ASPEN SURGERY CENTER
NPI 1710177795
Clinic/Center - Ambulatory Surgical in Walnut Creek, CA

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

3d radiation therapy planning

3D radiation therapy planning is a procedure that uses computer imaging to map out the area needing treatment. This ensures the radiation targets the disease precisely, while minimizing exposure to surrounding healthy tissues. It's a key step in preparing for effective radiation therapy.

This service was performed 53 times for 52 patients

Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm

This procedure involves using a flexible tube with a camera, called an endoscope, to gently expand narrowed areas in your esophagus, stomach, or upper small bowel. A small balloon is inflated, making it easier for food and liquid to pass through. It's safe and effective.

This service was performed 92 times for 83 patients

Banding of hemorrhoids using a flexible endoscope (colonoscope)

Banding of hemorrhoids using a colonoscope is a procedure to treat swollen blood vessels in your lower digestive tract. A flexible tube with a light and camera, called a colonoscope, helps locate the hemorrhoids. Then, tiny rubber bands are placed around them, cutting off their blood supply. This causes them to shrink and fall off.

This service was performed 12 times for 12 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

This service was performed 657 times for 640 patients

Biopsy of large bowel using a flexible endoscope

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

This service was performed 690 times for 689 patients

Biopsy of lining of uterus and/or removal of polyp using an endoscope

This procedure involves using a thin, flexible tool (endoscope) to examine and possibly remove a small tissue sample from the inner layer of your uterus. It may also involve removing a growth. It helps to identify any issues and plan the right treatment.

This service was performed 54 times for 54 patients

Biopsy of prostate gland

A biopsy of the prostate gland is a procedure where a small sample of tissue is taken from your body's internal gland, located near the bladder, for testing. This helps in diagnosing potential health issues. It's usually done with a fine needle and imaging technology for accuracy.

This service was performed 96 times for 96 patients

Biopsy or removal of deep lymph nodes of underarm

A biopsy or removal of deep underarm lymph nodes is a procedure where a small sample of lymph node tissue is taken for testing. This helps in diagnosing or ruling out conditions like infections or cancers. It involves a small incision and is typically done under local or general anesthesia.

This service was performed 48 times for 48 patients

Brachytherapy source, non-stranded, palladium-103, per source

Brachytherapy source, non-stranded, palladium-103, per source is a type of internal radiation treatment. Tiny radioactive seeds of palladium-103 are placed in or near the area needing treatment, providing targeted therapy while minimizing harm to surrounding tissues.

This service was performed 3,636 times for 61 patients

Colorectal cancer screening; colonoscopy on individual at high risk

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

This service was performed 132 times for 132 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

This service was performed 155 times for 155 patients

Complete laser vaporization of prostate including control of bleeding using an endoscope

This procedure involves using a special light instrument to carefully remove tissue from a gland located in the lower body. This helps improve the flow of body fluids. The process is done through a tube-like device and also controls any bleeding.

This service was performed 12 times for 12 patients

Complex application of radiation source

Complex application of radiation source is a medical procedure used in cancer treatment. It involves the careful placement of radioactive materials in or near the tumor. This helps to destroy cancer cells while minimizing damage to healthy tissues. It's a precise and targeted approach.

This service was performed 63 times for 62 patients

Complex removal of cataract with insertion of prosthetic lens

This procedure involves removing a cloudy lens (cataract) from your eye and replacing it with a clear, artificial lens. It helps restore vision that has been affected by the cataract. The operation is usually done under local anesthesia.

This service was performed 115 times for 101 patients

Control of bleeding of esophagus, stomach, and/or upper small bowel using a flexible endoscope

This procedure involves using a flexible tube with a light, called an endoscope, to examine and treat bleeding in the esophagus, stomach, or upper small bowel. It's a safe, effective way to control bleeding and ensure your digestive health.

This service was performed 23 times for 19 patients

Control of bleeding of upper large bowel using a flexible endoscope

This procedure involves using a flexible endoscope, a thin tube with a light and camera, to view and control bleeding in the upper large bowel. Special tools can be passed through the endoscope to stop the bleeding. It's a minimally invasive way to address this issue.

This service was performed 21 times for 21 patients

Correction of toe joint deformity

Correction of toe joint deformity is a procedure to fix misshapen toe joints. This can involve realigning the bones, removing bone or tissue, or implanting devices to improve joint function. It can help reduce pain and improve mobility.

