Physician Profile
Unclaimed ProfileAbout CROGHAN
John Croghan, M.D. practises internal medicine in Winnetka, IL. John is a 1986 graduate of Rush Medical College of Rush University. According to Medicare claims data, John cared for 1,097 Medicare patients across 4,566 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What is Dr. Croghan's specialty?
Dr. Croghan is an internal medicine in Winnetka, IL. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where can I find Dr. Croghan?
Dr. Croghan is listed at 710 OAK ST, Winnetka, IL 60093. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Croghan?
The number on file is (847) 840-1470. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Croghan's NPI number?
Dr. Croghan's National Provider Identifier is 1790724060. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Dr. Croghan's medical education?
Dr. Croghan attended Rush Medical College of Rush University, graduating in 1986. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Croghan been practising?
Dr. Croghan has 40 years experience. Calculated from a graduation year of 1986, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Croghan known for?
According to Medicare billing data, Dr. Croghan performs procedures including insertion of needle into vein for collection of blood sample; reads or performs imaging such as ct scan of chest without contrast and x-ray of chest, 2 views; provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report and injection of drug or substance under skin or into muscle, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Croghan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Croghan. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (847) 840-1470
- Email not available
Practice Locations
710 OAK ST
Winnetka, IL 60093
Procedures Most Often Billed to Medicare
4,566 services · 1,097 patients · 16 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
255 |
| Ct scan of chest without contrast | Imaging | 71250 |
26 |
| X-ray of chest, 2 views | Imaging | 71046 |
24 |
| Ct scan of lower spine without contrast | Imaging | 72131 |
12 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
154 |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
79 |
| Influenza vaccine, inactivated | Treatment | 90653 |
76 |
| Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use | Treatment | 90677 |
45 |
| Injection, denosumab, 1 mg | Drug given | J0897 |
2,220 |
| Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | Drug given | J3420 |
48 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internal medicines at this location 2
Same specialty, same street address — most likely the same department or group.
Also at this address 1
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other internal medicines in Winnetka 7
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at Rush Medical College of Rush University 8
Other providers in the same specialty who trained at the same institution.
Class of 1986 at Rush Medical College of Rush University 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in IL who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.