HALEY C OVERSTREET M.D.
NPI 1700107323
Allergy & Immunology in Cedar Park, TX

Q: What is Haley Overstreet's NPI number?

The NPI number for Haley Overstreet is 1700107323. It was assigned to this individual provider in the NPPES registry on June 17, 2010.

Q: What is Haley Overstreet's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Q: When was this NPI record last updated?

The NPPES record for Haley Overstreet was last updated on February 26, 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 June 17, 2010PECOS Enrolled

1335 E WHITESTONE BLVD STE 120, CEDAR PARK, TX 78613(512) 222-5856 Get Directions Write a Review

NPPES record last updated: February 26, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 7, 2022, Aug 25, 2021 (2 updates tracked since 2021).

On this page

About Haley C Overstreet M.d. NPPES

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

HALEY C OVERSTREET M.D. (NPI 1700107323) is an individual allergy & immunology provider in Cedar Park, Texas, licensed in Texas (P8400) and active in the NPI registry since June 2010. She is enrolled in Medicare PECOS and is a graduate of University Of Alabama School Of Medicine (2009).

NPPES Registry Identity

NPI1700107323

Entity TypeIndividualFemale

Primary Taxonomy207K00000X

Provider Legal NameHALEY C OVERSTREETCredential: M.D.

Location Address1335 E WHITESTONE BLVD STE 120Cedar Park, TX 78613-7598

Mailing Address5929 Balcones Dr Ste 200Austin, TX 78731-4280 · (512) 550-1800

Phone(512) 222-5856

Sole ProprietorNo

Medical School CMSUniversity Of Alabama School Of MedicineGraduated 2009

Enumeration DateJune 17, 2010

Last NPPES UpdateFebruary 26, 20242 updates tracked since enumeration

NPPES CertifiedFebruary 26, 2024

✔ NPI 1700107323 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

License✔ Licensed in TX · P8400

Definition

An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

Also ListedFamily MedicineTaxonomy 207Q00000X · License L.3306 (AL), P8400 (TX)

1335 E WHITESTONE BLVD STE 120, Cedar Park, TX 78613

Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Haley C Overstreet M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8426288358

PECOS Enrollment IDI20140220000770

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

Sinus & Allergy Specialists Of Texas

13 mi

Allergy & Immunology

5929 BALCONES DR STE 200
Austin, TX 78731

Reassigned Medicare billing, Texas enrollment
33 clinicians in this Medicare group

NPI 1639510803 (512) 550-1800

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 8

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.

Test for allergy using allergenic extract 95004

An allergy test with allergenic extract is a diagnostic method to identify substances causing allergic reactions. Small amounts of common allergens are introduced to your body, usually through skin pricks or blood tests. Your body's response helps determine your allergies.

2,884 services49 patients

Professional service for multiple injections of allergen 95117

The professional service for multiple injections of allergens involves administering small doses of specific allergens into your body. This is done to help your immune system become less sensitive to them, reducing your allergic reaction over time. It's a safe, effective way to manage allergies.

1,800 services171 patients

Test for allergy using allergenic extract injected into skin 95024

An allergy skin test involves injecting a small amount of allergenic extract into your skin. This test helps determine if you're allergic to specific substances. If allergic, a small red bump appears at the test site. It's safe and quick.

1,386 services117 patients

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.

180 services136 patients

Diagnostic exam of nasal passages using an endoscope 31231

A diagnostic exam of nasal passages using an endoscope is a non-invasive procedure. A small, flexible tube with a light and camera at the end, called an endoscope, is inserted into the nose. This allows the doctor to view the nasal passages and sinuses, helping to identify any issues.

107 services94 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

92 services92 patients

Other Providers at the Same Location NPPES

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

SAVANNAH LEIGH SOMMERHALDER M.D.

Allergy & Immunology

1335 E WHITESTONE BLVD STE 120
CEDAR PARK, TX 78613

Williamson County (512) 222-5856

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 Haley Overstreet's NPI number?

The NPI number for Haley Overstreet is 1700107323. It was assigned to this individual provider in the NPPES registry on June 17, 2010.

Where is Haley Overstreet located?

Haley Overstreet practices at 1335 E Whitestone Blvd Ste 120, Cedar Park, TX 78613. The listed phone number is (512) 222-5856.

What is Haley Overstreet's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Is Haley Overstreet enrolled in Medicare?

Yes. Haley Overstreet is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Haley Overstreet's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Haley Overstreet reassigns Medicare benefits to Sinus & Allergy Specialists Of Texas (Austin, 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 Haley Overstreet's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Haley Overstreet accept?

Health plans from Ambetter Health, Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and Ambetter from Superior HealthPlan and 8 other insurers list Haley Overstreet 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.

When was this NPI record last updated?

The NPPES record for Haley Overstreet was last updated on February 26, 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.