Marielly Sierra Mercado, MD - Medicare Endocrinology in San Juan, PR

Marielly Sierra Mercado, MD is a medicare enrolled "Internal Medicine - Endocrinology, Diabetes & Metabolism" physician in San Juan, Puerto Rico. She graduated from medical school in 2011 and has 13 years of diverse experience with area of expertise as Endocrinology. Her current practice location is University District Hospital, Medical Center Bo Monacillos, San Juan, Puerto Rico. You can reach out to her office (for appointments etc.) via phone at (787) 754-0101.

Marielly Sierra Mercado is licensed to practice in Puerto Rico (license number 19192) and she also participates in the medicare program. She may accept medicare assignments (which means she may accept the Medicare-approved amount; you may be billed for more than the Medicare deductible and coinsurance) and her NPI Number is 1013258482.

Contact Information

Marielly Sierra Mercado, MD
University District Hospital, Medical Center Bo Monacillos,
San Juan, PR 00935
(787) 754-0101
Not Available

Map and Direction




Physician's Profile

Full NameMarielly Sierra Mercado
GenderFemale
SpecialityEndocrinology
Experience13 Years
LocationUniversity District Hospital, San Juan, Puerto Rico
Accepts Medicare AssignmentsMay be. She may accept the Medicare-approved amount; you may be billed for more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Marielly Sierra Mercado graduated from medical school in 2011
  NPI Data:
  • NPI Number: 1013258482
  • Provider Enumeration Date: 03/11/2013
  • Last Update Date: 07/26/2018
  Medicare PECOS Information:
  • PECOS PAC ID: 1153669213
  • Enrollment ID: I20190214002620

Medical Identifiers

Medical identifiers for Marielly Sierra Mercado such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1013258482NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 19192 (Puerto Rico)Secondary
207RE0101XInternal Medicine - Endocrinology, Diabetes & Metabolism 19192 (Puerto Rico)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. Marielly Sierra Mercado allows following entities to bill medicare on her behalf.
Entity NamePro Health Clinical Services Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1881003382
PECOS PAC ID: 1759692478
Enrollment ID: O20150623000748
Entity NameUnited Endocrinology Services
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1760969109
PECOS PAC ID: 0244578300
Enrollment ID: O20190214002376

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. Marielly Sierra Mercado 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
Marielly Sierra Mercado, MD
Po Box 366791,
San Juan, PR 00936-6791

Ph: (787) 754-0101
Marielly Sierra Mercado, MD
University District Hospital, Medical Center Bo Monacillos,
San Juan, PR 00935

Ph: (787) 754-0101

Reviews and Comments


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Dr. Alberto T Lopez-enriquez, MD,FACP
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Dr. Gregorio A. Cortes-soto, M.D.
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Phone: 787-726-8396    Fax: 787-727-6672

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.