DR. RONALD SIERZENSKI M.D.
NPI 1861428633
Emergency Medicine in Chandler, AZ

Q: What is Ronald Sierzenski's NPI number?

The NPI number for Ronald Sierzenski is 1861428633. It was assigned to this individual provider in the NPPES registry on June 24, 2006.

Q: What is Ronald Sierzenski's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Q: When was this NPI record last updated?

The NPPES record for Ronald Sierzenski was last updated on April 22, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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 June 24, 2006PECOS EnrolledAccepts Medicare Assignment

475 S DOBSON RD, CHANDLER, AZ 85224(480) 963-4561 Get Directions Write a Review

NPPES record last updated: April 22, 2010. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Dr. Ronald Sierzenski M.d. NPPES

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

DR. RONALD SIERZENSKI M.D. (NPI 1861428633) is an individual emergency medicine provider in Chandler, Arizona, licensed in Arizona (28468) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of Jefferson Medical College Of Thomas Jefferson University (1997).

NPPES Registry Identity

NPI1861428633

Entity TypeIndividualMale

Primary Taxonomy207P00000X

Provider Legal NameDR. RONALD SIERZENSKICredential: M.D.

Location Address475 S DOBSON RDChandler, AZ 85224-5605

Mailing Address1539 E Tulsa StGilbert, AZ 85296-5554

Phone(480) 963-4561

Sole ProprietorNo

Medical School CMSJefferson Medical College Of Thomas Jefferson UniversityGraduated 1997

Enumeration DateJune 24, 2006

Last NPPES UpdateApril 22, 2010

✔ NPI 1861428633 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in AZ · 28468

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

Also ListedEmergency Medicine · Emergency Medical ServicesTaxonomy 207PE0004X · License 28468 (AZ)

Also ListedEmergency Medicine · Undersea and Hyperbaric MedicineTaxonomy 207PE0005X · License 28468 (AZ)

475 S DOBSON RD, Chandler, AZ 85224

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Other Identifiers 4

Medicare UPINH19191AZ

Medicare ID-Type UnspecifiedZ72792AZ

Medicaid537003AZ

OtherAZ0736120AZ · Bc/bs

Accepted Insurance

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

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Ronald Sierzenski 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 ID6901893619

PECOS Enrollment IDI20040426001706

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.

Areas of Expertise CMS Part B claims 5

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.

Management of oxygen chamber therapy 99183

Oxygen chamber therapy involves breathing pure oxygen in a pressurized room or tube. It's used to treat various conditions like wounds that won't heal due to diabetes or radiation injury. In this therapy, your body's tissues get more oxygen to promote healing and fight infection.

46 services17 patients

Emergency department visit with high level of medical decision making 99285

An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.

41 services40 patients

Emergency department visit with moderate level of medical decision making 99284

An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.

28 services28 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

26 services26 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

18 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85224 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

$85.89 typical visit price

range $55.44 – $168.60

Typical copayment $21.47 (range $13.86 – $42.15)

Most-billed visit code 99203

Established Patient

$98.00 typical visit price

range $17.72 – $137.41

Typical copayment $24.50 (range $4.43 – $34.35)

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.

Other Providers at the Same Location NPPES 20

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

CAROL B BRENNAN PA-C

Physician Assistant (Medical)