Dr Larry A Grissom, MD - Medicare Diagnostic Radiology in Houston, TX

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Dr Larry A Grissom, MD is a medicare enrolled "Radiology - Diagnostic Radiology" physician in Houston, Texas. He went to University Of Texas Medical School At Houston and graduated in 1978 and has 46 years of diverse experience with area of expertise as Diagnostic Radiology. He is a member of the group practice Houston Northwest Radiology Assn, Singleton Associates Pa, Rose Imaging Specialists Pa and his current practice location is 800 Peakwood Dr, Suite 5e, Houston, Texas. You can reach out to his office (for appointments etc.) via phone at (281) 440-5158.

Dr Larry A Grissom is licensed to practice in Texas (license number F1605) 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 1164400644.

Contact Information

Dr Larry A Grissom, MD
800 Peakwood Dr, Suite 5e,
Houston, TX 77090-2900
(281) 440-5158
(281) 440-8549

Map and Direction




Physician's Profile

Full NameDr Larry A Grissom
GenderMale
SpecialityDiagnostic Radiology
Experience46 Years
Location800 Peakwood Dr, Houston, Texas
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:
  • Dr Larry A Grissom attended and graduated from University Of Texas Medical School At Houston in 1978
  NPI Data:
  • NPI Number: 1164400644
  • Provider Enumeration Date: 01/05/2006
  • Last Update Date: 07/29/2008
  Medicare PECOS Information:
  • PECOS PAC ID: 9931209996
  • Enrollment ID: I20071113000771

Medical Identifiers

Medical identifiers for Dr Larry A Grissom such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1164400644NPI-NPPES
1253874-03MedicaidTX

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2085R0202XRadiology - Diagnostic Radiology F1605 (Texas)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Hca Houston Healthcare TomballTomball, TXHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Houston Northwest Radiology Assn509279977527
Singleton Associates Pa6305731118681
Rose Imaging Specialists Pa751785335137

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. Dr Larry A Grissom allows following entities to bill medicare on his behalf.
Entity NameMedical Clinic Of Houston, Llp
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1972539492
PECOS PAC ID: 9234034752
Enrollment ID: O20031205000699
Entity NameRose Imaging Specialists Pa
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1164478186
PECOS PAC ID: 7517853351
Enrollment ID: O20040226001097
Entity NameSingleton Associates Pa
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1538107875
PECOS PAC ID: 6305731118
Enrollment ID: O20040315000385
Entity NameHouston Northwest Radiology Assn
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1023051851
PECOS PAC ID: 5092799775
Enrollment ID: O20040618000171

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. Dr Larry A Grissom 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
Dr Larry A Grissom, MD
800 Peakwood Dr, Suite 5e,
Houston, TX 77090-2900

Ph: (281) 440-5158		Dr Larry A Grissom, MD
800 Peakwood Dr, Suite 5e,
Houston, TX 77090-2900

Ph: (281) 440-5158

Reviews and Comments


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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.