AK
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Kaiser, Colon & Rectal Surgeon (Proctologist) in Duarte, CA?
Dr. Andreas Kaiser, MD is a Colon & Rectal Surgeon (Proctologist), who primarily practices in Duarte, CA with 2 additional practice locations. Dr. Kaiser completed his residency at University of Zurich. He is a member of the American College of Surgeons (ACS), American Medical Association (AMA), American Pancreatic Association (APA), American Society of Colon and Rectal Surgeons (ASCRS), Association for Academic Surgery (AAS), Association of Invasive and Operative Physicians of Switzerland (Foederatio Medicorum Scrutantium,, European Society of Coloproctology (ESCP), International Society of University Colorectal Surgeons (ISUCRS), Massachusetts Medical Society (MMS), Society of American Gastrointestinal and Endoscopic Surgeons (SAGES), Society for Surgery of the Alimentary Tract (SSAT), Society of Laparoendoscopic Surgeons (SLS), Society of University Surgeons (SUS), Southern California Society of Colon and Rectal Surgeons (SCSCRS), Swiss Medical Association (Foederatio Medicorum Helveticorum-FMH), Swiss Society of Visceral Surgery (SSVC), and Swiss Surgical Society (SGC). Dr. Kaiser is fluent in English, French, German, and Italian, and is currently seeing new patients. Dr. Kaiser’s practice accepts Kaiser Permanente, Medicaid, Medicare, UnitedHealthcare, Aetna, Cigna and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Kaiser’s office at (626) 256-4673.
What are Areas of Expertise for Dr. Kaiser?
Dr. Andreas Kaiser, MD is a highly-rated, board-certified Colon & Rectal Surgeon (Proctologist) known for expertly diagnosing, treating, and managing a wide array of related conditions or procedures. Utilizing the latest medical advancements and evidence-based practices, Dr. Kaiser empowers patients to confidently navigate their health journey, specializing in Colon & Rectal Cancer & Surgery, Diverticulitis, Incontinence/Pelvic Floor Disorders, Inflammatory Bowel Disease, or comprehensive wellness support. Serving the Duarte/CA community, Dr. Kaiser is dedicated to enhancing lives through expert, patient-centered care.
Where did Dr. Kaiser go to medical school and complete their residency?
Fellowship: Harvard Medical School, Beth Israel Hospital, Surgical Research | University Hospital of Zurich, Visceral Surgery | USC Division of Colorectal Surgery Colon and Rectal Surgery
Residency: University of Zurich | University Hospital of Zurich, Surgery and Pediatric Surgery, 1995 - 1998
Medical School: Universitat Zurich, Medizinische Fakultat
What languages does Dr. Kaiser speak?
Dr. Kaiser and their clinical team can communicate with patients in the following languages:
English
French
German
Italian
What conditions does Dr. Kaiser treat?
As a Colon & Rectal Surgeon (Proctologist), Dr. Kaiser 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. Kaiser. 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:
- Colorectal Cancer
- Rectal cancer
- Colon cancer
- Bowel cancer
- Malignant neoplasm of rectum
- Malignant neoplasm of sigmoid colon
- Malignant neoplasm of colon
- Colon Cancer
- Ascending Colon Cancer
- Bowel Cancer
- Colorectal Carcinoma
- Rectal Cancer
- Descending Colon Cancer
ICD-10 Codes:
- C20: Malignant neoplasm of rectum
- C187: Malignant neoplasm of sigmoid colon
- C189: Malignant neoplasm of colon, unspecified
- C182: Malignant neoplasm of ascending colon
- C19: Malignant neoplasm of rectosigmoid junction
- C186: Malignant neoplasm of descending colon
Also known as:
- Other Post-Surgery Condition
- Postoperative State
- Recovery After Surgery
- Surgical Follow-up
ICD-10 Codes:
- Z98890: Other specified postprocedural states
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 Cancer
- Anal Cancer Treatment (PDQ®)
- Anus Cancer
- Anal Carcinoma
ICD-10 Codes:
- C210: Malignant neoplasm of anus, unspecified
Also known as:
- Cancer Follow-up Exam
- Cancer
- Post-cancer treatment checkup
- Malignancy surveillance
- Oncology follow-up
ICD-10 Codes:
- Z08: Encounter for follow-up examination after completed treatment for malignant neoplasm
Also known as:
- Colon Polyps
- Colonic Polyps
- Colorectal polyps
- Bowel polyps
- Intestinal polyps
ICD-10 Codes:
- K635: Polyp of colon
Also known as:
- Ileostomy Care
- Ostomy
- Ileostomy Management
- Small Intestine Stoma Care
- Ileostomy Follow-up
ICD-10 Codes:
- Z432: Encounter for attention to ileostomy
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 Fistula
- Anal Disorder
- Fistulas
- Perianal Fistula
- Fistula-in-Ano
- Abnormal Anal Tract
ICD-10 Codes:
- K603: Anal fistula
Also known as:
- History of rectal or anal cancer
- Colorectal Cancer
- Past rectal cancer
- Anal cancer survivor
- Previous rectosigmoid malignancy
ICD-10 Codes:
- Z85048: Personal history of other malignant neoplasm of rectum, rectosigmoid junction, and anus
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:
- History of Radiation Therapy
- Radiation Therapy
- Past Radiation Treatment
- Previous Radiotherapy
- History of Radiotherapy
ICD-10 Codes:
- Z923: Personal history of irradiation
Also known as:
- Rectal Prolapse
- Pelvic Floor Disorder
- Rectal Disorder
- Protruding Rectum
- Bowel Prolapse
- Rectal Eversion
ICD-10 Codes:
- K623: Rectal prolapse
Also known as:
- Vaginal-Intestinal Fistula
- Colonic Disease
- Fistulas
- Vaginal Disease
- Rectovaginal Fistula
- Colovaginal Fistula
- Vaginal Bowel Fistula
ICD-10 Codes:
- N823: Fistula of vagina to large intestine
What procedures does Dr. Kaiser perform?
