1. Home
  2. Directory
  3. California
  4. Pleasant Hill
  5. Family Medicine
  6. NPI Profile

GRETA TERESA PEREZ
NPI 1306988423
Family Medicine in Pleasant Hill, CA

Active since February 13, 2007PECOS EnrolledAccepts Medicare Assignment
600 RYAN DR APT 16, PLEASANT HILL, CA 94523(925) 825-7565(925) 427-8304 Get Directions Write a Review

NPPES record last updated: September 8, 2011. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Greta Teresa Perez NPPES

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

GRETA TERESA PEREZ (NPI 1306988423) is an individual family medicine provider in Pleasant Hill, California, licensed in California (A55601) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of Other (1994).

NPPES Registry Identity

NPI1306988423
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameGRETA TERESA PEREZ
Location Address600 RYAN DR APT 16Pleasant Hill, CA 94523-5168
Mailing Address600 Ryan Dr Apt 16Pleasant Hill, CA 94523-5168 · (925) 825-7565 · Fax (925) 427-8304
Phone(925) 825-7565
Fax(925) 427-8304
Sole ProprietorYes
Medical School CMSOtherGraduated 1994
Enumeration DateFebruary 13, 2007
Last NPPES UpdateSeptember 8, 2011
✔ NPI 1306988423 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 · A55601
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.
600 RYAN DR APT 16, Pleasant Hill, CA 94523
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Greta Teresa Perez 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 ID2365629433
PECOS Enrollment IDI20251219001009
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 Reassignments

2

Medicare enrollment records show Greta Perez reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Contra Costa County
1.4 mi
Adult Mental Health
1420 WILLOW PASS RD
Concord, CA 94520
  • Reassigned Medicare billing, California enrollment
  • 530 clinicians in this Medicare group
NPI 1023188489 (925) 646-5480
John Muir Physician Network
3.7 mi
General Practice
1450 TREAT BLVD, SUITE 300
Walnut Creek, CA 94597
  • Reassigned Medicare billing, California enrollment
  • 650 clinicians in this Medicare group
NPI 1841407665 (925) 296-9872

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 94523 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.

Referred Medical Equipment & Supplies CMS DME claims 4

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
11 suppliers49 claims162 services$6.36 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
6 suppliers22 claims42 services$1.16 avg. paid by Medicare
Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
1 supplier12 claims12 services$14.99 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
1 supplier12 claims12 services$69.20 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Greta Perez's NPI number?

The NPI number for Greta Perez is 1306988423. It was assigned to this individual provider in the NPPES registry on February 13, 2007.

Where is Greta Perez located?

Greta Perez practices at 600 Ryan Dr Apt 16, Pleasant Hill, CA 94523. The listed phone number is (925) 825-7565.

What is Greta Perez's specialty?

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

Is Greta Perez enrolled in Medicare?

Yes. Greta Perez 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.

Which organizations bill Medicare for Greta Perez's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Greta Perez reassigns Medicare benefits to 2 organizations: Contra Costa County (Concord, CA) and John Muir Physician Network (Walnut Creek, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Greta Perez's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Greta Perez was last updated on September 8, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.