Margaret S Tretter, DO, FACP - Medicare Hospitalist in Allentown, PA

Margaret S Tretter, DO, FACP is a medicare enrolled "Hospitalist" physician in Allentown, Pennsylvania. Her current practice location is 1255 S Cedar Crest Blvd, Suite 2200, Allentown, Pennsylvania. You can reach out to her office (for appointments etc.) via phone at (610) 437-9006.

Margaret S Tretter is licensed to practice in Pennsylvania (license number OS005189L) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1477550382.

Contact Information

Margaret S Tretter, DO, FACP
1255 S Cedar Crest Blvd, Suite 2200,
Allentown, PA 18103-6256
(610) 437-9006
(610) 437-1942

Map and Direction




Physician's Profile

Full NameMargaret S Tretter
GenderFemale
SpecialityHospitalist
Location1255 S Cedar Crest Blvd, Allentown, Pennsylvania
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1477550382
  • Provider Enumeration Date: 07/07/2005
  • Last Update Date: 02/09/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 9638350226
  • Enrollment ID: I20110302000778

Medical Identifiers

Medical identifiers for Margaret S Tretter such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1477550382NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine OS005189L (Pennsylvania)Secondary
207RG0300XInternal Medicine - Geriatric Medicine OS005189L (Pennsylvania)Secondary
208M00000XHospitalist OS005189L (Pennsylvania)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. Margaret S Tretter allows following entities to bill medicare on her behalf.
Entity NameLehigh Valley Physician Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1457309650
PECOS PAC ID: 3072425123
Enrollment ID: O20040227000335

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. Margaret S Tretter 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
Margaret S Tretter, DO, FACP
Po Box 783311,
Philadelphia, PA 19178-3311

Ph: (484) 884-4500
Margaret S Tretter, DO, FACP
1255 S Cedar Crest Blvd, Suite 2200,
Allentown, PA 18103-6256

Ph: (610) 437-9006

Reviews and Comments


Hospitalist Doctors in Allentown, PA

Arune Gulati, MD
Hospitalist
Medicare: Medicare Enrolled
Practice Location: 1250 S Cedar Crest Blvd Ste 300, Allentown, PA 18103
Phone: 610-402-3110    
Aarshitha Srinivas Katta, DO
Hospitalist
Medicare: Medicare Enrolled
Practice Location: 1200 S Cedar Crest Blvd, Allentown, PA 18103
Phone: 610-402-5369    
Michael Cheung, M.D.
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 1250 S Cedar Crest Blvd, Suite 300, Allentown, PA 18103
Phone: 610-402-3110    Fax: 610-402-3112
Jessica Mehring Small, D.O.
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 1200 S Cedar Crest Blvd, Allentown, PA 18103
Phone: 610-402-5369    
Wen Zhang, DO
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 3080 Hamilton Blvd Ste 350, Allentown, PA 18103
Phone: 484-661-4650    Fax: 610-402-1153
Dr. Joel Wagstaff, D.O.
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 707 Hamilton Street, One City Center, 9th Floor, Allentown, PA 18104
Phone: 484-862-3159    
Lei Li, M.D.
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 3080 Hamilton Blvd, Suite 350, Allentown, PA 18103
Phone: 484-661-4650    Fax: 610-402-1153

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.