This service was performed 17 times for 15 patients

Crushing of stone of ureter with insertion of stent using an endoscope

This procedure involves using a thin, flexible tube (endoscope) to locate and break down kidney stones in the ureter. After this, a small tube (stent) is inserted to help maintain an open pathway for urine to flow.

This service was performed 20 times for 20 patients

Crushing, fragmenting, and removal of bladder stones, less than 2.5 cm

This procedure involves breaking down and removing small stones found in your bladder. The stones are first crushed into smaller pieces, then removed to help alleviate discomfort and prevent further complications.

This service was performed 11 times for 11 patients

Design and construction of simple radiation treatment device

A simple radiation treatment device is designed and built to target specific areas in your body with high energy rays. This process is carefully planned to ensure that the radiation accurately reaches the area needing treatment, while minimizing exposure to healthy tissues.

This service was performed 63 times for 62 patients

Destruction and/or removal of growth of bladder and urethra using an endoscope, 0.5-2.0 cm

This procedure involves using a special instrument, an endoscope, to view and treat a small growth in the bladder and urethra. It's a minimally invasive method to remove or destroy growths measuring 0.5-2.0 cm, aiding in better urinary health.

This service was performed 15 times for 15 patients

Destruction and/or removal of growth of bladder and urethra using an endoscope, 2.0-5.0 cm

This procedure involves using a thin, flexible tool called an endoscope to examine and remove a growth in your bladder and urethra. The growth size ranges from 2.0-5.0 cm. This is done to ensure your urinary system functions properly.

This service was performed 16 times for 14 patients

Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope

This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.

This service was performed 16 times for 16 patients

Diagnostic exam of large bowel using a flexible endoscope

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

This service was performed 42 times for 42 patients

Dilation of fluid outflow drainage within eye

Dilation to improve eye fluid flow is a process where eye drops are used to widen or dilate your pupils. This allows more fluid to flow out of the eye, reducing pressure and helping to prevent or treat conditions like glaucoma.

This service was performed 59 times for 41 patients

Exam with injections of chemical for destruction of bladder using an endoscope

This procedure involves the use of a thin, flexible tube with a light (endoscope) for internal examination. A chemical is then injected to help eliminate specific issues in the bladder. It's a standard and safe process.

This service was performed 30 times for 25 patients

Extensive repair of turning-inward eyelid defect

This procedure helps correct an eyelid defect where the eyelid turns inward, causing discomfort or vision issues. A surgeon makes precise adjustments to the eyelid's structure, alleviating the inward turn and improving eye health and comfort.

This service was performed 22 times for 15 patients

Extensive repair of turning-outward eyelid defect

This procedure corrects an eyelid defect where the eyelid turns outward, exposing the eye. The extensive repair involves surgical techniques to reshape the eyelid and ensure it functions properly. This helps protect the eye and improve comfort.

This service was performed 26 times for 23 patients

Extracapsular removal of cataract with insertion of artificial lens and insertion of drainage device in front chamber of eye

This is a two-part eye procedure. First, a cloudy lens (cataract) is removed from its outer layer and replaced with an artificial lens to improve vision. Second, a drainage device is inserted into the front part of the eye to manage fluid levels, preventing pressure build-up.

This service was performed 39 times for 23 patients

Full thickness skin graft to nose, ears, eyelids, or lips, 20.0 sq cm or less

A full thickness skin graft is a procedure where a layer of skin is taken from one area of the body and transplanted to another. If it's done on the nose, ears, eyelids, or lips, it helps restore these areas when damaged. The size of the graft is 20.0 sq cm or less.

This service was performed 22 times for 20 patients

Imaging of urinary tract following injection of a contrast agent

This procedure involves injecting a contrast agent into your body to help highlight the urinary tract during imaging. The contrast agent makes your urinary tract more visible on the images, providing detailed information about its structure and function. This can help in diagnosing any potential issues.

This service was performed 46 times for 38 patients

Incision of tear duct using an endoscope

This procedure involves making a small cut in your tear duct with a special tool called an endoscope. It helps to improve tear drainage and reduce issues like excessive tearing or eye infections. It's a common, safe procedure.

This service was performed 13 times for 13 patients

Injection beneath lining of large bowel using a flexible endoscope

This procedure involves a flexible tube, called an endoscope, being inserted into the large bowel. A small needle is then passed through the tube to inject medication under the bowel lining. This is typically done to treat inflammation or bleeding.

This service was performed 15 times for 15 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level

This procedure involves injecting a mix of numbing and anti-inflammatory medication into a specific nerve root in the lower back. It helps manage pain and reduce inflammation. The process is guided by imaging technology for precision.

