DR. CHRISTOPHER JOHN CARLSON M.D.
NPI 1821011065
Internal Medicine - Gastroenterology in Seattle, WA

Q: What is Christopher Carlson's NPI number?

The NPI number for Christopher Carlson is 1821011065. It was assigned to this individual provider in the NPPES registry on July 26, 2006.

Q: What is Christopher Carlson's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Active since July 26, 2006PECOS EnrolledAccepts Medicare Assignment

82.84/100

CMS Quality Rating

325 9TH AVE, SEATTLE, WA 98104(206) 731-3241 Get Directions Write a Review

NPPES record last updated: April 16, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Christopher John Carlson M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. CHRISTOPHER JOHN CARLSON M.D. (NPI 1821011065) is an individual gastroenterology provider in Seattle, Washington, licensed in Washington (MD00042230) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Providence Centralia Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1821011065

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameDR. CHRISTOPHER JOHN CARLSONCredential: M.D.

Location Address325 9TH AVESeattle, WA 98104-2420

Mailing AddressPo Box 50095Seattle, WA 98145-5095 · (206) 543-6420

Phone(206) 731-3241

Sole ProprietorNo

Medical School CMSState University Of New York At Buffalo School Of MedicineGraduated 1999

Enumeration DateJuly 26, 2006

Last NPPES UpdateApril 16, 2021

NPPES CertifiedApril 16, 2021

✔ NPI 1821011065 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in WA · MD00042230

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

325 9TH AVE, Seattle, WA 98104

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Secondary Practice Locations 2

Location 15350 Tallman Ave NWSeattle, WA 98107-5902 · Phone (206) 215-4250 · Fax (206) 215-4252

Location 21221 Madison St Ste 1221Seattle, WA 98104-3588 · Phone (206) 215-4250 · Fax (206) 215-4252

Other Identifiers 2

Medicaid1821011065WA

Other0230817WA · L&i

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Christopher John Carlson M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2163426669

PECOS Enrollment IDI20060913000536

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Christopher Carlson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Swedish Health Services

0.3 mi

Internal Medicine

800 5TH AVE, STE 600
Seattle, WA 98104

Reassigned Medicare billing, Washington enrollment
1,270 clinicians in this Medicare group

NPI 1689612954 (206) 320-2700

Pacmed Clinics

12 mi

Multi-Specialty

601 S CARR RD, SUITE 100
Renton, WA 98055

Reassigned Medicare billing, Washington enrollment
291 clinicians in this Medicare group

NPI 1720023641 (425) 227-3700

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 15

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

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.

53 services46 patients

Removal of stone or debris from bile or pancreatic duct using a flexible endoscope 43264

This procedure, called an endoscopic retrograde cholangiopancreatography (ERCP), involves using a flexible tube with a camera (endoscope) to locate and remove stones or debris from your bile or pancreatic duct. It's a non-surgical method to clear the ducts, enhancing your digestive health.

46 services40 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

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.

36 services35 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

35 services30 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

34 services29 patients

Insertion of guide wire with dilation of esophagus using a flexible endoscope 43248

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.

30 services11 patients

Insertion of stent into pancreatic or bile duct using a flexible endoscope 43274

This procedure involves the placement of a tiny tube, known as a stent, into your pancreatic or bile duct. A flexible endoscope, a long, thin instrument with a light and camera, is used. It aids in relieving blockages and improving flow in these ducts.

25 services19 patients

Incision of pancreatic outlet using a flexible endoscope 43262

This procedure involves a small cut in the outlet of the pancreas using a flexible tube with a camera, called an endoscope. It helps doctors diagnose and treat conditions affecting the pancreas, enhancing patient comfort and recovery.

20 services20 patients

Ultrasound guided needle aspiration or biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43242

This procedure involves using an ultrasound to guide a needle to specific areas in the esophagus, stomach, or upper small bowel. A flexible endoscope is used to reach these areas. The needle collects a small sample for testing.

19 services19 patients

Replacement of stent in pancreatic or bile duct using a flexible endoscope 43276

This procedure involves replacing an existing stent in your pancreatic or bile duct. A flexible endoscope, a tube-like device with a light and camera, is used to view and access the area. The old stent is removed and a new one is placed to help keep the duct open.

19 services13 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

18 services18 patients

Ultrasound exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope through mouth 43237

This procedure involves a flexible tube with a camera and ultrasound device, inserted through the mouth to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like inflammation, tumors, or other abnormalities.

16 services16 patients

Biopsy of large bowel using a flexible endoscope 45380

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.

