Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MR. MARK LEWIS ANSTADT ARNP
NPI 1144414145
Nurse Practitioner in Seattle, WA

Q: What is Mark Anstadt's NPI number?

The NPI number for Mark Anstadt is 1144414145. It was assigned to this individual provider in the NPPES registry on September 1, 2007.

Q: What is Mark Anstadt's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Q: When was this NPI record last updated?

The NPPES record for Mark Anstadt was last updated on June 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 52 days 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.

Active since September 01, 2007PECOS EnrolledAccepts Medicare Assignment

904 7TH AVE, SEATTLE, WA 98104(206) 860-5603(206) 720-7459 Get Directions Write a Review

NPPES record last updated: June 29, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

On this page

About Mr. Mark Lewis Anstadt Arnp NPPES

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

MR. MARK LEWIS ANSTADT ARNP (NPI 1144414145) is an individual nurse practitioner in Seattle, Washington, licensed in Washington (AP30007837) and active in the NPI registry since September 2007. He is enrolled in Medicare PECOS and is a graduate of University Of Washington School Of Medicine (2007).

NPPES Registry Identity

NPI1144414145

Entity TypeIndividualMale

Primary Taxonomy363L00000X

Provider Legal NameMR. MARK LEWIS ANSTADTCredential: ARNP

Location Address904 7TH AVESeattle, WA 98104

Mailing Address7600 Evergreen WayEverett, WA 98203-6421 · (206) 860-5414

Phone(206) 860-5603

Fax(206) 720-7459

Sole ProprietorNo

Medical School CMSUniversity Of Washington School Of MedicineGraduated 2007

Enumeration DateSeptember 1, 2007

Last NPPES UpdateJune 29, 2026

NPPES CertifiedJune 29, 2026

✔ NPI 1144414145 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363L00000X

License✔ Licensed in WA · AP30007837

Definition

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

904 7TH AVE, Seattle, WA 98104

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Accepted Insurance

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

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mr. Mark Lewis Anstadt Arnp 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 ID1557586583

PECOS Enrollment IDI20180516002019

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.

Areas of Expertise CMS Part B claims 16

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.

Blood test, lipids (cholesterol and triglycerides) 80061

A lipid panel is a blood test that measures fats and fatty substances, such as cholesterol and triglycerides. These substances are used by your body as a source of energy. High levels can lead to health issues, including heart disease.

173 services85 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

164 services81 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.

155 services90 patients

Measurement c-reactive protein for detection of infection or inflammation, high sensitivity 86141

The high sensitivity C-reactive protein test is a blood test that helps detect low levels of inflammation in the body. It's often used to assess the risk of heart disease but can also indicate infection or other inflammatory conditions.

154 services79 patients

Blood glucose (sugar) level 82947

A blood glucose level test measures the amount of sugar in your blood. It's often used to monitor and manage conditions like diabetes. High or low levels can indicate a health issue. The test is usually done by pricking your finger for a small blood sample.

133 services75 patients

Liver enzyme (sgpt), level 84460

A liver enzyme (SGPT) level test is a blood test that checks the health of your liver. SGPT is an enzyme found in your liver cells. If your liver is damaged or inflamed, SGPT can leak into your bloodstream, raising the enzyme level. This test helps identify liver diseases early.

51 services44 patients

Hemoglobin a1c level 83036

Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.

44 services34 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.

41 services34 patients

Uric acid level, blood 84550

A blood uric acid level test measures the amount of uric acid in your blood. Uric acid is a waste product that your body produces when it breaks down purines, substances found in your body and in certain foods. High levels may lead to gout or kidney stones.

36 services31 patients

Blood test, comprehensive group of blood chemicals 80053

A comprehensive group of blood chemicals test, also known as a comprehensive metabolic panel, is a blood test that measures your sugar level, electrolyte and fluid balance, kidney function, and liver function. This helps to check your body's overall health.

27 services24 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.

25 services23 patients

Liver enzyme (sgot), level 84450

A Liver Enzyme (SGOT) Level test is a simple blood test used to measure the amount of certain enzymes in your blood. These enzymes are normally found in liver cells. If the liver is damaged or diseased, these enzymes can leak into your bloodstream, indicating potential liver issues.

22 services21 patients

Blood creatinine level 82565

A blood creatinine level test measures the amount of creatinine in your blood. Creatinine is a waste product that your body produces when it uses energy. High levels may indicate that your kidneys aren't working properly. This test is often used to monitor kidney health.

19 services19 patients

Creatine kinase (cardiac enzyme) level, total 82550

The total Creatine Kinase (CK) level test is a blood test that helps assess the health of your heart. It measures an enzyme called CK that's released into the bloodstream when heart or other muscle tissue is damaged. High levels may indicate a heart attack or muscle disorder.

17 services14 patients

Blood test, thyroid stimulating hormone (tsh) 84443

A TSH blood test measures the level of thyroid stimulating hormone in your body. This hormone is produced by the pituitary gland and regulates how your thyroid works. It's a simple procedure where a small amount of blood is drawn from your arm for analysis.

13 services13 patients

Telephone, internet, or electronic health record assessment and management with written report by consulting physician, at least 5 minutes 99451

This service involves a consulting physician assessing your health condition via a phone or internet interaction. The doctor will spend at least 5 minutes discussing your health concerns. Afterwards, a written report summarizing the findings and recommendations will be provided for your reference.

11 services11 patients

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

$97.43 typical visit price

range $63.67 – $189.37

Typical copayment $24.35 (range $15.91 – $47.34)

Most-billed visit code 99203

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.

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.

LAURA MORRISON MD

Dermatology

904 7TH AVE
SEATTLE, WA 98104

King County (206) 860-4691

DR. JOSEPH W DAVIS M.D.

Internal Medicine

904 7TH AVE
SEATTLE, WA 98104

King County (206) 860-5574

MANDY WARNER MATTA PA-C

Physician Assistant (Surgical)

904 7TH AVE
SEATTLE, WA 98104

King County (206) 329-1760

ANTONIUS MULIA M.D.

Internal Medicine

904 7TH AVE
SEATTLE, WA 98104

King County (206) 329-1760

KATHLEEN MAKIELSKI M.D.

Otolaryngology

904 7TH AVE
SEATTLE, WA 98104

King County (206) 329-1760

DR. XIANGPING REN MD

Physical Medicine & Rehabilitation (Pain Medicine)

904 7TH AVE
SEATTLE, WA 98104

King County (206) 329-1760

ANNA H STEPCZYNSKI M.D.

Internal Medicine

904 7TH AVE
SEATTLE, WA 98104

King County (206) 860-5574

NEHA MITRAGOTRI

Pediatrics

904 7TH AVE
SEATTLE, WA 98104

King County (206) 292-2249

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 Mark Anstadt's NPI number?

The NPI number for Mark Anstadt is 1144414145. It was assigned to this individual provider in the NPPES registry on September 1, 2007.

Where is Mark Anstadt located?

Mark Anstadt practices at 904 7th Ave, Seattle, WA 98104. The listed phone number is (206) 860-5603.

What is Mark Anstadt's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Mark Anstadt enrolled in Medicare?

Yes. Mark Anstadt 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.

What insurance does Mark Anstadt accept?

Health plans from PacificSource Health Plans, Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Mark Anstadt 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.

When was this NPI record last updated?

The NPPES record for Mark Anstadt was last updated on June 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 52 days 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.