JAMA Netw Open
Artificial IntelligenceDocumentationPneumothorax
Dr. Ajay Rama Chapa, MD
NPI1689896441PAC ID3971668377
- Medicare services, 2024
- 3,339
- Medicare patients, 2024
- 2,049
- Publications
- 2
- MIPS score, 2024
- 95
- Hospital affiliations
- 2
- Practice address
- 251 E Huron St, Chicago, IL 60611
- Practice phone
- Call (312) 926-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chapa'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. Ajay Rama Chapa is a diagnostic radiologist in Chicago, Illinois
Dr. Chapa practices at Northwestern Memorial Hospital in Chicago, Illinois, part of Northwestern Memorial HealthCare.
Dr. Chapa's NPI, 1689896441, was assigned on May 2, 2007. Dr. Chapa graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2006. Dr. Chapa holds Illinois license 036127186.
NPI and contact details
- NPI
- 1689896441NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3971668377
- NPI enumeration date
- May 2, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (312) 926-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ajay Rama Chapa practices at Northwestern Memorial Hospital in Chicago, Illinois
Dr. Chapa's primary practice is Northwestern Memorial Hospital, at 251 E Huron St, Chicago, IL 60611 in Cook County. The practice phone is (312) 926-2000.
- Northwestern Memorial Hospital251 E Huron St, Chicago, IL 60611 · Cook CountyPhone(312) 926-2000
Source: Dmand AI Affiliation Data
Dr. Ajay Rama Chapa is affiliated with 3 sites of care and 1 medical group
Dr. Chapa's primary practice is Northwestern Memorial Hospital in Chicago, Illinois, part of Northwestern Memorial HealthCare. Dr. Chapa is also affiliated with Northwestern Medicine Central DuPage Hospital. The medical group on file is Northwestern Medical Faculty Foundation. Dmand AI also links Dr. Chapa to 1 more group practice or clinic, named with a free account.
Northwestern Medicine Central DuPage HospitalNorthwestern Medical Faculty Foundation1 group practice or clinicName with a free account
See all 4 affiliations for Dr. ChapaSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ajay Rama Chapa's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chapa practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Memorial Hospital | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Chapa practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across Northwestern Memorial HealthCare and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Ajay Rama Chapa is one of 1,336 diagnostic radiologists in Illinois
Diagnostic radiology is Dr. Chapa's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dmand AI has Dr. Chapa's licenses on file in 2 states: Illinois and Missouri.
Specialties and state licenses
- Diagnostic radiology, IllinoisPrimary
- Missouri license
Diagnostic radiologists near Dr. Chapa
Counts of diagnostic radiologists with a Dmand AI profile, by place and practice. Each opens the list.
1,336diagnostic radiologists in Illinois340diagnostic radiologists in Chicago61diagnostic radiologists at Northwestern Memorial Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Ajay Rama Chapa billed Medicare for 3,339 services in 2024
CMS data shows 3,339 Medicare services from Dr. Chapa across 45 procedure codes in 2024, for 2,049 Medicare patients. Medicare paid $51,459 for them.
Medicare services, 20243,339
Medicare patients2,049
Paid by Medicare$51,459
Procedure codes45
Dr. Chapa's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 1,6682024: 2,00620%
- Surgery
- 2023: 762024: 402429%
- Drugs given in the office
- 2023: 6242024: 40036%
- Lab and pathology
- 2023: 332024: 356979%
- Other services
- 2023: 1562024: 17512%
Where Dr. Chapa's Medicare services took place, 2024
- In an office1,79754%
- In a facility1,54246%
Dr. Chapa compared with the Illinois median for diagnostic radiologists, 2024
- Dr. Chapa
- Illinois median
- Medicare services
- 3,339vs 2,57530% above
- Medicare patients
- 2,049vs 1,83612% above
Medians across 1,261 diagnostic radiologists in Illinois with Dmand AI profiles that report each measure.
Dr. Chapa'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.
Need commercial claims for Dr. Chapa?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chapa and other diagnostic radiologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ajay Rama Chapa treated 2,049 Medicare patients in 2024, average age 73
CMS counts 2,049 Medicare patients who saw Dr. Chapa in 2024. The largest group is 65 to 74, with 946 patients. 75% of them have high cholesterol, and 70% have high blood pressure. 17% are also on Medicaid. Their average risk score is 1.59, 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. Chapa's median patient age at 60, with 53% women.