This service was performed 44 times for 25 patients

Injection of implant material beneath lining of bladder and/or urethra using an endoscope

This is a procedure where a substance is inserted under the bladder or urethra lining using a special instrument called an endoscope. This helps to support these areas and improve their function. It's done in a safe, controlled medical environment.

This service was performed 21 times for 20 patients

Injection, non-radioactive, non-contrast, visualization adjunct (e.g., methylene blue, isosulfan blue), 1 mg

This procedure involves an injection of a non-radioactive, non-contrast substance like methylene blue or isosulfan blue. It's used to enhance visualization during certain medical procedures, improving accuracy and safety.

This service was performed 695 times for 46 patients

Injection, onabotulinumtoxina, 1 unit

Onabotulinumtoxina, also known as Botox, is a medication injected into muscles. It's used to treat various conditions by blocking nerve activity in the muscles, causing a temporary reduction in muscle activity. The units refer to the dosage.

This service was performed 4,550 times for 26 patients

Insertion of central venous tube with port (5 years or older)

A central venous tube with port is a small, flexible tube inserted into a large vein, usually in the chest. It allows for easy administration of medication, fluids, or blood products over a long period. A port is attached under the skin for easy access. It's safe for individuals aged 5 and above.

This service was performed 53 times for 52 patients

Insertion of guide wire with dilation of esophagus using a flexible endoscope

This is a procedure where a thin tube, called an endoscope, is gently passed through your mouth into your esophagus. A guide wire is then inserted to help widen any narrow areas. This helps improve swallowing and reduce discomfort.

This service was performed 14 times for 14 patients

Insertion of needle or tube into prostate for radiation therapy

This procedure involves placing a fine needle or small tube into a gland located in the lower part of your body. It's done to deliver radiation therapy directly to the area, helping to treat conditions effectively. It's performed by a trained professional.

This service was performed 63 times for 62 patients

Insertion of stent in ureter using an endoscope

This procedure involves placing a small, flexible tube (stent) in your body's drainage system to help urine flow from the kidneys to the bladder. An endoscope, a thin tube with a light and camera, is used for precise placement.

This service was performed 29 times for 18 patients

Partial removal of breast

A partial removal of the breast, also known as a lumpectomy, involves taking out a portion of the breast tissue to eliminate concerning cells. It's typically performed when the problem area is limited in size. This procedure helps to preserve most of the breast's appearance while aiming to remove all the unhealthy cells.

This service was performed 89 times for 80 patients

Probing of nasal tear duct with insertion of tube or stent

This procedure treats blocked tear ducts. A thin probe is gently inserted into the tear duct to clear any blockage. Afterwards, a small tube or stent is placed to keep the pathway open, allowing tears to drain normally again.

This service was performed 17 times for 16 patients

Processing, preserving and transporting corneal tissue

Processing, preserving, and transporting corneal tissue involve careful steps to ensure its viability for transplantation. The tissue is first cleaned, then preserved in a special solution. It's packed in a temperature-controlled container for safe transport to its destination.

This service was performed 27 times for 23 patients

Reconstruction of up to 2/3 of eyelid with tissue from opposite eyelid

This procedure involves reconstructing a significant portion of your eyelid using tissue from the other eyelid. It's performed when a large part of the eyelid is damaged or missing. The goal is to restore the function and appearance of your eyelid.

This service was performed 23 times for 22 patients

Removal of bone from lower spine for decompression of nerve tissue using imaging guidance, accessed through the skin

This procedure involves removing a small portion of bone from your lower spine. The goal is to relieve pressure on your nerve tissue, improving comfort and mobility. It is done through the skin using imaging technology to ensure precision and safety.

This service was performed 33 times for 32 patients

Removal of cataract with insertion of prosthetic lens

This is a procedure where a cloudy lens in your eye, known as a cataract, is removed. After removal, a clear artificial lens is inserted. This helps to restore your vision, enabling you to see clearly again.

This service was performed 1,567 times for 1,002 patients

Removal of excessive skin and fat of upper eyelid

This procedure, also known as upper eyelid surgery, is performed to remove excess skin and fat from the upper eyelid. It can help improve vision if heavy eyelids hinder it, and can also enhance the appearance of the eyes. It's a common, safe procedure.

This service was performed 140 times for 72 patients

Removal of eye fluid (vitreous) between lens and retina

This procedure, known as a vitrectomy, involves removing some or all of the vitreous humor, the clear gel-like substance in the eye. It's done to treat various eye conditions, like retinal detachment or macular hole. The aim is to improve or stabilize vision. It's performed under local or general anesthesia.

