1. Home
  2. Directory
  3. Texas
  4. Dallas
  5. Internal Medicine
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

LANGDON STONE M.D.
NPI 1386064590
Internal Medicine - Nephrology in Dallas, TX

Active since April 27, 2014PECOS Enrolled
74.59/100
CMS Quality Rating
4900 HARRY HINES BLVD, DALLAS, TX 75284(214) 232-9296 Get Directions Write a Review

NPPES record last updated: October 1, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 1, 2026, Jun 3, 2019 (2 updates tracked since 2019).

About Langdon Stone M.d. NPPES

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

LANGDON STONE M.D. (NPI 1386064590) is an individual nephrology provider in Dallas, Texas, licensed in Texas (R4905) and active in the NPI registry since April 2014. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1386064590
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameLANGDON STONECredential: M.D.
Location Address4900 HARRY HINES BLVDDallas, TX 75284-7208
Mailing AddressPo Box 845347Dallas, TX 75284-7208
Phone(214) 232-9296
Sole ProprietorNo
Enumeration DateApril 27, 2014
Last NPPES UpdateOctober 1, 20262 updates tracked since enumeration
NPPES CertifiedOctober 1, 2026
✔ NPI 1386064590 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in TX · R4905
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
4900 HARRY HINES BLVD, Dallas, TX 75284
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Antidote Health of TX, Blue Cross and Blue Shield of Texas.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Langdon Stone M.d. 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 Langdon Stone reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Texas Southwestern Medical Center At Dallas
0.2 mi
Orthopaedic Surgery
5323 HARRY HINES BLVD
Dallas, TX 75390
  • Reassigned Medicare billing, Texas enrollment
  • 5,299 clinicians in this Medicare group
NPI 1083669766 (214) 645-0624

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 75284 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
$131.01 typical visit price
range $57.18 – $172.86
Typical copayment $32.75 (range $14.29 – $43.21)
Most-billed visit code 99204
Established Patient
$100.80 typical visit price
range $18.48 – $141.20
Typical copayment $25.20 (range $4.62 – $35.30)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

74.59/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality56.12
Promoting Interoperability100
Improvement Activities40
Cost59.2

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
4 suppliers11 claims11 services$66.79 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Langdon Stone's NPI number?

The NPI number for Langdon Stone is 1386064590. It was assigned to this individual provider in the NPPES registry on April 27, 2014.

Where is Langdon Stone located?

Langdon Stone practices at 4900 Harry Hines Blvd, Dallas, TX 75284. The listed phone number is (214) 232-9296.

What is Langdon Stone's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Langdon Stone enrolled in Medicare?

Yes. Langdon Stone is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Langdon Stone's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Langdon Stone reassigns Medicare benefits to University Of Texas Southwestern Medical Center At Dallas (Dallas, 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 Langdon Stone's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Langdon Stone accept?

Health plans from Antidote Health of TX and Blue Cross and Blue Shield of Texas list Langdon Stone 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 Langdon Stone was last updated on October 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 days 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.