Dr Ivan Stephen Lowenthal, MD - Medicare Internal Medicine in Tamuning, GU

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Dr Ivan Stephen Lowenthal, MD is a medicare enrolled "Internal Medicine - Medical Oncology" physician in Tamuning, Guam. His current practice location is 633 Gov Carlos Camacho Rd., Ste B5, Tamuning, Guam. You can reach out to his office (for appointments etc.) via phone at (671) 647-4656.

Dr Ivan Stephen Lowenthal is licensed to practice in Guam (license number M-1925) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1043245889.

Contact Information

Dr Ivan Stephen Lowenthal, MD
633 Gov Carlos Camacho Rd., Ste B5,
Tamuning, GU 96913-3194
(671) 647-4656
(671) 647-4660

Map and Direction




Physician's Profile

Full NameDr Ivan Stephen Lowenthal
GenderMale
SpecialityInternal Medicine - Medical Oncology
Location633 Gov Carlos Camacho Rd., Ste B5, Tamuning, Guam
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1043245889
  • Provider Enumeration Date: 07/11/2006
  • Last Update Date: 03/19/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 3678569191
  • Enrollment ID: I20110112000834

Medical Identifiers

Medical identifiers for Dr Ivan Stephen Lowenthal such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1043245889NPI-NPPES
001187897MedicaidCT
18789OtherCTCT. LICENSE
M-1925OtherGUGUAM LICENSE
06-1088532OtherTAX ID #
1683OtherCTCT CONTROLLED SUBSTANCE

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RX0202XInternal Medicine - Medical Oncology 18789 (Connecticut)Secondary
207RX0202XInternal Medicine - Medical Oncology M-1925 (Guam)Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr Ivan Stephen Lowenthal allows following entities to bill medicare on his behalf.
Entity NameYale University
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1205822236
PECOS PAC ID: 9436061736
Enrollment ID: O20031105000015
Entity NameYale New Haven Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1336139500
PECOS PAC ID: 8325935018
Enrollment ID: O20040227000825

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr Ivan Stephen Lowenthal is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr Ivan Stephen Lowenthal, MD
633 Gov Carlos Camacho Rd., Ste B5,
Tamuning, GU 96913-3194

Ph: (671) 647-4656		Dr Ivan Stephen Lowenthal, MD
633 Gov Carlos Camacho Rd., Ste B5,
Tamuning, GU 96913-3194

Ph: (671) 647-4656

Reviews and Comments


Internal Medicine Doctors in Tamuning, GU

Dr. Pablo Soriano Guzman, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 543 Guma Yuos St., Tamuning, GU 96913
Phone: 671-646-9696    Fax: 671-649-6601
Dr. Erika Masuda Alford, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1244 N Marine Corps Dr, Tamuning, GU 96913
Phone: 671-647-8262    
Mr. Romeo M Samonte, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1757 Army Dr, Suite 108, Tamuning, GU 96913
Phone: 671-647-4533    Fax: 671-647-1110
Annakutty Mathew, M.D.
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 850 Gov. Carlos Camacho Rd., Tamuning, GU 96913
Phone: 671-647-2330    
Paul Alfred Muna Aguon, M.D.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 850 Gov Carlos G Camacho Rd, Tamuning, GU 96913
Phone: 671-683-8484    
Dr. Doris Po Lim, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 241 Farenholt Avenue, Oka Bldg., Suite 208, Tamuning, GU 96913
Phone: 671-646-8845    Fax: 671-646-8917

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.