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CASSANDRA LEIGH THOMAS M.D.
NPI 1376787416
Internal Medicine - Hematology & Oncology in Ventura, CA

Active since April 20, 2009PECOS EnrolledAccepts Medicare Assignment
300 HILLMONT AVE STE 501, VENTURA, CA 93003(805) 652-6218 Get Directions Write a Review

NPPES record last updated: November 17, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 17, 2025, Apr 16, 2020 (2 updates tracked since 2020).

About Cassandra Leigh Thomas M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CASSANDRA LEIGH THOMAS M.D. (NPI 1376787416) is an individual hematology & oncology provider in Ventura, California, licensed in California (C184675) and active in the NPI registry since April 2009. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2009).

NPPES Registry Identity

NPI1376787416
Entity TypeIndividualFemale
Primary Taxonomy207RH0003X
Provider Legal NameCASSANDRA LEIGH THOMASCredential: M.D.
Location Address300 HILLMONT AVE STE 501Ventura, CA 93003-1651
Mailing Address300 Hillmont Ave Ste 501Ventura, CA 93003-1651 · (805) 652-6218
Phone(805) 652-6218
Sole ProprietorNo
Medical School CMSOtherGraduated 2009
Enumeration DateApril 20, 2009
Last NPPES UpdateNovember 17, 20252 updates tracked since enumeration
NPPES CertifiedNovember 17, 2025
✔ NPI 1376787416 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in CA · C184675
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Also ListedInternal MedicineTaxonomy 207R00000X · License MD446164 (PA)
Also ListedInternal Medicine · Medical OncologyTaxonomy 207RX0202X · License 25MA10384800 (NJ)
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
300 HILLMONT AVE STE 501, Ventura, CA 93003
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1925 Chestnut St Ste 320APhiladelphia, PA 19107-4216 · Phone (215) 955-8874
Location 2900 Medical Center Dr Ste 200Sewell, NJ 08080-2358 · Phone (856) 557-7900

Other Identifiers 2

Medicaid102756150PA
Medicaid0311057NJ

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Cassandra Leigh Thomas M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2466608542
PECOS Enrollment IDI20240408000130
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Cassandra Thomas reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

County Of Ventura
Same address
Federally Qualified Health Center (FQHC)
300 HILLMONT AVE STE 302
Ventura, CA 93003
  • Reassigned Medicare billing, California enrollment
  • 710 clinicians in this Medicare group
NPI 1619118569 (805) 652-6255
Community Memorial Health System
0.3 mi
Gynecologic Oncology
2900 LOMA VISTA RD STE 205
Ventura, CA 93003
  • Reassigned Medicare billing, California enrollment
  • 267 clinicians in this Medicare group
NPI 1619453982 (805) 642-4830

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
246 services62 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
82 services40 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
42 services42 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
41 services30 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93003 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$185.36 typical visit price
range $62.32 – $185.36
Typical copayment $46.34 (range $15.58 – $46.34)
Most-billed visit code 99205
Established Patient
$108.74 typical visit price
range $20.68 – $151.85
Typical copayment $27.18 (range $5.17 – $37.96)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Supplies for maintenance of non-insulin drug infusion catheter, per week (list drugs separately) A4221
DME-Other DME · category DE017N
1 supplier38 claims38 services$18.46 avg. paid by Medicare
Infusion supplies for external drug infusion pump, per cassette or bag (list drugs separately) A4222
DME-Medical/Surgical Supplies · category DA000N
1 supplier38 claims38 services$35.93 avg. paid by Medicare
Ambulatory infusion pump, single or multiple channels, electric or battery operated, with administrative equipment, worn by patient E0781
DME-Other DME · category DE000N
1 supplier12 claims12 services$179.51 avg. paid by Medicare
Injection, fluorouracil, 500 mg J9190
Treatment-Chemotherapy · category RH002N
1 supplier38 claims333 services$1.60 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. BETH ANN MOLINEUX M.S., PH.D.
Marriage & Family Therapist
300 HILLMONT AVE STE 501
VENTURA, CA 93003
Ventura County (805) 652-6218

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Cassandra Thomas's NPI number?

The NPI number for Cassandra Thomas is 1376787416. It was assigned to this individual provider in the NPPES registry on April 20, 2009.

Where is Cassandra Thomas located?

Cassandra Thomas practices at 300 Hillmont Ave Ste 501, Ventura, CA 93003. The listed phone number is (805) 652-6218.

What is Cassandra Thomas's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Cassandra Thomas enrolled in Medicare?

Yes. Cassandra Thomas is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Cassandra Thomas's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cassandra Thomas reassigns Medicare benefits to 2 organizations: County Of Ventura (Ventura, CA) and Community Memorial Health System (Ventura, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Cassandra Thomas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Cassandra Thomas accept?

Health plans from Oscar Health list Cassandra Thomas as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Cassandra Thomas was last updated on November 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.