FLESCHLER & PHILLIPS MEDICAL GROUP LLC
NPI 1497395461
Internal Medicine in Dallas, TX

Q: What is Fleschler & Phillips Medical Group LLC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Active since January 08, 2020CLIA 45D2185514 · Waiver

8230 WALNUT HILL LN STE 800, DALLAS, TX 75231(214) 345-1220(214) 750-2998 Get Directions Write a Review

NPPES record last updated: May 14, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 14, 2020, Jan 8, 2020 (2 updates tracked since 2020).

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About Fleschler & Phillips Medical Group Llc NPPES

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

FLESCHLER & PHILLIPS MEDICAL GROUP LLC (NPI 1497395461) is a healthcare organization registered as an internal medicine in Dallas, Texas and active in the NPI registry since January 2020. The organization holds a CLIA Waiver certificate valid through June 3, 2028 and lists Mark J. Fleschler, Physician / Owner, as its authorized official.

NPPES Registry Identity

NPI1497395461

Entity TypeOrganization

Primary Taxonomy207R00000X

Legal Business NameFLESCHLER & PHILLIPS MEDICAL GROUP LLC

Location Address8230 WALNUT HILL LN STE 800Dallas, TX 75231-4491

Mailing Address8230 Walnut Hill Ln Ste 800Dallas, TX 75231-4491 · (214) 345-1201 · Fax (469) 857-3053

Phone(214) 345-1220

Fax(214) 750-2998

Organization SubpartNo

Authorized OfficialMark J. FleschlerPhysician / Owner · (214) 734-4474

Enumeration DateJanuary 8, 2020

Last NPPES UpdateMay 14, 20202 updates tracked since enumeration

NPPES CertifiedMay 14, 2020

✔ NPI 1497395461 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Also ListedInternal Medicine · Geriatric MedicineTaxonomy 207RG0300X

8230 WALNUT HILL LN STE 800, Dallas, TX 75231

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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Fleschler & Phillips Medical Group Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 2 clinicians reassign Medicare billing to Fleschler & Phillips Medical Group LLC, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 2 within 10 miles. They are listed nearest first.

Clinicians, nearest first (2)

Mark Fleschler, M.D.

Internal Medicine

NPI 1083652986

8230 WALNUT HILL LN STE 800
Dallas, TX 75231

(214) 345-1220

✔ PECOS✔ Accepts MedicareSame address

Jeffrey Phillips, M.D.

Internal Medicine

NPI 1225070394

8210 WALNUT HILL LN SUITE 604 BLDG 1
Dallas, TX 75231

(214) 368-7787

✔ PECOS✔ Accepts MedicareSame address

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

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 45D2185514

Fleschler & Phillips Medical Group, LLC · Dallas, TX

Active · expires Jun 3, 2028

CLIA Number45D2185514

Laboratory TypePhysician Office

Certificate Effective DateJune 4, 2026

Certificate Expiration DateJune 3, 2028

Laboratory DirectorJeffrey H. Phillips

Laboratory Phone(214) 345-1201

Laboratory LocationFleschler & Phillips Medical Group, LLC8230 Walnut Hill Ln Suite 800, Dallas, TX 75231

CLIA data matches this NPI record on: Address Name Phone

This certificate is issued to a laboratory to perform only waived tests.

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 Fleschler & Phillips Medical Group LLC's NPI number?

The NPI number for Fleschler & Phillips Medical Group LLC is 1497395461. It was assigned to this organization in the NPPES registry on January 8, 2020.

Where is Fleschler & Phillips Medical Group LLC located?

Fleschler & Phillips Medical Group LLC is located at 8230 Walnut Hill Ln Ste 800, Dallas, TX 75231. The listed phone number is (214) 345-1220.

What is Fleschler & Phillips Medical Group LLC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Fleschler & Phillips Medical Group LLC enrolled in Medicare?

Yes. Fleschler & Phillips Medical Group LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Fleschler & Phillips Medical Group LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 2 clinicians, all in Internal Medicine, reassign their Medicare billing to Fleschler & Phillips Medical Group LLC. A 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 the clinician's services. Of these, 1 practice at this address and 2 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Fleschler & Phillips Medical Group LLC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 45D2185514) is associated with this NPI, valid through June 3, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Fleschler & Phillips Medical Group LLC was last updated on May 14, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.