JOSEPH CHARLES POEN MD
NPI 1972585941
Radiology - Radiation Oncology in Greenbrae, CA

Q: What is Joseph Poen's NPI number?

The NPI number for Joseph Poen is 1972585941. It was assigned to this individual provider in the NPPES registry on November 16, 2005.

Q: What is Joseph Poen'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 Joseph Poen was last updated on December 8, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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 November 16, 2005PECOS EnrolledAccepts Medicare Assignment

1350 S ELISEO DR, #100, GREENBRAE, CA 94904(209) 342-2300(209) 324-4240 Get Directions Write a Review

NPPES record last updated: December 8, 2008. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Joseph Charles Poen Md NPPES

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

JOSEPH CHARLES POEN MD (NPI 1972585941) is an individual radiation oncology provider in Greenbrae, California, licensed in California (G66706) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS and is a graduate of University Of California, Geffen School Of Medicine (1988).

NPPES Registry Identity

NPI1972585941

Entity TypeIndividualMale

Primary Taxonomy2085R0001X

Provider Legal NameJOSEPH CHARLES POENCredential: MD

Location Address1350 S ELISEO DR, #100Greenbrae, CA 94904-2011

Mailing Address4301 Northstar WayModesto, CA 95356-9262 · (209) 342-2300 · Fax (209) 524-4240

Phone(209) 342-2300

Fax(209) 324-4240

Sole ProprietorNo

Medical School CMSUniversity Of California, Geffen School Of MedicineGraduated 1988

Enumeration DateNovember 16, 2005

Last NPPES UpdateDecember 8, 2008

✔ NPI 1972585941 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 · G66706

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.

1350 S ELISEO DR, Greenbrae, CA 94904

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Other Identifiers 5

Medicaid00G667060CA

Medicare PIN00G667062CA

Other00G667060CA · Blue Shield

Medicare UPINF67075

Medicare ID-Type Unspecified00G667060CA

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

Joseph Charles Poen 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 ID6709975170

PECOS Enrollment IDI20071207000770

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 Joseph Poen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Marin Cancer Care Inc

Same address

Hematology & Oncology

1350 S ELISEO DR, SUITE 200
Greenbrae, CA 94904

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

NPI 1629370499 (415) 925-5000

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 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.

Ct guidance for insertion of radiation therapy fields 77014

CT guidance for insertion of radiation therapy fields involves using a CT scan to accurately map the area of your body where radiation will be applied. This ensures the radiation targets only the necessary area, minimizing impact to healthy tissues.

1,043 services66 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.

541 services94 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.

423 services102 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.

217 services71 patients

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.

149 services32 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.

95 services90 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.

84 services67 patients

Special radiation treatment 77470

Special radiation treatment is a medical procedure that uses high-energy rays to destroy or damage cancer cells. It's a targeted approach that aims to minimize harm to healthy tissues. The treatment duration varies based on individual health conditions.

73 services70 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.

72 services62 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.

68 services63 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.

67 services60 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 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.

61 services61 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.

39 services37 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.

36 services32 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.

33 services31 patients

Management of cranial lesion surgery using radiation over multiple sessions 77435

This procedure involves using targeted radiation to treat a lesion in the brain over several sessions. The radiation destroys the abnormal cells, helping to control or eliminate the lesion. It's a non-invasive treatment, meaning no surgical cuts are made.

23 services23 patients

Simple radiation therapy planning 77261

Simple radiation therapy planning is a process to determine the exact area on your body where the radiation will be directed. It involves imaging studies like CT scans to precisely target the disease, minimizing harm to healthy tissue. It's a crucial step in your treatment journey.

22 services21 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 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.

21 services18 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.

18 services18 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.

14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94904 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

$202.63 typical visit price

range $69.07 – $202.63

Typical copayment $50.65 (range $17.26 – $50.65)

Most-billed visit code 99205

Established Patient

$85.00 typical visit price

range $23.44 – $166.64

Typical copayment $21.25 (range $5.86 – $41.66)

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.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

1 supplier12 claims12 services$14.99 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

1 supplier12 claims12 services$69.20 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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. LEAH MORTON KELLEY M.D.

Surgery (Surgical Oncology)

1350 S ELISEO DR, SUITE 210
GREENBRAE, CA 94904

Marin County (415) 925-5035

DR. ALBERT A VARNER MD

Internal Medicine (Gastroenterology)

1350 S ELISEO DR, STE 130
GREENBRAE, CA 94904

Marin County (415) 925-6900

BOBBIE HEAD M.D., PHD

Specialist

1350 S ELISEO DR, SUITE 200
GREENBRAE, CA 94904

Marin County (415) 925-5000

PRIMA MEDICAL FOUNDATION

Surgery

1350 S ELISEO DR, #210
GREENBRAE, CA 94904

Marin County (415) 925-5035

MS. LINDA RUTH CLEM PA

Physician Assistant

1350 S ELISEO DR
GREENBRAE, CA 94904

Marin County (415) 925-3590

MARIN RADIATION ONCOLOGY MEDICAL GROUP

Radiology (Radiation Oncology)

1350 S ELISEO DR, 100
GREENBRAE, CA 94904

Marin County (209) 342-2300

RIPPLE SHARMA M.D.

Specialist

1350 S ELISEO DR, 130
GREENBRAE, CA 94904

Marin County (415) 925-6900

DR. LAURY RAPPAPORT PH.D.

Marriage & Family Therapist

1350 S ELISEO DR, SUITE 120
GREENBRAE, CA 94904

Marin County (415) 461-9000

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 Joseph Poen's NPI number?

The NPI number for Joseph Poen is 1972585941. It was assigned to this individual provider in the NPPES registry on November 16, 2005.

Where is Joseph Poen located?

Joseph Poen practices at 1350 S Eliseo Dr #100, Greenbrae, CA 94904. The listed phone number is (209) 342-2300.

What is Joseph Poen's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Is Joseph Poen enrolled in Medicare?

Yes. Joseph Poen 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 organization bills Medicare for Joseph Poen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Joseph Poen reassigns Medicare benefits to Marin Cancer Care Inc (Greenbrae, CA). 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 Joseph Poen'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 Joseph Poen was last updated on December 8, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.