DR. MARK EDWARD PEARSON M.D.
NPI 1407857048
Internal Medicine - Rheumatology in Waukesha, WI

NPI Status: Active since August 04, 2005

Contact Information

20800 SWENSON DR STE 175
WAUKESHA, WI
ZIP 53186
Phone: (262) 785-0777
Fax: (262) 785-0610

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  • Individual
  • Male
  • Years of Experience 44
  • Internal Medicine
  • Rheumatology
  • Accepts Insurance
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About MARK PEARSON

This page provides the complete NPI Profile along with additional information for Mark Pearson, an internist established in Waukesha, Wisconsin with a medical specialization in Internal Medicine, focusing in rheumatology and more than 44 years of experience. He graduated from Medical College Of Wisconsin in 1982. The healthcare provider is registered in the NPI registry with number 1407857048 assigned on August 2005. The practitioner's primary taxonomy code is 207RR0500X with license number 28413 (WI). The provider is registered as an individual and his NPI record was last updated February 2026.

NPI
1407857048
Provider Name
DR. MARK EDWARD PEARSON M.D.
Gender
Male
Entity Type
Individual
Location Address
20800 SWENSON DR STE 175 WAUKESHA, WI 53186
Location Phone
(262) 785-0777
Location Fax
(262) 785-0610
Mailing Address
20800 SWENSON DR STE 175 WAUKESHA, WI 53186
Mailing Phone
(262) 785-0777
Mailing Fax
(262) 785-0610
Medical School Name
MEDICAL COLLEGE OF WISCONSIN
Graduation Year
1982
Is Sole Proprietor?
No
Enumeration Date
08-04-2005
Last Update Date
02-02-2026
Code Navigator

An internist like Mark Pearson is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.

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

Internal Medicine Rheumatology

Taxonomy Code
207RR0500X
Type
Allopathic & Osteopathic Physicians
License No.
28413
License State
WI
Taxonomy Description
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

  • Anthem Bronze Pathway/Lean 5000 (3 Free PCP Visits + $0 Select Drugs + Incentives) - HMO
  • Anthem Bronze Pathway/Lean HSA (+ Incentives) - HMO
  • Anthem Bronze Pathway/Lean Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) - HMO
  • Anthem Bronze Preferred/Broad 5000 (3 Free PCP Visits + $0 Select Drugs + Incentives) - POS
  • Anthem Bronze Preferred/Broad HSA (+ Incentives) - POS
  • Anthem Bronze Preferred/Broad Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) - POS
  • Anthem Gold Pathway/Lean 1000 ($0 Virtual PCP + $0 Select Drugs + Incentives) - HMO
  • Anthem Gold Pathway/Lean Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) - HMO
  • Anthem Gold Preferred/Broad 1000 ($0 Virtual PCP + $0 Select Drugs + Incentives) - POS
  • Anthem Gold Preferred/Broad Standard ($0 Virtual PCP + $0 Select Drugs + Incentives) - POS
  • CareSource (Common Ground Healthcare) Bronze $0 Ded / $2500 Rx Ded - EPO
  • CareSource (Common Ground Healthcare) Bronze $0 Ded / $2500 Rx Ded - Vision Exam - EPO
  • CareSource (Common Ground Healthcare) Bronze $9600 ($45 PCP Copay) - EPO
  • CareSource (Common Ground Healthcare) Bronze $9600 ($45 PCP Copay) - Vision Exam - EPO
  • CareSource (Common Ground Healthcare) Bronze Standard $7500 - EPO
  • CareSource (Common Ground Healthcare) Bronze Standard $7500 - Vision Exam - EPO
  • CareSource (Common Ground Healthcare) Gold $0 Ded - EPO
  • CareSource (Common Ground Healthcare) Gold $0 Ded - Vision Exam - EPO
  • CareSource (Common Ground Healthcare) Gold $3300 - EPO
  • CareSource (Common Ground Healthcare) Gold $3300 - Vision Exam - EPO
  • Prestige Bronze $0 Medical Deductible - HMO
  • Prestige Bronze $0 Medical Deductible + Dental + Vision - HMO
  • Prestige Bronze $0 Medical Deductible + Dental +Vision - HMO
  • Prestige Bronze Essential + 3 Free PCP Visits - HMO
  • Prestige Bronze Essential + Dental + Vision + 3 Free PCP Visits - HMO
  • Prestige Bronze Plus - HMO
  • Prestige Gold - HMO
  • Prestige Gold 50 + 1 Free PCP Visit - HMO
  • Prestige Gold 50 + Dental + Vision + 1 Free PCP Visit - HMO
  • Prestige Gold 50 + Dental + Vision+ 1 Free PCP Visit - HMO
  • UHC Bronze Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, No Referrals) - HMO
  • UHC Bronze Copay Focus+ $0 Indiv Med Ded ($0 Virtual Urgent Care, Dental + Vision, No Referrals) - HMO
  • UHC Bronze Essential ($0 Virtual Urgent Care, No Referrals) - HMO
  • UHC Bronze Standard (No Referrals) - HMO
  • UHC Gold Advantage ($0 Virtual Urgent Care, $5 Tier 2 Rx, No Referrals) - HMO
  • UHC Gold Advantage+ ($0 Virtual Urgent Care, $5 Tier 2 Rx, Dental + Vision, No Referrals) - HMO
  • UHC Gold Copay Focus $0 Indiv Med Ded ($0 Virtual Urgent Care, $5 Tier 2 Rx, No Referrals) - HMO
  • UHC Gold Standard (No Referrals) - HMO
  • UHC Silver Advantage ($0 Virtual Urgent Care, $5 Tier 2 Rx, No Referrals) - HMO
  • UHC Silver Advantage+ ($0 Virtual Urgent Care, $5 Tier 2 Rx, Dental + Vision, No Referrals) - HMO

