Gregory M Keelen, DO - Medicare Emergency Medicine in Denison, TX

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Gregory M Keelen, DO is a medicare enrolled "Emergency Medicine" physician in Denison, Texas. His current practice location is 5016 Us-75, Tmc Emergency Department, Denison, Texas. You can reach out to his office (for appointments etc.) via phone at (214) 433-9602.

Gregory M Keelen is licensed to practice in Texas (license number M1822) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1811905227.

Contact Information

Gregory M Keelen, DO
5016 Us-75, Tmc Emergency Department,
Denison, TX 75020
(214) 433-9602
(214) 433-9602

Map and Direction




Physician's Profile

Full NameGregory M Keelen
GenderMale
SpecialityEmergency Medicine
Location5016 Us-75, Denison, Texas
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1811905227
  • Provider Enumeration Date: 08/03/2006
  • Last Update Date: 01/22/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 6002813417
  • Enrollment ID: I20061027000198

Medical Identifiers

Medical identifiers for Gregory M Keelen such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1811905227NPI-NPPES
P00312435OtherTXRR MEDICARE
188205201MedicaidTX
8V3644OtherTXBLUE CROSS BLUE SHIELD

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine M1822 (Texas)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. Gregory M Keelen allows following entities to bill medicare on his behalf.
Entity NameTruepartners Northwest Emergency Associates Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1912447319
PECOS PAC ID: 4880970466
Enrollment ID: O20170413002085
Entity NameLevel One Emergency Physicians Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1528790193
PECOS PAC ID: 7810371044
Enrollment ID: O20220907000904
Entity NameLevel One Emergency Specialists Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1427780097
PECOS PAC ID: 0941684179
Enrollment ID: O20220907001111
Entity NameLevel One Emergency Anna Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1285329516
PECOS PAC ID: 4486094232
Enrollment ID: O20240426003513

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. Gregory M Keelen 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
Gregory M Keelen, DO
5016 Us Hwy 75,
Denison, TX 75020-4584

Ph: (214) 433-9602		Gregory M Keelen, DO
5016 Us-75, Tmc Emergency Department,
Denison, TX 75020

Ph: (214) 433-9602

Reviews and Comments


Emergency Medicine Doctors in Denison, TX

Dr. Benjamin Jay Blake, D.O.
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 5016 S Us Highway 75, Denison, TX 75020
Phone: 903-416-2435    
Dr. Kevin Lee Thompson, MD
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1000 Memorial Dr, Denison, TX 75020
Phone: 903-416-4181    Fax: 903-416-4182
Mr. Zachary Anthony Franklin Sr., MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 1000 Memorial Dr, Denison, TX 75020
Phone: 903-416-4000    
Seungwhan Roh, MD
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 5016 Us Hwy 75, Denison, TX 75020
Phone: 903-416-4000    
Jerome Allen Lindsay Ii, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 5016 South Us Hwy 75, Denison, TX 75020
Phone: 903-416-4000    
Tyler James Nichols, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 5016 S Us Highway 75, Denison, TX 75020
Phone: 903-416-4000    
Kevin B Stacks, MD
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 864 Preston Rd, Denison, TX 75020
Phone: 903-624-6514    Fax: 903-709-0104

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.