Mark Carlton Rounsaville, MD - Medicare Radiology in Nicasio, CA

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Mark Carlton Rounsaville, MD is a medicare enrolled "Radiology - Radiation Oncology" physician in Nicasio, California. His current practice location is 45 Los Pinos, Nicasio, California. You can reach out to his office (for appointments etc.) via phone at (415) 662-2669.

Mark Carlton Rounsaville is licensed to practice in California (license number A39060) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1033100284.

Contact Information

Mark Carlton Rounsaville, MD
45 Los Pinos,
Nicasio, CA 94946
(415) 662-2669
(415) 662-2669

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Physician's Profile

Full NameMark Carlton Rounsaville
GenderMale
SpecialityRadiology - Radiation Oncology
Location45 Los Pinos, Nicasio, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1033100284
  • Provider Enumeration Date: 11/04/2005
  • Last Update Date: 05/17/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 7416020789
  • Enrollment ID: I20080718000644

Medical Identifiers

Medical identifiers for Mark Carlton Rounsaville such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1033100284NPI-NPPES
00A390600OtherCABLUE SHIELD
00A390600MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2085R0001XRadiology - Radiation Oncology A39060 (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. Mark Carlton Rounsaville allows following entities to bill medicare on his behalf.
Entity NameNorthern California Radiation Therapists & Oncologists Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1720069891
PECOS PAC ID: 9638124977
Enrollment ID: O20050318000677

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. Mark Carlton Rounsaville 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
Mark Carlton Rounsaville, MD
45 Los Pinos,
Nicasio, CA 94946

Ph: (415) 662-2669		Mark Carlton Rounsaville, MD
45 Los Pinos,
Nicasio, CA 94946

Ph: (415) 662-2669

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Radiology Doctors in Nicasio, CA


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.