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.

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
30809700MEDICAID (05)WI 
110036756OTHER (01)WIRAILROAD MEDICARE

Medicare Participation & PECOS Enrollment Status

Mark Pearson 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.

Mark Pearson 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: 5991830226

    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: I20100812000102

    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.

Administration of chemotherapy into vein, 1 hour or less

Chemotherapy is a treatment that uses drugs to destroy cancer cells. When administered into a vein, it's often through an IV. This procedure usually lasts 1 hour or less. You may feel a slight pinch as the needle is inserted, but it's generally painless.

This service was performed 140 times for 53 patients

Administration of chemotherapy into vein, each additional hour

Chemotherapy is a treatment method that uses drugs to destroy cancer cells. The drugs are administered into a vein, usually in the arm. Each additional hour of chemotherapy allows for more of the medication to enter your bloodstream to fight against the cancer cells.

This service was performed 129 times for 40 patients

Albumin (protein) level

The Albumin Level test measures the amount of albumin, a vital protein made by the liver, in your blood. This protein helps keep fluid in your bloodstream so it doesn't leak into other tissues. It's also vital for tissue growth and healing. Low or high levels can indicate certain health issues.

This service was performed 1,063 times for 361 patients

Aspiration and/or injection of fluid from large joint

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

This service was performed 19 times for 13 patients

Aspiration and/or injection of fluid from medium joint

This procedure involves a needle being inserted into a medium-sized joint, such as a knee or shoulder, to remove (aspirate) excess fluid. Sometimes, medication may also be injected into the joint to reduce inflammation and pain.

This service was performed 12 times for 12 patients

Beta 2 glycoprotein 1 antibody (autoantibody) measurement

The Beta 2 Glycoprotein 1 Antibody measurement is a blood test that helps detect certain autoantibodies. These autoantibodies can cause blood clots or pregnancy complications. The test aids in diagnosing conditions like antiphospholipid syndrome.

This service was performed 36 times for 12 patients

Blood creatinine level

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.

This service was performed 1,062 times for 360 patients

Cardiolipin antibody (tissue antibody) measurement

Cardiolipin antibody measurement is a blood test that checks for certain antibodies in your body. These antibodies might be present if you have an autoimmune disease, a condition where your body's immune system mistakenly attacks healthy cells. This test helps in diagnosing and managing such conditions.

This service was performed 36 times for 12 patients

Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count

A Complete Blood Cell Count is a common test that measures various components of the blood, including red cells (carry oxygen), white cells (fight infection), and platelets (help blood clot). An automated test ensures accuracy. The differential count provides detailed information about white cell types.

This service was performed 1,080 times for 371 patients

Complete ultrasound scan of joint

A complete ultrasound scan of a joint is a non-invasive procedure using sound waves to create images of your joint. It helps identify problems like inflammation, injury, or disease. It's painless, safe, and doesn't involve radiation.

This service was performed 107 times for 53 patients

Creatine kinase (cardiac enzyme) level, total

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.

This service was performed 59 times for 42 patients

Dxa bone density measurement of hip, pelvis, spine

A DXA bone density measurement is a simple, quick, and non-invasive procedure that assesses the strength of your bones. This test uses X-rays to measure the amount of minerals, mainly calcium, in the hip, pelvis, and spine. It helps in early detection of osteoporosis or other bone diseases.

This service was performed 16 times for 16 patients

Established patient office or other outpatient visit, 20-29 minutes

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.

This service was performed 106 times for 80 patients

Established patient office or other outpatient visit, 30-39 minutes

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.

