THOMAS M. GUERRERO MD, PHD
NPI 1932281334
Radiology - Radiation Oncology in Oroville, CA

Q: What is Thomas Guerrero's NPI number?

The NPI number for Thomas Guerrero is 1932281334. It was assigned to this individual provider in the NPPES registry on October 19, 2006.

Q: What is Thomas Guerrero's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Q: When was this NPI record last updated?

The NPPES record for Thomas Guerrero was last updated on July 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.

Active since October 19, 2006PECOS EnrolledAccepts Medicare Assignment

73.34/100

CMS Quality Rating

2809 OLIVE HWY STE 110, OROVILLE, CA 95966(530) 538-5600 Get Directions Write a Review

NPPES record last updated: July 22, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 25, 2022, Jul 21, 2022, Oct 21, 2020 and 1 more (4 updates tracked since 2015).

On this page

About Thomas M. Guerrero Md, Phd NPPES

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

THOMAS M. GUERRERO MD, PHD (NPI 1932281334) is an individual radiation oncology provider in Oroville, California, licensed in California (A66756) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Chico, and is a graduate of University Of California, Geffen School Of Medicine (1997).

NPPES Registry Identity

NPI1932281334

Entity TypeIndividualMale

Primary Taxonomy2085R0001X

Provider Legal NameTHOMAS M. GUERREROCredential: MD, PHD

Location Address2809 OLIVE HWY STE 110Oroville, CA 95966-6132

Mailing Address69 Country View LnOroville, CA 95966-9409 · (832) 496-1667 · Fax (530) 691-5922

Phone(530) 538-5600

Sole ProprietorNo

Medical School CMSUniversity Of California, Geffen School Of MedicineGraduated 1997

Enumeration DateOctober 19, 2006

Last NPPES UpdateJuly 22, 20254 updates tracked since enumeration

NPPES CertifiedJuly 22, 2025

✔ NPI 1932281334 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0001X

Licenses✔ Licensed in CA · A66756✔ Licensed in TX · L5350✔ Licensed in MI · 4301106275

Definition

A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.

2809 OLIVE HWY STE 110, Oroville, CA 95966

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Secondary Practice Location 1

Location 11700 EsplanadeChico, CA 95926-3315 · Phone (530) 691-5920 · Fax (530) 691-5922

Other Identifiers 2

Medicaid152172601TX

Medicaid1932281334MI

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

Thomas M. Guerrero Md, Phd 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 ID2769552751

PECOS Enrollment IDI20220902001023

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

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

Orohealth Corporation A Non Profit Healthcare System

0.2 mi

Family Medicine

2767 OLIVE HWY
Oroville, CA 95966

Reassigned Medicare billing, California enrollment
267 clinicians in this Medicare group

NPI 1013933167 (530) 533-8500

Paragon Chico Medical Group, Inc

23 mi

Radiation Oncology

1700 ESPLANADE
Chico, CA 95926

Reassigned Medicare billing, California enrollment
15 clinicians in this Medicare group

NPI 1528527181 (813) 385-6847

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 16

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.

Ct guidance for insertion of radiation therapy fields 77014

CT guidance for insertion of radiation therapy fields involves using a CT scan to accurately map the area of your body where radiation will be applied. This ensures the radiation targets only the necessary area, minimizing impact to healthy tissues.

463 services56 patients

Calculation of radiation therapy dose 77300

Radiation therapy dose calculation is a process to determine the exact amount of radiation needed to treat a specific area in the body. This calculation helps ensure the treatment is effective while minimizing harm to healthy tissues. It's a key part of planning your radiation therapy.

298 services86 patients

Radiation treatment management, 5 treatment sessions 77427

Radiation treatment management involves a series of 5 sessions where targeted radiation is used to destroy or shrink cancer cells in your body. Each session is carefully planned to maximize effectiveness while minimizing harm to healthy tissues. You may experience side effects which will be closely monitored and managed for your comfort.

