Dr Jeffrey J Hallazgo, MD - Medicare Emergency Medicine in Fenton, MO

Dr Jeffrey J Hallazgo, MD is a medicare enrolled "Internal Medicine" physician in Fenton, Missouri. He went to University Of Missouri, Kansas City, School Of Medicine and graduated in 1984 and has 40 years of diverse experience with area of expertise as Emergency Medicine. He is a member of the group practice Mercy Clinic East Communities and his current practice location is 714 Gravois Rd, Suite 100, Fenton, Missouri. You can reach out to his office (for appointments etc.) via phone at (636) 326-6100.

Dr Jeffrey J Hallazgo is licensed to practice in Missouri (license number R4G27) 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 1073538302.

Contact Information

Dr Jeffrey J Hallazgo, MD
714 Gravois Rd, Suite 100,
Fenton, MO 63026-7723
(636) 326-6100
(636) 326-6110



Physician's Profile

Full NameDr Jeffrey J Hallazgo
GenderMale
SpecialityEmergency Medicine
Experience40 Years
Location714 Gravois Rd, Fenton, Missouri
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 Jeffrey J Hallazgo attended and graduated from University Of Missouri, Kansas City, School Of Medicine in 1984
  NPI Data:
  • NPI Number: 1073538302
  • Provider Enumeration Date: 07/13/2006
  • Last Update Date: 05/10/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 0345248019
  • Enrollment ID: I20061114000182

Medical Identifiers

Medical identifiers for Dr Jeffrey J Hallazgo such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1073538302NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine R4G27 (Missouri)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Mercy Hospital St LouisSaint louis, MOHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Mercy Clinic East Communities7214827922491

News Archive

Newly published research examines association between CKD and CYP24

Cytochroma today announced the publication of new data from studies in a preclinical model indicating that chronic kidney disease is associated with markedly increased expression of the vitamin D catabolic enzyme, CYP24, which contributes to vitamin D insufficiency and resistance to vitamin D therapy. Parallel analysis of kidney biopsies obtained from CKD patients confirmed abnormal CYP24 expression in human disease as well.

New research will play a major role in improving the future of breast cancer treatment

Cancer specialists at University of East Anglia have discovered that several 'ADAMTS' genes are turned off in breast cancer compared to normal breast tissue, while others are switched on. These genes could be targets for the development of 'smart' drugs tailored to treat individual patients' tumours.

Consumption of medications for treatment of insomnia or anxiety increases mortality risk

Taking medications to treat insomnia and anxiety increases mortality risk by 36%, according to a study conducted by Genevi-ve Belleville, a professor at Universit- Laval's School of Psychology. The details of this study are published in the latest edition of the Canadian Journal of Psychiatry.

ISU researchers discover protein that appears to predict memory loss, brain atrophy in Alzheimer's patients

Iowa State University researchers have identified a protein essential for building memories that appears to predict the progression of memory loss and brain atrophy in Alzheimer's patients.

Read more Medical News

› Verified 5 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. Dr Jeffrey J Hallazgo allows following entities to bill medicare on his behalf.
Entity NameMercy Hospitals East Communities
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1427098169
PECOS PAC ID: 1658276811
Enrollment ID: O20031209000789

News Archive

Newly published research examines association between CKD and CYP24

Cytochroma today announced the publication of new data from studies in a preclinical model indicating that chronic kidney disease is associated with markedly increased expression of the vitamin D catabolic enzyme, CYP24, which contributes to vitamin D insufficiency and resistance to vitamin D therapy. Parallel analysis of kidney biopsies obtained from CKD patients confirmed abnormal CYP24 expression in human disease as well.

New research will play a major role in improving the future of breast cancer treatment

Cancer specialists at University of East Anglia have discovered that several 'ADAMTS' genes are turned off in breast cancer compared to normal breast tissue, while others are switched on. These genes could be targets for the development of 'smart' drugs tailored to treat individual patients' tumours.

Consumption of medications for treatment of insomnia or anxiety increases mortality risk

Taking medications to treat insomnia and anxiety increases mortality risk by 36%, according to a study conducted by Genevi-ve Belleville, a professor at Universit- Laval's School of Psychology. The details of this study are published in the latest edition of the Canadian Journal of Psychiatry.

