Dr Elsa Cassandra Santillana, DO - Medicare Internal Medicine in Orange, CA

Dr Elsa Cassandra Santillana, DO is a medicare enrolled "Internal Medicine - Pulmonary Disease" physician in Orange, California. Her current practice location is 333 City Blvd W Ste 400, Orange, California. You can reach out to her office (for appointments etc.) via phone at (714) 456-6870.

Dr Elsa Cassandra Santillana is licensed to practice in California (license number 21075) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1194187781.

Contact Information

Dr Elsa Cassandra Santillana, DO
333 City Blvd W Ste 400,
Orange, CA 92868-2994
(714) 456-6870
Not Available

Map and Direction




Physician's Profile

Full NameDr Elsa Cassandra Santillana
GenderFemale
SpecialityInternal Medicine - Pulmonary Disease
Location333 City Blvd W Ste 400, Orange, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1194187781
  • Provider Enumeration Date: 03/23/2016
  • Last Update Date: 06/29/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 7618357849
  • Enrollment ID: I20220706002822

Medical Identifiers

Medical identifiers for Dr Elsa Cassandra Santillana such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1194187781NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RP1001XInternal Medicine - Pulmonary Disease DO.2807 (Alabama)Secondary
207RP1001XInternal Medicine - Pulmonary Disease 2807 (Alabama)Secondary
207RP1001XInternal Medicine - Pulmonary Disease 21075 (California)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. Dr Elsa Cassandra Santillana allows following entities to bill medicare on her behalf.
Entity NameUniversity Of Alabama Health Services Foundation, Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1093768723
PECOS PAC ID: 1951213107
Enrollment ID: O20031105000261

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 Elsa Cassandra Santillana 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 Elsa Cassandra Santillana, DO
333 City Blvd W Ste 400,
Orange, CA 92868-2994

Ph: () -
Dr Elsa Cassandra Santillana, DO
333 City Blvd W Ste 400,
Orange, CA 92868-2994

Ph: (714) 456-6870

Reviews and Comments


Internal Medicine Doctors in Orange, CA

Michael Cheng, DO
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Phone: 714-456-7110    
Harry Nguyen, D.O.
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Millie Arora,
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Phone: 714-456-5691    Fax: 714-456-8874
Dr. Sarah Jeanette Ettinger, M.D.
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Practice Location: 101 The City Dr S, Orange, CA 92868
Phone: 714-456-5135    
Dr. Antonio Halais Frangieh, MD, MPH
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Phone: 714-456-7890    
Dr. Andy Yen-tang Lee, MD
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Practice Location: 101 The City Dr S, Orange, CA 92868
Phone: 714-456-7890    
Dr. Jesse John Goitia Jr., M.D.
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Medicare: Medicare Enrolled
Practice Location: 101 The City Dr S, Orange, CA 92868
Phone: 714-880-7812    

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.

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