This service was performed 22 times for 21 patients

Removal of growth under skin of back or lower sides, 3.0 cm or more

This procedure involves surgical removal of a growth located under the skin of your back or lower sides. If the growth is 3.0 cm or larger, it may require a more extensive procedure. This is done to prevent potential health complications and improve comfort.

This service was performed 18 times for 16 patients

Removal of large bowel tissue using a flexible endoscope

This procedure, known as a colonoscopy, involves using a flexible endoscope to examine and potentially remove tissue from the large intestine. The endoscope allows the doctor to view the bowel lining directly and remove any abnormal tissue for further analysis.

This service was performed 19 times for 19 patients

Removal of membrane of retina with removal of internal limiting membrane of retina

This procedure involves the surgical removal of a thin layer, called the membrane, from the retina. It also includes the removal of the innermost layer of the retina, known as the internal limiting membrane. This can help improve vision.

This service was performed 51 times for 51 patients

Removal of nasal air passage under lining tissue

This procedure, often done to improve breathing or address sinus issues, involves the removal of tissue from the lining of the nasal air passage. It's performed under anesthesia and recovery time varies based on individual health status.

This service was performed 31 times for 16 patients

Removal of polyps or growths of esophagus, stomach, and/or upper small bowel using an endoscope with mechanical snare

This procedure involves the use of a thin, flexible instrument called an endoscope to visualize and remove abnormal growths, known as polyps, from the esophagus, stomach, or upper small bowel. A tool called a mechanical snare is used to safely cut and remove these growths.

This service was performed 15 times for 15 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

This service was performed 645 times for 639 patients

Removal of tissue, muscle, and membrane to correct eyelid drooping or paralysis

This procedure involves the removal of excess tissue, muscle, and membrane from the eyelid to correct drooping or paralysis. It helps improve vision and appearance. The operation is performed under local or general anesthesia, ensuring patient comfort throughout.

This service was performed 96 times for 60 patients

Repair of groin hernia using an endoscope

This procedure involves the use of an endoscope, a thin tube with a camera, to repair a hernia in the groin area. The surgeon makes small incisions, inserts the endoscope, and uses special tools to fix the hernia. This minimally invasive technique often results in quicker recovery times.

This service was performed 94 times for 65 patients

Repair of tendon of upper eyelid

Repair of the tendon of the upper eyelid is a surgical procedure aimed at fixing a droopy eyelid. This condition can affect your vision and appearance. The procedure involves tightening the tendon to lift the eyelid to its normal position, improving both function and aesthetics.

This service was performed 34 times for 21 patients

Reshaping of nasal cartilage

Reshaping of nasal cartilage, also known as rhinoplasty, is a surgical procedure to modify the structure of the nose for aesthetic or functional purposes. It involves adjusting the cartilage and bone in the nose to achieve the desired shape or to improve breathing.

This service was performed 15 times for 15 patients

Shock wave crushing of kidney stones

Shock wave crushing of kidney stones, also known as Extracorporeal Shock Wave Lithotripsy (ESWL), is a non-invasive treatment. It involves the use of sound waves to break down kidney stones into small pieces that can easily pass through your urinary tract.

This service was performed 47 times for 41 patients

Transplantation of outer layer of corneal tissue

The transplantation of the outer layer of corneal tissue is a procedure to replace damaged or diseased corneal tissue with healthy tissue from a donor. This can improve vision and alleviate pain or discomfort.

This service was performed 21 times for 18 patients

Ultrasound scan of pelvic region through rectum

An ultrasound scan of the pelvic region through the rectum is a medical procedure where a small, smooth device is gently inserted into the rectum. This device uses sound waves to create images of the internal structures in the lower abdomen, aiding in diagnosis and treatment planning.

This service was performed 97 times for 97 patients

CLIA Information

The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:

CLIA Number

05D1076006

Facility Type

Ambulatory Surgery Center

Certificate Effective Date

November 02, 2025

Certificate Expiration Date

November 01, 2027

Laboratory Director

HAYWON LIEH, MD

Certificate Type

Certificate of Waiver

Certificate Type Description

This CLIA certificate is issued to Aspen Surgery Center to perform only waived tests. CLIA defines waived tests as simple tests with a low risk for an incorrect result. Waived tests include certain tests listed in CLIA regulations, tests cleared by the FDA for home use and tests approved by the FDA for waived status and that meet CLIA waiver criteria.

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