John F Grehan, MD PHD - Medicare Thoracic Surgery in Sioux Falls, SD

John F Grehan, MD PHD is a medicare enrolled "Thoracic Surgery (cardiothoracic Vascular Surgery)" physician in Sioux Falls, South Dakota. He went to University Of Minnesota Medical School and graduated in 1995 and has 29 years of diverse experience with area of expertise as Thoracic Surgery. He is a member of the group practice Sanford Clinic and his current practice location is 1301 W 18th St, Sioux Falls, South Dakota. You can reach out to his office (for appointments etc.) via phone at (605) 312-2100.

John F Grehan is licensed to practice in South Dakota (license number 13118) 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 1275549784.

Contact Information

John F Grehan, MD PHD
1301 W 18th St,
Sioux Falls, SD 57105-0401
(605) 312-2100
Not Available



Physician's Profile

Full NameJohn F Grehan
GenderMale
SpecialityThoracic Surgery
Experience29 Years
Location1301 W 18th St, Sioux Falls, South Dakota
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:
  • John F Grehan attended and graduated from University Of Minnesota Medical School in 1995
  NPI Data:
  • NPI Number: 1275549784
  • Provider Enumeration Date: 08/01/2006
  • Last Update Date: 04/09/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 6204831324
  • Enrollment ID: I20220412001635

Medical Identifiers

Medical identifiers for John F Grehan such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1275549784NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208G00000XThoracic Surgery (cardiothoracic Vascular Surgery) 35.088377 (Ohio)Secondary
208G00000XThoracic Surgery (cardiothoracic Vascular Surgery) 13118 (South Dakota)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Sanford Usd Medical CenterSioux falls, SDHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Sanford Clinic0244143824228

News Archive

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Researchers from Italy have reported results from more than 10 years of follow-up showing that the placement of multiple endoscopic stents for the treatment of postoperative biliary strictures remains excellent with a low rate of stricture recurrence after this lengthy period of time. When strictures do recur, they can be safely and successfully retreated endoscopically. The study appears in the September issue of GIE: Gastrointestinal Endoscopy, the monthly peer-reviewed scientific journal of the American Society for Gastrointestinal Endoscopy (ASGE).

Zinc supplements reduce diarrhoea and infections in malnourished children

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Cepheid to launch GeneXpert Infinity-48 in Europe at 20th ECCMID

Cepheid will initiate European launch of its newest addition to the GeneXpert® family of molecular diagnostic testing systems, the GeneXpert Infinity-48, at the 20th annual European Congress of Clinical Microbiology & Infectious Diseases (ECCMID) in Vienna, Austria. The GeneXpert Infinity-48 System is the world's first and only fully-automated, random-access system designed for management of the entire molecular testing workflow — from sample data, cartridge loading and unloading, to final reporting of test results and disposal of cartridges.

Study provides new insight into blood cell and immune cell production

A healthy adult makes about 2 million blood cells every second, and 99 percent of them are oxygen-carrying red blood cells. The other one percent are platelets and the various white blood cells of the immune system.

Read more Medical News

› Verified 9 days ago

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. John F Grehan allows following entities to bill medicare on his behalf.
Entity NameSanford Clinic
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1396764254
PECOS PAC ID: 0244143824
Enrollment ID: O20031110000532

News Archive

Study: Stricture recurrence rate is low, recurrence can be retreated endoscopically

Researchers from Italy have reported results from more than 10 years of follow-up showing that the placement of multiple endoscopic stents for the treatment of postoperative biliary strictures remains excellent with a low rate of stricture recurrence after this lengthy period of time. When strictures do recur, they can be safely and successfully retreated endoscopically. The study appears in the September issue of GIE: Gastrointestinal Endoscopy, the monthly peer-reviewed scientific journal of the American Society for Gastrointestinal Endoscopy (ASGE).

Zinc supplements reduce diarrhoea and infections in malnourished children

Zinc supplements reduce diarrhoea and other infections in malnourished children, and may prevent death, according to a new study published in The Cochrane Library.

Ortho-McNeil terminates collaboration agreement with Arena on APD597 trial program

Arena Pharmaceuticals, Inc. announced today that, following the completion of a Phase 1 clinical trial program for APD597 (JNJ-38431055) under its collaboration with Arena, Ortho-McNeil-Janssen Pharmaceuticals, Inc., has decided not to advance APD597 and has notified Arena that it is terminating the collaboration, effective December 28, 2010.