14 services14 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

14 services11 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

13 services12 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Providence Centralia Hospital

Acute Care Hospitals · Centralia, WA

3/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number500019

Location914 S Scheuber RoadCentralia, WA 98531 · Lewis County

Emergency services Birthing friendly

Swedish Medical Center / Cherry Hill

Acute Care Hospitals · Seattle, WA

3/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number500025

Location500 17th AvenueSeattle, WA 98122 · King County

Emergency services

Swedish Edmonds Hospital

Acute Care Hospitals · Edmonds, WA

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number500026

Location21601 76th Avenue WestEdmonds, WA 98026 · Snohomish County

Emergency services Birthing friendly

Swedish Medical Center

Acute Care Hospitals · Seattle, WA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number500027

Location747 BroadwaySeattle, WA 98122 · King County

Emergency services Birthing friendly

Olympic Medical Center

Acute Care Hospitals · Port Angeles, WA

4/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number500072

Location939 Caroline StPort Angeles, WA 98362 · Clallam County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98104 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$143.76 typical visit price

range $63.67 – $189.37

Typical copayment $35.94 (range $15.91 – $47.34)

Most-billed visit code 99204

Established Patient

$111.00 typical visit price

range $21.12 – $155.00

Typical copayment $27.75 (range $5.28 – $38.75)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

82.84/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

82.14

Promoting Interoperability

100

Improvement Activities

Cost

60.65

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Parenteral nutrition solution, not otherwise specified, 10 grams lipids B4185

Other-Enteral and Parenteral · category OB005N

1 supplier51 claims1,496 services$11.14 avg. paid by Medicare

Parenteral nutrition solution; compounded amino acid and carbohydrates with electrolytes, trace elements and vitamins, including preparation, any strength, over 100 grams of protein - premix B4199

Other-Enteral and Parenteral · category OB005N

1 supplier51 claims349 services$320.47 avg. paid by Medicare

Parenteral nutrition supply kit; premix, per day B4220

Other-Enteral and Parenteral · category OB005N

1 supplier51 claims349 services$8.03 avg. paid by Medicare

Parenteral nutrition administration kit, per day B4224

Other-Enteral and Parenteral · category OB005N

1 supplier51 claims349 services$25.07 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SANDRA K WALKER ARNP

Nurse Practitioner (Acute Care)

325 9TH AVE
SEATTLE, WA 98104

King County (206) 598-0502

JULIA J VISSER DPT

Physical Therapist

325 9TH AVE, BOX 359920
SEATTLE, WA 98104

King County (206) 744-1675

GENIA J MONCADA

Pharmacist

325 9TH AVE, MAILSTOP 359912
SEATTLE, WA 98104

King County (206) 731-3219

JACQUELINE M. KIM LICSW, MSW

Social Worker (Clinical)

325 9TH AVE, BOX 359760
SEATTLE, WA 98104

King County (206) 744-8511

MS. DIANE E WHEELER MS, PA-C

Physician Assistant (Medical)

325 9TH AVE
SEATTLE, WA 98104

King County (206) 744-3000

AMELIA V. RIVERA

Physical Therapist

325 9TH AVE
SEATTLE, WA 98104

King County (206) 774-3300

TIMOTHY WILLIAM MENZA MD, PHD

Internal Medicine (Infectious Disease)

325 9TH AVE
SEATTLE, WA 98104

King County (206) 520-5000

DEMETRIOS TEREZAKIS

Occupational Therapist

325 9TH AVE
SEATTLE, WA 98104

King County (206) 744-6112

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Christopher Carlson's NPI number?

The NPI number for Christopher Carlson is 1821011065. It was assigned to this individual provider in the NPPES registry on July 26, 2006.

Where is Christopher Carlson located?

Christopher Carlson practices at 325 9th Ave, Seattle, WA 98104. The listed phone number is (206) 731-3241.

What is Christopher Carlson's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Christopher Carlson enrolled in Medicare?

Yes. Christopher Carlson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Christopher Carlson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Christopher Carlson reassigns Medicare benefits to 2 organizations: Swedish Health Services (Seattle, WA) and Pacmed Clinics (Renton, WA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Christopher Carlson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Christopher Carlson accept?

Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Christopher Carlson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Christopher Carlson affiliated with any hospitals?

According to CMS data, Christopher Carlson is affiliated with Providence Centralia Hospital, Swedish Medical Center / Cherry Hill, Swedish Edmonds Hospital, Swedish Medical Center and Olympic Medical Center.

When was this NPI record last updated?

The NPPES record for Christopher Carlson was last updated on April 16, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.