Dr Mark Yarwood Johnson, MD - Medicare Gastroenterology in Chula Vista, CA

Dr Mark Yarwood Johnson, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Chula Vista, California. He went to George Washington University School Of Medicine and graduated in 1973 and has 51 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice On Call Specialists Medical Group Of San Diego Inc and his current practice location is 480 4th Ave, Suite 506, Chula Vista, California. You can reach out to his office (for appointments etc.) via phone at (619) 585-0313.

Dr Mark Yarwood Johnson is licensed to practice in California (license number G28163) 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 1861421372.

Contact Information

Dr Mark Yarwood Johnson, MD
480 4th Ave, Suite 506,
Chula Vista, CA 91910-4410
(619) 585-0313
(619) 585-0037

Map and Direction




Physician's Profile

Full NameDr Mark Yarwood Johnson
GenderMale
SpecialityGastroenterology
Experience51 Years
Location480 4th Ave, Chula Vista, 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:
  • Dr Mark Yarwood Johnson attended and graduated from George Washington University School Of Medicine in 1973
  NPI Data:
  • NPI Number: 1861421372
  • Provider Enumeration Date: 06/30/2006
  • Last Update Date: 10/04/2007
  Medicare PECOS Information:
  • PECOS PAC ID: 7517016405
  • Enrollment ID: I20090526000280

Medical Identifiers

Medical identifiers for Dr Mark Yarwood Johnson such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1861421372NPI-NPPES
A43635OtherCAUPIN
100001724OtherCAMEDICARE RAILROAD
00G281630MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology G28163 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Scripps Mercy HospitalSan diego, CAHospital
Sharp Coronado Hospital And Hlthcr CtrCoronado, CAHospital

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 Mark Yarwood Johnson allows following entities to bill medicare on his behalf.
Entity NameScripps Health
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1275899072
PECOS PAC ID: 9234033853
Enrollment ID: O20031124000822
Entity NameEmergency And Acute Care Medical Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1437103942
PECOS PAC ID: 9537108279
Enrollment ID: O20050502000734
Entity NameOn Call Specialists Medical Group Of San Diego Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1962175836
PECOS PAC ID: 7911395231
Enrollment ID: O20211019001466

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 Mark Yarwood Johnson 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 Mark Yarwood Johnson, MD
65 Catspaw Cpe,
Coronado, CA 92118-3221

Ph: (619) 585-0313
Dr Mark Yarwood Johnson, MD
480 4th Ave, Suite 506,
Chula Vista, CA 91910-4410

Ph: (619) 585-0313

Reviews and Comments


Internal Medicine Doctors in Chula Vista, CA

Dr. Perry V Montoya, M.D
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Medicare: Accepting Medicare Assignments
Practice Location: 525 3rd Ave, Chula Vista, CA 91910
Phone: 858-499-2600    Fax: 619-585-4353
John S Videen, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 752 Medical Center Ct, Suite 302, Chula Vista, CA 91911
Phone: 619-421-3361    Fax: 619-656-8936
Daniel Cepin, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 890 Eastlake Pkwy, Suite 205, Chula Vista, CA 91914
Phone: 619-482-0300    Fax: 619-482-0959
Kenneth Burton Johnson, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 769 Medical Center Ct, Suite 202, Chula Vista, CA 91911
Phone: 619-482-8430    Fax: 619-482-8005
Dr. Michael Sonbaty, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 1400 E Palomar St, Chula Vista, CA 91913
Phone: 858-499-2616    
Sara Khandan, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 835 Third Ave Ste A, Chula Vista, CA 91911
Phone: 619-425-7755    Fax: 619-425-2138
Alejandro G Hinojosa-valencia, MD
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 629 Third Ave Ste A, Chula Vista, CA 91910
Phone: 619-422-6158    Fax: 619-422-2019

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).

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