Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. LEONIDAS NIKOLAOS DIAMANTOPOULOS MD
NPI 1295358273
Nuclear Medicine in New York, NY

Active since May 25, 2020PECOS EnrolledAccepts Medicare Assignment
1 GUSTAVE L LEVY PL # 1234, NEW YORK, NY 10029(212) 241-3678 Get Directions Write a Review

NPPES record last updated: June 24, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Oct 8, 2024, Jul 9, 2024, Oct 25, 2023 and 3 more (6 updates tracked since 2020).

About Dr. Leonidas Nikolaos Diamantopoulos Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. LEONIDAS NIKOLAOS DIAMANTOPOULOS MD (NPI 1295358273) is an individual nuclear medicine provider in New York, New York, licensed in New York (329062) and active in the NPI registry since May 2020. He is enrolled in Medicare PECOS, is affiliated with Staten Island University Hospital, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1295358273
Entity TypeIndividualMale
Primary Taxonomy207U00000X
Provider Legal NameDR. LEONIDAS NIKOLAOS DIAMANTOPOULOSCredential: MD
Location Address1 GUSTAVE L LEVY PL # 1234New York, NY 10029-6504
Mailing Address1 Gustave L Levy Pl # 1234New York, NY 10029-6504 · (212) 241-3678
Sole ProprietorNo
Medical School CMSOtherGraduated 2016
Enumeration DateMay 25, 2020
Last NPPES UpdateJune 24, 20266 updates tracked since enumeration
NPPES CertifiedJune 24, 2026
NPI 1295358273 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

Primary SpecialtyNuclear MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207U00000X
License Licensed in NY · 329062
Definition
A nuclear medicine specialist employs the properties of radioactive atoms and molecules in the diagnosis and treatment of disease and in research. Radiation detection and imaging instrument systems are used to detect disease as it changes the function and metabolism of normal cells, tissues and organs. A wide variety of diseases can be found in this way, usually before the structure of the organ involved by the disease can be seen to be abnormal by any other techniques. Early detection of coronary artery disease (including acute heart attack), early cancer detection and evaluation of the effect of tumor treatment, diagnosis of infection and inflammation anywhere in the body and early detection of blood clot in the lungs are all possible with these techniques. Unique forms of radioactive molecules can attack and kill cancer cells (e.g., lymphoma, thyroid cancer) or can relieve the severe pain of cancer that has spread to bone
Also ListedInternal MedicineTaxonomy 207R00000X · License 329062 (NY)
Also ListedInternal Medicine · Hematology & OncologyTaxonomy 207RH0003X · License 73326 (MN)
1 GUSTAVE L LEVY PL # 1234, New York, NY 10029

Secondary Practice Locations 3

Location 13459 5th Ave Ste 9Pittsburgh, PA 15213-3236 · Phone (412) 692-4888
Location 2375 Seguine AveStaten Island, NY 10309-3932 · Phone (718) 226-9000
Location 3200 1st St SWRochester, MN 55905-0001 · Phone (507) 284-2511

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. Leonidas Nikolaos Diamantopoulos Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID648693630
PECOS Enrollment IDI20240530002496
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
167 services80 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
104 services47 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
45 services45 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
19 services17 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
16 services16 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Staten Island University Hospital

Acute Care Hospitals · Staten Island, NY
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330160
Location475 Seaview AvenueStaten Island, NY 10305 · Richmond County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10029 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$150.24 typical visit price
range $65.69 – $198.19
Typical copayment $37.56 (range $16.42 – $49.54)
Most-billed visit code 99204
Established Patient
$114.88 typical visit price
range $21.20 – $160.66
Typical copayment $28.72 (range $5.30 – $40.16)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
2 suppliers16 claims16 services$78.36 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Nuclear Medicine
1 GUSTAVE L LEVY PL # 1234
NEW YORK, NY 10029
Student in an Organized Health Care Education/Training Program
1 GUSTAVE L LEVY PL # 1234
NEW YORK, NY 10029
Student in an Organized Health Care Education/Training Program
1 GUSTAVE L LEVY PL # 1234, ONE GUSTAVE L. LEVY PLACE, BOX 1234
NEW YORK, NY 10029
Radiology (Body Imaging)
1 GUSTAVE L LEVY PL # 1234
NEW YORK, NY 10029
Student in an Organized Health Care Education/Training Program
1 GUSTAVE L LEVY PL # 1234
NEW YORK, NY 10029
Radiology (Diagnostic Radiology)
1 GUSTAVE L LEVY PL # 1234
NEW YORK, NY 10029
Radiology (Vascular & Interventional Radiology)
1 GUSTAVE L LEVY PL # 1234
NEW YORK, NY 10029
Radiology (Diagnostic Radiology)
1 GUSTAVE L LEVY PL # 1234
NEW YORK, NY 10029

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Leonidas Diamantopoulos's NPI number?

The NPI number for Leonidas Diamantopoulos is 1295358273. It was assigned to this individual provider in the NPPES registry on May 25, 2020.

Where is Leonidas Diamantopoulos located?

Leonidas Diamantopoulos practices at 1 Gustave L Levy Pl # 1234, New York, NY 10029. The listed phone number is (212) 241-3678.

What is Leonidas Diamantopoulos's specialty?

The primary specialty registered for this NPI is Nuclear Medicine with taxonomy code 207U00000X.

Is Leonidas Diamantopoulos enrolled in Medicare?

Yes. Leonidas Diamantopoulos is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Leonidas Diamantopoulos affiliated with any hospitals?

According to CMS data, Leonidas Diamantopoulos is affiliated with Staten Island University Hospital.

When was this NPI record last updated?

The NPPES record for Leonidas Diamantopoulos was last updated on June 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 49 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.