AL
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Lewis, Surgical Oncologist in South Pasadena, CA?
Dr. Aaron Lewis, MD is a Surgical Oncologist, who primarily practices in South Pasadena, CA with 2 additional practice locations. Dr. Lewis is fluent in English and Spanish, and is currently seeing new patients. Dr. Lewis’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. Lewis’s office at (626) 396-2900.
What languages does Dr. Lewis speak?
Dr. Lewis and their clinical team can communicate with patients in the following languages:
English
Spanish
What conditions does Dr. Lewis treat?
As a Surgical Oncologist, Dr. Lewis 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. Lewis. 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 colon
- Malignant neoplasm of sigmoid colon
- Colon Cancer
- Ascending Colon Cancer
- Bowel Cancer
- Colorectal Carcinoma
- Rectal Cancer
ICD-10 Codes:
- C20: Malignant neoplasm of rectum
- C189: Malignant neoplasm of colon, unspecified
- C187: Malignant neoplasm of sigmoid colon
- C182: Malignant neoplasm of ascending colon
- C19: Malignant neoplasm of rectosigmoid junction
Also known as:
- Pancreatic Cancer
- Cancer of the pancreas
- Malignant neoplasm of pancreas
- Pancreatic adenocarcinoma
- Pancreas Cancer
- Malignant Pancreatic Tumor
- Pancreatic Carcinoma
ICD-10 Codes:
- C250: Malignant neoplasm of head of pancreas
- C259: Malignant neoplasm of pancreas, unspecified
Also known as:
- Cancer Spread to Liver and Bile Duct
- Liver Cancer
- Childhood Liver Cancer
- Metastatic Liver Cancer
- Secondary Liver Tumor
- Liver Metastasis
- Hepatic Cancer
- Hepatocellular Carcinoma
ICD-10 Codes:
- C787: Secondary malignant neoplasm of liver and intrahepatic bile duct
- C220: Liver cell carcinoma
Also known as:
- Other Specific Pancreatic Disease
- Pancreatic Cyst
- Pancreatic Disease
- Miscellaneous Pancreas Disorders
- Named Pancreatic Conditions
- Other Defined Pancreas Problems
- Cyst on Pancreas
- Pancreatic Pseudocyst
- Fluid Sac on Pancreas
ICD-10 Codes:
- K8689: Other specified diseases of pancreas
- K862: Cyst of pancreas
Also known as:
- Other non-cancerous neuroendocrine Tumor
- Neuroendocrine Tumor
- Benign Tumor
- Cancer
- Endocrine Disease
- Other benign neuroendocrine growths
- Various non-cancerous hormone-producing tumors
- Malignant NET
- Neuroendocrine Cancer
- NET Cancer
ICD-10 Codes:
- D3A8: Other benign neuroendocrine tumors
- C7A8: Other malignant neuroendocrine tumors
Also known as:
- Stomach Cancer
- Gastric Cancer
- Malignant Neoplasm of Stomach
- Stomach Tumor
ICD-10 Codes:
- C169: Malignant neoplasm of stomach, unspecified
Also known as:
- Bile Duct Cancer
- Liver Cancer
- Cholangiocarcinoma
- Intrahepatic cholangiocarcinoma
ICD-10 Codes:
- C221: Intrahepatic bile duct carcinoma
Also known as:
- Enlarged Liver
- Liver Disease
- Hepatomegaly
- Swollen liver
- Liver enlargement
ICD-10 Codes:
- R160: Hepatomegaly, not elsewhere classified
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:
- Digestive System Growth of Unknown Type
- Digestive Disease
- Digestive tract tumor of unknown nature
- GI growth of unknown type
- Indeterminate digestive mass
ICD-10 Codes:
- D490: Neoplasm of unspecified behavior of digestive system
Also known as:
- Thyroid Cancer
- Thyroid Carcinoma
- Malignant Thyroid Nodule
- Thyroid Gland Cancer
ICD-10 Codes:
- C73: Malignant neoplasm of thyroid gland
Also known as:
- Localized Swollen Lymph Nodes
- Enlarged glands in one area
- Local lymphadenopathy
- Swollen glands
ICD-10 Codes:
- R590: Localized enlarged lymph nodes
What procedures does Dr. Lewis perform?
