John E. Lahaniatis, M.D.
Radiation Oncology Physician · Dover, DE
John E. Lahaniatis, M.D. is a radiation oncology physician with a practice address in Dover, Delaware, and NPI 1326023102, issued on Dec 14, 2005. Check the license (Delaware C1-0005989, as entered in NPPES) on the Delaware Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- John E. Lahaniatis
- Credential
- M.D.
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- C1-0005989 DE
Self-reported in NPPES; status is on the state search - Practice location
- 640 S State St FL 1, Dover, DE 19901
- Phone
- (302) 674-4401
- Enumerated
- Dec 14, 2005
- Record last updated
- Aug 2, 2022
- Fax
- (302) 674-4129
- Medicare enrollment
- Enrolled (PECOS I20040429001051); accepts Medicare assignment
- Medical or professional school
- Hahnemann University College Of Medicine, 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 19 in Delaware → Look up another NPI →
Also registered at 640 S State St FL 1
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mohamad Ghraowi, MDMedical Oncology Physician1942201439
- Tony Lee, MDRadiation Oncology Physician1588665178
- Khanh Nguyen, MDRadiation Oncology Physician1326144841
- David Suh, M.D.Radiation Oncology Physician1396768255
Verify John E. Lahaniatis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersDelaware Board of Medical Licensure and Discipline
Search for license C1-0005989Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.4 times the Medicare Part D claims of the average radiation oncology physician in 2024
596 Medicare Part D claims for 162 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 116 claims were for opioids.
Most prescribed
- Levothyroxine Sodium87 claims
- Hydrocodone-Acetaminophen51 claims
- Tamsulosin Hcl37 claims
- Lidocaine Hcl Viscous29 claims
- Dexamethasone23 claims
- Oxycodone-Acetaminophen21 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $21.63
1 payment: food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Bayhealth Medical Center, IncMilford, DE
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John E. Lahaniatis among 19 radiation oncology physician records in Delaware
John E. Lahaniatis, M.D. is one of 19 radiation oncology physician records with a practice address in Delaware. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1995 · median 2000 among the 14 with a school on file
- Record last updated2022 · 74% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Delaware practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Delaware
There are 19 radiation oncology physician records in Delaware.
All 19 in Delaware → Every provider in Dover → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Tony Lee, MDDover, DE 199011588665178
- Khanh Nguyen, MDDover, DE 199011326144841
- Yangyang Shi, MDDover, DE 199011134709751
- David Suh, M.D.Dover, DE 199011396768255
- Donald Tilton, D.O.Dover, DE 199041952380123
- Jennifer Hung, M.D.Rehoboth Beach, DE 199711720203235
- Andrejs Strauss, M.D.Rehoboth Beach, DE 199711356343552
- Samuel Swisher-McClure, MDRehoboth Beach, DE 199711669675880
Common questions
What is John E. Lahaniatis, M.D.'s NPI number?
John E. Lahaniatis, M.D.'s National Provider Identifier (NPI) is 1326023102, issued on Dec 14, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John E. Lahaniatis, M.D. located?
The NPPES record lists a practice address at 640 S State St FL 1, Dover, DE, 19901. Phone: (302) 674-4401. Providers update this record themselves, so call before visiting.
How can I verify John E. Lahaniatis, M.D.'s license?
NPPES lists Delaware license number C1-0005989, as entered by the provider. Search the Delaware Board of Medical Licensure and Discipline at https://delpros.delaware.gov/OH_VerifyLicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John E. Lahaniatis, M.D. prescribe under Medicare Part D?
In 2024, John E. Lahaniatis, M.D. had 596 Medicare Part D claims for 162 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.