Medicare patients, 20242,049
Average age73
Average risk score1.59
Also on Medicaid17%
Dr. Chapa's Medicare patients by age, 2024
Dr. Chapa's Medicare patients by sex, 2024
- Women1,26662%
- Men78338%
Chronic conditions among Dr. Chapa's Medicare patients, 2024
- High cholesterol75%
- High blood pressure70%
- Arthritis65%
- Ischemic heart disease32%
- Diabetes29%
- Anxiety28%
- Mood disorders27%
- Chronic kidney disease25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chapa's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women53%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ajay Rama Chapa scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Chapa for performance year 2024, reported through an alternative payment model (APM). Dr. Chapa accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Chapa's MIPS scores, performance year 2024
- 95of 100Final score
- 83of 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
For MedTech and pharma teams
Find diagnostic radiologists like Dr. Chapa by procedure volume and prescribing
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Ajay Rama Chapa has 2 publications on record
Dmand AI links 2 papers to Dr. Chapa, published from 2022 to 2025. Dr. Chapa's most frequent co-authors are Samir F. Abboud, MD, Borislav A. Alexiev, MD and Mozziyar Etemadi, MD, PhD.
Papers2
Years published2022 to 2025
Dr. Chapa's most frequent co-authors
- Samir F. Abboud, MD1 shared paper
- Borislav A. Alexiev, MD1 shared paper
- Mozziyar Etemadi, MD, PhD1 shared paper
Recent publications by Dr. Chapa
Pathol Res Pract
Biopsy, Large-Core NeedleGiant Cell TumorsOptical Imaging
See who Dr. Chapa researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chapa works with, so you can find a warm path to the right diagnostic radiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Ajay Rama Chapa received $214 in industry payments from 2018 to 2023
CMS Open Payments shows 3 general payments to Dr. Chapa from 3 drug and device companies from 2018 to 2023. Food and beverage make up the largest share, 100% of the total. Siemens Medical Solutions USA, Inc. paid the most, $126.
General payments to Dr. Chapa by program year, 2018 to 2023
Companies that paid Dr. Chapa the most, 2018 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ajay Rama Chapa graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Chapa graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2006.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Ajay Rama Chapa'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 DataDmand AI Org Hierarchy 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) |
| 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 |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Ajay Rama Chapa
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. Ajay Rama Chapa's NPI number?
Dr. Ajay Rama Chapa's NPI number is 1689896441. It was assigned on May 2, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Ajay Rama Chapa?
Dr. Ajay Rama Chapa is a diagnostic radiologist in Chicago, Illinois. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Dr. Ajay Rama Chapa practice?
Dr. Chapa practices at 251 E Huron St, Chicago, IL 60611. Dr. Chapa's primary practice is Northwestern Memorial Hospital in Chicago, Illinois, part of Northwestern Memorial HealthCare. Dmand AI also links Dr. Chapa to 1 group practice or clinic.
What is Dr. Ajay Rama Chapa's office phone number?
The practice phone on file for Dr. Chapa is (312) 926-2000.
What is Dr. Ajay Rama Chapa's medical license number?
Dr. Chapa holds Illinois license 036127186, one of the licenses on file in 2 states.
Which states has Dr. Ajay Rama Chapa been licensed in?
Dmand AI has state licenses on file for Dr. Chapa in Illinois and Missouri.
Which hospitals is Dr. Ajay Rama Chapa affiliated with?
Dr. Chapa practices at Northwestern Memorial Hospital in Chicago, Illinois. Dr. Chapa is also affiliated with Northwestern Medicine Central DuPage Hospital.
What medical group is Dr. Ajay Rama Chapa part of?
Dr. Chapa is linked to Northwestern Medical Faculty Foundation.
Does Dr. Ajay Rama Chapa accept Medicare?
Yes. CMS data shows Dr. Chapa billed Medicare for 3,339 services in 2024, and Dr. Chapa accepts Medicare assignment.
What is Dr. Ajay Rama Chapa's MIPS score?
Dr. Chapa's MIPS final score for performance year 2024 is 95 out of 100, reported through an alternative payment model (APM).
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. Ajay Rama Chapa see?
CMS counts 2,049 Medicare patients who saw Dr. Chapa in 2024, with an average age of 73.
What services does Dr. Ajay Rama Chapa bill to Medicare?
In 2024, Dr. Chapa's most billed Medicare services were lab and pathology test (82565), surgery: heart and blood vessels (36415) and injected or infused drug (J1100).
Where did Dr. Ajay Rama Chapa go to medical school?
Dr. Chapa graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2006.
Has Dr. Ajay Rama Chapa received payments from drug or device companies?
CMS Open Payments shows $214 in general payments to Dr. Chapa from 3 companies from 2018 to 2023. The largest total came from Siemens Medical Solutions USA, Inc.
How long has Dr. Ajay Rama Chapa been practicing?
Dr. Chapa graduated from medical school in 2006, 20 years ago.
Does Dr. Ajay Rama Chapa do research?
Dmand AI links 2 publications to Dr. Chapa, published from 2022 to 2025.
Who does Dr. Ajay Rama Chapa publish with?
Dr. Chapa's most frequent co-authors are Samir F. Abboud, MD (1 shared paper), Borislav A. Alexiev, MD (1 shared paper) and Mozziyar Etemadi, MD, PhD (1 shared paper).
Selling to diagnostic radiology practices?
See diagnostic radiologists in Illinois by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card