MATTHEW BLAKE WARREN MD
NPI 1124412275
Internal Medicine - Critical Care Medicine in Riverside, CA

Active since March 26, 2015PECOS EnrolledAccepts Medicare Assignment
73.04/100
CMS Quality Rating
4234 RIVERWALK PKWY STE 230, RIVERSIDE, CA 92505(951) 781-3672 Get Directions Write a Review

NPPES record last updated: March 23, 2022. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Matthew Blake Warren Md NPPES

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

MATTHEW BLAKE WARREN MD (NPI 1124412275) is an individual critical care medicine provider in Riverside, California, licensed in California (A170797) and active in the NPI registry since March 2015. He is enrolled in Medicare PECOS and is a graduate of Other (2014).

NPPES Registry Identity

NPI1124412275
Entity TypeIndividualMale
Primary Taxonomy207RC0200X
Provider Legal NameMATTHEW BLAKE WARRENCredential: MD
Location Address4234 RIVERWALK PKWY STE 230Riverside, CA 92505-3312
Mailing AddressPo Box 60219Irvine, CA 92602-6007 · (951) 781-3672
Sole ProprietorNo
Medical School CMSOtherGraduated 2014
Enumeration DateMarch 26, 2015
Last NPPES UpdateMarch 23, 2022
NPPES CertifiedMarch 23, 2022
NPI 1124412275 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyInternal Medicine · Critical Care MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RC0200X
License Licensed in CA · A170797
Definition

An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.

Also ListedInternal Medicine · Pulmonary DiseaseTaxonomy 207RP1001X · License A170797 (CA)
4234 RIVERWALK PKWY STE 230, Riverside, CA 92505

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

Matthew Blake Warren 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 ID6901101427
PECOS Enrollment IDI20210615000000
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 3

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.

Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
47 services28 patients
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 10 minutes 99307
A follow-up nursing facility visit per day typically lasts about 10 minutes. This service involves a healthcare professional checking on your health status, answering any questions you may have, and monitoring your progress. This routine check ensures your recovery is on track and any concerns are addressed promptly.
45 services16 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
20 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92505 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
$136.04 typical visit price
range $59.60 – $179.42
Typical copayment $34.01 (range $14.90 – $44.85)
Most-billed visit code 99204
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
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.

73.04/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality56.75
Promoting Interoperability83
Improvement Activities40
Cost34.22

Referred Medical Equipment & Supplies CMS DME claims

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

Home ventilator, any type, used with non-invasive interface, (e.g., mask, chest shell) E0466
DME-Other DME · category DE005N
1 supplier12 claims12 services$784.18 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.

Physician Assistant (Medical)
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Physician Assistant
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Physician Assistant
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Physician Assistant
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Internal Medicine (Critical Care Medicine)
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Internal Medicine (Pulmonary Disease)
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Internal Medicine (Critical Care Medicine)
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505
Physician Assistant (Medical)
4234 RIVERWALK PKWY STE 230
RIVERSIDE, CA 92505

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 Matthew Warren's NPI number?

The NPI number for Matthew Warren is 1124412275. It was assigned to this individual provider in the NPPES registry on March 26, 2015.

Where is Matthew Warren located?

Matthew Warren practices at 4234 Riverwalk Pkwy Ste 230, Riverside, CA 92505. The listed phone number is (951) 781-3672.

What is Matthew Warren's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

Is Matthew Warren enrolled in Medicare?

Yes. Matthew Warren 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.

When was this NPI record last updated?

The NPPES record for Matthew Warren was last updated on March 23, 2022. NPI Profile syncs with the weekly NPPES data releases published by CMS.