Dr. Maher Ajam, MD
- Medicare services, 2024
- 2,208
- Medicare patients, 2024
- 573
- Part D claims, 2024
- 2,158
- Publications
- 1
- Hospital affiliations
- 7
- Practice address
- 120 W 22nd St, Oak Brook, IL 60523
- Practice phone
- Call (219) 764-0564
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Portage Dialysis
Oak Brook, Illinois
Find Dr. Ajam'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. Maher Ajam is a nephrologist in Oak Brook, Illinois
Dr. Ajam practices at Portage Dialysis in Oak Brook, Illinois.
Dr. Ajam's NPI, 1548265135, was assigned on June 20, 2005. Dr. Ajam graduated from University of Aleppo Faculty of Medicine in 1978. Dr. Ajam's Indiana license number on file is 01035956A.
- NPI
- 1548265135NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1850203811
- NPI enumeration date
- June 20, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (219) 764-0564
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Maher Ajam practices at Portage Dialysis in Oak Brook, Illinois
Dr. Ajam's primary practice is Portage Dialysis, at 120 W 22nd St, Oak Brook, IL 60523 in Dupage County. The practice phone is (219) 764-0564.
- Portage Dialysis120 W 22nd St, Oak Brook, IL 60523 · Dupage CountyPhone(219) 764-0564
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Maher Ajam is affiliated with 14 sites of care and 1 medical group
Dr. Ajam's primary practice is Portage Dialysis in Oak Brook, Illinois. Dr. Ajam is also affiliated with St. Mary Medical Center. The medical group on file is Nephrology Specialists, P.C. Dmand AI also links Dr. Ajam to 6 more hospitals, 4 dialysis centers, 1 physician office and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Maher Ajam's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ajam practices, 13 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Portage Dialysis | Available with a free account |
| +13 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Maher Ajam is one of 534 nephrologists in Illinois
Nephrology is Dr. Ajam's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Ajam is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Ajam's licenses on file in 2 states: Indiana and Illinois.
Specialties and state licenses
- Nephrology, IndianaPrimary
- Illinois license
Clinical focus
Dmand AI lists chronic anemia, chronic kidney disease, fluid and electrolyte imbalances and parathyroid gland disorder among the conditions Dr. Ajam treats.
Nephrologists near Dr. Ajam
Counts of nephrologists 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. Maher Ajam billed Medicare for 2,208 services in 2024
CMS data shows 2,208 Medicare services from Dr. Ajam across 11 procedure codes in 2024, for 573 Medicare patients. Medicare paid $218,908 for them.
Dr. Ajam's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,8342024: 1,837No change
- Tests and treatments
- 2023: 5872024: 37137%
Where Dr. Ajam's Medicare services took place, 2024
- In an office76134%
- In a facility1,44766%
Dr. Ajam compared with the Illinois median for nephrologists, 2024
- Dr. Ajam
- Illinois median
- Medicare services
- 2,208vs 1,28472% above
- Medicare patients
- 573vs 35761% above
- Part D claims
- 1,898vs 5783.3 times
Medians across 526 nephrologists in Illinois with Dmand AI profiles that report each measure.
Dr. Ajam'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. Ajam?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ajam and other nephrologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Maher Ajam treated 573 Medicare patients in 2024, average age 75
CMS counts 573 Medicare patients who saw Dr. Ajam in 2024. The largest group is 75 to 84, with 206 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 28% are also on Medicaid. Their average risk score is 3.60, 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. Ajam's median patient age at 73, with 43% women.
Dr. Ajam's Medicare patients by age, 2024
Dr. Ajam's Medicare patients by sex, 2024
- Women27949%
- Men29451%
Chronic conditions among Dr. Ajam's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Diabetes56%
- Heart failure56%
- Ischemic heart disease53%
- Mood disorders43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ajam's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women43%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Maher Ajam wrote 2,158 Medicare Part D claims in 2024
In 2024, Dr. Ajam wrote 2,158 Medicare Part D claims for 265 patients. 85% of them were for generic drugs. CMS names the drug for 1,898 of them, across 49 drugs with 11 or more claims each, at $212,346 in total drug cost. In 2023, CMS named 1,805 claims across 45 drugs.
Dr. Ajam's Part D claims by kind of drug, 2024
- Generic1,834 claims85%
- Brand-name and other324 claims15%
Dr. Ajam'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.