267 services76 patients

Design and construction of complex radiation treatment device 77334

The design and construction of a complex radiation treatment device is a process where a specialized instrument is created. This device targets harmful cells with high-energy rays to destroy or damage them, while minimizing impact on healthy cells. This aids in treating conditions like cancer.

177 services87 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

144 services81 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.

69 services69 patients

Design and construction of radiation treatment device for high precision radiation therapy 77338

A radiation treatment device is custom-made for each patient to target cancer cells with high precision. It's designed to focus radiation on the tumor, sparing healthy tissue. This process ensures effective therapy while minimizing side effects.

66 services48 patients

Complex radiation therapy planning 77263

Complex radiation therapy planning is a process to determine the most effective way to deliver radiation to a specific area in your body. It involves detailed imaging to map your body's structure, allowing for precise targeting of cancer cells while sparing healthy tissue.

63 services57 patients

Obtaining data needed to develop the optimal radiation treatment, 3 or more treatment areas or any number of treatment areas where special treatment is involved 77290

This procedure involves collecting necessary data to plan the best radiation treatment. It may cover 3 or more areas or any area requiring special attention. Data collection includes imaging scans and tests to understand the disease's extent and to tailor a precise, effective treatment plan.

54 services44 patients

Special radiation therapy planning 77331

Special radiation therapy planning is a process to determine the most effective way to deliver radiation treatment. It involves imaging studies to map your body's internal structure, which helps in targeting the exact area needing treatment while sparing healthy tissues.

54 services41 patients

Obtaining data needed to develop the optimal radiation treatment, 1 treatment area 77280

This procedure involves gathering essential information to create the best radiation treatment plan for a specific area. It includes scanning the treatment area and using this data to calculate the precise dose of radiation needed to target the disease effectively, while sparing healthy tissue.

53 services43 patients

High precision radiation therapy planning 77301

High precision radiation therapy planning involves detailed mapping of your body to target cancer cells accurately. Advanced imaging techniques help identify the exact location of the tumor, minimizing harm to healthy tissues. This personalized approach enhances effectiveness and reduces side effects.

53 services46 patients

3d radiation therapy planning 77295

3D radiation therapy planning is a procedure that uses computer imaging to map out the area needing treatment. This ensures the radiation targets the disease precisely, while minimizing exposure to surrounding healthy tissues. It's a key step in preparing for effective radiation therapy.

27 services24 patients

Radiation treatment management, 1-2 treatment sessions 77431

Radiation treatment involves directing high-energy rays at specific areas of the body to destroy cancer cells. In 1-2 sessions, a machine delivers these rays while you lie still. It is non-invasive, painless, and each session lasts about 15-30 minutes.

13 services12 patients

Special radiation treatment 77470

Special radiation treatment is a medical procedure that uses high-energy rays to destroy or damage cancer cells. It's a targeted approach that aims to minimize harm to healthy tissues. The treatment duration varies based on individual health conditions.

11 services11 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95966 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

$176.60 typical visit price

range $58.87 – $176.60

Typical copayment $44.15 (range $14.71 – $44.15)

Most-billed visit code 99205

Established Patient

$73.16 typical visit price

range $19.28 – $144.60

Typical copayment $18.29 (range $4.82 – $36.15)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

73.34/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

36.89

Promoting Interoperability

100

Improvement Activities

Cost

57.82

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 Thomas Guerrero's NPI number?

The NPI number for Thomas Guerrero is 1932281334. It was assigned to this individual provider in the NPPES registry on October 19, 2006.

Where is Thomas Guerrero located?

Thomas Guerrero practices at 2809 Olive Hwy Ste 110, Oroville, CA 95966. The listed phone number is (530) 538-5600.

What is Thomas Guerrero's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Is Thomas Guerrero enrolled in Medicare?

Yes. Thomas Guerrero 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 Thomas Guerrero's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Guerrero reassigns Medicare benefits to 2 organizations: Orohealth Corporation A Non Profit Healthcare System (Oroville, CA) and Paragon Chico Medical Group, Inc (Chico, 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 Thomas Guerrero's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Thomas Guerrero was last updated on July 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.