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LEONIDAS N VIERON M.D.
NPI 1245387737
Internal Medicine in Memphis, TN

Active since January 05, 2007PECOS EnrolledAccepts Medicare Assignment
2316 THORNWOOD LN, MEMPHIS, TN 38119(901) 763-1695(901) 682-3150 Get Directions Write a Review

NPPES record last updated: November 24, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Nov 24, 2020, Nov 21, 2019 (2 updates tracked since 2019).

About Leonidas N Vieron M.d. NPPES

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

LEONIDAS N VIERON M.D. (NPI 1245387737) is an individual internal medicine provider in Memphis, Tennessee, licensed in Tennessee (9440) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, is affiliated with Baptist Memorial Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1245387737
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameLEONIDAS N VIERONCredential: M.D.
Location Address2316 THORNWOOD LNMemphis, TN 38119-6722
Mailing AddressPo Box 172339Memphis, TN 38187-2339 · (901) 844-1425 · Fax (901) 844-1439
Phone(901) 763-1695
Fax(901) 682-3150
Sole ProprietorNo
Medical School CMSUniversity Of Tennessee, Hsc, College Of MedicineGraduated 1975
Enumeration DateJanuary 5, 2007
Last NPPES UpdateNovember 24, 20202 updates tracked since enumeration
NPPES CertifiedNovember 24, 2020
✔ NPI 1245387737 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in TN · 9440✔ Licensed in MS · 23420✔ Licensed in AR · R-4704
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.
2316 THORNWOOD LN, Memphis, TN 38119
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Secondary Practice Locations 2

Location 17601 Southcrest PkwySouthaven, MS 38671-4739 · Phone (662) 772-2980 · Fax (662) 772-2960
Location 22100 N 7th StWest Memphis, AR 72301-2017 · Phone (901) 226-3610 · Fax (901) 226-3612

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health Plan, Inc., Oscar Insurance Company.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

Leonidas N Vieron M.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 ID42376691
PECOS Enrollment IDI20090305000345
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 Reassignments

2

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

Southeastern Physician Services PC
322 mi
Hospitalist
990 OAK RIDGE TPKE
Oak Ridge, TN 37830
  • Reassigned Medicare billing, Tennessee enrollment
  • 1,085 clinicians in this Medicare group
NPI 1083835441 (865) 481-1000
Hospital Medicine Associates LLC
327 mi
Hospitalist
17000 MEDICAL CENTER DR
Baton Rouge, LA 70816
  • Reassigned Medicare billing, Mississippi enrollment
  • 41 clinicians in this Medicare group
NPI 1093758781 (225) 752-2470

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 5

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
736 services218 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
154 services68 patients
Hospital discharge day management, more than 30 minutes 99239
Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.
132 services129 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
61 services60 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
11 services11 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Baptist Memorial Hospital

Acute Care Hospitals · Memphis, TN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number440048
Location6019 Walnut Grove RoadMemphis, TN 38120 · Shelby County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 38119 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
$121.80 typical visit price
range $52.64 – $160.89
Typical copayment $30.45 (range $13.16 – $40.22)
Most-billed visit code 99204
Established Patient
$93.60 typical visit price
range $16.72 – $131.41
Typical copayment $23.40 (range $4.18 – $32.85)
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.

Reported Quality Measures

Care Plan
Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…
100%303 patients5/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Referred Medical Equipment & Supplies CMS DME claims 5

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

Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260
DME-Hospital Beds · category DB000N
1 supplier14 claims14 services$43.25 avg. paid by Medicare
Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
2 suppliers15 claims15 services$14.64 avg. paid by Medicare
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
2 suppliers17 claims17 services$83.47 avg. paid by Medicare
Standard wheelchair K0001
DME-Wheelchairs · category DD000N
2 suppliers29 claims29 services$19.45 avg. paid by Medicare
Elevating leg rests, pair (for use with capped rental wheelchair base) K0195
DME-Wheelchairs · category DD021N
1 supplier12 claims12 services$9.44 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES

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

LEE VIERON MD
Internal Medicine
2316 THORNWOOD LN
MEMPHIS, TN 38119
Shelby County (901) 844-1425

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 Leonidas Vieron's NPI number?

The NPI number for Leonidas Vieron is 1245387737. It was assigned to this individual provider in the NPPES registry on January 5, 2007.

Where is Leonidas Vieron located?

Leonidas Vieron practices at 2316 Thornwood Ln, Memphis, TN 38119. The listed phone number is (901) 763-1695.

What is Leonidas Vieron's specialty?

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

Is Leonidas Vieron enrolled in Medicare?

Yes. Leonidas Vieron 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 Leonidas Vieron's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Leonidas Vieron reassigns Medicare benefits to 2 organizations: Southeastern Physician Services PC (Oak Ridge, TN) and Hospital Medicine Associates LLC (Baton Rouge, LA). 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 Leonidas Vieron's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Leonidas Vieron accept?

Health plans from Oscar Health Plan, Inc. and Oscar Insurance Company list Leonidas Vieron 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.

Is Leonidas Vieron affiliated with any hospitals?

According to CMS data, Leonidas Vieron is affiliated with Baptist Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Leonidas Vieron was last updated on November 24, 2020. 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.