This service was performed 551 times for 252 patients

Gammaglobulin (immune system protein) measurement

Gammaglobulin measurement is a blood test that checks the levels of certain proteins (gammaglobulins) that the body uses to fight infections. High or low levels can indicate various health conditions. It's a simple, quick procedure with minimal discomfort.

This service was performed 254 times for 84 patients

Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less

This is a procedure where a medical professional inserts a small tube into your vein to deliver medication, nutrients, or fluids directly into your bloodstream. This can be for treatment, prevention, or diagnosis. The process typically takes less than an hour.

This service was performed 329 times for 114 patients

Injection into tendon or ligament

An injection into a tendon or ligament involves placing medication directly into these areas to help reduce inflammation and pain. It's often used for conditions like arthritis or tendonitis. The procedure is quick and usually involves a local anesthetic.

This service was performed 18 times for 12 patients

Injection of drug or substance under skin or into muscle

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

This service was performed 44 times for 15 patients

Injection, abatacept, 10 mg (code may be used for medicare when drug administered under the direct supervision of a physician, not for use when drug is self administered)

Abatacept is a medication administered via injection under a doctor's supervision. It's used to treat conditions like rheumatoid arthritis by moderating the immune system. This code applies when the doctor administers the drug, not for self-administration.

This service was performed 6,625 times for 29 patients

Injection, golimumab, 1 mg, for intravenous use

Golimumab is a medication given through an IV (a small tube in your vein). It helps to reduce inflammation and pain by blocking a protein in your body that causes inflammation. It's often used to treat conditions like rheumatoid arthritis, psoriatic arthritis, and ankylosing spondylitis.

This service was performed 44,766 times for 85 patients

Injection, infliximab, excludes biosimilar, 10 mg

Infliximab is a medication given via injection to treat certain autoimmune conditions. It works by blocking the action of a substance in your body that causes inflammation. Each dose is based on your medical condition and response to treatment.

This service was performed 3,950 times for 29 patients

Injection, methylprednisolone sodium succinate, up to 125 mg

Methylprednisolone sodium succinate is a steroid medication injected into a muscle or vein. It helps reduce inflammation and immune response. It's used for various conditions like allergies, arthritis, breathing problems, or skin diseases. It's important to follow your doctor's instructions.

This service was performed 19 times for 11 patients

Injection, rituximab, 10 mg

Rituximab is a medication given via injection. It's used to treat certain types of cancer and autoimmune diseases. The 10 mg dosage refers to the amount of the drug in the injection. It works by targeting and destroying specific cells, helping your body's immune system.

This service was performed 1,900 times for 11 patients

Injection, tocilizumab, 1 mg

Tocilizumab is a medication administered via injection. It's used to treat certain conditions like rheumatoid arthritis by reducing inflammation in the body. It works by blocking a substance in the body that leads to inflammation.

This service was performed 24,200 times for 11 patients

Injection, triamcinolone acetonide, not otherwise specified, 10 mg

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

This service was performed 158 times for 26 patients

Insertion of needle into vein for collection of blood sample

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.

This service was performed 1,096 times for 374 patients

Liver enzyme (sgot), level

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.

This service was performed 1,063 times for 361 patients

Liver enzyme (sgpt), level

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.

This service was performed 1,063 times for 361 patients

Manual urinalysis test with examination using microscope, automated

A manual urinalysis test with automated microscopic examination is a lab process that checks your urine for health indicators. It involves a machine scanning your sample to identify any abnormal elements, which can assist in diagnosing various conditions.

This service was performed 38 times for 30 patients

Measurement c-reactive protein for detection of infection or inflammation

C-reactive protein (CRP) test is a blood test that checks for signs of inflammation or infection in the body. High levels of CRP often suggest that there's inflammation or a bacterial infection. This test helps in monitoring and managing conditions like arthritis and heart disease.

This service was performed 576 times for 321 patients

Measurement of antibody for assessment of autoimmune disorder, any method

This procedure measures the level of specific antibodies in your body to assess if you have an autoimmune disorder. Antibodies are proteins your immune system produces. In autoimmune disorders, these antibodies mistakenly attack your own cells. This test helps identify such conditions.

This service was performed 75 times for 32 patients

Measurement of antibody for rheumatoid arthritis assessment

This procedure measures the level of certain antibodies in your blood. These antibodies can be higher in people with rheumatoid arthritis, a condition causing joint inflammation. The test helps in diagnosing or monitoring the disease.

This service was performed 30 times for 30 patients

Measurement of complement (immune system proteins), antigen,

The measurement of complement (immune system proteins) and antigen is a blood test. It helps to assess how your immune system is functioning. Complement proteins play a role in your body's immune response, and antigens trigger this response. This test helps in diagnosing and monitoring certain diseases.

