NAM WOO CHO MDPHD
NPI 1811420052
Radiology - Radiation Oncology in San Francisco, CA

Q: What is Nam Woo Cho's NPI number?

The NPI number for Nam Woo Cho is 1811420052. It was assigned to this individual provider in the NPPES registry on April 5, 2017.

Q: What is Nam Woo Cho'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 Nam Woo Cho was last updated on August 5, 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.

Active since April 05, 2017PECOS EnrolledAccepts Medicare Assignment

74.46/100

CMS Quality Rating

1600 DIVISADERO ST, STE H-1031, SAN FRANCISCO, CA 94115(415) 353-7175 Get Directions Write a Review

NPPES record last updated: August 5, 2022. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Aug 5, 2022, Jun 21, 2018 (2 updates tracked since 2018).

On this page

About Nam Woo Cho Mdphd NPPES

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

NAM WOO CHO MDPHD (NPI 1811420052) is an individual radiation oncology provider in San Francisco, California, licensed in California (A160331) and active in the NPI registry since April 2017. He is enrolled in Medicare PECOS, maintains a secondary practice location in San Francisco, and is a graduate of Perelman School Of Med At The University Of Pennsylvania (2017).

NPPES Registry Identity

NPI1811420052

Entity TypeIndividualMale

Primary Taxonomy2085R0001X

Provider Legal NameNAM WOO CHOCredential: MDPHD

Location Address1600 DIVISADERO ST, STE H-1031San Francisco, CA 94115

Mailing Address1600 Divisadero Street, Suite H-1031San Francisco, CA 94115

Phone(415) 353-7175

Sole ProprietorYes

Medical School CMSPerelman School Of Med At The University Of PennsylvaniaGraduated 2017

Enumeration DateApril 5, 2017

Last NPPES UpdateAugust 5, 20222 updates tracked since enumeration

NPPES CertifiedAugust 5, 2022

✔ NPI 1811420052 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 · A160331

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.

1600 DIVISADERO ST, San Francisco, CA 94115

Open in Google Maps ↗

Secondary Practice Location 1

Location 1450 Stanyan StSan Francisco, CA 94117-1019 · Phone (415) 668-1000

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

Nam Woo Cho Mdphd 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 ID4082949953

PECOS Enrollment IDI20220706003414

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

Medicare enrollment records show Nam Woo Cho reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

University Of California San Francisco

1.8 mi

Surgery

400 PARNASSUS AVE, MCB 300
San Francisco, CA 94143

Reassigned Medicare billing, California enrollment
5,645 clinicians in this Medicare group

NPI 1346329380 (415) 353-2161

Ucsf Medical Group Business Services

1.8 mi

Internal Medicine

400 PARNASSUS AVE
San Francisco, CA 94122

Reassigned Medicare billing, California enrollment
5,544 clinicians in this Medicare group

NPI 1477624104 (415) 353-2808

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 11

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.

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.

171 services26 patients

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.

152 services13 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.

30 services26 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.

28 services26 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.

26 services25 patients

Obtaining respiratory data needed to develop the optimal radiation treatment 77293

Obtaining respiratory data is vital for optimal radiation treatment. This involves tracking your breathing patterns to ensure the precise delivery of radiation to the target area, minimizing damage to healthy tissue. It's a non-invasive process and contributes to effective treatment.

25 services25 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.

21 services19 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.

18 services16 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.

15 services12 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.

13 services13 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.

13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94115 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. PATRICIA J MORAN PSY

Psychologist

1600 DIVISADERO ST
SAN FRANCISCO, CA 94115

San Francisco County (415) 353-9745

DR. ERIC KAORU NAKAKURA MD

Surgery

1600 DIVISADERO ST
SAN FRANCISCO, CA 94115

San Francisco County (415) 353-9846

DR. HOPE S. RUGO MD

Internal Medicine (Hematology)

1600 DIVISADERO ST
SAN FRANCISCO, CA 94115

San Francisco County (415) 353-7070

RONALD BALASSANIAN MD

Pathology (Anatomic Pathology & Clinical Pathology)

1600 DIVISADERO ST, UCSF/MT. ZION MEDICAL CENTER, ROOM 200 FNA CLINIC
SAN FRANCISCO, CA 94115

San Francisco County (415) 514-6642

DR. JOHN W PARK MD

Internal Medicine (Medical Oncology)

1600 DIVISADERO ST, 2ND FLOOR, BOX 1710
SAN FRANCISCO, CA 94115

San Francisco County (415) 353-7070

MARYLOU LOUISE ERNEST NP

Nurse Practitioner

1600 DIVISADERO ST
SAN FRANCISCO, CA 94115

San Francisco County (415) 353-7035

DR. RICHARD M. KRIEG MD

Radiology (Therapeutic Radiology)

1600 DIVISADERO ST
SAN FRANCISCO, CA 94115

San Francisco County (415) 353-7175

DR. I-CHOW JOE HSU M.D.

Radiology (Radiation Oncology)

1600 DIVISADERO ST
SAN FRANCISCO, CA 94115

San Francisco County (415) 353-7175

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 Nam Woo Cho's NPI number?

The NPI number for Nam Woo Cho is 1811420052. It was assigned to this individual provider in the NPPES registry on April 5, 2017.

Where is Nam Woo Cho located?

Nam Woo Cho practices at 1600 Divisadero St Ste H-1031, San Francisco, CA 94115. The listed phone number is (415) 353-7175.

What is Nam Woo Cho's specialty?

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

Is Nam Woo Cho enrolled in Medicare?

Yes. Nam Woo Cho 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 Nam Woo Cho's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nam Woo Cho reassigns Medicare benefits to 2 organizations: University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, CA). 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 Nam Woo Cho'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 Nam Woo Cho was last updated on August 5, 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.