Arthritis, RheumatoidAtherosclerosisHeart Failure
Dr. Darcy Sittig Majka, MD
NPI1831206580PAC ID3173420437
- Medicare services, 2024
- 91,265
- Medicare patients, 2024
- 286
- Part D claims, 2024
- 1,647
- Publications
- 8
- Hospital affiliations
- 1
- Practice address
- 801 N Cass Ave Ste 300 Suite 300, Westmont, IL 60559
- Practice phone
- Call (630) 628-8889
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Duly Health And Care
Multi-specialty group site · Westmont, Illinois
Find Dr. Majka's professional email, personal email and mobile number
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Dr. Darcy Sittig Majka is a rheumatologist in Westmont, Illinois
Dr. Majka practices at Duly Health And Care in Westmont, Illinois.
Dr. Majka's NPI, 1831206580, was assigned on August 25, 2006. Dr. Majka holds Illinois license 036109116.
NPI and contact details
- NPI
- 1831206580NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3173420437
- NPI enumeration date
- August 25, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (630) 628-8889
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Darcy Sittig Majka practices at Duly Health and Care in Westmont, Illinois
Dr. Majka's primary practice is Duly Health and Care, at 801 N Cass Ave Ste 300 Suite 300, Westmont, IL 60559. The practice phone is (630) 628-8889.
- Duly Health and Care801 N Cass Ave Ste 300 Suite 300, Westmont, IL 60559Phone(630) 628-8889
Source: Dmand AI Affiliation Data
Dr. Darcy Sittig Majka is affiliated with 3 sites of care and 2 medical groups
Dr. Majka's primary practice is Duly Health And Care in Westmont, Illinois. Dr. Majka is also affiliated with Advocate Good Samaritan Hospital. The medical group on file is DuPage Medical Group. Dmand AI also links Dr. Majka to 1 more therapy and rehab clinic and 1 medical group, each named with a free account. Dr. Majka's employer is on file too: a physical therapy & rehab clinic.
Duly Health And CarePrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Darcy Sittig Majka's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Majka practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Duly Health And Care | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Darcy Sittig Majka is one of 285 rheumatologists in Illinois
Rheumatology is Dr. Majka's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Majka is licensed in Illinois.
Specialties and state licenses
- Rheumatology, IllinoisPrimary
Rheumatologists near Dr. Majka
Counts of rheumatologists with a Dmand AI profile, by place and practice. Each opens the list.
285rheumatologists in Illinois
4rheumatologists in Westmont
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Darcy Sittig Majka billed Medicare for 91,265 services in 2024
CMS data shows 91,265 Medicare services from Dr. Majka across 31 procedure codes in 2024, for 286 Medicare patients. Medicare paid $470,531 for them. Every service was in an office.
Medicare services, 202491,265
Medicare patients286
Paid by Medicare$470,531
Procedure codes31
Dr. Majka's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 66,5442024: 85,95129%
- Lab and pathology
- 2023: 3,0902024: 3,1321%
- Office and hospital visits
- 2023: 8512024: 8955%
- Surgery
- 2023: 6662024: 6721%
- Other services
- 2023: 02024: 342
- Tests and treatments
- 2023: 1912024: 27343%
Dr. Majka compared with the Illinois median for rheumatologists, 2024
- Dr. Majka
- Illinois median
- Medicare services
- 91,265vs 98792.5 times
- Medicare patients
- 286vs 2629% above
- Part D claims
- 1,548vs 1,07744% above
Medians across 290 rheumatologists in Illinois with Dmand AI profiles that report each measure.
Dr. Majka's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Majka and other rheumatologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Darcy Sittig Majka treated 286 Medicare patients in 2024, average age 75
CMS counts 286 Medicare patients who saw Dr. Majka in 2024. The largest group is 65 to 74, with 133 patients. 75% of them have arthritis, and 75% have high cholesterol. Their average risk score is 1.39, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Majka's median patient age at 68, with 72% women.
Medicare patients, 2024286
Average age75
Average risk score1.39
Dr. Majka's Medicare patients by age, 2024
Dr. Majka's Medicare patients by sex, 2024
- Women18765%
- Men9935%
Chronic conditions among Dr. Majka's Medicare patients, 2024
- Arthritis75%
- High cholesterol75%
- High blood pressure71%
- Ischemic heart disease28%
- Osteoporosis26%
- Chronic kidney disease24%
- Diabetes22%
- Anxiety19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Majka's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women72%
- Men27%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Darcy Sittig Majka wrote 1,647 Medicare Part D claims in 2024
In 2024, Dr. Majka wrote 1,647 Medicare Part D claims for 303 patients. 85% of them were for generic drugs. CMS names the drug for 1,548 of them, across 14 drugs with 11 or more claims each, at $657,257 in total drug cost. In 2023, CMS named 1,384 claims across 15 drugs.