This service was performed 86 times for 35 patients

Measurement of dna antibody, native or double stranded

The measurement of DNA antibody, native or double stranded, is a blood test that helps detect autoimmune disorders, such as lupus. It identifies if your body is producing antibodies against its own DNA, which can indicate an overactive immune response.

This service was performed 38 times for 31 patients

New patient office or other outpatient visit, 45-59 minutes

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.

This service was performed 39 times for 39 patients

Red blood cell sedimentation rate, to detect inflammation, automated

The Red Blood Cell Sedimentation Rate is a test that helps detect inflammation in the body. It's automated, meaning a machine does the work. This test measures how fast red blood cells settle at the bottom of a tube in an hour. A faster rate may indicate inflammation.

This service was performed 319 times for 253 patients

Red blood cell sedimentation rate, to detect inflammation, non-automated

The Red Blood Cell Sedimentation Rate test measures how quickly red blood cells settle at the bottom of a test tube. If they settle faster than normal, it may indicate inflammation in the body. This test is non-automated, meaning it's manually performed by a lab technician.

This service was performed 254 times for 222 patients

Rheumatoid factor analysis

Rheumatoid factor analysis is a blood test utilized to help diagnose rheumatoid arthritis, an autoimmune disorder causing joint inflammation. It detects the presence of rheumatoid factor, an antibody often found in those with the condition.

This service was performed 29 times for 29 patients

Screening test for autoimmune disorder

A screening test for autoimmune disorders is a medical check-up that helps identify if your body's immune system is attacking its own cells. It involves a simple blood draw and analyzes various markers to detect potential issues. This test aids in early detection and effective treatment.

This service was performed 22 times for 22 patients

Tuberculosis test, enumeration of t-cells

A tuberculosis test checks if you've been exposed to TB, a lung disease. It's usually a skin test where a small amount of fluid is injected under your skin. Enumeration of T-cells is a blood test that counts your T-cells, crucial for immune response.

This service was performed 77 times for 77 patients

Uric acid level, blood

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.

This service was performed 35 times for 27 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $30.92 for a new patient copayment and $23.85 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 53186 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99204

  • Average New Patient Price $123.69
  • Minimum New Patient Price $53.9
  • Maximum New Patient Price $163.24
  • Average New Patient Copayment $30.92
  • Minimum New Patient Copayment $13.47
  • Maximum New Patient Copayment $40.81

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $95.41
  • Minimum Established Patient Price $17.4
  • Maximum Established Patient Price $133.76
  • Average Established Patient Copayment $23.85
  • Minimum Established Patient Copayment $4.35
  • Maximum Established Patient Copayment $33.44

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

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. Mark Pearson is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
WAUKESHA MEMORIAL HOSPITAL725 AMERICAN AVE
WAUKESHA, WI 53188
(262) 928-1000Acute Care Hospitals

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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 1407857048, we treat the final digit (8) 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 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).

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
4
Unchanged
Pos 3
0
Doubled → 0
Pos 4
7
Unchanged
Pos 5
8
Doubled → 16 → 1 + 6
Pos 6
5
Unchanged
Pos 7
7
Doubled → 14 → 1 + 4
Pos 8
0
Unchanged
Pos 9
4
Doubled → 8
Check
8
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 0 → 0 8 → 16 → 7 7 → 14 → 5 4 → 8

Step 2: Add all digits plus the NPI constant

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

2 + 4 + 0 + 7 + 1 + 6 + 5 + 1 + 4 + 0 + 8 + 24 = 62

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

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1407857048.

Other Providers at the Same Location


The following 4 providers are registered at the same or a nearby location.

Internal Medicine (Rheumatology)
20800 SWENSON DR STE 175
WAUKESHA, WI 53186
Nurse Practitioner (Adult Health)
20800 SWENSON DR STE 175
WAUKESHA, WI 53186
Internal Medicine (Rheumatology)
20800 SWENSON DR STE 175
WAUKESHA, WI 53186
Internal Medicine (Rheumatology)
20800 SWENSON DR STE 175
WAUKESHA, WI 53186

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1407857048, enumerated as an "individual" on August 04, 2005.

The provider is located at 20800 SWENSON DR STE 175 WAUKESHA, WI 53186 and the phone number is (262) 785-0777.

Internal Medicine with taxonomy code 207RR0500X and a focus in Rheumatology.

The provider might be accepting Accepts: Anthem Blue Cross and Blue Shield, CareSource. Please consult your insurance carrier or call the provider to verify.

Mark Pearson is affiliated with: WAUKESHA MEMORIAL HOSPITAL.