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GUY DELOREFICE M.D.
NPI 1952426421
Internal Medicine in Sonoma, CA

Active since March 20, 2007PECOS EnrolledAccepts Medicare Assignment
17.81/100
CMS Quality Rating
370 PERKINS ST, SONOMA, CA 95476(707) 938-1255(707) 938-2321 Get Directions Write a Review

NPPES record last updated: June 18, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Guy Delorefice M.d. NPPES

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

GUY DELOREFICE M.D. (NPI 1952426421) is an individual internal medicine provider in Sonoma, California, licensed in California (A0689180) and active in the NPI registry since March 2007. He is enrolled in Medicare PECOS and is a graduate of Creighton University School Of Medicine (1996).

NPPES Registry Identity

NPI1952426421
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameGUY DELOREFICECredential: M.D.
Location Address370 PERKINS STSonoma, CA 95476-6827
Mailing Address370 Perkins StSonoma, CA 95476-6827 · (707) 938-1255 · Fax (707) 938-2321
Phone(707) 938-1255
Fax(707) 938-2321
Sole ProprietorNo
Medical School CMSCreighton University School Of MedicineGraduated 1996
Enumeration DateMarch 20, 2007
Last NPPES UpdateJune 18, 2026
NPPES CertifiedJune 18, 2026
✔ NPI 1952426421 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A0689180
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
370 PERKINS ST, Sonoma, CA 95476
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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 and accepts Medicare assignment

Guy Delorefice 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 ID4789744715
PECOS Enrollment IDI20081120000879
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 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.
394 services168 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
161 services161 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
109 services105 patients
Injection of drug or substance under skin or into muscle 96372
This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.
101 services19 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.
95 services59 patients
Prostate cancer screening; digital rectal examination G0102
Prostate cancer screening involves a simple test called a digital rectal examination. In this procedure, a healthcare professional checks for any irregularities in the gland located under your bladder. This test can help detect issues early, improving outcomes.
62 services62 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95476 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
$142.00 typical visit price
range $63.04 – $187.01
Typical copayment $35.50 (range $15.76 – $46.75)
Most-billed visit code 99204
Established Patient
$109.88 typical visit price
range $21.02 – $153.40
Typical copayment $27.47 (range $5.25 – $38.35)
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.

17.81/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored
Quality0
Improvement Activities0
Cost59.39

Other Providers at the Same Location NPPES

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

GUY DELOREFICE M.D. INC.
Internal Medicine
370 PERKINS ST
SONOMA, CA 95476
Sonoma County (707) 938-1255

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 Guy Delorefice's NPI number?

The NPI number for Guy Delorefice is 1952426421. It was assigned to this individual provider in the NPPES registry on March 20, 2007.

Where is Guy Delorefice located?

Guy Delorefice practices at 370 Perkins St, Sonoma, CA 95476. The listed phone number is (707) 938-1255.

What is Guy Delorefice's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Guy Delorefice enrolled in Medicare?

Yes. Guy Delorefice 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 Guy Delorefice was last updated on June 18, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.