As a Surgical Oncologist, Dr. Lewis 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. Lewis. 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:
- Laparoscopic Gallbladder Removal
- Keyhole Gallbladder Surgery
- Cholecystectomy Laparoscopic
- Minimally Invasive Gallbladder Surgery
CPT Codes:
- 47562: Laparoscopy, surgical; cholecystectomy
Also known as:
- Laparoscopic Partial Colectomy
- Laparoscopic Colon Mobilization
- Minimally Invasive Colon Resection
- Keyhole Colectomy
- Ileocolostomy Surgery
- Splenic Flexure Mobilization
- Laparoscopic Colectomy Assist
- Colon Take-down Surgery
CPT Codes:
- 44205: Laparoscopy, surgical; colectomy, partial, with removal of terminal ileum with ileocolostomy
- 44213: Laparoscopy, surgical, mobilization (take-down) of splenic flexure performed in conjunction with partial colectomy (List separately in addition to primary procedure)
Also known as:
- Laparoscopic Biopsy
- Minimally Invasive Biopsy
- Peritoneal Biopsy
- Abdominal Biopsy via Laparoscopy
CPT Codes:
- 49321: Laparoscopy, surgical; with biopsy (single or multiple)
Also known as:
- Laparoscopic Inguinal Hernia Repair
- Keyhole Groin Hernia Surgery
- Minimally Invasive Hernia Repair
- Laparoscopic Hernioplasty
CPT Codes:
- 49650: Laparoscopy, surgical; repair initial inguinal hernia
Also known as:
- Diagnostic Laparoscopy of Abdomen
- Exploratory Laparoscopy
- Abdominal Scope
- Peritoneal Biopsy
- Omentum Biopsy
CPT Codes:
- 49320: Laparoscopy, abdomen, peritoneum, and omentum, diagnostic, with or without collection of specimen(s) by brushing or washing (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:
- Tunneled Central Venous Catheter Removal
- Central Line Explant
- Port-a-Cath Removal
- Implantable Venous Access Device Removal
- Tunneled Catheter Extraction
CPT Codes:
- 36590: Removal of tunneled central venous access device, with subcutaneous port or pump, central or peripheral insertion
Also known as:
- Deep Armpit Lymph Node Biopsy
- Biopsy
- Axillary Lymph Node Excision
- Open Axillary Node Biopsy
- Underarm Lymph Node Removal
CPT Codes:
- 38525: Biopsy or excision of lymph node(s); open, deep axillary node(s)
Also known as:
- Deep Neck Lymph Node Biopsy
- Biopsy
- Cervical Lymph Node Excision
- Open Neck Lymph Node Biopsy
- Deep Cervical Node Removal
CPT Codes:
- 38510: Biopsy or excision of lymph node(s); open, deep cervical node(s)
Also known as:
- Sentinel Lymph Node Mapping
- Lymph Node Identification
- Sentinel Node Biopsy (Mapping)
- Dye Injection for Lymph Nodes
CPT Codes:
- 38900: Intraoperative identification (eg, mapping) of sentinel lymph node(s) includes injection of non-radioactive dye, when performed (List separately in addition to code for primary procedure)
Also known as:
- Large Malignant Skin Lesion Removal
- Skin Cancer Excision
- Large Malignant Growth Removal
- Wide Excision of Skin Cancer
- Trunk/Limb Skin Cancer Surgery
CPT Codes:
- 11606: Excision, malignant lesion including margins, trunk, arms, or legs; excised diameter over 4.0 cm
Also known as:
- Malignant Skin Lesion Removal
- Skin Cancer Excision
- Malignant Mole Removal
- Tumor Removal from Skin
- Wide Excision of Skin Lesion
CPT Codes:
- 11604: Excision, malignant lesion including margins, trunk, arms, or legs; excised diameter 3.1 to 4.0 cm
Does Dr. Lewis accept my insurance?
Dr. Lewis accepts most major insurance plans. Important: Please call our office at (626) 396-2900 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Lewis accept in South Pasadena, CA?
Dr. Lewis in South Pasadena, 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
Centene
Crown Cork and Seal Company
CVS Health (formerly Aetna)
Elevance Health Inc. (formerly Anthem)
HealthComp
Heritage Health
Medicare
Other Health Care Provider
UnitedHealthcare
View All Insurances
Where is Dr. Lewis' office located?
Dr. Aaron Lewis' Primary Practice
209 Fair Oaks Ave
South Pasadena, CA 91030
(626) 396-2900
What is Dr. Lewis's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Lewis's National Provider Identifier (NPI) number is 1053542100.
What common questions do patients ask about Dr. Lewis?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Lewis
What is Dr. Aaron Lewis's specialty?
Dr. Lewis is a Surgical Oncologist near South Pasadena, CA. A surgical oncologist is a highly qualified and trained surgeon with specialized expertise in the prevention, diagnosis, treatment, and rehabilitation of cancer patients. They have received additional training in a multidisciplinary approach and dedicate a significant portion of their practice to these areas, as well as to cancer research. Contact Dr. Lewis to book an appointment today.
Is this Dr. Aaron Lewis affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Lewis is affiliated with Huntington Hospital (Pasadena, CA), City of Hope - Duarte Cancer Center, USC Arcadia Hospital, Henry Mayo Newhall Hospital, Eisenhower Health Main Campus, PIH Health Whittier 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
Where can I learn more about Surgical Oncologist?
Explore Surgical Oncologist 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 Aaron Lewis accepting new patients in South Pasadena, CA?
Yes, Dr. Aaron Lewis is accepting new patients at this time.
Does Dr. Aaron Lewis offer online booking?
Please contact Dr. Lewis's office at (626) 396-2900 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Aaron Lewis?
Please contact Dr. Lewis's office at (626) 396-2900 for information regarding telehealth appointment availability or for scheduling assistance.
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