DR. TIMOTHY LEIGH LARSON MD
NPI 1679500433
Radiology - Neuroradiology in Lynnwood, WA
NPI Status: Active since June 27, 2006
Contact Information
19020 33RD AVE W STE 210
LYNNWOOD, WA
ZIP 98036
Phone: (425) 563-1500
Fax: (425) 563-1501
NPPES record last updated: March 29, 2019. Verified against the NPPES registry weekly; last sync: July 19, 2026.
Record update history: Apr 12, 2017, Nov 11, 2016 (2 updates tracked since 2016).
- Individual
- Male
- Years of Experience 44
- Radiology
- Neuroradiology
- Accepts Insurance
- Accepts Medicare Approved Payment
- PECOS Enrolled
- Medicare Quality Reporting
About TIMOTHY LARSON
This page provides the complete NPI Profile along with additional information for Timothy Larson, a provider established in Lynnwood, Washington with a medical specialization in Radiology, focusing in neuroradiology and more than 44 years of experience. He graduated from University Of Washington School Of Medicine in 1983. The healthcare provider is registered in the NPI registry with number 1679500433 assigned on June 2006. The practitioner's primary taxonomy code is 2085N0700X with license number MD00024859 (WA). The provider is registered as an individual and his NPI record was last updated 7 years ago.
- NPI
- 1679500433
- Provider Name
- DR. TIMOTHY LEIGH LARSON MD
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 19020 33RD AVE W STE 210 LYNNWOOD, WA 98036
- Location Phone
- (425) 563-1500
- Location Fax
- (425) 563-1501
- Mailing Address
- 19020 33RD AVE W STE 210 LYNNWOOD, WA 98036
- Mailing Phone
- (425) 563-1500
- Mailing Fax
- (425) 563-1374
- Medical School Name
- UNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE
- Graduation Year
- 1983
- Is Sole Proprietor?
- No
- Enumeration Date
- 06-27-2006
- Last Update Date
- 03-29-2019
- Code Navigator
Location Map
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
Radiology Neuroradiology
- Taxonomy Code
- 2085N0700X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- MD00024859
- License State
- WA
- Taxonomy Description
- A radiologist who diagnoses and treats diseases utilizing imaging procedures as they relate to the brain, spine and spinal cord, head, neck and organs of special sense in adults and children.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 2085R0202X | Allopathic & Osteopathic Physicians | Radiology | MD00024859 (WA) |
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
- Premera Blue Cross Alaska One Gold - PPO
- Premera Blue Cross Preferred Bronze 5800 HSA - PPO
- Premera Blue Cross Preferred Bronze 6350 - PPO
- Premera Blue Cross Preferred Gold 1500 - PPO
- Premera Blue Cross Preferred Silver 4500 - PPO
- Premera Blue Cross Standard Bronze II - PPO
- Premera Blue Cross Standard Gold - PPO
- Premera Blue Cross Standard Silver - PPO
- Premera Blue Cross Family Dental - PPO
- Premera Blue Cross Pediatric Dental - PPO
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Additional Identifiers
The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.
| Identifier | Type / Code | Identifier State | Identifier Issuer |
|---|---|---|---|
| 0369898 | OTHER (01) | WA | L&I-EVERGREEN RADIA |
| 0384450 | OTHER (01) | WA | L&I-SOUTH SOUND RADIOLOGY |
| 0369895 | OTHER (01) | WA | L&I-RADIA REST OF WA |
| 1016017 | MEDICAID (05) | WA | |
| 0369896 | OTHER (01) | WA | L&I-RADIA KING COUNTY |
| 0369897 | OTHER (01) | WA | L&I-SWEDISH RADIA EDMONDS |
| 8123259 | MEDICAID (05) | WA |
Medicare Participation & PECOS Enrollment Status
Timothy Larson is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.
Timothy Larson is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.
What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.
Is the provider registered in PECOS? Yes
PECOS PAC ID: 2567358831
What is the PECOS Associate Control ID?
