Arthritis Care Res (Hoboken)
Dr. Wambui Machua, MD
- Medicare services, 2024
- 1,496
- Medicare patients, 2024
- 106
- Part D claims, 2024
- 812
- Publications
- 5
- Clinical trials
- 6
- Practice address
- 1800 Howell Mill Road, Atlanta, GA 30318
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Piedmont Hospital, Inc - HOPD
Acute Care Hospital outpatient department · Atlanta, Georgia
Find Dr. Machua's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Wambui Machua is a rheumatologist in Atlanta, Georgia
Dr. Machua practices at Piedmont Hospital, Inc - HOPD in Atlanta, Georgia.
Dr. Machua's NPI, 1144541079, was assigned on June 15, 2010. Dr. Machua holds Georgia license 069892.
- NPI
- 1144541079NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3577871680
- NPI enumeration date
- June 15, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Wambui Machua practices at Piedmont Hospital, Inc - HOPD in Atlanta, Georgia
Dr. Machua's primary practice is Piedmont Hospital, Inc - HOPD, at 1800 Howell Mill Road, Atlanta, GA 30318.
- Piedmont Hospital, Inc - HOPD1800 Howell Mill Road, Atlanta, GA 30318
Source: Dmand AI Affiliation Data
Dr. Wambui Machua is affiliated with 5 sites of care and 1 medical group
Dr. Machua's primary practice is Piedmont Hospital, Inc - HOPD in Atlanta, Georgia. Dr. Machua is also affiliated with Piedmont Atlanta. The medical group on file is Piedmont Physicians Obstetrics and Gynecology of Jasper. Dmand AI also links Dr. Machua to 1 more hospital, 1 breast imaging center and 1 group practice or clinic, each named with a free account. Dr. Machua's employer is on file too: a hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Wambui Machua's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Machua practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Piedmont Hospital, Inc - HOPD | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Wambui Machua is one of 172 rheumatologists in Georgia
Rheumatology is Dr. Machua's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Machua is licensed in Georgia.
Specialties and state licenses
- Rheumatology, GeorgiaPrimary
Rheumatologists near Dr. Machua
Counts of rheumatologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Wambui Machua billed Medicare for 1,496 services in 2024
CMS data shows 1,496 Medicare services from Dr. Machua across 5 procedure codes in 2024, for 106 Medicare patients. Medicare paid $41,262 for them. Every service was in an office.
Dr. Machua's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 02024: 1,200
- Office and hospital visits
- 2023: 1882024: 1785%
- Surgery
- 2023: 1222024: 9820%
- Tests and treatments
- 2023: 02024: 20
Dr. Machua compared with the Georgia median for rheumatologists, 2024
- Dr. Machua
- Georgia median
- Medicare services
- 1,496vs 1,16728% above
- Medicare patients
- 106vs 21450% below
- Part D claims
- 675vs 1,26547% below
Medians across 169 rheumatologists in Georgia with Dmand AI profiles that report each measure.
Dr. Machua'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Wambui Machua treated 106 Medicare patients in 2024, average age 70
CMS counts 106 Medicare patients who saw Dr. Machua in 2024. The largest group is 65 to 74, with 37 patients. 75% of them have high blood pressure, and 71% have arthritis. 12% are also on Medicaid. Their average risk score is 1.67, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Machua's median patient age at 55, with 86% women.
Dr. Machua's Medicare patients by age, 2024
Dr. Machua's Medicare patients by sex, 2024
- Women9186%
- Men1514%
Chronic conditions among Dr. Machua's Medicare patients, 2024
- High blood pressure75%
- Arthritis71%
- High cholesterol67%
- Chronic kidney disease33%
- Anxiety27%
- Diabetes27%
- Ischemic heart disease25%
- Osteoporosis24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Machua's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 55
Patient panel by sex, all payers
- Women86%
- Men12%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Wambui Machua wrote 812 Medicare Part D claims in 2024
In 2024, Dr. Machua wrote 812 Medicare Part D claims for 177 patients. 80% of them were for generic drugs. CMS names the drug for 675 of them, across 15 drugs with 11 or more claims each, at $404,746 in total drug cost. In 2023, CMS named 548 claims across 12 drugs.
Dr. Machua's Part D claims by kind of drug, 2024
- Generic648 claims80%
- Brand-name and other164 claims20%
Dr. Machua'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: 5482024: 67523%
Drugs named by CMS: 15 in 2024, 12 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. Wambui Machua scored 92 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 92 out of 100 for Dr. Machua for performance year 2024, reported through an alternative payment model (APM). Dr. Machua accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Machua as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Machua's MIPS scores, performance year 2024
- 92of 100Final score
- 83.2of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Wambui Machua has 5 publications on record
Dmand AI links 5 papers to Dr. Machua, published from 2016 to 2024. The most frequent topics are Lupus Erythematosus, Systemic. Dr. Machua's most frequent co-authors are Alyce M. Oliver, MD, PhD, Anca D. Askanase, MD and Tundun Oreoluwa Babalola, MD.