As a Colon & Rectal Surgeon (Proctologist), Dr. Kaiser 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. Kaiser. 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:
- Diagnostic Colonoscopy with Biopsy
- Colonoscopy with Biopsy
- Colonoscopy with Polyp Removal
- Colonoscopy Through Stoma
- Colonoscopy with Tissue Removal
- Colonoscopy
- Colorectal Cancer Screening Tests
- Flexible Colonoscopy
- Colon Exam with Biopsy
- Lower Endoscopy
- Colon Cancer Screening
- Colon Biopsy
- Large Intestine Scope
- Colorectal Cancer Screening
- Flexible Colonoscopy with Polypectomy
- Colon Polyp Removal
- Colorectal Lesion Excision
- Stoma Colonoscopy
- Diagnostic Stoma Scope
- Colostomy Colonoscopy
- Flexible colonoscopy with EMR
- Endoscopic mucosal resection (colon)
- Colon polyp removal during colonoscopy
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
- 45385: Colonoscopy, flexible; with removal of tumor(s), polyp(s), or other lesion(s) by snare technique
- 44388: Colonoscopy through stoma; diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 45390: Colonoscopy, flexible; with endoscopic mucosal resection
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:
- Flexible Sigmoidoscopy with Biopsy
- Endoscopy of Small Intestinal Pouch
- Colonoscopy with Foreign Body Removal
- Colonoscopy with Injections
- Colorectal Cancer Screening Tests
- Colonoscopy
- Sigmoid Colon Scope with Biopsy
- Lower Endoscopy with Tissue Sample
- Flexible Sigmoidoscopy and Biopsy
- Rectum and Lower Colon Exam
- Small Bowel Pouch Endoscopy
- Kock Pouch Evaluation
- Ileal Reservoir Endoscopy
- Pouchoscopy
- Flexible Colonoscopy for Object Removal
- Colon Scope with Foreign Object Extraction
- Foreign Body Removal from Colon
- Colonoscopy for Foreign Object
- Flexible Colonoscopy with Injection
- Colon Scope with Medication
- Therapeutic Colonoscopy
CPT Codes:
- 45331: Sigmoidoscopy, flexible; with biopsy, single or multiple
- 44385: Endoscopic evaluation of small intestinal pouch (eg, Kock pouch, ileal reservoir [S or J]); diagnostic, including collection of specimen(s) by brushing or washing, when performed (separate procedure)
- 45379: Colonoscopy, flexible; with removal of foreign body(s)
- 45381: Colonoscopy, flexible; with directed submucosal injection(s), any substance
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:
- Endoscopy and Biopsy of Small Intestine Pouch
- Kock pouch endoscopy
- Ileal reservoir evaluation
- Small bowel pouch biopsy
CPT Codes:
- 44386: Endoscopic evaluation of small intestinal pouch (eg, Kock pouch, ileal reservoir [S or J]); with biopsy, single or multiple
Also known as:
- Seton Placement
- Fistula Seton Insertion
- Drainage Seton Placement
- Anal Fistula Treatment
CPT Codes:
- 46020: Placement of seton
Also known as:
- Anal Fistula Repair with Rectal Flap
- Rectal Advancement Flap for Fistula
- Fistula-in-Ano Repair with Flap
- Anal Fistula Surgery
CPT Codes:
- 46288: Closure of anal fistula with rectal advancement flap
Also known as:
- Anal Fistula Surgery
- Fistulectomy
- Fistulotomy
- Anal Fistula Repair
CPT Codes:
- 46280: Surgical treatment of anal fistula (fistulectomy/fistulotomy); transsphincteric, suprasphincteric, extrasphincteric or multiple, including placement of seton, when performed
Also known as:
- Upper Endoscopy with Biopsy
- Biopsy
- Endoscopy
- EGD with Biopsy
- Gastroscopy with Biopsy
- Esophagogastroduodenoscopy with Biopsy
CPT Codes:
- 43239: Esophagogastroduodenoscopy, flexible, transoral; with biopsy, single or multiple
Also known as:
- Omental Flap Surgery
- Intra-abdominal Omental Transfer
- Omentum Flap
- Abdominal Tissue Flap
CPT Codes:
- 49905: Omental flap, intra-abdominal (List separately in addition to code for primary procedure)
Also known as:
- Hemorrhoid Removal with Rubber Band Ligation
- Rubber Band Ligation for Hemorrhoids
- Internal Hemorrhoid Ligation
- Banding of Hemorrhoids
- Hemorrhoid Banding
CPT Codes:
- 46221: Hemorrhoidectomy, internal, by rubber band ligation(s)
Also known as:
- Removal of Rectal Tumor
- Transanal Rectal Tumor Excision
