Bartholomew David Sak, MD - Medicare Internal Medicine in Muskegon, MI

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Bartholomew David Sak, MD is a medicare enrolled "Hospitalist" physician in Muskegon, Michigan. He graduated from medical school in 1993 and has 33 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Mercy Specialty Services and his current practice location is 1500 E Sherman Blvd, Muskegon, Michigan. You can reach out to his office (for appointments etc.) via phone at (231) 672-3883.

Bartholomew David Sak is licensed to practice in Michigan (license number 4301068868) 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 1093755167.

Contact Information

Bartholomew David Sak, MD
1500 E Sherman Blvd,
Muskegon, MI 49444-1849
(231) 672-3883
(231) 672-3973

Map and Direction




Physician's Profile

Full NameBartholomew David Sak
GenderMale
SpecialityInternal Medicine
Experience33 Years
Location1500 E Sherman Blvd, Muskegon, Michigan
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:
  • Bartholomew David Sak graduated from medical school in 1993
  NPI Data:
  • NPI Number: 1093755167
  • Provider Enumeration Date: 06/07/2006
  • Last Update Date: 04/22/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 1658267877
  • Enrollment ID: I20040225000342

Medical Identifiers

Medical identifiers for Bartholomew David Sak such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1093755167NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208M00000XHospitalist 4301068868 (Michigan)Primary
207R00000XInternal Medicine 4301068868 (Michigan)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Mercy Health Hackley CampusMuskegon, MIHospital
North Ottawa Community Health SystemGrand haven, MIHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Mercy Specialty Services236543954478

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. Bartholomew David Sak allows following entities to bill medicare on his behalf.
Entity NameSpectrum Health Primary Care Partners
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1235188673
PECOS PAC ID: 4587568647
Enrollment ID: O20031121000091
Entity NameAspirus Ironwood Hospital & Clinics Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1992704753
PECOS PAC ID: 9032013198
Enrollment ID: O20031121000096
Entity NameMercy Physician Network
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1023056744
PECOS PAC ID: 8921996307
Enrollment ID: O20040308000687
Entity NameMercy Specialty Services
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1629010384
PECOS PAC ID: 2365439544
Enrollment ID: O20040429000064
Entity NameHospitalist Medicine Physicians Of Michigan Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1013180181
PECOS PAC ID: 4486703170
Enrollment ID: O20090529000290
Entity NameSound Inpatient Physicians-michigan Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1639311996
PECOS PAC ID: 5395896849
Enrollment ID: O20090624000252

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. Bartholomew David Sak 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
Bartholomew David Sak, MD
1560 E Sherman Blvd Ste 240,
Muskegon, MI 49444-1854

Ph: (231) 672-3883		Bartholomew David Sak, MD
1500 E Sherman Blvd,
Muskegon, MI 49444-1849

Ph: (231) 672-3883

Reviews and Comments


Hospitalist Doctors in Muskegon, MI

Kyle Nathaniel Turcic, MD
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Practice Location: 1500 E Sherman Blvd, Muskegon, MI 49444
Phone: 231-672-2000    
Dr. Peyton Paul Faganel, DO
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William Alex Grady, PA-C
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Phone: 231-672-8282    Fax: 231-672-8271
Jon Michael Carnahan, DO
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Practice Location: 1500 E Sherman Blvd, Muskegon, MI 49444
Phone: 231-672-3883    Fax: 231-672-3973
Dr. Sripriya Ganesan,
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Practice Location: 1675 Leahy St Ste 304b, Muskegon, MI 49442
Phone: 231-728-1695    
Matthew Anthony Wagner, DO
Hospitalist
Medicare: Accepting Medicare Assignments
Practice Location: 1500 E Sherman Blvd, Muskegon, MI 49444
Phone: 231-672-2000    

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.