Jennifer Loeb Sisco, MD
Internal Medicine Physician · Oxnard, CA
Jennifer Loeb Sisco, MD is an internal medicine physician with a practice address in Oxnard, California, and NPI 1366869471, issued on Mar 26, 2014. Check the license (California A148364, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jennifer Loeb Sisco
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A148364 CA
Self-reported in NPPES; status is on the state search - Practice location
- St. John's Regional Medical Center -1600 N Rose Avenue, Oxnard, CA 93030
- Phone
- (000) 000-0000
- Enumerated
- Mar 26, 2014
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (805) 485-3025
- Medicare enrollment
- Enrolled (PECOS I20180831002214); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 2014
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Jennifer Loeb Sisco in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A148364Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 98.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $168.24
2 payments; by number, the most common kind was food and beverage; the largest payer was Ceribell, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- West Coast Critical Care Specialists, Inc.Oxnard, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jennifer Loeb Sisco among 17,696 internal medicine physician records in California
Jennifer Loeb Sisco, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 74% of them.
- NPI issued2014 · 74% of these records are older, 24% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2014 · median 2004 among the 11,065 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
44 internal medicine physician records list a practice address in Oxnard
They are 44 of the 3,211 NPPES records with a practice address in Oxnard, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Oxnard → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Charles Avery, M.D.Oxnard, CA 930301891735486
- Richard Brand, MDOxnard, CA 930301770527608
- Dorothea Clayton, M.D.Oxnard, CA 930301053596395
- Romany Demian, M.D.Oxnard, CA 930301043232085
- Shiu Man Lee, M.D.Oxnard, CA 930301144397555
- Bernard McDermott, D.O.Oxnard, CA 930301821101841
- Myo Min, M.DOxnard, CA 930301407176670
- Robert Nguyen, MDOxnard, CA 930301780775718
Common questions
What is Jennifer Loeb Sisco, MD's NPI number?
Jennifer Loeb Sisco, MD's National Provider Identifier (NPI) is 1366869471, issued on Mar 26, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer Loeb Sisco, MD located?
The NPPES record lists a practice address at St. John's Regional Medical Center -1600 N Rose Avenue, Oxnard, CA, 93030. Phone: (000) 000-0000. Providers update this record themselves, so call before visiting.
How can I verify Jennifer Loeb Sisco, MD's license?
NPPES lists California license number A148364, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Jennifer Loeb Sisco, MD's MIPS final score?
The 2023 MIPS final score is 98.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.