Dr. Machua's papers by year, 2016 to 2024
Topics Dr. Machua writes about most
- Lupus Erythematosus, Systemic
Dr. Machua's most frequent co-authors
- Alyce M. Oliver, MD, PhD2 shared papers
- Anca D. Askanase, MD1 shared paper
- Tundun Oreoluwa Babalola, MD1 shared paper
Recent publications by Dr. Machua
Am J Case Rep
J Investig Med
J Clin Rheumatol
See who Dr. Machua researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Machua 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. Wambui Machua has worked on 6 clinical trials
Dmand AI links Dr. Machua to 6 clinical trials, 4 of them phase 3 studies. Conditions studied include Arthritis, Rheumatoid, Rheumatic Diseases and Lupus Erythematosus, Systemic. GlaxoSmithKline sponsors the most, 4. Open Payments lists research payments to Dr. Machua that name 1 trial.
Conditions in Dr. Machua's trials
- Arthritis, Rheumatoid
- Rheumatic Diseases
- Lupus Erythematosus, Systemic
- Connective Tissue Diseases
Investigators on the most trials with Dr. Machua
- Dhiman Basu, MD6 shared trials
- Benidecto Fernandez, MD5 shared trials
- Gurjit S. Kaeley, MD5 shared trials
Recent clinical trials with Dr. Machua
A Multi-centre Long-term Extension Study to Assess the Safety and Efficacy of GSK3196165 in the Treatment of Rheumatoid Arthritis (opens in a new tab)
A Study of Baricitinib in Participants With Systemic Lupus Erythematosus (SLE) (opens in a new tab)
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Wambui Machua received $27,882 in industry payments from 2016 to 2025
CMS Open Payments shows 509 general payments to Dr. Machua from 32 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 51% of the total. GlaxoSmithKline, LLC. paid the most, $7,058. It also lists 13 research payments totaling $1,948 from 2019 to 2020, naming 1 clinical trial.
General payments to Dr. Machua by program year, 2016 to 2025
General payments to Dr. Machua by kind, 2016 to 2025
- Food and beverage$14,34851%
- Consulting fees$8,62031%
- Travel and lodging$4,63017%
- Education$2841%
Companies that paid Dr. Machua the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Wambui Machua'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)Clinician Public Reporting: Overall MIPS Performance (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 |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| 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. Wambui Machua
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. Wambui Machua's NPI number?
Dr. Wambui Machua's NPI number is 1144541079. It was assigned on June 15, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Wambui Machua?
Dr. Wambui Machua is a rheumatologist in Atlanta, Georgia. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Wambui Machua practice?
Dr. Machua practices at 1800 Howell Mill Road, Atlanta, GA 30318. Dr. Machua's primary practice is Piedmont Hospital, Inc - HOPD in Atlanta, Georgia. Dmand AI also links Dr. Machua to 1 hospital, 1 breast imaging center and 1 group practice or clinic.
What is Dr. Wambui Machua's medical license number?
Dr. Machua holds Georgia license 069892.
Which hospitals is Dr. Wambui Machua affiliated with?
Dr. Machua is affiliated with Piedmont Atlanta. Dmand AI links Dr. Machua to 1 more hospital.
What medical group is Dr. Wambui Machua part of?
Dr. Machua is linked to Piedmont Physicians Obstetrics and Gynecology of Jasper.
Does Dr. Wambui Machua accept Medicare?
Yes. CMS data shows Dr. Machua billed Medicare for 1,496 services in 2024, and Dr. Machua accepts Medicare assignment.
Does Dr. Wambui Machua offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Machua as offering telehealth services.
What is Dr. Wambui Machua's MIPS score?
Dr. Machua's MIPS final score for performance year 2024 is 92 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Wambui Machua see?
CMS counts 106 Medicare patients who saw Dr. Machua in 2024, with an average age of 70.
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What services does Dr. Wambui Machua bill to Medicare?
In 2024, Dr. Machua's most billed Medicare services were injected or infused drug (J0897), office visit, established patient (99214) and surgery: heart and blood vessels (36415).
What drugs does Dr. Wambui Machua prescribe most?
In 2024 Medicare Part D data, Dr. Machua's most prescribed drugs by claims were Hydroxychloroquine Sulfate, Methotrexate and Prednisone.
Has Dr. Wambui Machua received payments from drug or device companies?
CMS Open Payments shows $27,882 in general payments to Dr. Machua from 32 companies from 2016 to 2025. The largest total came from GlaxoSmithKline, LLC.
How long has Dr. Wambui Machua been practicing?
Dr. Machua graduated from medical school in 2008, 18 years ago.
Does Dr. Wambui Machua do research?
Dmand AI links 5 publications to Dr. Machua, published from 2016 to 2024. Dr. Machua has worked on 6 clinical trials.
Who does Dr. Wambui Machua publish with?
Dr. Machua's most frequent co-authors are Alyce M. Oliver, MD, PhD (2 shared papers), Anca D. Askanase, MD (1 shared paper) and Tundun Oreoluwa Babalola, MD (1 shared paper).
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