DR. OTHON ILIOPOULOS MD
NPI 1447352448
Internal Medicine - Medical Oncology in Boston, MA

Active since September 01, 2006PECOS EnrolledAccepts Medicare Assignment
100 BLOSSOM STREET, YAW 7 MASSACHUSETTS GENERAL HOSPITAL, BOSTON, MA 02114(617) 724-3404(617) 726-8623 Get Directions Write a Review

NPPES record last updated: December 18, 2012. Verified against the NPPES registry weekly; last sync: July 19, 2026.

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About Dr. Othon Iliopoulos Md NPPES

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

DR. OTHON ILIOPOULOS MD (NPI 1447352448) is a medical oncology provider in Boston, Massachusetts, licensed in Massachusetts (76267) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Other (1985).Information from the official NPPES registry record, last updated December 18, 2012.

NPPES Registry Identity

NPI1447352448
Entity TypeIndividualMale
Provider Legal NameDR. OTHON ILIOPOULOSCredential: MD
Location Address100 BLOSSOM STREET, YAW 7 MASSACHUSETTS GENERAL HOSPITALBoston, MA 02114-2617
Mailing AddressPo Box 9142, Mass General Physician OrganizationCharlestown, MA 02129-9142 · (617) 724-3404 · Fax (617) 726-8623
Fax(617) 726-8623
Sole ProprietorNo
Medical School CMSOtherGraduated 1985
Enumeration DateSeptember 1, 2006
Last NPPES UpdateDecember 18, 2012
NPI 1447352448 is a valid, active identifier and passes the ISO check-digit test. How NPI validation works

Primary Specialty

Internal Medicine · Medical Oncology

Taxonomy 207RX0202X · Allopathic & Osteopathic Physicians

Licensed in MA · 76267

An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for… Show more

100 BLOSSOM STREET, Boston, MA 02114

Also on File with NPPES

Other Identifiers5
J12656 (Other, MA, Bcbs Ma)
076267 (Other, MA, Tufts Health Plan)
F30190 (Medicare UPIN)
0117749 (Medicaid, MA)
A32105 (Medicare ID-Type Unspecified, MA)

Medicare Participation & PECOS Enrollment Status

Othon Iliopoulos is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Othon Iliopoulos is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 5890778369

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20040608000437

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Provider Referred Orders for Durable Medical Equipment, Devices & Supplies

The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.

Unknown

  • Other-Enteral and Parenteral (OB005N)

    Parenteral nutrition solution, not otherwise specified, 10 grams lipids (HCPCS:B4185)

    2 DME suppliers used 23 Medicare Claims 837 Services Paid

  • Other-Enteral and Parenteral (OB005N)

    Parenteral nutrition solution; compounded amino acid and carbohydrates with electrolytes, trace elements and vitamins, including preparation, any strength, 74 to 100 grams of protein - premix (HCPCS:B4197)

    1 DME suppliers used 15 Medicare Claims 103 Services Paid

  • Other-Enteral and Parenteral (OB005N)

    Parenteral nutrition supply kit; premix, per day (HCPCS:B4220)

    2 DME suppliers used 23 Medicare Claims 158 Services Paid

  • Other-Enteral and Parenteral (OB005N)

    Parenteral nutrition administration kit, per day (HCPCS:B4224)

    2 DME suppliers used 23 Medicare Claims 158 Services Paid

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Established patient office or other outpatient visit, 40-54 minutes

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

This service was performed 58 times for 30 patients

Follow-up hospital inpatient care per day, typically 35 minutes

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.

This service was performed 59 times for 18 patients

Hospital discharge day management, 30 minutes or less

Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.

This service was performed 13 times for 13 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $47.46 for a new patient copayment and $27.79 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 02114 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99205

  • Average New Patient Price $189.86
  • Minimum New Patient Price $63.72
  • Maximum New Patient Price $189.86
  • Average New Patient Copayment $47.46
  • Minimum New Patient Copayment $15.93
  • Maximum New Patient Copayment $47.46

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $111.18
  • Minimum Established Patient Price $21.07
  • Maximum Established Patient Price $155.29
  • Average Established Patient Copayment $27.79
  • Minimum Established Patient Copayment $5.26
  • Maximum Established Patient Copayment $38.82

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Find Provider Hospital Affiliations - Privileges

Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.

Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Othon Iliopoulos is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
MASSACHUSETTS GENERAL HOSPITAL55 FRUIT STREET
BOSTON, MA 02114
(617) 724-9725Acute Care Hospitals

Reviews for DR. OTHON ILIOPOULOS MD

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Other Providers at the Same Location


The following 11 providers are registered at the same or a nearby location.

Nurse Practitioner
100 BLOSSOM STREET, COX 1 HEMATOLOGY ONCOLOGY ASSOCIATES
BOSTON, MA 02114
Internal Medicine (Medical Oncology)
100 BLOSSOM STREET, COX 640 HEMATOLOGY ONCOLOGY ASSOCIATES
BOSTON, MA 02114
Radiology (Radiation Oncology)
100 BLOSSOM STREET, COX 3
BOSTON, MA 02114
Allergy & Immunology
100 BLOSSOM STREET, COX 201
BOSTON, MA 02114
Internal Medicine (Endocrinology, Diabetes & Metabolism)
100 BLOSSOM STREET, COX BUILDING 1ST FLOOR, SUITE 140
BOSTON, MA, MA 02114
Social Worker (Clinical)
100 BLOSSOM STREET, COX BUILDING, FIRST FLOOR
BOSTON, MA 02114
Psychologist
100 BLOSSOM STREET, COX 110
BOSTON, MA 02114
Internal Medicine (Hematology & Oncology)
100 BLOSSOM STREET, COX 640 HEMATOLOGY ONCOLOGY ASSOCIATES
BOSTON, MA 02114
Internal Medicine
100 BLOSSOM STREET, HEMATOLOGY ONCOLOGY ASSOCIATES COX6
BOSTON, MA 02114
Internal Medicine
100 BLOSSOM STREET, COX 640 HEMATOLOGY ONCOLOGY ASSOCIATES
BOSTON, MA 02114
Radiology (Radiation Oncology)
100 BLOSSOM STREET
BOSTON, MA 02114

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1447352448, enumerated as an "individual" on September 01, 2006.

The provider is located at 100 BLOSSOM STREET YAW 7 MASSACHUSETTS GENERAL HOSPITAL BOSTON, MA 02114 and the phone number is (617) 724-3404.

Internal Medicine with taxonomy code 207RX0202X and a focus in Medical Oncology.

The provider might be accepting Accepts: Anthem Blue Cross and Blue Shield, Blue Cross Blue. Please consult your insurance carrier or call the provider to verify.

Othon Iliopoulos is affiliated with: MASSACHUSETTS GENERAL HOSPITAL.