DR. BRIAN JOSEPH MCGUINNESS M.D.
NPI 1891870770
Colon & Rectal Surgery in Walnut Creek, CA

Q: What is Brian Mcguinness's NPI number?

The NPI number for Brian Mcguinness is 1891870770. It was assigned to this individual provider in the NPPES registry on October 26, 2006.

Q: What is Brian Mcguinness's specialty?

The primary specialty registered for this NPI is Colon & Rectal Surgery with taxonomy code 208C00000X.

Q: When was this NPI record last updated?

The NPPES record for Brian Mcguinness was last updated on February 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months 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 October 26, 2006PECOS Enrolled

80.36/100

CMS Quality Rating

365 LENNON LN, STE. 290, WALNUT CREEK, CA 94598(925) 274-9000(925) 274-9004 Get Directions Write a Review

NPPES record last updated: February 26, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

On this page

About Dr. Brian Joseph Mcguinness M.d. NPPES

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

DR. BRIAN JOSEPH MCGUINNESS M.D. (NPI 1891870770) is an individual colon & rectal surgery provider in Walnut Creek, California, licensed in California (A83195) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of Tulane University School Of Medicine (1995).

NPPES Registry Identity

NPI1891870770

Entity TypeIndividualMale

Primary Taxonomy208C00000X

Provider Legal NameDR. BRIAN JOSEPH MCGUINNESSCredential: M.D.

Location Address365 LENNON LN, STE. 290Walnut Creek, CA 94598-5910

Mailing Address365 Lennon Ln, Ste. 290Walnut Creek, CA 94598-5910 · (925) 274-9000 · Fax (925) 274-9004

Phone(925) 274-9000

Fax(925) 274-9004

Sole ProprietorNo

Medical School CMSTulane University School Of MedicineGraduated 1995

Enumeration DateOctober 26, 2006

Last NPPES UpdateFebruary 26, 2025

NPPES CertifiedFebruary 26, 2025

✔ NPI 1891870770 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyColon & Rectal SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208C00000X

License✔ Licensed in CA · A83195

Definition

A colon and rectal surgeon is trained to diagnose and treat various diseases of the intestinal tract, colon, rectum, anal canal and perianal area by medical and surgical means. This specialist also deals with other organs and tissues (such as the liver, urinary and female reproductive system) involved with primary intestinal disease.

365 LENNON LN, Walnut Creek, CA 94598

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Brian Joseph Mcguinness M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID7012072010

PECOS Enrollment IDI20090206000418

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 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.

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.

75 services51 patients

Diagnostic exam of anus using an endoscope 46600

This procedure involves using a thin, flexible instrument called an endoscope to examine the anal area. It helps detect any abnormal conditions or issues. It's a safe, routine exam performed by a healthcare professional.

69 services60 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.

42 services36 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

40 services40 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

38 services20 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.

36 services36 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.

36 services36 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

22 services19 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

17 services17 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

16 services15 patients

Diagnostic exam of rectum and lower large bowel using an endoscope 45300

This procedure, known as a sigmoidoscopy, involves using a thin, flexible instrument called an endoscope to examine your lower large bowel and rectum. This helps in identifying any abnormalities or issues that could affect your digestive health.

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94598 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

$104.51 typical visit price

range $69.00 – $202.35

Typical copayment $26.12 (range $17.25 – $50.58)

Most-billed visit code 99203

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.

80.36/100

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

Scored as part of a group practice

Quality

72.85

Improvement Activities

Cost

55.1

Referred Medical Equipment & Supplies CMS DME claims 3

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

Ostomy skin barrier, with flange (solid, flexible or accordion), without built-in convexity, 4 x 4 inches or smaller, each A4414

DME-Orthotic Devices · category DF010N

3 suppliers12 claims240 services$4.62 avg. paid by Medicare

Ostomy pouch, drainable; for use on barrier with non-locking flange, with filter (2 piece system), each A4425

DME-Orthotic Devices · category DF010N

3 suppliers11 claims230 services$3.46 avg. paid by Medicare

Adhesive remover, wipes, any type, each A4456

DME-Medical/Surgical Supplies · category DA000N

4 suppliers11 claims575 services$0.23 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 19

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. TERILYN ANN VOEGTLE APRN, BC

Nurse Practitioner (Adult Health)

365 LENNON LN, SUITE 210
WALNUT CREEK, CA 94598

Contra Costa County (925) 944-1110

KONARK SHARMA M.D.

Internal Medicine (Infectious Disease)

365 LENNON LN, 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 947-2334

INFECTIOUS DISEASE DOCTORS MEDICAL GROUP APC

Internal Medicine (Infectious Disease)

365 LENNON LN, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 947-2334

DR. MIRA LIM M.D.

Ophthalmology

365 LENNON LN, STE 210
WALNUT CREEK, CA 94598

Contra Costa County (925) 947-0888

BAY AREA COLON & RECTAL SURGEONS

Surgery

365 LENNON LN, SUITE 290
WALNUT CREEK, CA 94598

Contra Costa County (925) 274-9000

DR. RONALD B WASSERMAN M.D.

Internal Medicine (Infectious Disease)

365 LENNON LN, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 947-2334

DR. JORGE R BERNETT M.D.

Internal Medicine (Infectious Disease)

365 LENNON LN, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 947-2334

DEVIN T CALLISTER M.D.

Internal Medicine (Infectious Disease)

365 LENNON LN, SUITE 200
WALNUT CREEK, CA 94598

Contra Costa County (925) 947-2334

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 Brian Mcguinness's NPI number?

The NPI number for Brian Mcguinness is 1891870770. It was assigned to this individual provider in the NPPES registry on October 26, 2006.

Where is Brian Mcguinness located?

Brian Mcguinness practices at 365 Lennon Ln Ste. 290, Walnut Creek, CA 94598. The listed phone number is (925) 274-9000.

What is Brian Mcguinness's specialty?

The primary specialty registered for this NPI is Colon & Rectal Surgery with taxonomy code 208C00000X.

Is Brian Mcguinness enrolled in Medicare?

Yes. Brian Mcguinness is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Brian Mcguinness was last updated on February 26, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months 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.