IVAN S. LOWENTHAL M.D. – NPI #1043245889
Internal Medicine
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 these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
IVAN LOWENTHAL is a physician located in TAMUNING, GU. NPPES has assigned the NPI number 1043245889 to IVAN LOWENTHAL on July 11, 2006. It is a Type-1 NPI, indicating this NPI number is associated with an individual. According to the NPI data, there are 2 additional location(s) assigned to this provider which are listed below. The primary taxonomy selected by this provider is 207RX0202X from the Health Care Provider Taxonomy code set, which is classified as Internal Medicine, specializing in Medical Oncology
The NPI profile was last updated on Mar 19, 2025. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for IVAN LOWENTHAL below.
NPI Profile for
IVAN S. LOWENTHAL
(about 20 years ago)
TAMUNING, GU 96913-3194 Phone: (671) 647-4656 Fax: (671) 647-4660
2 Other location(s):
North Haven, CT 06473-2222
Phone: (203) 407-8002
Cambridge, MA 02138-6820
Phone: (860) 307-3393
Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.
Identifiers for IVAN LOWENTHAL
Identifiers are used to associate other provider identifiers such as Medicaid or other insurers (ie:, Blue Cross, Blue Shield, Aetna, Kaiser-Permanente, etc.), with their NPI number. These identifiers can be used in matching an NPI number to an insurer's records. However, not all providers have such numbers and not all providers choose to include them in their NPI information.
See identifiers
| Description | Issuer | State | Identifier |
|---|---|---|---|
| other | CT CONTROLLED SUBSTANCE | CT | 1683 |
| other | CT. LICENSE | CT | 18789 |
| other | GUAM LICENSE | GU | M-1925 |
| other | TAX ID # | 06-1088532 | |
| medicaid | CT | 001187897 |
A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.
| Taxonomy Classification / Specialization | State | License |
|---|---|---|
| 207RX0202X - Internal Medicine / Medical Oncology (Primary) |
CT | 18789 |
The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.
Additional Information
- Refer to Part B
- Order Durable Medical Equipment
- Refer to Home Health Agency
- Order Power Mobility Devices
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