James Lewis, - Medicare Gastroenterology in Washington, DC

James Lewis, is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Washington, District Of Columbia. He went to State University Of New York Downstate Medical Center and graduated in 1975 and has 49 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Medstar Medical Group Ii Llc and his current practice location is 3800 Reservoir Rd Nw, Washington, District Of Columbia. You can reach out to his office (for appointments etc.) via phone at (202) 444-8541.

James Lewis is licensed to practice in District Of Columbia (license number 11532) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1396745212.

Contact Information

James Lewis,
3800 Reservoir Rd Nw,
Washington, DC 20007-2113
(202) 444-8541
Not Available



Physician's Profile

Full NameJames Lewis
GenderMale
SpecialityGastroenterology
Experience49 Years
Location3800 Reservoir Rd Nw, Washington, District Of Columbia
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • James Lewis attended and graduated from State University Of New York Downstate Medical Center in 1975
  NPI Data:
  • NPI Number: 1396745212
  • Provider Enumeration Date: 07/22/2005
  • Last Update Date: 03/08/2012
  Medicare PECOS Information:
  • PECOS PAC ID: 6406982966
  • Enrollment ID: I20100413000105

Medical Identifiers

Medical identifiers for James Lewis such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1396745212NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology 11532 (District Of Columbia)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Medstar Georgetown University HospitalWashington, DCHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Medstar Medical Group Ii Llc05474138251776

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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. James Lewis allows following entities to bill medicare on his behalf.
Entity NameMgmc Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1891797148
PECOS PAC ID: 9537073119
Enrollment ID: O20031220000056

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Entity NameMedstar Medical Group Ii Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1184046187
PECOS PAC ID: 0547413825
Enrollment ID: O20130117000415

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› Verified 8 days ago

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. James Lewis 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
James Lewis,
Po Box 418283,
Boston, MA 02241-8283

Ph: (703) 558-1544
James Lewis,
3800 Reservoir Rd Nw,
Washington, DC 20007-2113

Ph: (202) 444-8541

News Archive

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A retrospective study published online ahead of print in the medical journal Urology by a physician team from Roswell Park Cancer Institute (RPCI) found that patients with metastatic kidney cancer — even those with chronic renal insufficiency — can tolerate and benefit from a treatment called high-dose interleukin-2 (HDIL-2) immunotherapy.

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Small intravenous devices (IVDs) commonly used in the hand or arm do not need to be moved routinely every 3 days. A randomized controlled trial comparing regular relocation with relocation on clinical indication, published in the open access journal BMC Medicine, found that rates of complications were the same for both regimens.

New drugs to fight colon and breast cancer

A study on epithelial cell lines has allowed for the development of six new drugs to fight colon and breast cancer more effectively than other currently used drugs.

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Read more News

› Verified 8 days ago


Internal Medicine Doctors in Washington, DC

Dr. Adefolaju Oketokun, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 1629 K Street Nw, Suite 300, Washington, DC 20006
Phone: 202-636-1360    Fax: 202-636-5137
Dr. Uzoamaka Theodora Nwaogwugwu, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 2041 Georgia Avenue Nw, Washington, DC 20060
Phone: 202-865-7677    
Ms. Sruthi Nukalapati Reddy, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 3800 Reservoir Road Nw, 6 Phc, Washington, DC 20007
Phone: 202-444-8123    
Dr. Kaustubh Subhash Yadwadkar, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 3800 Reservoir Rd Nw, Cg201, Washington, DC 20007
Phone: 304-206-7595    
Dr. Monica Vohra, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 1525 7th St Nw, Washington, DC 20001
Phone: 202-386-7020    Fax: 202-265-1970
Anteneh A Tesfaye, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 110 Irving St Nw Ste C2151, Washington, DC 20010
Phone: 202-877-6998    Fax: 202-877-8909
Erica Nakajima,
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 5255 Loughboro Rd Nw Fl 1, Washington, DC 20016
Phone: 202-660-6500    

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