DR. DOUGLAS HEMPEL M.D.
NPI 1164423844
Internal Medicine - Rheumatology in Waukesha, WI

Active since August 03, 2005PECOS EnrolledAccepts Medicare Assignment
20800 SWENSON DR STE 175, WAUKESHA, WI 53186(262) 785-0777(262) 785-0610 Get Directions Write a Review

NPPES record last updated: December 30, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Dec 30, 2025, Oct 31, 2019 (2 updates tracked since 2019).

About Dr. Douglas Hempel M.d. NPPES

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

DR. DOUGLAS HEMPEL M.D. (NPI 1164423844) is an individual rheumatology provider in Waukesha, Wisconsin, licensed in Wisconsin (42869) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, is affiliated with Waukesha Memorial Hospital, and is a graduate of Medical College Of Wisconsin (1998).

NPPES Registry Identity

NPI1164423844
Entity TypeIndividualMale
Primary Taxonomy207RR0500X
Provider Legal NameDR. DOUGLAS HEMPELCredential: M.D.
Location Address20800 SWENSON DR STE 175Waukesha, WI 53186-4000
Mailing Address20800 Swenson Dr Ste 175Waukesha, WI 53186-4000 · (262) 785-0777 · Fax (262) 785-0610
Fax(262) 785-0610
Sole ProprietorNo
Medical School CMSMedical College Of WisconsinGraduated 1998
Enumeration DateAugust 3, 2005
Last NPPES UpdateDecember 30, 20252 updates tracked since enumeration
NPPES CertifiedDecember 30, 2025
NPI 1164423844 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
License Licensed in WI · 42869
Definition

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.

20800 SWENSON DR STE 175, Waukesha, WI 53186

Other Identifiers 2

Medicaid32805700WI
OtherP00029278WI · Railroad Medicare

Accepted 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

Dr. Douglas Hempel 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 ID1355537002
PECOS Enrollment IDI20101122000156
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

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 647 times for 211 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 186 times for 56 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 1,418 times for 570 patients

Analysis of substance using immunoassay technique, multiple step method

This procedure involves the use of an immunoassay, a highly sensitive technique, to detect and measure substances in your body. It involves multiple steps and is commonly used in diagnosing and monitoring various health conditions.

This service was performed 41 times for 15 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 43 times for 31 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 21 times for 19 patients

Aspiration and/or injection of fluid from small joint

This procedure involves inserting a thin needle into a small joint to remove (aspirate) or inject fluid. It can help diagnose conditions, relieve discomfort, or administer medication directly into the joint. It's generally safe with minimal discomfort.

This service was performed 23 times for 16 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 138 times for 46 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 1,417 times for 570 patients

Calcium level, total

A total calcium level test measures the amount of calcium in your blood. Calcium is essential for body functions like bone formation, nerve signal transmission, and muscle contraction. Abnormal levels may indicate conditions like bone disease or kidney disorders.

This service was performed 58 times for 51 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 126 times for 42 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 1,420 times for 571 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 135 times for 74 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 70 times for 62 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 14 times for 14 patients

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

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 329 times for 189 patients

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

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 702 times for 306 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 312 times for 102 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 30 times for 30 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 37 times for 23 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 9,700 times for 33 patients

Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg

This injection contains two medications, betamethasone acetate and betamethasone sodium phosphate. It is used to reduce inflammation and pain. It's given by a healthcare professional, often directly into the area causing discomfort.

This service was performed 23 times for 16 patients

Injection, denosumab, 1 mg

Denosumab is a medication given via injection to strengthen your bones. It works by slowing down the cells that break down bone, improving bone density and reducing the risk of fractures. It's often used for osteoporosis treatment.

This service was performed 2,160 times for 22 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 50,547 times for 103 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 7,289 times for 41 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 2,400 times for 15 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 36,749 times for 18 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 255 times for 46 patients

Injection, zoledronic acid, 1 mg

Zoledronic acid is a medication given via injection to strengthen bones. It's often used in patients with osteoporosis or certain types of cancer. The injection helps reduce the risk of fractures and other bone complications.

This service was performed 73 times for 17 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 1,458 times for 582 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 1,419 times for 571 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 1,415 times for 570 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 1,104 times for 514 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 784 times for 91 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 182 times for 179 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 178 times for 77 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 109 times for 88 patients

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

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 78 times for 78 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 1,104 times for 515 patients

Rheumatoid factor level

The Rheumatoid Factor Level test is a blood test that helps detect the presence of Rheumatoid Factor (RF), a protein produced by your immune system. High RF levels often indicate autoimmune diseases like rheumatoid arthritis. The test involves a simple blood draw and lab analysis.

This service was performed 342 times for 174 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 166 times for 160 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 132 times for 130 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 79 times for 56 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. Douglas Hempel 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
OCONOMOWOC MEMORIAL HOSPITAL791 E SUMMIT AVE
OCONOMOWOC, WI 53066
(262) 569-9400Acute Care Hospitals

Other Providers at the Same Location


The following 7 providers are registered at the same or a nearby location.

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
Internal Medicine (Rheumatology)
20800 SWENSON DR STE 175
WAUKESHA, WI 53186
Non-Pharmacy Dispensing Site
20800 SWENSON DR STE 175
WAUKESHA, WI 53186
Nurse Practitioner (Adult Health)
20800 SWENSON DR STE 175
WAUKESHA, WI 53186
Physician Assistant
20800 SWENSON DR STE 175
WAUKESHA, WI 53186

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1164423844, enumerated as an "individual" on August 03, 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.

Douglas Hempel is affiliated with: WAUKESHA MEMORIAL HOSPITAL and OCONOMOWOC MEMORIAL HOSPITAL.