Deana L. Dy, M.D.
Allergy & Immunology Physician · Crystal Lake, IL
Deana L. Dy, M.D. is an allergy & immunology physician with a practice address in Crystal Lake, Illinois, and NPI 1518950781, issued on Aug 23, 2005. Check the license (Illinois 036-057986, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Deana L. Dy
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- License number
- 036-057986 IL
Self-reported in NPPES; status is on the state search - Practice location
- 25 S Virginia St, Crystal Lake, IL 60014
- Phone
- (815) 459-5440
- Enumerated
- Aug 23, 2005
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest allergy & immunology physician records → All 162 in Illinois → Look up another NPI →
Also registered at 25 S Virginia St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Deana L. Dy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036-057986Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Deana L. Dy among 162 allergy & immunology physician records in Illinois
Deana L. Dy, M.D. is one of 162 allergy & immunology physician records with a practice address in Illinois. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileNo · 86% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2007 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207K00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology Physician providers in Illinois
There are 162 allergy & immunology physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 162 in Illinois → Every provider in Crystal Lake → Allergy & Immunology Physician nationwide →
The 8 allergy & immunology physician records with the nearest ZIP codes
- Noga Askenazi, MDCrystal Lake, IL 600141972518702
- Sahar Rida, M.D.Des Plaines, IL 600161285833566
- Suellyn Rossman, MDDes Plaines, IL 600161790773216
- James Moss, MDElk Grove Village, IL 600071194725291
- Bella LermanArlington Heights, IL 600051134561616
- Newton Li, M.D.Arlington Heights, IL 600041285897728
- Evelyn Angulo, M.D.Glenview, IL 600261184967770
- Yasmeen Bilimoria, MDGlenview, IL 600261780636662
Common questions
What is Deana L. Dy, M.D.'s NPI number?
Deana L. Dy, M.D.'s National Provider Identifier (NPI) is 1518950781, issued on Aug 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Deana L. Dy, M.D. located?
The NPPES record lists a practice address at 25 S Virginia St, Crystal Lake, IL, 60014. Phone: (815) 459-5440. Providers update this record themselves, so call before visiting.
How can I verify Deana L. Dy, M.D.'s license?
NPPES lists Illinois license number 036-057986, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.