Dr. John E. Croghan, MD
- Medicare services, 2024
- 4,566
- Medicare patients, 2024
- 193
- Part D claims, 2024
- 3,758
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 2650 Ridge Ave, Evanston, IL 60201
- Practice phone
- Call (847) 570-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Croghan's professional email, personal email and mobile number
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Dr. John E. Croghan is an internist in Evanston, Illinois
Dr. Croghan practices at Evanston Hospital in Evanston, Illinois, part of Endeavor Health.
Dr. Croghan's NPI, 1790724060, was assigned on June 5, 2006. Dr. Croghan graduated from Rush Medical College of Rush University in 1986. Dr. Croghan holds Illinois license 036076821.
- NPI
- 1790724060NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7315840246
- NPI enumeration date
- June 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (847) 570-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John E. Croghan practices at Evanston Hospital in Evanston, Illinois
Dr. Croghan's primary practice is Evanston Hospital, at 2650 Ridge Ave, Evanston, IL 60201 in Cook County. The practice phone is (847) 570-2000.
- Evanston Hospital2650 Ridge Ave, Evanston, IL 60201 · Cook CountyPhone(847) 570-2000
Source: Dmand AI Affiliation Data
Dr. John E. Croghan is affiliated with 8 sites of care and 5 medical groups
Dr. Croghan's primary practice is Evanston Hospital in Evanston, Illinois, part of Endeavor Health. The medical group on file is Dedication Health. Dmand AI also links Dr. Croghan to 5 more group practices and clinics, 4 medical groups, 1 home health agency and 1 skilled nursing facility, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John E. Croghan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Croghan practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Evanston Hospital | Available with a free account |
| +7 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John E. Croghan is one of 5,652 internists in Illinois
Internal medicine is Dr. Croghan's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Croghan is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Croghan
Counts of internists 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. John E. Croghan billed Medicare for 4,566 services in 2024
CMS data shows 4,566 Medicare services from Dr. Croghan across 16 procedure codes in 2024, for 193 Medicare patients. Medicare paid $177,295 for them. Every service was in an office.
Dr. Croghan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 1,4382024: 2,26858%
- Office and hospital visits
- 2023: 1,1372024: 1,39122%
- Tests and treatments
- 2023: 3542024: 354No change
- Surgery
- 2023: 2522024: 2551%
- Other services
- 2023: 2492024: 2365%
- Imaging
- 2023: 572024: 629%
Dr. Croghan compared with the Illinois median for internists, 2024
- Dr. Croghan
- Illinois median
- Medicare services
- 4,566vs 5668.1 times
- Medicare patients
- 193vs 2087% below
- Part D claims
- 3,264vs 28411.5 times
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Croghan'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. Croghan?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Croghan and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John E. Croghan treated 193 Medicare patients in 2024, average age 79
CMS counts 193 Medicare patients who saw Dr. Croghan in 2024. The largest group is 65 to 74, with 72 patients. 75% of them have high cholesterol, and 55% have high blood pressure. Their average risk score is 1.02, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Croghan's median patient age at 74, with 50% women.
Dr. Croghan's Medicare patients by age, 2024
Dr. Croghan's Medicare patients by sex, 2024
- Women10253%
- Men9147%
Chronic conditions among Dr. Croghan's Medicare patients, 2024
- High cholesterol75%
- High blood pressure55%
- Arthritis54%
- Osteoporosis31%
- Ischemic heart disease30%
- Anxiety27%
- Mood disorders18%
- Atrial fibrillation16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Croghan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John E. Croghan wrote 3,758 Medicare Part D claims in 2024
In 2024, Dr. Croghan wrote 3,758 Medicare Part D claims for 178 patients. 87% of them were for generic drugs. CMS names the drug for 3,264 of them, across 76 drugs with 11 or more claims each, at $347,777 in total drug cost. In 2023, CMS named 3,281 claims across 73 drugs.
Dr. Croghan's Part D claims by kind of drug, 2024
- Generic3,278 claims87%
- Brand-name464 claims12%
- Other16 claims0%
Dr. Croghan'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. Croghan's Part D claims, 2024
- Opioids1%45 of 3,758 claims
- Antibiotics4%164 of 3,758 claims
- Antipsychotics, patients 65 and over0%14 of 3,758 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: 3,2812024: 3,2641%
Drugs named by CMS: 76 in 2024, 73 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. John E. Croghan offers telehealth to Medicare patients
Dr. Croghan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Croghan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John E. Croghan has 1 publication on record
Dmand AI links 1 paper to Dr. Croghan in 2012.
Recent publications by Dr. Croghan
See who Dr. Croghan researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Croghan works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John E. Croghan received $53 in industry payments from 2016 to 2022
CMS Open Payments shows 3 general payments to Dr. Croghan from 3 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $24.
General payments to Dr. Croghan by program year, 2016 to 2022
Companies that paid Dr. Croghan the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John E. Croghan graduated from Rush Medical College of Rush University
Dr. Croghan graduated from Rush Medical College of Rush University in 1986.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John E. Croghan'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) |
| 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) |
| 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. John E. Croghan
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. John E. Croghan's NPI number?
Dr. John E. Croghan's NPI number is 1790724060. It was assigned on June 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John E. Croghan?
Dr. John E. Croghan is an internist in Evanston, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John E. Croghan practice?
Dr. Croghan practices at 2650 Ridge Ave, Evanston, IL 60201. Dr. Croghan's primary practice is Evanston Hospital in Evanston, Illinois, part of Endeavor Health. Dmand AI also links Dr. Croghan to 5 group practices and clinics, 4 medical groups, 1 home health agency and 1 skilled nursing facility.
What is Dr. John E. Croghan's office phone number?
The practice phone on file for Dr. Croghan is (847) 570-2000.
What is Dr. John E. Croghan's medical license number?
Dr. Croghan holds Illinois license 036076821.
Which hospitals is Dr. John E. Croghan affiliated with?
Dr. Croghan practices at Evanston Hospital in Evanston, Illinois.
What medical group is Dr. John E. Croghan part of?
Dr. Croghan is linked to Dedication Health. Dmand AI links Dr. Croghan to 4 more medical groups.
Does Dr. John E. Croghan accept Medicare?
Yes. CMS data shows Dr. Croghan billed Medicare for 4,566 services in 2024, and Dr. Croghan accepts Medicare assignment.
Does Dr. John E. Croghan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Croghan as offering telehealth services.
How many Medicare patients does Dr. John E. Croghan see?
CMS counts 193 Medicare patients who saw Dr. Croghan in 2024, with an average age of 79.
Show 6 more questionsShow fewer questions
What services does Dr. John E. Croghan bill to Medicare?
In 2024, Dr. Croghan's most billed Medicare services were injected or infused drug (J0897), office visit, established patient (99213) and surgery: heart and blood vessels (36415).
Where did Dr. John E. Croghan go to medical school?
Dr. Croghan graduated from Rush Medical College of Rush University in 1986.
What drugs does Dr. John E. Croghan prescribe most?
In 2024 Medicare Part D data, Dr. Croghan's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Amlodipine Besylate.
Has Dr. John E. Croghan received payments from drug or device companies?
CMS Open Payments shows $53 in general payments to Dr. Croghan from 3 companies from 2016 to 2022. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. John E. Croghan been practicing?
Dr. Croghan graduated from medical school in 1986, 40 years ago.
Does Dr. John E. Croghan do research?
Dmand AI links 1 publication to Dr. Croghan.
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