THOMAS JOSEPH RYDZ M.D.
NPI 1184781536
Surgery in Eureka, CA

Q: What is Thomas Rydz's NPI number?

The NPI number for Thomas Rydz is 1184781536. It was assigned to this individual provider in the NPPES registry on January 3, 2007.

Q: What is Thomas Rydz's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Q: When was this NPI record last updated?

The NPPES record for Thomas Rydz was last updated on November 10, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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 January 03, 2007PECOS EnrolledAccepts Medicare Assignment

2321 HARRISON AVE, EUREKA, CA 95501(707) 445-3660(707) 476-8431 Get Directions Write a Review

NPPES record last updated: November 10, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 10, 2021, Mar 29, 2021 (2 updates tracked since 2021).

On this page

About Thomas Joseph Rydz M.d. NPPES

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

THOMAS JOSEPH RYDZ M.D. (NPI 1184781536) is an individual surgery provider in Eureka, California, licensed in California (G71695) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of University Of California, Geffen School Of Medicine (1985).

NPPES Registry Identity

NPI1184781536

Entity TypeIndividualMale

Primary Taxonomy208600000X

Provider Legal NameTHOMAS JOSEPH RYDZCredential: M.D.

Location Address2321 HARRISON AVEEureka, CA 95501-3216

Mailing Address2321 Harrison AveEureka, CA 95501-3216 · (707) 445-3660 · Fax (707) 476-8431

Phone(707) 445-3660

Fax(707) 476-8431

Sole ProprietorNo

Medical School CMSUniversity Of California, Geffen School Of MedicineGraduated 1985

Enumeration DateJanuary 3, 2007

Last NPPES UpdateNovember 10, 20212 updates tracked since enumeration

NPPES CertifiedNovember 10, 2021

✔ NPI 1184781536 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in CA · G71695

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

2321 HARRISON AVE, Eureka, CA 95501

Open in Google Maps ↗

Other Identifiers 1

Medicaid00G716950CA

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 Joseph Rydz 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 ID9032280375

PECOS Enrollment IDI20080614000067

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 Rydz reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

North Coast Surgical Specialists

Same address

Surgery

2321 HARRISON AVE
Eureka, CA 95501

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

NPI 1326246828 (707) 445-3660

Providence Medical Foundation

0.3 mi

Surgery

2752 HARRISON AVE, SUITE A
Eureka, CA 95501

Reassigned Medicare billing, California enrollment
1,699 clinicians in this Medicare group

NPI 1477790517 (707) 268-0190

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 17

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.

Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito G0500

Moderate sedation is a method where a physician uses medication to help you relax during a gastrointestinal endoscopy. An independent trained observer will be present to monitor your vital signs and ensure your safety throughout the procedure. It's a common and safe practice.

71 services70 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

70 services68 patients

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

60 services57 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.

53 services53 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.

49 services41 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.

37 services33 patients

Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk G0121

Colorectal cancer screening, such as a colonoscopy, is a preventive measure to detect early signs of cancer in the large intestine. For individuals not at high risk, it's typically recommended at age 50. A small, flexible tube with a camera is used to examine your colon. It's a safe, effective way to catch issues early.

37 services37 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

35 services33 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

32 services32 patients

Insertion of central venous tube with port (5 years or older) 36561

A central venous tube with port is a small, flexible tube inserted into a large vein, usually in the chest. It allows for easy administration of medication, fluids, or blood products over a long period. A port is attached under the skin for easy access. It's safe for individuals aged 5 and above.

23 services23 patients

Fluoroscopic guidance for insertion or removal of central vein access device 77001

Fluoroscopic guidance for central vein access device insertion or removal is a procedure where a special X-ray, called a fluoroscope, is used to help accurately place or remove a device in a central vein. This device aids in delivering medications or collecting blood samples.

22 services22 patients

Colorectal cancer screening; colonoscopy on individual at high risk G0105

Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.

21 services21 patients

Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43235

This procedure, known as an upper endoscopy, involves inserting a thin, flexible tube with a camera down the throat to examine the esophagus, stomach, and upper small bowel. It helps diagnose conditions like ulcers or inflammation.

20 services17 patients

Diagnostic exam of large bowel using a flexible endoscope 45378

This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.

17 services16 patients

Repair of groin hernia using an endoscope 49650

This procedure involves the use of an endoscope, a thin tube with a camera, to repair a hernia in the groin area. The surgeon makes small incisions, inserts the endoscope, and uses special tools to fix the hernia. This minimally invasive technique often results in quicker recovery times.

17 services17 patients

Repair of groin hernia (5 years or older) 49505

Repair of a groin hernia is a procedure aimed at fixing an abnormal bulge that can occur in the area between your abdomen and thigh. This condition happens when tissue pushes through a weak spot in your lower abdominal wall. The repair procedure returns this tissue back to its proper place.

13 services13 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95501 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

$90.32 typical visit price

range $58.87 – $176.60

Typical copayment $22.58 (range $14.71 – $44.15)

Most-billed visit code 99203

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.

Other Providers at the Same Location NPPES 9

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

KATHRYN STOLLMEYER PA-C

Physician Assistant

2321 HARRISON AVE
EUREKA, CA 95501

Humboldt County (707) 445-3660

AMBER EVON HOFFMAN FNP

Nurse Practitioner (Family)

2321 HARRISON AVE
EUREKA, CA 95501

Humboldt County (707) 443-2248

ELESHA L HERNANDEZ RN

Registered Nurse

2321 HARRISON AVE
EUREKA, CA 95501

Humboldt County (707) 443-2248

MICHAEL A. PALMER, M.D., F.A.C.S. A MEDICAL CORPORATION

Surgery (Vascular Surgery)

2321 HARRISON AVE
EUREKA, CA 95501

Humboldt County (707) 442-4175

NORTH COAST SURGICAL SPECIALISTS

Surgery

2321 HARRISON AVE
EUREKA, CA 95501

Humboldt County (707) 445-3660

DR. JOHN ARTHUR VANSPEYBROECK M.D.

Surgery

2321 HARRISON AVE
EUREKA, CA 95501

Humboldt County (707) 443-2248

DR. HUY TRAN TRIEU M.D.

Surgery

2321 HARRISON AVE, NORTH COAST SURGICAL SPECIALISTS
EUREKA, CA 95501

Humboldt County (707) 443-2248

MICHAEL ANTHONY PALMER M.D.

Surgery

2321 HARRISON AVE
EUREKA, CA 95501

Humboldt County (707) 445-3660

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 Rydz's NPI number?

The NPI number for Thomas Rydz is 1184781536. It was assigned to this individual provider in the NPPES registry on January 3, 2007.

Where is Thomas Rydz located?

Thomas Rydz practices at 2321 Harrison Ave, Eureka, CA 95501. The listed phone number is (707) 445-3660.

What is Thomas Rydz's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Thomas Rydz enrolled in Medicare?

Yes. Thomas Rydz 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 Rydz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Rydz reassigns Medicare benefits to 2 organizations: North Coast Surgical Specialists (Eureka, CA) and Providence Medical Foundation (Eureka, 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 Rydz'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 Rydz was last updated on November 10, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.