ISU researchers discover protein that appears to predict memory loss, brain atrophy in Alzheimer's patients

Iowa State University researchers have identified a protein essential for building memories that appears to predict the progression of memory loss and brain atrophy in Alzheimer's patients.

Read more Medical News

› Verified 5 days ago

Entity NameMercy Clinic East Communities
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1851335228
PECOS PAC ID: 7214827922
Enrollment ID: O20070521000006

News Archive

Newly published research examines association between CKD and CYP24

Cytochroma today announced the publication of new data from studies in a preclinical model indicating that chronic kidney disease is associated with markedly increased expression of the vitamin D catabolic enzyme, CYP24, which contributes to vitamin D insufficiency and resistance to vitamin D therapy. Parallel analysis of kidney biopsies obtained from CKD patients confirmed abnormal CYP24 expression in human disease as well.

New research will play a major role in improving the future of breast cancer treatment

Cancer specialists at University of East Anglia have discovered that several 'ADAMTS' genes are turned off in breast cancer compared to normal breast tissue, while others are switched on. These genes could be targets for the development of 'smart' drugs tailored to treat individual patients' tumours.

Consumption of medications for treatment of insomnia or anxiety increases mortality risk

Taking medications to treat insomnia and anxiety increases mortality risk by 36%, according to a study conducted by Genevi-ve Belleville, a professor at Universit- Laval's School of Psychology. The details of this study are published in the latest edition of the Canadian Journal of Psychiatry.

ISU researchers discover protein that appears to predict memory loss, brain atrophy in Alzheimer's patients

Iowa State University researchers have identified a protein essential for building memories that appears to predict the progression of memory loss and brain atrophy in Alzheimer's patients.

Read more Medical News

› Verified 5 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. Dr Jeffrey J Hallazgo 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 Jeffrey J Hallazgo, MD
12680 Olive Blvd Ste 100,
Creve Coeur, MO 63141-6322

Ph: (314) 251-8900
Dr Jeffrey J Hallazgo, MD
714 Gravois Rd, Suite 100,
Fenton, MO 63026-7723

Ph: (636) 326-6100

News Archive

Newly published research examines association between CKD and CYP24

Cytochroma today announced the publication of new data from studies in a preclinical model indicating that chronic kidney disease is associated with markedly increased expression of the vitamin D catabolic enzyme, CYP24, which contributes to vitamin D insufficiency and resistance to vitamin D therapy. Parallel analysis of kidney biopsies obtained from CKD patients confirmed abnormal CYP24 expression in human disease as well.

New research will play a major role in improving the future of breast cancer treatment

Cancer specialists at University of East Anglia have discovered that several 'ADAMTS' genes are turned off in breast cancer compared to normal breast tissue, while others are switched on. These genes could be targets for the development of 'smart' drugs tailored to treat individual patients' tumours.

Consumption of medications for treatment of insomnia or anxiety increases mortality risk

Taking medications to treat insomnia and anxiety increases mortality risk by 36%, according to a study conducted by Genevi-ve Belleville, a professor at Universit- Laval's School of Psychology. The details of this study are published in the latest edition of the Canadian Journal of Psychiatry.

ISU researchers discover protein that appears to predict memory loss, brain atrophy in Alzheimer's patients

Iowa State University researchers have identified a protein essential for building memories that appears to predict the progression of memory loss and brain atrophy in Alzheimer's patients.

Read more News

› Verified 5 days ago


Internal Medicine Doctors in Fenton, MO

Dr. Gregorius Resuma Penilla, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1345 Smizer Mill Rd Ste 1100, Fenton, MO 63026
Phone: 636-496-5040    
Dr. Stephanie Jean Becker-koepke, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1011 Bowles Ave Ste G50, Fenton, MO 63026
Phone: 636-496-4640    
Dr. Mansoor Ul Haq, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1011 Bowles Ave Ste G50, Fenton, MO 63026
Phone: 636-496-4640    
Dr. Abdul Rehman Rishi, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1345 Smizer Mill Rd Ste 1100, Fenton, MO 63026
Phone: 636-496-5022    
Timothy James Pratt, M.D.
Internal Medicine
Medicare: May Accept Medicare Assignments
Practice Location: 1011 Bowles Avenue, Suite 121, Fenton, MO 63026
Phone: 314-766-2066    Fax: 636-326-1802
Edward Reh, M.D.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 1345 Smizer Mill Rd Ste 1100, Fenton, MO 63026
Phone: 636-496-5022    

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