Cepheid to launch GeneXpert Infinity-48 in Europe at 20th ECCMID

Cepheid will initiate European launch of its newest addition to the GeneXpert® family of molecular diagnostic testing systems, the GeneXpert Infinity-48, at the 20th annual European Congress of Clinical Microbiology & Infectious Diseases (ECCMID) in Vienna, Austria. The GeneXpert Infinity-48 System is the world's first and only fully-automated, random-access system designed for management of the entire molecular testing workflow — from sample data, cartridge loading and unloading, to final reporting of test results and disposal of cartridges.

Study provides new insight into blood cell and immune cell production

A healthy adult makes about 2 million blood cells every second, and 99 percent of them are oxygen-carrying red blood cells. The other one percent are platelets and the various white blood cells of the immune system.

Read more Medical News

› Verified 9 days ago

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. John F Grehan 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
John F Grehan, MD PHD
Po Box 5074,
Sioux Falls, SD 57117-5074

Ph: () -
John F Grehan, MD PHD
1301 W 18th St,
Sioux Falls, SD 57105-0401

Ph: (605) 312-2100

News Archive

Study: Stricture recurrence rate is low, recurrence can be retreated endoscopically

Researchers from Italy have reported results from more than 10 years of follow-up showing that the placement of multiple endoscopic stents for the treatment of postoperative biliary strictures remains excellent with a low rate of stricture recurrence after this lengthy period of time. When strictures do recur, they can be safely and successfully retreated endoscopically. The study appears in the September issue of GIE: Gastrointestinal Endoscopy, the monthly peer-reviewed scientific journal of the American Society for Gastrointestinal Endoscopy (ASGE).

Zinc supplements reduce diarrhoea and infections in malnourished children

Zinc supplements reduce diarrhoea and other infections in malnourished children, and may prevent death, according to a new study published in The Cochrane Library.

Ortho-McNeil terminates collaboration agreement with Arena on APD597 trial program

Arena Pharmaceuticals, Inc. announced today that, following the completion of a Phase 1 clinical trial program for APD597 (JNJ-38431055) under its collaboration with Arena, Ortho-McNeil-Janssen Pharmaceuticals, Inc., has decided not to advance APD597 and has notified Arena that it is terminating the collaboration, effective December 28, 2010.

Cepheid to launch GeneXpert Infinity-48 in Europe at 20th ECCMID

Cepheid will initiate European launch of its newest addition to the GeneXpert® family of molecular diagnostic testing systems, the GeneXpert Infinity-48, at the 20th annual European Congress of Clinical Microbiology & Infectious Diseases (ECCMID) in Vienna, Austria. The GeneXpert Infinity-48 System is the world's first and only fully-automated, random-access system designed for management of the entire molecular testing workflow — from sample data, cartridge loading and unloading, to final reporting of test results and disposal of cartridges.

Study provides new insight into blood cell and immune cell production

A healthy adult makes about 2 million blood cells every second, and 99 percent of them are oxygen-carrying red blood cells. The other one percent are platelets and the various white blood cells of the immune system.

Read more News

› Verified 9 days ago


Thoracic Surgery (Cardiothoracic Vascular Surgery) Doctors in Sioux Falls, SD

Dr. Paul E Meyer, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery)
Medicare: Accepting Medicare Assignments
Practice Location: 4520 W 69th St, Sioux Falls, SD 57108
Phone: 605-977-5000    Fax: 605-977-5377
Dr. Leycester Nmn Owens Jr., M. D.
Thoracic Surgery (Cardiothoracic Vascular Surgery)
Medicare: Not Enrolled in Medicare
Practice Location: 700 E Ridge Rd, Sioux Falls, SD 57105
Phone: 605-331-3554    
Dr. Tommy R Reynolds, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery)
Medicare: Accepting Medicare Assignments
Practice Location: 4520 W 69th St, Sioux Falls, SD 57108
Phone: 605-977-5000    Fax: 605-977-5377
Dr. Lewis C Ofstein, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery)
Medicare: Not Enrolled in Medicare
Practice Location: 4520 W 69th St, Sioux Falls, SD 57108
Phone: 605-977-5000    Fax: 605-977-5377
Kalyan C. Vunnamadala, M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery)
Medicare: Accepting Medicare Assignments
Practice Location: 4520 W 69th St, Sioux Falls, SD 57108
Phone: 605-977-5000    Fax: 605-977-5377
Marc J Schechter, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery)
Medicare: Not Enrolled in Medicare
Practice Location: 7307 S Grand Arbor Ct, Sioux Falls, SD 57108
Phone: 605-941-1866    

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