Drug classes CMS tracks in Dr. Ajam's Part D claims, 2024
- Antibiotics4%76 of 2,158 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,8052024: 1,8985%
Drugs named by CMS: 49 in 2024, 45 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
How Dr. Maher Ajam takes part in Medicare
Dr. Ajam accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Maher Ajam has 1 publication on record
Dmand AI links 1 paper to Dr. Ajam.
Recent publications by Dr. Ajam
See who Dr. Ajam researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ajam works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Maher Ajam received $3,655 in industry payments from 2016 to 2025
CMS Open Payments shows 194 general payments to Dr. Ajam from 30 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 95% of the total. AstraZeneca Pharmaceuticals LP paid the most, $672.
General payments to Dr. Ajam by program year, 2016 to 2025
General payments to Dr. Ajam by kind, 2016 to 2025
- Food and beverage$3,46695%
- Education$1895%
Companies that paid Dr. Ajam the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Maher Ajam has 1 award and honors on record
Dmand AI lists 1 award for Dr. Ajam, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Ajam
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Maher Ajam graduated from University of Aleppo Faculty of Medicine
Dr. Ajam graduated from University of Aleppo Faculty of Medicine in 1978.
- Medical school
- Board certified in internal medicine
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. Maher Ajam accepts plans from 15 insurance carriers
Dr. Ajam is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Elevance
- United Healthcare
- HCSC
- Aspirus Health Plan
- Blue Cross Blue Shield of Massachusetts
- Humana
- +7 more carriersWith a free account
Plan types Dr. Ajam accepts, by number of carriers
- PPO10
- Medicare8
- HMO7
- POS5
- EPO4
Source: Dmand AI Insurance Network Data
Sources for Dr. Maher Ajam'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Maher Ajam
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. Maher Ajam's NPI number?
Dr. Maher Ajam's NPI number is 1548265135. It was assigned on June 20, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Maher Ajam?
Dr. Maher Ajam is a nephrologist in Oak Brook, Illinois. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Maher Ajam practice?
Dr. Ajam practices at 120 W 22nd St, Oak Brook, IL 60523. Dr. Ajam's primary practice is Portage Dialysis in Oak Brook, Illinois. Dmand AI also links Dr. Ajam to 6 hospitals, 4 dialysis centers, 1 physician office and 1 group practice or clinic.
What is Dr. Maher Ajam's office phone number?
The practice phone on file for Dr. Ajam is (219) 764-0564.
What is Dr. Maher Ajam's medical license number?
Dr. Ajam's Indiana license number on file is 01035956A, one of the licenses on file in 2 states.
Which states has Dr. Maher Ajam been licensed in?
Dmand AI has state licenses on file for Dr. Ajam in Indiana (1987 to 2025) and Illinois (1983 to 1990).
Which hospitals is Dr. Maher Ajam affiliated with?
Dr. Ajam is affiliated with St. Mary Medical Center. Dmand AI links Dr. Ajam to 6 more hospitals.
What medical group is Dr. Maher Ajam part of?
Dr. Ajam is linked to Nephrology Specialists, P.C.
Does Dr. Maher Ajam accept Medicare?
Yes. CMS data shows Dr. Ajam billed Medicare for 2,208 services in 2024, and Dr. Ajam accepts Medicare assignment.
How many Medicare patients does Dr. Maher Ajam see?
CMS counts 573 Medicare patients who saw Dr. Ajam in 2024, with an average age of 75.
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Is Dr. Maher Ajam board certified?
Yes. Dr. Ajam is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Maher Ajam bill to Medicare?
In 2024, Dr. Ajam's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and dialysis (90960).
Where did Dr. Maher Ajam go to medical school?
Dr. Ajam graduated from University of Aleppo Faculty of Medicine in 1978.
What drugs does Dr. Maher Ajam prescribe most?
In 2024 Medicare Part D data, Dr. Ajam's most prescribed drugs by claims were Amlodipine Besylate, Atorvastatin Calcium and Carvedilol.
Has Dr. Maher Ajam received payments from drug or device companies?
CMS Open Payments shows $3,655 in general payments to Dr. Ajam from 30 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Maher Ajam been practicing?
Dr. Ajam graduated from medical school in 1978, 48 years ago.
Does Dr. Maher Ajam do research?
Dmand AI links 1 publication to Dr. Ajam.
What insurance does Dr. Maher Ajam accept?
Dr. Ajam is in network with 15 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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