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MARK RAY MD DERMATOLOGY PLLC
NPI 1619560844
Dermatology in Little Elm, TX

Active since February 18, 2021CLIA 45D2213842 · Microscopy
2601 LITTLE ELM PKWY, SUITE 101, LITTLE ELM, TX 75068(972) 988-9945(469) 393-7707 Get Directions Write a Review

NPPES record last updated: April 13, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 13, 2021, Feb 18, 2021 (2 updates tracked since 2021).

About Mark Ray Md Dermatology Pllc NPPES

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

MARK RAY MD DERMATOLOGY PLLC (NPI 1619560844) is a healthcare organization registered as a dermatology in Little Elm, Texas and active in the NPI registry since February 2021. The organization holds a CLIA Microscopy certificate valid through February 16, 2027 and lists Mark Kirklin Ray, Owner, as its authorized official.

NPPES Registry Identity

NPI1619560844
Entity TypeOrganization
Primary Taxonomy207N00000X
Legal Business NameMARK RAY MD DERMATOLOGY PLLC
Location Address2601 LITTLE ELM PKWY, SUITE 101Little Elm, TX 75068-6677
Mailing Address1008 Long Isles LnLewisville, TX 75056-5684 · (972) 896-8824 · Fax (469) 393-9945
Phone(972) 988-9945
Fax(469) 393-7707
Organization SubpartNo
Authorized OfficialMark Kirklin RayOwner · (972) 988-9945
Enumeration DateFebruary 18, 2021
Last NPPES UpdateApril 13, 20212 updates tracked since enumeration
NPPES CertifiedMarch 15, 2021
✔ NPI 1619560844 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
Definition
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
2601 LITTLE ELM PKWY, Little Elm, TX 75068
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE 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)

Mark Ray Md Dermatology Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Mark Ray MD Dermatology PLLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Mark Ray, M.D.
Dermatology
NPI 1720022874
4340 N JOSEY LN SUITE 100
Carrollton, TX 75010
(972) 492-7900
✔ PECOS✔ Accepts Medicare9.7 mi

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 for Provider-Performed Microscopy Procedures (PPMP) 45D2213842

Mark Ray MD Dermatology · Little Elm, TX
Active · expires Feb 16, 2027
CLIA Number45D2213842
Laboratory TypePhysician Office
Certificate Effective DateFebruary 17, 2025
Certificate Expiration DateFebruary 16, 2027
Laboratory DirectorMark K. Ray
Laboratory Phone(972) 988-9945
Laboratory LocationMark Ray MD Dermatology2601 Little Elm Pkwy Suite 101, Little Elm, TX 75068
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory in which a physician, midlevel practitioner or dentist performs no tests other than the microscopy procedures. This certificate permits the laboratory to also perform 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 Mark Ray MD Dermatology PLLC's NPI number?

The NPI number for Mark Ray MD Dermatology PLLC is 1619560844. It was assigned to this organization in the NPPES registry on February 18, 2021.

Where is Mark Ray MD Dermatology PLLC located?

Mark Ray MD Dermatology PLLC is located at 2601 Little Elm Pkwy Suite 101, Little Elm, TX 75068. The listed phone number is (972) 988-9945.

What is Mark Ray MD Dermatology PLLC's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

Is Mark Ray MD Dermatology PLLC enrolled in Medicare?

Yes. Mark Ray MD Dermatology PLLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Mark Ray MD Dermatology PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Dermatology) reassigns their Medicare billing to Mark Ray MD Dermatology PLLC. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Mark Ray MD Dermatology PLLC hold a CLIA laboratory certificate?

Yes. A Certificate for Provider-Performed Microscopy Procedures (PPMP) (number 45D2213842) is associated with this NPI, valid through February 16, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Mark Ray MD Dermatology PLLC was last updated on April 13, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.