1. Home
  2. Directory
  3. Idaho
  4. Boise
  5. Dermatology
  6. NPI Profile

DR. LEON WILLIAM NOWIERSKI M.D.
NPI 1376610048
Dermatology in Boise, ID

Active since November 29, 2006PECOS Enrolled
0/100
CMS Quality Rating
100 WARM SPRINGS AVE, SUITE A, BOISE, ID 83712(208) 343-5910(208) 384-8562 Get Directions Write a Review

NPPES record last updated: August 26, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Leon William Nowierski M.d. NPPES

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

DR. LEON WILLIAM NOWIERSKI M.D. (NPI 1376610048) is an individual dermatology provider in Boise, Idaho, licensed in Idaho (M4341) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, is affiliated with St Luke's Regional Medical Center, and maintains a secondary practice location in Boise.

NPPES Registry Identity

NPI1376610048
Entity TypeIndividualMale
Primary Taxonomy207N00000X
Provider Legal NameDR. LEON WILLIAM NOWIERSKICredential: M.D.
Location Address100 WARM SPRINGS AVE, SUITE ABoise, ID 83712-6243
Mailing Address100 Warm Springs Ave, Suite ABoise, ID 83712-6243 · (208) 343-5910 · Fax (208) 384-8562
Phone(208) 343-5910
Fax(208) 384-8562
Sole ProprietorYes
Medical School CMSOregon Health Sciences University School Of MedicineGraduated 1975
Enumeration DateNovember 29, 2006
Last NPPES UpdateAugust 26, 2022
NPPES CertifiedAugust 26, 2022
✔ NPI 1376610048 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
License✔ Licensed in ID · M4341
Definition
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
Also ListedDermatology · MOHS-Micrographic SurgeryTaxonomy 207ND0101X · License M4341 (ID)
Also ListedDermatology · Procedural DermatologyTaxonomy 207NS0135X · License M4341 (ID)
100 WARM SPRINGS AVE, Boise, ID 83712
Open in Google Maps ↗

Secondary Practice Location 1

Location 1500 W Fort St, # 111Boise, ID 83702 · Phone (208) 422-1000 · Fax (208) 422-1319

Other Identifiers 3

Other43414ID · Blue Cross Of Idaho
Other000010021230ID · Blue Shield Of Idaho
Medicaid002586300ID

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Moda Health Plan, Inc., PacificSource Health Plans, Select Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Leon William Nowierski M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID7719002179
PECOS Enrollment IDI20100909000370
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 Reassignment

Medicare enrollment records show Leon Nowierski reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

L. William D. Nowierski, M.D. PA
Same address
Medical Specialty
100 WARM SPRINGS AVE, STE. A
Boise, ID 83712
  • Reassigned Medicare billing, Idaho enrollment
  • Medicare enrollment name: L William D Nowierski MD PA
NPI 1710166004 (208) 343-5910

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 8

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.

Destruction of precancer skin growth, 2-14 growths 17003
This procedure involves removing 2-14 precancerous skin growths. The growths are treated to prevent them from potentially developing into skin cancer. The process is safe, with minimal discomfort, and promotes healthier skin.
518 services123 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.
503 services262 patients
Destruction of precancer skin growth, 1 growth 17000
"Destruction of precancer skin growth" is a procedure that eliminates a single precancerous skin growth. This is done to prevent it from developing into skin cancer. The growth may be removed using various methods such as cryotherapy (freezing), laser therapy, or topical medications.
274 services191 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.
133 services114 patients
Destruction of skin growth, 1-14 growths 17110
"Destruction of skin growth" refers to a procedure where 1-14 abnormal skin growths are removed. This is done using methods such as freezing, burning, or laser therapy. It helps prevent the growth from causing discomfort or turning into a more serious condition.
107 services82 patients
Biopsy of related skin growth, first growth 11102
A biopsy of a skin growth involves taking a small sample of the growth to examine it under a microscope. This helps determine if the growth is harmful. The procedure is typically quick, with minimal discomfort. It's a crucial step in ensuring your skin's health.
37 services35 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

St Luke's Regional Medical Center

Acute Care Hospitals · Boise, ID
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number130006
Location190 East Bannock StreetBoise, ID 83712 · Ada County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 83712 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
$81.13 typical visit price
range $52.44 – $160.17
Typical copayment $20.28 (range $13.11 – $40.04)
Most-billed visit code 99203
Established Patient
$65.77 typical visit price
range $16.68 – $130.93
Typical copayment $16.44 (range $4.17 – $32.73)
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.

0/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored
Quality0
Improvement Activities0

Other Providers at the Same Location NPPES 4

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

BENJAMIN JOSEPH KARSTEN MD
Surgery
100 WARM SPRINGS AVE, STE B
BOISE, ID 83712
Ada County (208) 381-2222
DR. J. CHRIS CHRISTOPHER KANTARIAN MD
Colon & Rectal Surgery
100 WARM SPRINGS AVE, STE B
BOISE, ID 83712
Ada County (208) 381-6930
L. WILLIAM D. NOWIERSKI, M.D. PA
Clinic/Center (Medical Specialty)
100 WARM SPRINGS AVE, STE. A
BOISE, ID 83712
Ada County (208) 343-5910
RENEE A. BOURQUARD MD
Surgery
100 WARM SPRINGS AVE, STE B
BOISE, ID 83712
Ada County (208) 381-6930

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 Leon Nowierski's NPI number?

The NPI number for Leon Nowierski is 1376610048. It was assigned to this individual provider in the NPPES registry on November 29, 2006.

Where is Leon Nowierski located?

Leon Nowierski practices at 100 Warm Springs Ave Suite A, Boise, ID 83712. The listed phone number is (208) 343-5910.

What is Leon Nowierski's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

Is Leon Nowierski enrolled in Medicare?

Yes. Leon Nowierski is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Leon Nowierski's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Leon Nowierski reassigns Medicare benefits to L. William D. Nowierski, M.D. PA (Boise, ID). The 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 Leon Nowierski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Leon Nowierski accept?

Health plans from Moda Health Plan, Inc., PacificSource Health Plans and Select Health list Leon Nowierski 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.

Is Leon Nowierski affiliated with any hospitals?

According to CMS data, Leon Nowierski is affiliated with St Luke's Regional Medical Center.

When was this NPI record last updated?

The NPPES record for Leon Nowierski was last updated on August 26, 2022. 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.