DR. KAREN C. DIAZ MD
NPI 1023125010
Obstetrics & Gynecology - Obstetrics in San Antonio, TX

Q: What is Karen Diaz's NPI number?

The NPI number for Karen Diaz is 1023125010. It was assigned to this individual provider in the NPPES registry on August 24, 2006.

Q: What is Karen Diaz's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Obstetrics, with taxonomy code 207VX0000X.

Q: When was this NPI record last updated?

The NPPES record for Karen Diaz was last updated on August 23, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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 24, 2006PECOS Enrolled

8300 FLOYD CURL DR FL 5, SAN ANTONIO, TX 78229(210) 450-9500(210) 450-6027 Get Directions Write a Review

NPPES record last updated: August 23, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Aug 23, 2024, Dec 6, 2022 (2 updates tracked since 2022).

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About Dr. Karen C. Diaz Md NPPES

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

DR. KAREN C. DIAZ MD (NPI 1023125010) is an individual obstetrics provider in San Antonio, Texas, licensed in Texas (G4981) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and maintains a secondary practice location in San Antonio.

NPPES Registry Identity

NPI1023125010

Entity TypeIndividualFemale

Primary Taxonomy207VX0000X

Provider Legal NameDR. KAREN C. DIAZCredential: MD

Location Address8300 FLOYD CURL DR FL 5San Antonio, TX 78229-3931

Mailing Address8300 Floyd Curl Dr Fl 5San Antonio, TX 78229-3931 · (210) 450-9500 · Fax (210) 450-6027

Phone(210) 450-9500

Fax(210) 450-6027

Sole ProprietorNo

Enumeration DateAugust 24, 2006

Last NPPES UpdateAugust 23, 20242 updates tracked since enumeration

NPPES CertifiedAugust 23, 2024

✔ NPI 1023125010 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & Gynecology · ObstetricsAllopathic & Osteopathic Physicians

Taxonomy Code207VX0000X

License✔ Licensed in TX · G4981

Definition

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

Also ListedObstetrics & GynecologyTaxonomy 207V00000X · License G4981 (TX)

8300 FLOYD CURL DR FL 5, San Antonio, TX 78229

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Secondary Practice Location 1

Location 1903 W Martin StSan Antonio, TX 78207-0903 · Phone (210) 358-3582 · Fax (210) 358-3252

Other Identifiers 1

Medicaid117813901TX

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Karen C. Diaz Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

University Of Texas Health Science Center At San Antonio

0.1 mi

Dental

8210 FLOYD CURL DR
San Antonio, TX 78229

Reassigned Medicare billing, Texas enrollment
2,397 clinicians in this Medicare group

NPI 1760424873 (210) 567-6405

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 78229 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 20

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

JULIE HORSTING M.R., M.S., LCGC

Genetic Counselor, MS