Dr Mark Allan Walker, MD - Medicare Internal Medicine in Halethorpe, MD

Dr Mark Allan Walker, MD is a medicare enrolled "Internal Medicine - Endocrinology, Diabetes & Metabolism" physician in Halethorpe, Maryland. His current practice location is 1701 Twin Springs Rd, Kaiser Permanente South Baltimore County Medical Center, Halethorpe, Maryland. You can reach out to his office (for appointments etc.) via phone at (410) 737-5540.

Dr Mark Allan Walker is licensed to practice in Maryland (license number D0037239) 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 1083716823.

Contact Information

Dr Mark Allan Walker, MD
1701 Twin Springs Rd, Kaiser Permanente South Baltimore County Medical Center,
Halethorpe, MD 21227-3553
(410) 737-5540
(410) 737-5531

Map and Direction




Physician's Profile

Full NameDr Mark Allan Walker
GenderMale
SpecialityInternal Medicine - Endocrinology, Diabetes & Metabolism
Location1701 Twin Springs Rd, Halethorpe, Maryland
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1083716823
  • Provider Enumeration Date: 09/02/2006
  • Last Update Date: 10/29/2013
  Medicare PECOS Information:
  • PECOS PAC ID: 2567512486
  • Enrollment ID: I20101112000452

Medical Identifiers

Medical identifiers for Dr Mark Allan Walker such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1083716823NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RE0101XInternal Medicine - Endocrinology, Diabetes & Metabolism D0037239 (Maryland)Primary
207RE0101XInternal Medicine - Endocrinology, Diabetes & Metabolism 0101250822 (Virginia)Secondary
207RE0101XInternal Medicine - Endocrinology, Diabetes & Metabolism MD039279 (District Of Columbia)Secondary

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 Mark Allan Walker allows following entities to bill medicare on his behalf.
Entity NameKaiser Foundation Health Plan Of The Mid-atlantic States, Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1952461816
PECOS PAC ID: 3779495858
Enrollment ID: O20040105000308

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 Mark Allan Walker 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 Mark Allan Walker, MD
2101 E Jefferson St, Kaiser Permanente Medicare Enrollment,
Rockville, MD 20852-4908

Ph: (301) 816-2424
Dr Mark Allan Walker, MD
1701 Twin Springs Rd, Kaiser Permanente South Baltimore County Medical Center,
Halethorpe, MD 21227-3553

Ph: (410) 737-5540

Reviews and Comments


Internal Medicine Doctors in Halethorpe, MD

Adeel Khalid Choudhary,
Endocrinology, Diabetes & Metabolism
Medicare: Accepting Medicare Assignments
Practice Location: 1701 Twin Springs Rd, Halethorpe, MD 21227
Phone: 410-737-5000    
Leopoldine Modjo Kenmogne, MD
Endocrinology, Diabetes & Metabolism
Medicare: Accepting Medicare Assignments
Practice Location: 1701 Twin Springs Rd, Halethorpe, MD 21227
Phone: 410-737-5000    
May Alattar, MD
Endocrinology, Diabetes & Metabolism
Medicare: Accepting Medicare Assignments
Practice Location: 1701 Twin Springs Rd, Halethorpe, MD 21227
Phone: 410-737-5000    
Dr. Grace Gia-ling Wong Casserly, MD
Endocrinology, Diabetes & Metabolism
Medicare: Accepting Medicare Assignments
Practice Location: 1701 Twin Springs Rd, Halethorpe, MD 21227
Phone: 410-737-5000    
Mr. Emil G Thattassery, M.D.
Endocrinology, Diabetes & Metabolism
Medicare: Accepting Medicare Assignments
Practice Location: 1701 Twin Springs Road, Halethorpe, MD 21227
Phone: 410-737-5260    Fax: 410-737-5265
Dr. Tisha Barnett, M.D.
Endocrinology, Diabetes & Metabolism
Medicare: Accepting Medicare Assignments
Practice Location: 1701 Twin Springs Rd, Halethorpe, MD 21227
Phone: 410-737-5660    

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.