ANN CHRISTINE THOLEN R.D.L.D.
NPI 1619414877
Dietitian, Registered in Houston, TX

Q: What is Ann Tholen's NPI number?

The NPI number for Ann Tholen is 1619414877. It was assigned to this individual provider in the NPPES registry on January 26, 2017. The provider is also known as Ann Christine Casey R.D.L.D..

Q: What is Ann Tholen's specialty?

The primary specialty registered for this NPI is Dietitian, Registered with taxonomy code 133V00000X.

Q: When was this NPI record last updated?

The NPPES record for Ann Tholen was last updated on December 28, 2021. 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 January 26, 2017Accepts Medicare Assignment

6624 FANNIN ST STE 2260, HOUSTON, TX 77030(713) 795-0770(713) 795-0855 Get Directions Write a Review

NPPES record last updated: December 28, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 28, 2021, Jun 22, 2021, May 16, 2018 and 1 more (4 updates tracked since 2017).

On this page

About Ann Christine Tholen R.d.l.d. NPPES

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

ANN CHRISTINE THOLEN R.D.L.D. (NPI 1619414877) is an individual dietitian, registered in Houston, Texas, licensed in Texas (DT84605) and active in the NPI registry since January 2017. She maintains a secondary practice location in Katy and is a graduate of Other (1998).

NPPES Registry Identity

NPI1619414877

Entity TypeIndividualFemale

Primary Taxonomy133V00000X

Provider Legal NameANN CHRISTINE THOLENCredential: R.D.L.D.

Location Address6624 FANNIN ST STE 2260Houston, TX 77030-2334

Mailing Address6624 Fannin St Ste 2260Houston, TX 77030-2334 · (713) 795-0770 · Fax (713) 795-0855

Phone(713) 795-0770

Fax(713) 795-0855

Sole ProprietorNo

Medical School CMSOtherGraduated 1998

Enumeration DateJanuary 26, 2017

Last NPPES UpdateDecember 28, 20214 updates tracked since enumeration

NPPES CertifiedDecember 28, 2021

✔ NPI 1619414877 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDietitian, RegisteredDietary & Nutritional Service Providers

Taxonomy Code133V00000X

License✔ Licensed in TX · DT84605

Definition

A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation.

6624 FANNIN ST STE 2260, Houston, TX 77030

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Other Names 1

Former Name (1)Ann Christine Casey R.d.l.d.

Secondary Practice Location 1

Location 123920 Katy Fwy Ste 500Katy, TX 77494-0882 · Phone (713) 795-0770 · Fax (713) 795-0855

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 and accepts Medicare assignment

Ann Christine Tholen R.d.l.d. 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 ID42254559

PECOS Enrollment IDI20050615000817

Medicare Billing Reassignments

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

Kelsey-Seybold Medical Group, PLLC

1.2 mi

Multi-Specialty

2727 W HOLCOMBE BLVD
Houston, TX 77025

Reassigned Medicare billing, Texas enrollment
1,649 clinicians in this Medicare group

NPI 1013915255 (713) 442-0000

Houston Thyroid And Endocrine Specialists

3.6 mi

Endocrinology, Diabetes & Metabolism

4747 BELLAIRE BLVD STE 275
Bellaire, TX 77401

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

NPI 1124261797 (713) 795-0770

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 2

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.

Therapy procedure for nutrition management, each 15 minutes 97802

This is a 15-minute session focused on managing your nutrition. A professional will assess your dietary habits and provide personalized advice to improve your health. It can help manage weight, control chronic diseases, and promote overall wellbeing.

125 services29 patients

Therapy procedure reassessment for nutrition management, each 15 minutes 97803

This is a process where a healthcare professional reviews your nutritional needs every 15 minutes. It's part of managing your diet to ensure optimal health. The review may involve adjusting your meal plans, evaluating your body's response to certain foods, and monitoring your overall nutrition status.

90 services17 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77030 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

$0.00 typical visit price

range $58.24 – $176.98

Typical copayment $0.00 (range $14.56 – $44.24)

Most-billed visit code NA

Established Patient

$102.71 typical visit price

range $18.60 – $143.93

Typical copayment $25.67 (range $4.65 – $35.98)

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

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

DINA WINOGRAD MD

Internal Medicine (Endocrinology, Diabetes & Metabolism)

6624 FANNIN ST STE 2260
HOUSTON, TX 77030

Harris County (713) 795-0770

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 Ann Tholen's NPI number?

The NPI number for Ann Tholen is 1619414877. It was assigned to this individual provider in the NPPES registry on January 26, 2017. The provider is also known as Ann Christine Casey R.D.L.D..

Where is Ann Tholen located?

Ann Tholen practices at 6624 Fannin St Ste 2260, Houston, TX 77030. The listed phone number is (713) 795-0770.

What is Ann Tholen's specialty?

The primary specialty registered for this NPI is Dietitian, Registered with taxonomy code 133V00000X.

Is Ann Tholen enrolled in Medicare?

Yes. Ann Tholen 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 Ann Tholen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ann Tholen reassigns Medicare benefits to 2 organizations: Kelsey-Seybold Medical Group, PLLC (Houston, TX) and Houston Thyroid And Endocrine Specialists (Bellaire, TX). 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 Ann Tholen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ann Tholen accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 1 other insurer list Ann Tholen 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 Ann Tholen was last updated on December 28, 2021. 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.