A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.PECOS Enrollment ID: I20080509000486
What is the Provider Enrollment ID?
The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.Accepts Medicare Assignment? Yes
What does it mean "accepts medicare assignment"?
When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes
Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes
Eligible to Order or Refer a Home Health Agency (HHA): Yes
Eligible to Order or Refer Power Mobility Devices: Yes
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.
Ct scan head or brain without contrast
Ct scan head or brain without contrast
Ct scan of blood vessels of head with contrast
Ct scan of blood vessels of neck with contrast
Ct scan of upper spine without contrast
Mri scan of brain before and after contrast
Mri scan of brain without contrast
X-ray lower and sacral spine, minimum of 6 views
X-ray of lower and sacral spine, 2-3 views
X-ray of lower and sacral spine, 2-3 views
X-ray of lower and sacral spine, minimum of 4 views
X-ray of lower and sacral spine, minimum of 4 views
X-ray of middle and lower spine, 2 views
X-ray of middle spine, 2 views
X-ray of middle spine, 3 views
X-ray of middle spine, 3 views
X-ray of upper spine, 2-3 views
X-ray of upper spine, 2-3 views
X-ray of upper spine, 4-5 views
X-ray of upper spine, 4-5 views
A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.
This service was performed 127 times for 125 patientsA CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.
This service was performed 17 times for 13 patientsA CT scan of the head's blood vessels with contrast is a diagnostic procedure. A special dye (contrast) is injected into your body to make the blood vessels visible on the scan. This helps identify issues like blockages or abnormalities in your head's blood vessels.
This service was performed 29 times for 29 patientsA CT scan of the neck's blood vessels with contrast is a diagnostic procedure. It uses X-rays and a special dye to create detailed images of your neck's blood vessels. This helps doctors detect issues such as blockages or abnormalities.
This service was performed 28 times for 28 patientsA CT scan of the upper spine without contrast is a non-invasive imaging test that uses X-rays to capture detailed images of your neck and upper back. It helps in identifying issues like fractures, tumors, or infections. No dye (contrast) is used in this scan.
This service was performed 21 times for 21 patientsAn MRI scan of the brain, both before and after contrast, helps visualize different brain structures. Initially, images are taken without a contrast agent. Then, a safe dye is injected which helps highlight certain areas, providing clearer, more detailed images.
This service was performed 13 times for 13 patientsAn MRI scan of the brain without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your brain. It helps in detecting abnormalities like tumors, stroke, inflammation, or infection.
This service was performed 26 times for 26 patientsAn X-ray of the lower and sacral spine involves capturing images of the bones in your lower back and tailbone area. It helps to identify issues like fractures, infections, or degenerative diseases. A minimum of 6 views ensures a comprehensive examination.
This service was performed 11 times for 11 patientsAn X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.
This service was performed 101 times for 97 patientsAn X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.
This service was performed 75 times for 60 patientsAn X-ray of the lower and sacral spine involves capturing images of your lower back and tailbone area. It helps in identifying issues like fractures, arthritis, or other abnormalities. At least four different angles or 'views' are taken to get a comprehensive picture.
This service was performed 77 times for 74 patientsAn X-ray of the lower and sacral spine involves capturing images of your lower back and tailbone area. It helps in identifying issues like fractures, arthritis, or other abnormalities. At least four different angles or 'views' are taken to get a comprehensive picture.
This service was performed 30 times for 25 patientsAn X-ray of the middle and lower spine, or 2-view lumbar spine X-ray, involves capturing images of your back. This helps detect issues like fractures, infections, or other abnormalities. It's painless and quick, taking only a few minutes.
This service was performed 11 times for 11 patientsAn X-ray of the middle spine, or thoracic spine, involves capturing two different images of the area. This non-invasive procedure uses small amounts of radiation to visualize the bones and tissues in your back, helping to identify any abnormalities or injuries.
This service was performed 19 times for 18 patientsAn X-ray of the middle spine, with 3 views, is a diagnostic procedure where images are taken from different angles (front, side, and angled) to assess the health of your spine. It helps identify issues like fractures, tumors, or degenerative conditions.
