Gregory S Larsen, DO - Medicare in Colton, CA

Gregory S Larsen, DO is a medicare enrolled "Emergency Medicine" physician in Colton, California. His current practice location is 400 N Pepper Ave, Colton, California. You can reach out to his office (for appointments etc.) via phone at (909) 580-1000.

Gregory S Larsen is licensed to practice in California (license number 20A10521) 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 1104073709.

Contact Information

Gregory S Larsen, DO
400 N Pepper Ave,
Colton, CA 92324-1801
(909) 580-1000
Not Available

Map and Direction




Physician's Profile

Full NameGregory S Larsen
GenderMale
Speciality
Experience Years
Location400 N Pepper Ave, Colton, California
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:
  • Gregory S Larsen attended and graduated from in
  NPI Data:
  • NPI Number: 1104073709
  • Provider Enumeration Date: 08/26/2008
  • Last Update Date: 10/30/2009
  Medicare PECOS Information:
  • PECOS PAC ID:
  • Enrollment ID:

Medical Identifiers

Medical identifiers for Gregory S Larsen such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1104073709NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 20A10521 (California)Primary

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 S Larsen 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 S Larsen, DO
312 Notre Dame Rd,
Claremont, CA 91711-5136

Ph: (909) 399-3609
Gregory S Larsen, DO
400 N Pepper Ave,
Colton, CA 92324-1801

Ph: (909) 580-1000

Reviews and Comments


Emergency Medicine Doctors in Colton, CA

Eugene Lawrence Kwong, M.D
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 400 N. Pepper Avenue, Colton, CA 92324
Phone: 909-580-1400    
Gregory M. Fenati, D.O.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 400 N Pepper Ave, Colton, CA 92324
Phone: 858-344-7049    
Carol Hyeun Lee, M.D
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 400 N. Pepper Avenue, Colton, CA 92324
Phone: 909-580-1400    
Dr. Vikram Raj, D.O.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 400 N Pepper Ave Ste 107, Colton, CA 92324
Phone: 909-580-1802    
Robert Sexton Kollen, M.D
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 400 N. Pepper Avenue, Colton, CA 92324
Phone: 909-580-1400    
Leigh Elizabeth Avera, D.O.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 400 N Pepper Ave, Colton, CA 92324
Phone: 909-580-1000    
Kenneth Paul Takaki, DO
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 400 N Pepper Ave, Colton, CA 92324
Phone: 909-580-6370    

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.