Mark William Guelzow, MD - Medicare Family Practice in Fayetteville, NY

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Mark William Guelzow, MD is a medicare enrolled "Family Medicine" physician in Fayetteville, New York. He graduated from medical school in 2016 and has 8 years of diverse experience with area of expertise as Family Practice. He is a member of the group practice Chs Physician Partners Pc and his current practice location is 4101 Medical Center Dr Ste 1c, Fayetteville, New York. You can reach out to his office (for appointments etc.) via phone at (315) 637-7878.

Mark William Guelzow is licensed to practice in New York (license number 301689) 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 1124477484.

Contact Information

Mark William Guelzow, MD
4101 Medical Center Dr Ste 1c,
Fayetteville, NY 13066-6600
(315) 637-7878
Not Available

Map and Direction




Physician's Profile

Full NameMark William Guelzow
GenderMale
SpecialityFamily Practice
Experience8 Years
Location4101 Medical Center Dr Ste 1c, Fayetteville, New York
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:
  • Mark William Guelzow graduated from medical school in 2016
  NPI Data:
  • NPI Number: 1124477484
  • Provider Enumeration Date: 06/08/2016
  • Last Update Date: 07/03/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 0941634208
  • Enrollment ID: I20191220000187

Medical Identifiers

Medical identifiers for Mark William Guelzow such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1124477484NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine 301689 (New York)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Catholic Home CareFarmingdale, NYHome health agency
Kindred At Home (hauppauge)Hauppauge, NYHome health agency
Good Shepherd HospiceFarmingdale, NYHospice
St Charles HospitalPort jefferson, NYHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Chs Physician Partners Pc7618955667532

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. Mark William Guelzow allows following entities to bill medicare on his behalf.
Entity NameChs Physician Partners Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1164585725
PECOS PAC ID: 7618955667
Enrollment ID: O20040708000027
Entity NameSt Josephs Medical Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1942501747
PECOS PAC ID: 4688855844
Enrollment ID: O20110221000744

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. Mark William Guelzow 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
Mark William Guelzow, MD
8 Rowley Dr,
Northport, NY 11768-3244

Ph: (561) 523-3216		Mark William Guelzow, MD
4101 Medical Center Dr Ste 1c,
Fayetteville, NY 13066-6600

Ph: (315) 637-7878

Reviews and Comments


Family Medicine Doctors in Fayetteville, NY

Vijaya Seepana, MD
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 4101 Medical Center Dr, Fayetteville, NY 13066
Phone: 315-637-7878    
Dr. Linda Nancy Robinson, M.D.
Family Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 7107 Thorntree Hill Dr, Fayetteville, NY 13066
Phone: 315-637-1201    
Deann Lynn Cummings, MD.
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 4104 Medical Center Dr, Suite 104, Fayetteville, NY 13066
Phone: 315-663-0059    Fax: 315-663-0123
Allan M Birnbaum, MD
Family Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 4101 Medical Center Dr, Fayetteville, NY 13066
Phone: 315-637-7878    Fax: 315-637-7870
Roshan Ghimire, MD
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 4000 Medical Center Dr, Suite 104, Fayetteville, NY 13066
Phone: 315-637-7878    
Austin Tsai, M.D.
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 4000 Medical Center Dr Suite 104, Fayetteville, NY 13066
Phone: 315-663-0059    Fax: 315-663-0123

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.