DENIS MAHAR
NPI 1841373891
Family Medicine in Martinez, CA

Q: What is Denis Mahar's NPI number?

The NPI number for Denis Mahar is 1841373891. It was assigned to this individual provider in the NPPES registry on October 23, 2006.

Q: What is Denis Mahar's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for Denis Mahar was last updated on June 5, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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 October 23, 2006PECOS Enrolled

2500 ALHAMBRA AVE, MARTINEZ, CA 94553(925) 370-5110(925) 370-5142 Get Directions Write a Review

NPPES record last updated: June 5, 2013. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Denis Mahar NPPES

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

DENIS MAHAR (NPI 1841373891) is an individual family medicine provider in Martinez, California, licensed in California (G77241) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (1992).

NPPES Registry Identity

NPI1841373891

Entity TypeIndividualMale

Primary Taxonomy207Q00000X

Provider Legal NameDENIS MAHAR

Location Address2500 ALHAMBRA AVEMartinez, CA 94553-3156

Mailing Address50 Douglas Dr, Suite 391Martinez, CA 94553-4098 · (925) 957-5483 · Fax (925) 957-5401

Phone(925) 370-5110

Fax(925) 370-5142

Sole ProprietorYes

Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 1992

Enumeration DateOctober 23, 2006

Last NPPES UpdateJune 5, 2013

✔ NPI 1841373891 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in CA · G77241

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

2500 ALHAMBRA AVE, Martinez, CA 94553

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Denis Mahar is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3375713282

PECOS Enrollment IDI20260611001011

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 Reassignment

Medicare enrollment records show Denis Mahar reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Contra Costa County

Same address

General Acute Care Hospital

2500 ALHAMBRA AVE
Martinez, CA 94553

Reassigned Medicare billing, California enrollment
530 clinicians in this Medicare group

NPI 1386719086 (925) 370-5955

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94553 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

$119.48 typical visit price

range $23.44 – $166.46

Typical copayment $29.87 (range $5.86 – $41.61)

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.

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.

JOHN S HAWKINS

Family Medicine