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. Dr. Gahagan is fluent in English, and is currently seeing new patients. Dr. Gahagan’s practice accepts Kaiser Permanente, Medicaid, Medicare 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 a Surgeon like Dr. Gahagan typically 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. Learn more about our claims-based healthcare methodology.
Also known as:
- Hemorrhoids
- Piles
- Swollen Veins in Anus
- Anal Lumps
- Anal veins
- Swollen rectal veins
ICD-10 Codes:
- K649: Unspecified hemorrhoids
- K648: Other hemorrhoids
Also known as:
- Colorectal Cancer
- Rectal cancer
- Colon cancer
- Bowel cancer
- Malignant neoplasm of rectum
ICD-10 Codes:
- C20: Malignant neoplasm of rectum
Also known as:
- Anal Fissure
- Anal Disorder
- Rectal Tear
- Fissure in Anus
- Perianal Fissure
ICD-10 Codes:
- K602: Anal fissure, unspecified
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
What procedures does a Surgeon like Dr. Gahagan typically perform?
As a Surgeon, Dr. Gahagan 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. 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. Learn more about our claims-based healthcare methodology.
Also known as:
- Anoscopy (Diagnostic)
- Anoscopy
- Anal Canal Exam
- Rectal Scope Exam
- Anus Diagnostic Procedure
CPT Codes:
- 46600: Anoscopy; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
Also known as:
- Flexible Sigmoidoscopy
- Colorectal Cancer Screening Tests
- Sigmoidoscopy
- Lower colon exam
- Flexible colon scope
- Rectum and lower colon check
CPT Codes:
- 45330: Sigmoidoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
Also known as:
- Diagnostic Colonoscopy with Biopsy
- Colonoscopy with Biopsy
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy
- Colon Exam with Biopsy
- Lower Endoscopy
- Colon Cancer Screening
- Colon Biopsy
- Large Intestine Scope
- Colorectal Cancer Screening
CPT Codes:
- 45378: Colonoscopy, flexible; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 45380: Colonoscopy, flexible; with biopsy, single or multiple
Also known as:
- Hemorrhoid Removal with Rubber Band Ligation
- Internal Hemorrhoid Removal (THD)
- Rubber Band Ligation for Hemorrhoids
- Internal Hemorrhoid Ligation
- Banding of Hemorrhoids
- Hemorrhoid Banding
- Transanal Hemorrhoidal Dearterialization
- THD Procedure
- Hemorrhoid Ligation with Mucopexy
CPT Codes:
- 46221: Hemorrhoidectomy, internal, by rubber band ligation(s)
- 46948: Hemorrhoidectomy, internal, by transanal hemorrhoidal dearterialization, 2 or more hemorrhoid columns/groups, including ultrasound guidance, with mucopexy, when performed
Also known as:
- Anal Sphincter Nerve Block
- Internal Anal Sphincter Chemodenervation
- Anal Sphincter Injection
- Botox for Anal Fissure
- Chemical Denervation of Anal Muscle
CPT Codes:
- 46505: Chemodenervation of internal anal sphincter
Also known as:
- Hemorrhoid Removal Surgery
- Hemorrhoidectomy
- Piles Surgery
- Internal and External Hemorrhoid Excision
CPT Codes:
- 46255: Hemorrhoidectomy, internal and external, single column/group;
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
Blue Shield of California
Centene Corporation
Cigna Group
Community Health Network of Washington
CVS Health (formerly Aetna)
Medicare
Other Health Care Provider
Santa Cruz County
State of California
UnitedHealth Group
View All Insurances
Where is Dr. Gahagan's office located?
Dr. John Gahagan's Primary Practice
5725 W Las Positas Blvd Ste 200
Pleasanton, CA 94588
(650) 736-1270
What hospitals are Dr. Gahagan affiliated with?
Castle Connolly Top Hospital
This doctor is affiliated with a Castle Connolly Top Hospital.
Dr. Gahagan has admitting privileges at the following hospitals:
Stanford Health Care - Valleycare,Pleasanton, CA
Ranked in 2 Procedures
Stanford Health Care - Valleycare,Pleasanton, CA
Ranked in 2 Procedures
Stanford Health Care - Stanford Hospital,Stanford, CARanked in 6 Procedures
Stanford Health Care - Stanford Hospital,Stanford, CA
Ranked in 6 Procedures
Alta Bates Summit Medical Center - Summit Campus,Oakland, CA
Ranked in 2 Specialties
Ranked in 4 Procedures
Alta Bates Summit Medical Center - Summit Campus,Oakland, CA
Ranked in 2 Specialties
Ranked in 4 Procedures
Mills-Peninsula Medical Center,Burlingame, CARanked in 3 Specialties
Ranked in 6 Procedures
Mills-Peninsula Medical Center,Burlingame, CA
Ranked in 3 Specialties
Ranked in 6 Procedures
Memorial Hospital Los Banos,Los Banos, CARanked ObGyn Surgery
Ranked C-section surgery
Memorial Hospital Los Banos,Los Banos, CA
Ranked ObGyn Surgery
Ranked C-section surgery
Sutter Tracy Community Hospital,Tracy, CARanked Mastectomy
Sutter Tracy Community Hospital,Tracy, CA
Ranked Mastectomy
What is Dr. Gahagan's NPI number?A 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.
What does a Surgeon do?
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.
Is Dr. John Gahagan affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Gahagan is affiliated with Stanford Health Care - Valleycare, Stanford Health Care - Stanford Hospital, Alta Bates Summit Medical Center - Summit Campus, Mills-Peninsula Medical Center, Memorial Hospital Los Banos, Sutter Tracy Community Hospital 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 a Surgeon?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see a Surgeon. 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 Dr. 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 Dr. John Gahagan?
Please contact Dr. Gahagan's office at (650) 736-1270 to schedule an appointment.
Where is Dr. Gahagan's office located?
Dr. Gahagan's offices are located in Pleasanton, CA, Hayward, CA, and Stanford, CA.
Other Surgeon Near Pleasanton, CA
DL
Surgeon
Accepting patientsDr. Dana Lin, MD is a Surgeon, who primarily practices in Pleasanton, CA with 2 additional practice locations.
Pleasanton, CA
Surgeon
Accepting patientsDr. Yen-Chung Lee, MD is a Surgeon, who primarily practices in Pleasanton, CA with 2 additional practice locations. He has been practicing for over 21 years.
Pleasanton, CA
VM
Surgeon
Accepting patientsDr. Vanni Manthiram, MD is a Surgeon, who primarily practices in Pleasanton, CA with 2 additional practice locations.
Pleasanton, CA