Part D claims, 20241,647
Drugs named by CMS14
Total drug cost$657,257
Part D patients303
Dr. Majka's Part D claims by kind of drug, 2024
- Generic1,401 claims85%
- Brand-name and other246 claims15%
Dr. Majka's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,3842024: 1,54812%
Drugs named by CMS: 14 in 2024, 15 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Darcy Sittig Majka offers telehealth to Medicare patients
Dr. Majka accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Majka as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Darcy Sittig Majka has 8 publications on record
Dmand AI links 8 papers to Dr. Majka, published from 2014 to 2023. The most frequent topics are Arthritis, Rheumatoid, Atherosclerosis and Rheumatoid Factor. Dr. Majka's most frequent co-authors are Rowland W. Chang, MD, Stephen D. Persell, MD and William Hewitt Robinson, MD.
Papers8
Years published2014 to 2023
Dr. Majka's papers by year, 2014 to 2023
Topics Dr. Majka writes about most
- Arthritis, Rheumatoid
- Atherosclerosis
- Rheumatoid Factor
- Autoantibodies
- Antibodies, Antiphospholipid
- Autoimmunity
- Cardiovascular Diseases
- Coronary Artery Disease
Dr. Majka's most frequent co-authors
- Rowland W. Chang, MD3 shared papers
- Stephen D. Persell, MD2 shared papers
- William Hewitt Robinson, MD2 shared papers
Recent publications by Dr. Majka
Arthritis, RheumatoidCardiovascular DiseasesDecision Support Systems, Clinical
Arthritis, RheumatoidAutoantibodiesAutoimmunity
Rheum Dis Clin North Am
Antibodies, AntinuclearAntibodies, AntiphospholipidArthritis, Rheumatoid
See who Dr. Majka researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Majka works with, so you can find a warm path to the right rheumatologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Darcy Sittig Majka received $41,766 in industry payments from 2016 to 2022
CMS Open Payments shows 27 general payments to Dr. Majka from 8 drug and device companies from 2016 to 2022. Speaker and faculty fees make up the largest share, 90% of the total. Pfizer Inc. paid the most, $41,230.
General payments to Dr. Majka by program year, 2016 to 2022
General payments to Dr. Majka by kind, 2016 to 2022
$41.8Kin total
- Speaker and faculty fees$37,70490%
- Grants$3,5168%
- Food and beverage$3361%
- Consulting fees$2000%
- Education$100%
Companies that paid Dr. Majka the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Darcy Sittig Majka's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Darcy Sittig Majka
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Darcy Sittig Majka's NPI number?
Dr. Darcy Sittig Majka's NPI number is 1831206580. It was assigned on August 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Darcy Sittig Majka?
Dr. Darcy Sittig Majka is a rheumatologist in Westmont, Illinois. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Darcy Sittig Majka practice?
Dr. Majka practices at 801 N Cass Ave Ste 300 Suite 300, Westmont, IL 60559. Dr. Majka's primary practice is Duly Health And Care in Westmont, Illinois. Dmand AI also links Dr. Majka to 1 therapy and rehab clinic and 1 medical group.
What is Dr. Darcy Sittig Majka's office phone number?
The practice phone on file for Dr. Majka is (630) 628-8889.
What is Dr. Darcy Sittig Majka's medical license number?
Dr. Majka holds Illinois license 036109116.
Which hospitals is Dr. Darcy Sittig Majka affiliated with?
Dr. Majka is affiliated with Advocate Good Samaritan Hospital.
What medical group is Dr. Darcy Sittig Majka part of?
Dr. Majka is linked to DuPage Medical Group. Dmand AI links Dr. Majka to 1 more medical group.
Does Dr. Darcy Sittig Majka accept Medicare?
Yes. CMS data shows Dr. Majka billed Medicare for 91,265 services in 2024, and Dr. Majka accepts Medicare assignment.
Does Dr. Darcy Sittig Majka offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Majka as offering telehealth services.
How many Medicare patients does Dr. Darcy Sittig Majka see?
CMS counts 286 Medicare patients who saw Dr. Majka in 2024, with an average age of 75.
Show 6 more questionsShow fewer questions
What services does Dr. Darcy Sittig Majka bill to Medicare?
In 2024, Dr. Majka's most billed Medicare services were injected or infused drug (J0717), injected or infused drug (J0897) and surgery: heart and blood vessels (36415).
What drugs does Dr. Darcy Sittig Majka prescribe most?
In 2024 Medicare Part D data, Dr. Majka's most prescribed drugs by claims were Hydroxychloroquine Sulfate, Methotrexate and Prednisone.
Has Dr. Darcy Sittig Majka received payments from drug or device companies?
CMS Open Payments shows $41,766 in general payments to Dr. Majka from 8 companies from 2016 to 2022. The largest total came from Pfizer Inc.
How long has Dr. Darcy Sittig Majka been practicing?
Dr. Majka graduated from medical school in 1997, 29 years ago.
Does Dr. Darcy Sittig Majka do research?
Dmand AI links 8 publications to Dr. Majka, published from 2014 to 2023.
Who does Dr. Darcy Sittig Majka publish with?
Dr. Majka's most frequent co-authors are Rowland W. Chang, MD (3 shared papers), Stephen D. Persell, MD (2 shared papers) and William Hewitt Robinson, MD (2 shared papers).
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