from all over the web to help you find the right in Fullerton, CA.

4.86

Overall Rating

(239 Ratings)

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General Payments

These charts describe general payments received by Dr. Dennis J. Buchanan, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Astellas Pharma US Inc	$57 Vesicare $57
Bayer HealthCare Pharmaceuticals Inc.	$37 Mirena $37
Pfizer Inc.	$27 MYFEMBREE $16	DUAVEE $11
Merck Sharp & Dohme Corporation	$25 NON-PRODUCT $14	NEXPLANON $12
Gilead Sciences, Inc.	$13 $13

**Types of Payments**
Food and Beverage	$143
Education	$16

Biography

Dr. Dennis Buchanan specializes in obstetrics & gynecology and practices in Fullerton, CA. His areas of expertise include the following: colposcopy, cryotherapy, and cystocele (bladder prolapse). On average, patients gave Dr. Buchanan a rating of 5.0 stars (out of 5). He accepts Anthem, Blue California, and HealthSmart, in addition to other insurance carriers. He graduated from the University of Southern California (USC), Keck School of Medicine and then he performed his residency at Los Angeles County+USC Medical Center. He has received professional recognition including the following: Southern California Super Doctors; Southern California Super Doctors 2008; and Physicians of Excellence, OCMA. Dr. Buchanan is affiliated with St. Joseph Health and Providence Medical Foundation. He has an open panel in Fullerton, CA according to Doctor.com.