JG
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Gahagan, Surgeon in Pleasanton, CA?
Dr. John Gahagan, MD is a Surgeon, who primarily practices in Pleasanton, CA with 2 additional practice locations. He is board certified. Dr. Gahagan is fluent in English, and is currently seeing new patients. Dr. Gahagan’s practice accepts Kaiser Permanente, Medicaid, Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Gahagan’s office at (650) 736-1270.
What languages does Dr. Gahagan speak?
Dr. Gahagan and their clinical team can communicate with patients in the following languages:
English
What conditions does Dr. Gahagan treat?
As a Surgeon, Dr. Gahagan 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. Gahagan. 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:
- Hemorrhoids
- Hemorrhoidal Skin Tags
- Piles
- Swollen Veins in Anus
- Anal Lumps
- Anal veins
- Swollen rectal veins
- Anal skin tags
- Perianal skin tags
- Leftover hemorrhoid skin
ICD-10 Codes:
- K649: Unspecified hemorrhoids
- K648: Other hemorrhoids
- K644: Residual hemorrhoidal skin tags
Also known as:
- Colorectal Cancer
- Rectal cancer
- Colon cancer
- Bowel cancer
- Malignant neoplasm of rectum
- Malignant neoplasm of sigmoid colon
- Colon Cancer
- Ascending Colon Cancer
- Bowel Cancer
- Colorectal Carcinoma
- Malignant neoplasm of colon
ICD-10 Codes:
- C20: Malignant neoplasm of rectum
- C187: Malignant neoplasm of sigmoid colon
- C182: Malignant neoplasm of ascending colon
- C189: Malignant neoplasm of colon, unspecified
Also known as:
- Anal Fissure
- Anal Disorder
- Rectal Tear
- Fissure in Anus
- Perianal Fissure
ICD-10 Codes:
- K602: Anal fissure, unspecified
Also known as:
- Rectal Bleeding
- Dark, Tarry Stools (Melena)
- Gastrointestinal Bleeding
- Gastrointestinal (GI) Bleeding
- Anal Bleeding
- Blood in Stool
- Lower GI Bleed
- Melena
- Black Stools
- Upper GI Bleed Signs
ICD-10 Codes:
- K625: Hemorrhage of anus and rectum
- K921: Melena
Also known as:
- Other Anal and Rectal Condition
- Anal Disorder
- Rectal Disorder
- Proctitis
- Anal Disorders
- Rectal Disorders
ICD-10 Codes:
- K6289: Other specified diseases of anus and rectum
Also known as:
- Anal Fistula
- Anal Disorder
- Fistulas
- Perianal Fistula
- Fistula-in-Ano
- Abnormal Anal Tract
ICD-10 Codes:
- K603: Anal fistula
Also known as:
- Intestinal Obstruction
- Bowel Obstruction
- Blocked Intestines
- Gut Blockage
ICD-10 Codes:
- K56609: Unspecified intestinal obstruction, unspecified as to partial versus complete obstruction
Also known as:
- Anal Fistula
- Perianal Fistula
- Fistula in Anus
- Rectal Fistula
ICD-10 Codes:
- K6030: Anal fistula, unspecified
Also known as:
- Colon Cancer Screening
- Health Screening
- Colorectal Cancer Screening (PDQ®)
- Screening Tests to Detect Colorectal Cancer and Polyps
- Tests to Detect Colorectal Cancer and Polyps
- Colorectal Cancer Screening
- Colonoscopy Screening
- Bowel Cancer Screening
ICD-10 Codes:
- Z1211: Encounter for screening for malignant neoplasm of colon
Also known as:
- Other Pre-Procedure Examination
- Various pre-op checks
- Miscellaneous pre-surgery exams
- Other pre-treatment assessments
ICD-10 Codes:
- Z01818: Encounter for other preprocedural examination
Also known as:
- Anal Cancer
- Anal Cancer Treatment (PDQ®)
- Anus Cancer
- Anal Carcinoma
ICD-10 Codes:
- C210: Malignant neoplasm of anus, unspecified
Also known as:
- Other Intestinal Condition
- Colonic Disease
- Small Intestine Disorder
- Bowel Conditions
- Gut Problems
- Digestive Issues
ICD-10 Codes:
- K6389: Other specified diseases of intestine
Also known as:
- Large Intestine Diverticulitis
- Diverticulosis and Diverticulitis
- Inflamed Colon Diverticula
- Colon Diverticular Inflammation
ICD-10 Codes:
- K5732: Diverticulitis of large intestine without perforation or abscess without bleeding
Also known as:
- Primary Hyperparathyroidism
- Parathyroid Disorder
- Familial isolated hyperparathyroidism
- Overactive Parathyroid Gland
- High Parathyroid Hormone
- PTH Overproduction
ICD-10 Codes:
- E210: Primary hyperparathyroidism
Which procedures does Dr. Gahagan perform as a Surgeon?
As a Surgeon, procedures performed by a Dr. John Gahagan may include:
- Abdominal Wall Reconstruction
- Amputation
- Appendicitis / Appendectomy
- Brain Aneurysm Treatment
- Brain Surgery
- Brain Tumor Evaluation
- Central Line Placement
- Cerebral Shunt
For detailed information, please contact Dr. Gahagan's office.
Does Dr. Gahagan accept my insurance?
Dr. Gahagan accepts most major insurance plans. Important: Please call our office at (650) 736-1270 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Gahagan accept in Pleasanton, CA?
Dr. Gahagan in Pleasanton, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Alameda Alliance
All Other Third Party
Blue Shield of California
Central California Alliance for Health
Community Health Network
CVS Health (formerly Aetna)
Express Scripts
Medicaid
Medicare
UnitedHealthcare
View All Insurances
Where is Dr. Gahagan's office located?
Dr. John Gahagan's Primary Practice
5725 W Las Positas Blvd
Pleasanton, CA 94588
(650) 736-1270
What is Dr. Gahagan's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Gahagan's National Provider Identifier (NPI) number is 1558629493.
What common questions do patients ask about Dr. Gahagan?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Gahagan
What is Dr. John Gahagan's specialty?
Dr. Gahagan is a Surgeon near Pleasanton, CA. General surgeons are experts in diagnosing and managing surgical conditions which includes preoperative, operative, and postoperative care, as well as addressing complications. Their expertise include the areas such as the alimentary tract, breast, abdomen, skin and soft tissue, endocrine system, head and neck, pediatric surgery, surgical critical care, surgical oncology, trauma, burns, and vascular surgery. General surgeons increasingly utilize minimally invasive and endoscopic techniques to provide proper care. In addition to this, many general surgeons have expertise in transplantation, plastic, and cardiothoracic surgery. Contact Dr. Gahagan to book an appointment today.
Is this Dr. John Gahagan affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Gahagan is affiliated with Stanford Health Care - Stanford Hospital, Alta Bates Summit Medical Center - Alta Bates Campus 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
Where can I learn more about Surgeon?
Explore Surgeon 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 John Gahagan accepting new patients in Pleasanton, CA?
Yes, Dr. John Gahagan is accepting new patients at this time.
Does Dr. John Gahagan offer online booking?
Please contact Dr. Gahagan's office at (650) 736-1270 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with John Gahagan?
Please contact Dr. Gahagan's office at (650) 736-1270 for information regarding telehealth appointment availability or for scheduling assistance.
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