Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

JOSHUA JAMES GRUBER M.D.
NPI 1437441904
Internal Medicine - Medical Oncology in Palo Alto, CA

Q: What is Joshua Gruber's NPI number?

The NPI number for Joshua Gruber is 1437441904. It was assigned to this individual provider in the NPPES registry on May 3, 2011.

Q: What is Joshua Gruber's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Q: When was this NPI record last updated?

The NPPES record for Joshua Gruber was last updated on August 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 days 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 May 03, 2011PECOS Enrolled

74.59/100

CMS Quality Rating

900 BLAKE WILBUR DR, PALO ALTO, CA 94304(650) 498-6004 Get Directions Write a Review

NPPES record last updated: August 19, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Aug 19, 2026, Jul 26, 2021 (2 updates tracked since 2021).

On this page

About Joshua James Gruber M.d. NPPES

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

JOSHUA JAMES GRUBER M.D. (NPI 1437441904) is an individual medical oncology provider in Palo Alto, California, licensed in Texas (T2614) and active in the NPI registry since May 2011. He is enrolled in Medicare PECOS, is affiliated with Ut Southwestern University Hospital - William P. Clements Jr., and maintains a secondary practice location in Dallas.

NPPES Registry Identity

NPI1437441904

Entity TypeIndividualMale

Primary Taxonomy207RX0202X

Provider Legal NameJOSHUA JAMES GRUBERCredential: M.D.

Location Address900 BLAKE WILBUR DRPalo Alto, CA 94304-2201

Mailing Address269 Campus DriveStanford, CA 94305-5151

Phone(650) 498-6004

Sole ProprietorNo

Medical School CMSPerelman School Of Med At The University Of PennsylvaniaGraduated 2011

Enumeration DateMay 3, 2011

Last NPPES UpdateAugust 19, 20262 updates tracked since enumeration

NPPES CertifiedAugust 19, 2026

✔ NPI 1437441904 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians

Taxonomy Code207RX0202X

Licenses✔ Licensed in TX · T2614✔ Licensed in CA · A122149

Definition

An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.

Also ListedInternal MedicineTaxonomy 207R00000X · License A122149 (CA)

900 BLAKE WILBUR DR, Palo Alto, CA 94304

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Secondary Practice Location 1

Location 16201 Harry Hines BlvdDallas, TX 75390-2200 · Phone (214) 633-5555

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.Insurance ›

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

Joshua James Gruber M.d. 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 ID3870893944

PECOS Enrollment IDI20210804001791

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 2

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.

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.

37 services12 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.

15 services11 patients

Hospital Affiliations CMS Care Compare

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

Ut Southwestern University Hospital - William P. Clements Jr.

Acute Care Hospitals · Dallas, TX

5/5 CMS rating

OwnershipGovernment - State

CMS Certification Number450044

Location6201 Harry Hines BlvdDallas, TX 75390 · Dallas County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94304 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

$206.04 typical visit price

range $70.37 – $206.04

Typical copayment $51.51 (range $17.59 – $51.51)

Most-billed visit code 99205

Established Patient

$121.77 typical visit price

range $23.96 – $169.60

Typical copayment $30.44 (range $5.99 – $42.40)

Most-billed visit code 99214

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.

74.59/100

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

Scored as part of a group practice

Quality

56.12

Promoting Interoperability

100

Improvement Activities

Cost

59.2

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.

MS. MARIANNE S OUTZEN OTR

Occupational Therapist (Hand)

900 BLAKE WILBUR DR, SUITE W1080
PALO ALTO, CA 94304

Santa Clara County (650) 723-1702

TATIANA NORMAN-BRIVET NP

Nurse Practitioner (Family)

900 BLAKE WILBUR DR, 1ST FLOOR
PALO ALTO, CA 94304

Santa Clara County (650) 498-6004

NATALIE HOWLETT

Internal Medicine

900 BLAKE WILBUR DR
PALO ALTO, CA 94304

Santa Clara County (650) 723-6961

AISHA FURQAN MS, CGC

Genetic Counselor, MS

900 BLAKE WILBUR DR
PALO ALTO, CA 94304

Santa Clara County (650) 304-6970

DR. DANIEL NAVI M.D.

Dermatology

900 BLAKE WILBUR DR
PALO ALTO, CA 94304

Santa Clara County (650) 736-2300

DR. STEVEN BINDER O.D.

Optometrist

900 BLAKE WILBUR DR, 3RD FLOOR
PALO ALTO, CA 94304

Santa Clara County (650) 723-6995

ROSANNA DUESTER PA-C

Physician Assistant

900 BLAKE WILBUR DR
PALO ALTO, CA 94304

Santa Clara County (650) 736-9578

DR. DEEPTI DIVYA GOPISETTY MD

Student in an Organized Health Care Education/Training Program

900 BLAKE WILBUR DR
PALO ALTO, CA 94304

Santa Clara County (650) 725-6079

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 Joshua Gruber's NPI number?

The NPI number for Joshua Gruber is 1437441904. It was assigned to this individual provider in the NPPES registry on May 3, 2011.

Where is Joshua Gruber located?

Joshua Gruber practices at 900 Blake Wilbur Dr, Palo Alto, CA 94304. The listed phone number is (650) 498-6004.

What is Joshua Gruber's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Joshua Gruber enrolled in Medicare?

Yes. Joshua Gruber 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.

What insurance does Joshua Gruber accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 1 other insurer list Joshua Gruber 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 Joshua Gruber affiliated with any hospitals?

According to CMS data, Joshua Gruber is affiliated with Ut Southwestern University Hospital - William P. Clements Jr..

When was this NPI record last updated?

The NPPES record for Joshua Gruber was last updated on August 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 days 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.