- Partial Thickness Rectal Tumor Removal
- Rectal Lesion Excision
CPT Codes:
- 45171: Excision of rectal tumor, transanal approach; not including muscularis propria (ie, partial thickness)
Also known as:
- Anal Seton Removal
- Seton Removal
- Anal Marker Removal
- Fistula Seton Removal
CPT Codes:
- 46030: Removal of anal seton, other marker
Also known as:
- Rectal Stricture Dilation (Under General Anesthesia)
- Anesthesia
- Rectal narrowing dilation
- Anorectal stricture treatment
- Rectal stretching procedure
- Dilation of anal canal stricture
CPT Codes:
- 45910: Dilation of rectal stricture (separate procedure) under anesthesia other than local
Also known as:
- Colposcopy (Vagina and Cervix)
- Colposcopy
- Vaginal colposcopy
- Cervical colposcopy
- Examination of vagina and cervix
CPT Codes:
- 57420: Colposcopy of the entire vagina, with cervix if present;
Does Dr. Kaiser accept my insurance?
Dr. Kaiser accepts most major insurance plans. Important: Please call our office at (626) 256-4673 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Kaiser accept in Duarte, CA?
Dr. Kaiser in Duarte, 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
CalOptima
Centene
Crown Cork and Seal Company
CVS Health (formerly Aetna)
Elevance Health Inc. (formerly Anthem)
HealthComp
Medicare
Other Health Care Provider
UnitedHealthcare
View All Insurances
Where is Dr. Kaiser's office located?
Recognitions
Memberships & Associations
American College of Surgeons (ACS)
Member
American Medical Association (AMA)
Member
American Pancreatic Association (APA)
Member
American Society of Colon and Rectal Surgeons (ASCRS)
Member
Association for Academic Surgery (AAS)
Member
Association of Invasive and Operative Physicians of Switzerland (Foederatio Medicorum Scrutantium,
Member
European Society of Coloproctology (ESCP)
Member
International Society of University Colorectal Surgeons (ISUCRS)
Member
Massachusetts Medical Society (MMS)
Member
Society of American Gastrointestinal and Endoscopic Surgeons (SAGES)
Member
Society for Surgery of the Alimentary Tract (SSAT)
Member
Society of Laparoendoscopic Surgeons (SLS)
Member
Society of University Surgeons (SUS)
Member
Southern California Society of Colon and Rectal Surgeons (SCSCRS)
Member
Swiss Medical Association (Foederatio Medicorum Helveticorum-FMH)
Member
Swiss Society of Visceral Surgery (SSVC)
Member
Swiss Surgical Society (SGC)
Member
What is Dr. Kaiser's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Kaiser's National Provider Identifier (NPI) number is 1720092679.
What common questions do patients ask about Dr. Kaiser?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Kaiser
What is Dr. Andreas Kaiser's specialty?
Dr. Kaiser is a Colon & Rectal Surgeon (Proctologist) near Duarte, CA. A colon and rectal surgeon possesses the expertise to diagnose and treat a variety of ailments affecting the intestinal tract, including the colon, rectum, anal canal, and perianal area, through both medical and surgical interventions. Furthermore, this professional also engages with other organs and tissues, including the liver, urinary system, and female reproductive system, that are relevant to primary intestinal disorders. Contact Dr. Kaiser to book an appointment today.
Is this Dr. Andreas Kaiser affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Kaiser is affiliated with City of Hope - Duarte Cancer Center which is a Castle Connolly Top Hospital. 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 Colon & Rectal Surgeon (Proctologist)?
Explore Colon & Rectal Surgeon (Proctologist) 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 Andreas Kaiser accepting new patients in Duarte, CA?
Yes, Dr. Andreas Kaiser is accepting new patients at this time.
Does Dr. Andreas Kaiser offer online booking?
Please contact Dr. Kaiser's office at (626) 256-4673 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Andreas Kaiser?
Please contact Dr. Kaiser's office at (626) 256-4673 for information regarding telehealth appointment availability or for scheduling assistance.
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