This service was performed 20 times for 20 patientsAn X-ray of the middle spine, with 3 views, is a diagnostic procedure where images are taken from different angles (front, side, and angled) to assess the health of your spine. It helps identify issues like fractures, tumors, or degenerative conditions.
This service was performed 14 times for 11 patientsAn X-ray of the upper spine, with 2-3 views, is a painless procedure that employs a small amount of radiation to capture images of your neck and upper back. It assists in diagnosing conditions like arthritis, fractures, or spinal deformities.
This service was performed 36 times for 35 patientsAn X-ray of the upper spine, with 2-3 views, is a painless procedure that employs a small amount of radiation to capture images of your neck and upper back. It assists in diagnosing conditions like arthritis, fractures, or spinal deformities.
This service was performed 32 times for 25 patientsAn X-ray of the upper spine with 4-5 views is a non-invasive imaging test. It uses radiation to capture detailed images of the bones and structures in your neck and upper back. This procedure helps identify issues like fractures, infections, or deformities.
This service was performed 35 times for 35 patientsAn X-ray of the upper spine with 4-5 views is a non-invasive imaging test. It uses radiation to capture detailed images of the bones and structures in your neck and upper back. This procedure helps identify issues like fractures, infections, or deformities.
This service was performed 13 times for 11 patientsQuality Reporting
The provider participated in CMS Quality Payment Program. The Quality Payment Program aims to improve population health, reduce costs and improve the care received by Medicare beneficiaries. The following quality measures meet Medicare's statistical reporting standards. Not all providers report the same information, because not all providers give the same services to patients. The quality information is just a snapshot of some the care providers give to their patients. Reporting more or less information is not a reflection of quality.
| Quality Measure | Performance | Number of Patients |
|---|
Find Provider Hospital Affiliations - Privileges
Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.
Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Timothy Larson is affiliated with the following medical facilities:
| Hospital Name | Address | Phone | Hospital Type | Overall Rating |
|---|---|---|---|---|
| PROVIDENCE REGIONAL MEDICAL CENTER EVERETT | 1321 COLBY AVENUE EVERETT, WA 98201 | (425) 261-2000 | Acute Care Hospitals | |
| PROVIDENCE CENTRALIA HOSPITAL | 914 S SCHEUBER ROAD CENTRALIA, WA 98531 | (360) 736-2803 | Acute Care Hospitals | |
| PROVIDENCE ST PETER HOSPITAL | 413 LILLY ROAD NE OLYMPIA, WA 98506 | (360) 491-9480 | Acute Care Hospitals | |
| OVERLAKE HOSPITAL MEDICAL CENTER | 1035-116TH AVE NE BELLEVUE, WA 98004 | (425) 688-5000 | Acute Care Hospitals | |
| ARBOR HEALTH MORTON HOSPITAL | 521 ADAMS STREET MORTON, WA 98356 | (360) 496-5112 | Critical Access Hospitals |
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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 1679500433, we treat the final digit (3) 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 57. The final step is to find the difference between that total and the next multiple of ten (60 - 57 = 3).
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.
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.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 57 is 60. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
LYNNWOOD, WA 98036
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1679500433, enumerated as an "individual" on June 27, 2006.
The provider is located at 19020 33RD AVE W STE 210 LYNNWOOD, WA 98036 and the phone number is (425) 563-1500.
Radiology with taxonomy code 2085N0700X and a focus in Neuroradiology.
The provider might be accepting Accepts: Premera Blue Cross Blue Shield of Alaska, Medicare. Please consult your insurance carrier or call the provider to verify.
Timothy Larson is affiliated with: PROVIDENCE REGIONAL MEDICAL CENTER EVERETT, PROVIDENCE CENTRALIA HOSPITAL, PROVIDENCE ST PETER HOSPITAL, OVERLAKE HOSPITAL MEDICAL CENTER and ARBOR HEALTH MORTON HOSPITAL.
