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NICHOLAS S MUFF MD
NPI 1740372861
Specialist in Corona, CA

Active since September 28, 2006PECOS EnrolledAccepts Medicare Assignment
260 E ONTARIO AVE STE 101, CORONA, CA 92879(949) 490-4820(949) 490-4819 Get Directions Write a Review

NPPES record last updated: June 13, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Nicholas S Muff Md NPPES

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

NICHOLAS S MUFF MD (NPI 1740372861) is an individual specialist in Corona, California, licensed in Washington (MD00015015) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Sedro Woolley, and is a graduate of Loma Linda University School Of Medicine (1972).

NPPES Registry Identity

NPI1740372861
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameNICHOLAS S MUFFCredential: MD
Location Address260 E ONTARIO AVE STE 101Corona, CA 92879-3508
Mailing AddressP O Box 977Coupeville, WA 98239 · (360) 678-4071 · Fax (360) 678-6014
Phone(949) 490-4820
Fax(949) 490-4819
Sole ProprietorNo
Medical School CMSLoma Linda University School Of MedicineGraduated 1972
Enumeration DateSeptember 28, 2006
Last NPPES UpdateJune 13, 2025
NPPES CertifiedJune 13, 2025
✔ NPI 1740372861 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in WA · MD00015015
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
Also ListedRadiology · Radiation OncologyTaxonomy 2085R0001X · License G25544 (CA)
260 E ONTARIO AVE STE 101, Corona, CA 92879
Open in Google Maps ↗

Secondary Practice Location 1

Location 12000 HOSPITAL DRIVESEDRO WOOLLEY, WA 98284 · Phone (360) 856-7270

Other Identifiers 3

Other05660WA · Regence Bs
Other13895001WA · Group Health
Medicaid1160381WA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska, Providence Health Plan.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

Nicholas S Muff Md 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 ID244281533
PECOS Enrollment IDI20050203000558, I20180215001324, I20240115000103
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

6

Medicare enrollment records show Nicholas Muff reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Compassionate Cancer Care Radiation Diagnostics Group Inc
Same address
Radiation Oncology
260 E ONTARIO AVE STE 101
Corona, CA 92879
  • Reassigned Medicare billing, California enrollment
  • 2 clinicians in this Medicare group
NPI 1720234081 (951) 371-2411
Stephen William Doggett, M.D. PA
22 mi
Radiation Oncology
20341 SW BIRCH ST STE 330
Newport Beach, CA 92660
  • Reassigned Medicare billing, California, Nevada and Washington enrollments
  • Medicare enrollment name: Stephen William Doggett MD PA
  • 10 clinicians in this Medicare group
NPI 1427281666 (949) 490-4820
Dermatology & Laser Center Of San Diego
90 mi
Dermatology
344 F ST STE 200
Chula Vista, CA 91910
  • Reassigned Medicare billing, California enrollment
  • 11 clinicians in this Medicare group
NPI 1457396178 (619) 476-1200
Minarets Medical Group, Inc.
242 mi
Dermatology
1340 W HERNDON AVE, STE 101
Fresno, CA 93711
  • Reassigned Medicare billing, California enrollment
  • 11 clinicians in this Medicare group
NPI 1063626265 (559) 438-1324
Folsom Dermatology
387 mi
Dermatology
1745 CREEKSIDE DR
Folsom, CA 95630
  • Reassigned Medicare billing, California enrollment
  • 10 clinicians in this Medicare group
NPI 1669731899 (916) 983-2302
Dermahealth Dermatology, PLLC
859 mi
Dermatology
1305 FOWLER STREET, SUITE 1C
Richland, WA 99352
  • Reassigned Medicare billing, Washington enrollment
  • 10 clinicians in this Medicare group
NPI 1881835171 (509) 783-2004

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.

High dose rate electronic brachytherapy, external 0394T
High Dose Rate Electronic Brachytherapy (HDR EBT) is a precise form of radiation therapy. It involves placing a tiny source of radiation directly into the area needing treatment. This allows a high dose of radiation to be delivered directly to the area, while reducing exposure to surrounding healthy tissues.
37 services34 patients
Use of externally generated heat to increase temperature of cancer cell, heating to depths 4.0 cm or less 77600
This procedure involves using a source of heat from outside the body to raise the temperature of cancer cells. The heat is applied up to a depth of 4.0 cm beneath the skin surface. The increase in temperature can help in the treatment of the cancer.
34 services34 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.
29 services29 patients
New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more 99202
This service involves an initial visit to the doctor's office or other outpatient setting. It typically lasts between 15-29 minutes. The doctor will review your medical history, conduct a physical examination, and discuss your health concerns. It's a chance to establish your health baseline and address any immediate medical issues.
28 services28 patients

Other Providers at the Same Location NPPES 5

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

HUSSEIN MERZA MD
Internal Medicine (Hematology & Oncology)
260 E ONTARIO AVE STE 101
CORONA, CA 92879
Riverside County (951) 371-2411
TARYN ELIZABETH SOMMERS PA
Physician Assistant
260 E ONTARIO AVE STE 101
CORONA, CA 92879
Riverside County (951) 371-2411
COMPASSIONATE CANCER CARE RADIATION DIAGNOSTICS GROUP INC
Radiology (Radiation Oncology)
260 E ONTARIO AVE STE 101
CORONA, CA 92879
Riverside County (951) 371-2411
LOS ANGELES HEMATOLOGY ONCOLOGY MEDICAL GROUP
Internal Medicine (Hematology & Oncology)
260 E ONTARIO AVE STE 101
CORONA, CA 92879
Riverside County (951) 284-0177
COMPASSIONATE CANCER CARE RADIATION/DIAGNOSTICS GROUP, INC.
Radiologic Technologist (Radiation Therapy)
260 E ONTARIO AVE STE 101
CORONA, CA 92879
Riverside County (951) 371-2411

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 Nicholas Muff's NPI number?

The NPI number for Nicholas Muff is 1740372861. It was assigned to this individual provider in the NPPES registry on September 28, 2006.

Where is Nicholas Muff located?

Nicholas Muff practices at 260 E Ontario Ave Ste 101, Corona, CA 92879. The listed phone number is (949) 490-4820.

What is Nicholas Muff's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Nicholas Muff enrolled in Medicare?

Yes. Nicholas Muff 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 Nicholas Muff's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nicholas Muff reassigns Medicare benefits to 6 organizations: Compassionate Cancer Care Radiation Diagnostics Group Inc (Corona, CA), Stephen William Doggett, M.D. PA (Newport Beach, CA), Dermatology & Laser Center Of San Diego (Chula Vista, CA), Minarets Medical Group, Inc. (Fresno, CA), Folsom Dermatology (Folsom, CA) and 1 more organization, listed in the Medicare section above. 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 Nicholas Muff's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Nicholas Muff accept?

Health plans from Premera Blue Cross Blue Shield of Alaska and Providence Health Plan list Nicholas Muff 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 Nicholas Muff was last updated on June 13, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.