DR. NICOLAS DEMETRIOS PRIONAS MD, PHD
NPI 1972840361
Radiology - Radiation Oncology in San Francisco, CA

Q: What is Nicolas Prionas's NPI number?

The NPI number for Nicolas Prionas is 1972840361. It was assigned to this individual provider in the NPPES registry on January 7, 2013.

Q: What is Nicolas Prionas'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 Nicolas Prionas was last updated on September 24, 2019. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since January 07, 2013PECOS EnrolledAccepts Medicare Assignment

74.46/100

CMS Quality Rating

400 PARNASSUS AVE, SAN FRANCISCO, CA 94143(415) 353-2497 Get Directions Write a Review

NPPES record last updated: September 24, 2019. Verified against the NPPES registry weekly; last sync: July 19, 2026.

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About Dr. Nicolas Demetrios Prionas Md, Phd NPPES

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

DR. NICOLAS DEMETRIOS PRIONAS MD, PHD (NPI 1972840361) is an individual radiation oncology provider in San Francisco, California, licensed in California (A138608) and active in the NPI registry since January 2013. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of University Of California, Davis School Of Medicine (2014).

NPPES Registry Identity

NPI1972840361

Entity TypeIndividualMale

Primary Taxonomy2085R0001X

Provider Legal NameDR. NICOLAS DEMETRIOS PRIONASCredential: MD, PHD

Location Address400 PARNASSUS AVESan Francisco, CA 94143-2202

Mailing Address1600 Divisadero St Bsmt LevelSan Francisco, CA 94143-3010 · (415) 353-9807

Phone(415) 353-2497

Sole ProprietorNo

Medical School CMSUniversity Of California, Davis School Of MedicineGraduated 2014

Enumeration DateJanuary 7, 2013

Last NPPES UpdateSeptember 24, 2019

✔ NPI 1972840361 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0001X

License✔ Licensed in CA · A138608

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.

400 PARNASSUS AVE, San Francisco, CA 94143

Open in Google Maps ↗

Secondary Practice Locations 2

Location 14610 X StSacramento, CA 95817-2200 · Phone (916) 762-8993

Location 239101 Civic Center DrFremont, CA 94538-5817 · Phone (510) 796-7212

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. Nicolas Demetrios Prionas 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 ID8921339375

PECOS Enrollment IDI20191016000273

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 20

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.

Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy G6002

Stereoscopic x-ray guidance is a technique used in radiation therapy. It involves taking multiple X-ray images from different angles to create a 3D picture of the area to be treated. This helps accurately pinpoint the exact location for radiation delivery, ensuring the therapy is as effective as possible.

288 services48 patients

Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session G6015

Intensity-modulated radiation therapy (IMRT) is a type of cancer treatment. It uses advanced technology to manipulate photon beams of radiation to conform to the shape of a tumor. IMRT allows for the radiation dose to conform more precisely to the three-dimensional shape of the tumor by modulatingâ€”or controllingâ€”the intensity of the radiation beam. This can result in better tumor control and less harm to healthy tissue.

230 services44 patients

Continuing radiation therapy consultation per week 77336

Continuing radiation therapy consultation per week involves regular meetings with your healthcare team. These sessions help monitor your progress, manage side effects, and adjust your treatment plan if necessary. It's a key part of ensuring the effectiveness of your radiation therapy.

147 services54 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.

143 services23 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.

113 services44 patients

Calculation of radiation therapy dose 77300

109 services34 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.

90 services29 patients

Radiation treatment management, 5 treatment sessions 77427

51 services30 patients

Design and construction of complex radiation treatment device 77334

43 services14 patients

New patient office or other outpatient visit, 60-74 minutes 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.

43 services43 patients

Design and construction of simple radiation treatment device 77332

A simple radiation treatment device is designed and built to target specific areas in your body with high energy rays. This process is carefully planned to ensure that the radiation accurately reaches the area needing treatment, while minimizing exposure to healthy tissues.

35 services35 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.

34 services34 patients

Radiation treatment delivery,3 or more separate treatment areas, custom blocking, tangential ports, wedges, rotational beam, compensators, electron beam; 6-10 mev G6012

Radiation therapy involves directing high-energy particles to destroy cancer cells. The technique targets 3 or more areas, using custom blocks for precise focus. Tangential ports, wedges, and rotational beams adjust the radiation's path, while compensators balance radiation dose. Electron beam therapy with 6-10 mev energy is used for deep-seated tumors.

33 services11 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.

28 services21 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.

24 services24 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.

24 services12 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.

23 services23 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.

17 services16 patients

Established patient office or other outpatient visit, 40-54 minutes 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

14 services13 patients

New patient office or other outpatient visit, 60-74 minutes 99205

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94143 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

$202.35 typical visit price

range $69.00 – $202.35

Typical copayment $50.58 (range $17.25 – $50.58)

Most-billed visit code 99205

Established Patient

$84.91 typical visit price

range $23.44 – $166.46

Typical copayment $21.22 (range $5.86 – $41.61)

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.

74.46/100

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

Scored as part of a group practice

Promoting Interoperability

Improvement Activities

Cost

46.68

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.

DR. KATHERINE A JULIAN MD

Internal Medicine