OAK TREE SURGICAL CENTER LLC
NPI 1831428861
Clinic/Center - Ambulatory Surgical in Thousand Oaks, CA

NPI Status: Active since December 22, 2009

Contact Information

2230 LYNN RD
SUITE 320
THOUSAND OAKS, CA
ZIP 91360
Phone: (805) 371-8400
Fax: (805) 371-8404

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  • Organization
  • Clinic/Center
  • Ambulatory Surgical
  • CLIA Number: 05D2005313
  • CLIA Cert. Type: Ambulatory Surgery Center
  • CLIA Exp. Date: 03-23-2028

About OAK TREE SURGICAL CENTER LLC

This page provides the complete NPI Profile along with additional information for Oak Tree Surgical Center Llc, a provider established in Thousand Oaks, California operating as a Clinic/center, focusing in ambulatory surgical . The healthcare provider is registered in the NPI registry with number 1831428861 assigned on December 2009. The practitioner's primary taxonomy code is 261QA1903X. The provider is registered as an organization and their NPI record was last updated 14 years ago. The authorized official of this NPI record is Dr. Shahram Daneshgar M.d. (Owner)

NPI
1831428861
Provider Name
OAK TREE SURGICAL CENTER LLC
Entity Type
Organization
Location Address
2230 LYNN RD SUITE 320 THOUSAND OAKS, CA 91360
Location Phone
(805) 371-8400
Location Fax
(805) 371-8404
Mailing Address
2230 LYNN RD. SUITE 320 THOUSAND OAKS, CA 91360
Mailing Phone
(805) 371-8400
Mailing Fax
(805) 371-8404
Is Sole Proprietor?
No
Is Organization Subpart?
No
Enumeration Date
12-22-2009
Last Update Date
05-18-2012
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Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Clinic/Center Ambulatory Surgical

Taxonomy Code
261QA1903X
Type
Ambulatory Health Care Facilities

Authorized Official

The authorized official is the designated individual with the legal authority to make changes to the provider’s official NPI record. For organizations, the authorized official must be a general partner, chairman of the board, CEO, CFO or a direct owner holding at least a 5 percent stake in the medical organization.

Authorized Official Name

DR. SHAHRAM DANESHGAR M.D.

Authorized Official Title
OWNER
Authorized Official Phone
(805) 371-8404

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.

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 225 times for 223 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 66 times for 66 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 187 times for 186 patients

Dilation of esophagus

Dilation of the esophagus is a procedure aimed to stretch or open up your esophagus (the tube connecting your mouth to your stomach) when it's narrow. It helps to improve swallowing and alleviate discomfort. It's typically performed using a flexible tube or balloon, under sedation.

This service was performed 13 times for 13 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 162 times for 160 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
05D2005313
Facility Type
Ambulatory Surgery Center
Certificate Effective Date
March 24, 2026
Certificate Expiration Date
March 23, 2028
Laboratory Director
SHAHRAM DANESHGAR
Certificate Type
Certificate of Waiver
Certificate Type Description
This CLIA certificate is issued to Oak Tree Surgical Center Llc 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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NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1831428861, we treat the final digit (1) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 69. The final step is to find the difference between that total and the next multiple of ten (70 - 69 = 1).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
8
Unchanged
Pos 3
3
Doubled → 6
Pos 4
1
Unchanged
Pos 5
4
Doubled → 8
Pos 6
2
Unchanged
Pos 7
8
Doubled → 16 → 1 + 6
Pos 8
8
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
Check
1
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 3 → 6 4 → 8 8 → 16 → 7 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 8 + 6 + 1 + 8 + 2 + 1 + 6 + 8 + 1 + 2 + 24 = 69

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 69 is 70. The difference is the calculated check digit.

70 - 69 = 1
This NPI is valid
The calculated check digit is 1, which matches the last digit of 1831428861.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Internal Medicine
2230 LYNN RD, STE 230
THOUSAND OAKS, CA 91360
Internal Medicine
2230 LYNN RD, SUITE 200
THOUSAND OAKS, CA 91360
Internal Medicine
2230 LYNN RD, SUITE 200
THOUSAND OAKS, CA 91360
Obstetrics & Gynecology
2230 LYNN RD, SUITE 200
THOUSAND OAKS, CA 91360
Internal Medicine
2230 LYNN RD, SUITE 200
THOUSAND OAKS, CA 91360
Family Medicine
2230 LYNN RD, SUITE 200
THOUSAND OAKS, CA 91360
Radiology (Radiation Oncology)
2230 LYNN RD, SUITE 103
THOUSAND OAKS, CA 91360
Dermatology
2230 LYNN RD, 105
THOUSAND OAKS, CA 91360
Ophthalmology
2230 LYNN RD, SUITE #102
THOUSAND OAKS, CA 91360
Urology
2230 LYNN RD, SUITE 350
THOUSAND OAKS, CA 91360
Clinical Medical Laboratory
2230 LYNN RD, SUITE 200
THOUSAND OAKS, CA 91360
Physician Assistant (Medical)
2230 LYNN RD, SUITE 200
THOUSAND OAKS, CA 91360
Family Medicine
2230 LYNN RD, SUITE 200
THOUSAND OAKS, CA 91360
Specialist
2230 LYNN RD, SUITE 310
THOUSAND OAKS, CA 91360
Physical Therapist
2230 LYNN RD, SUITE 250
THOUSAND OAKS, CA 91360
Internal Medicine (Cardiovascular Disease)
2230 LYNN RD, SUITE 210
THOUSAND OAKS, CA 91360
Specialist
2230 LYNN RD, 330
THOUSAND OAKS, CA 91360
Internal Medicine (Gastroenterology)
2230 LYNN RD, SUITE 104
THOUSAND OAKS, CA 91360
Internal Medicine
2230 LYNN RD, SUITE 200
THOUSAND OAKS, CA 91360
Ophthalmology
2230 LYNN RD, STE 102
THOUSAND OAKS, CA 91360

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1831428861, enumerated as an "organization" on December 22, 2009.

The provider is located at 2230 LYNN RD SUITE 320 THOUSAND OAKS, CA 91360 and the phone number is (805) 371-8400.

Clinic/Center with taxonomy code 261QA1903X and a focus in Ambulatory Surgical.