Dr Mark W Sheehan, MD - Medicare Internal Medicine in Littleton, CO

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Dr Mark W Sheehan, MD is a medicare enrolled "Internal Medicine - Cardiovascular Disease" physician in Littleton, Colorado. His current practice location is 1000 Southpark Dr, Littleton, Colorado. You can reach out to his office (for appointments etc.) via phone at (303) 744-1065.

Dr Mark W Sheehan is licensed to practice in Colorado (license number 22162) 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 1568450674.

Contact Information

Dr Mark W Sheehan, MD
1000 Southpark Dr,
Littleton, CO 80120-5654
(303) 744-1065
(303) 733-1699

Map and Direction




Physician's Profile

Full NameDr Mark W Sheehan
GenderMale
SpecialityInternal Medicine - Cardiovascular Disease
Location1000 Southpark Dr, Littleton, Colorado
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1568450674
  • Provider Enumeration Date: 10/12/2005
  • Last Update Date: 10/12/2012
  Medicare PECOS Information:
  • PECOS PAC ID: 8224029558
  • Enrollment ID: I20040524001017

Medical Identifiers

Medical identifiers for Dr Mark W Sheehan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1568450674NPI-NPPES
01221621MedicaidCO

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RC0000XInternal Medicine - Cardiovascular Disease 22162 (Colorado)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 Mark W Sheehan allows following entities to bill medicare on his behalf.
Entity NamePortercare Adventist Health System
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760761928
PECOS PAC ID: 0941110886
Enrollment ID: O20090115000327
Entity NameEkg Associates Prof Llp
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1255628012
PECOS PAC ID: 9830361286
Enrollment ID: O20111007000551
Entity NameSouth Denver Castle Rock Ekg Interpretation Group Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1659711745
PECOS PAC ID: 6305078882
Enrollment ID: O20140416000114
Entity NameSouth Denver Parker Ekg Interpretation Group Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1114367208
PECOS PAC ID: 1456575570
Enrollment ID: O20140617000989
Entity NamePortercare Adventist Health System
Entity TypePart B Supplier - Intensive Cardiac Rehabilitation
Entity IdentifiersNPI Number: 1750832382
PECOS PAC ID: 0941110886
Enrollment ID: O20161117001747

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 W Sheehan 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 W Sheehan, MD
1000 Southpark Dr,
Littleton, CO 80120-5654

Ph: (303) 744-1065		Dr Mark W Sheehan, MD
1000 Southpark Dr,
Littleton, CO 80120-5654

Ph: (303) 744-1065

Reviews and Comments


Internal Medicine Doctors in Littleton, CO

Dr. Erin Elizabeth Riggle, M.D.
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 15 W Dry Creek Cir, Littleton, CO 80120
Phone: 303-952-1100    Fax: 303-952-8185
Kathryn J Wood,
Cardiovascular Disease
Medicare: Not Enrolled in Medicare
Practice Location: 5257 S Wadsworth Blvd, Littleton, CO 80123
Phone: 303-743-5855    
William T Gipson, M.D.
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 1420 W Canal Ct, Ste 100, Littleton, CO 80120
Phone: 303-791-7540    Fax: 303-791-2241
James Young Rhee, MD
Cardiovascular Disease
Medicare: Accepting Medicare Assignments
Practice Location: 1001 Southpark Dr, Littleton, CO 80120
Phone: 303-722-8987    Fax: 303-722-2935
Sheanna L Barclay,
Cardiovascular Disease
Medicare: Not Enrolled in Medicare
Practice Location: 7600 Shaffer Pkwy, Littleton, CO 80127
Phone: 303-338-4545    
Mary S Todd,
Cardiovascular Disease
Medicare: Not Enrolled in Medicare
Practice Location: 5257 S Wadsworth Blvd, Littleton, CO 80123
Phone: 303-743-5855    
Lea A Craig,
Cardiovascular Disease
Medicare: Not Enrolled in Medicare
Practice Location: 5555 E Arapahoe Rd, Littleton, CO 80122
Phone: 303-850-5868    

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.