MARLENE DIAZ M.D.
NPI 1427166644
Obstetrics & Gynecology - Gynecology in Plano, TX

Q: What is Marlene Diaz's NPI number?

The NPI number for Marlene Diaz is 1427166644. It was assigned to this individual provider in the NPPES registry on August 28, 2006.

Q: What is Marlene Diaz's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecology, with taxonomy code 207VG0400X.

Q: When was this NPI record last updated?

The NPPES record for Marlene Diaz was last updated on September 1, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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 August 28, 2006PECOS Enrolled

3060 COMMUNICATIONS PKWY STE 105, PLANO, TX 75093(972) 535-8000(972) 403-8003 Get Directions Write a Review

NPPES record last updated: September 1, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 1, 2022, May 26, 2022, Nov 22, 2019 and 2 more (5 updates tracked since 2017).

On this page

About Marlene Diaz M.d. NPPES

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

MARLENE DIAZ M.D. (NPI 1427166644) is an individual gynecology provider in Plano, Texas, licensed in Texas (J1971) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, is affiliated with Medical Center Of Mckinney, and is a graduate of University Of Texas Southwestern Medical School At Dallas (1995).

NPPES Registry Identity

NPI1427166644

Entity TypeIndividualFemale

Primary Taxonomy207VG0400X

Provider Legal NameMARLENE DIAZCredential: M.D.

Location Address3060 COMMUNICATIONS PKWY STE 105Plano, TX 75093-8464

Mailing Address3060 Communications Pkwy, Ste 105Plano, TX 75093-8464 · (972) 535-8000

Phone(972) 535-8000

Fax(972) 403-8003

Sole ProprietorNo

Medical School CMSUniversity Of Texas Southwestern Medical School At DallasGraduated 1995

Enumeration DateAugust 28, 2006

Last NPPES UpdateSeptember 1, 20225 updates tracked since enumeration

NPPES CertifiedSeptember 1, 2022

✔ NPI 1427166644 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & Gynecology · GynecologyAllopathic & Osteopathic Physicians

Taxonomy Code207VG0400X

License✔ Licensed in TX · J1971

Definition

A physician who specializes in diagnosis, treatment, and management of patients with gynecologic conditions. Source: National Uniform Claim Committee

Also ListedSpecialistTaxonomy 174400000X · License J1971 (TX)

3060 COMMUNICATIONS PKWY STE 105, Plano, TX 75093

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Other Identifiers 1

OtherJ1971TX · State Medical License

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Baylor Scott and White Health Plan, UnitedHealthcare.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marlene Diaz M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID1759467749

PECOS Enrollment IDI20110317000470

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 Marlene Diaz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Plano Wellness Medical PLLC

Same address

Gynecology

3060 COMMUNICATIONS PKWY STE 105
Plano, TX 75093

Reassigned Medicare billing, Texas enrollment

NPI 1033603907 (972) 535-8000

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

Areas of Expertise CMS Part B claims 5

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.

50 services33 patients

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.

40 services31 patients

Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory Q0091

A Papanicolaou smear, often called a Pap smear, is a test to check for changes in cells. A small sample is gently collected from the lower region and sent to a lab for examination. This helps in early detection of potential health issues.

25 services25 patients

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101

This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.

24 services24 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Medical Center Of Mckinney

Acute Care Hospitals · Mckinney, TX

3/5 CMS rating

OwnershipProprietary

CMS Certification Number450403

Location4500 Medical Center DriveMckinney, TX 75069 · Collin County

Emergency services Birthing friendly

Medical City Plano

Acute Care Hospitals · Plano, TX

3/5 CMS rating

OwnershipProprietary

CMS Certification Number450651

Location3901 W 15th StPlano, TX 75075 · Collin County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 75093 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

$126.40 typical visit price

range $54.84 – $166.88

Typical copayment $31.60 (range $13.71 – $41.72)

Most-billed visit code 99204

Established Patient

$68.55 typical visit price

range $17.52 – $136.11

Typical copayment $17.13 (range $4.38 – $34.02)

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.

Other Providers at the Same Location NPPES 3

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

PLANO WELLNESS MEDICAL PLLC

Obstetrics & Gynecology (Gynecology)

3060 COMMUNICATIONS PKWY STE 105
PLANO, TX 75093

Collin County (972) 535-8000

DEBRA WERLEY WHNP-BC

Nurse Practitioner (Women's Health)

3060 COMMUNICATIONS PKWY STE 105
PLANO, TX 75093

Collin County (972) 535-8000

LISA M UMHOLTZ M.D.

Specialist

3060 COMMUNICATIONS PKWY STE 105
PLANO, TX 75093

Collin County (972) 535-8000

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 Marlene Diaz's NPI number?

The NPI number for Marlene Diaz is 1427166644. It was assigned to this individual provider in the NPPES registry on August 28, 2006.

Where is Marlene Diaz located?

Marlene Diaz practices at 3060 Communications Pkwy Ste 105, Plano, TX 75093. The listed phone number is (972) 535-8000.

What is Marlene Diaz's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecology, with taxonomy code 207VG0400X.

Is Marlene Diaz enrolled in Medicare?

Yes. Marlene Diaz is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Marlene Diaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marlene Diaz reassigns Medicare benefits to Plano Wellness Medical PLLC (Plano, TX). The 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 Marlene Diaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marlene Diaz accept?

Health plans from Baylor Scott and White Health Plan and UnitedHealthcare list Marlene Diaz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Marlene Diaz affiliated with any hospitals?

According to CMS data, Marlene Diaz is affiliated with Medical Center Of Mckinney and Medical City Plano.

When was this NPI record last updated?

The NPPES record for Marlene Diaz was last updated on September 1, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.