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DR. LUIS DIEGO LEON M.D.
NPI 1235361759
Internal Medicine - Geriatric Medicine in Southington, CT

Active since August 17, 2009PECOS EnrolledAccepts Medicare Assignment
79.34/100
CMS Quality Rating
1115 WEST ST, SOUTHINGTON, CT 06489(860) 679-2766 Get Directions Write a Review

NPPES record last updated: September 12, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 12, 2022, Apr 30, 2019 (2 updates tracked since 2019).

About Dr. Luis Diego Leon M.d. NPPES

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

DR. LUIS DIEGO LEON M.D. (NPI 1235361759) is an individual geriatric medicine provider in Southington, Connecticut, licensed in Connecticut (049613) and active in the NPI registry since August 2009. He is enrolled in Medicare PECOS, maintains a secondary practice location in Waterbury, and is a graduate of Other (1999).

NPPES Registry Identity

NPI1235361759
Entity TypeIndividualMale
Primary Taxonomy207RG0300X
Provider Legal NameDR. LUIS DIEGO LEONCredential: M.D.
Location Address1115 WEST STSouthington, CT 06489-6025
Mailing AddressUconn Medical Group, 263 Farmington AvenueFarmington, CT 06030-0001 · (860) 679-8400 · Fax (860) 679-8188
Phone(860) 679-2766
Sole ProprietorNo
Medical School CMSOtherGraduated 1999
Enumeration DateAugust 17, 2009
Last NPPES UpdateSeptember 12, 20222 updates tracked since enumeration
✔ NPI 1235361759 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Geriatric MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207RG0300X
License✔ Licensed in CT · 049613
Definition
An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.
Also ListedInternal MedicineTaxonomy 207R00000X · License 049613 (CT)
1115 WEST ST, Southington, CT 06489
Open in Google Maps ↗

Secondary Practice Location 1

Location 180 Phoenix Ave, suite 201Waterbury, CT 06702-1418 · Phone (203) 756-8021 · Fax (203) 596-9038

Other Identifiers 1

Medicaid008036398CT

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.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

Dr. Luis Diego Leon 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 ID9133390925
PECOS Enrollment IDI20110928000235
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 Luis Leon reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

University Of Connecticut Health Center
9.5 mi
General Practice
263 FARMINGTON AVE
Farmington, CT 06030
  • Reassigned Medicare billing, Connecticut enrollment
  • 788 clinicians in this Medicare group
NPI 1720083769 (860) 679-7503

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 7

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
123 services75 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
67 services50 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
57 services57 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
19 services19 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
13 services12 patients
Administration of pneumococcal vaccine G0009
The pneumococcal vaccine helps protect against pneumococcal bacteria, which can cause severe infections like pneumonia and meningitis. The vaccine is given as an injection, typically in the arm. It's recommended for infants, older adults, and those with certain health conditions.
13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06489 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
$183.10 typical visit price
range $60.82 – $183.10
Typical copayment $45.77 (range $15.20 – $45.77)
Most-billed visit code 99205
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
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.

79.34/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality69.22
Promoting Interoperability100
Improvement Activities40
Cost48.08

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.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
7 suppliers18 claims43 services$5.81 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 11

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

VINCENT M LEONE M.D.
Internal Medicine
1115 WEST ST
SOUTHINGTON, CT 06489
Capitol Planning Region (860) 276-6000
DR. NARINDER MAHESHWARI MD
Internal Medicine
1115 WEST ST, UCONN MEDICAL GROUP
SOUTHINGTON, CT 06489
Capitol Planning Region (860) 276-6000
STEPHANIE FIORE MS, APRN, FNP-BC
Nurse Practitioner (Family)
1115 WEST ST
SOUTHINGTON, CT 06489
Capitol Planning Region (860) 276-6090
DAVID INYANGETOR M.D.
Internal Medicine
1115 WEST ST
SOUTHINGTON, CT 06489
Capitol Planning Region (860) 276-6000
DR. DANIELLE ELIZABETH LUCIANO M.D.
Obstetrics & Gynecology (Gynecology)
1115 WEST ST, 2ND FLOOR
SOUTHINGTON, CT 06489
Capitol Planning Region (860) 276-6043
DR. ANTHONY A LUCIANO M.D.
Obstetrics & Gynecology (Reproductive Endocrinology)
1115 WEST ST, 2ND FLOOR
SOUTHINGTON, CT 06489
Capitol Planning Region (860) 276-6043
DR. NEIL R LIEBOWITZ MD
Psychiatry & Neurology (Psychiatry)
1115 WEST ST
SOUTHINGTON, CT 06489
Capitol Planning Region (860) 276-6000
PRIM KASABIITI NURSE PRACTITIONER
Nurse Practitioner (Family)
1115 WEST ST
SOUTHINGTON, CT 06489
Capitol Planning Region (860) 276-6099

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 Luis Leon's NPI number?

The NPI number for Luis Leon is 1235361759. It was assigned to this individual provider in the NPPES registry on August 17, 2009.

Where is Luis Leon located?

Luis Leon practices at 1115 West St, Southington, CT 06489. The listed phone number is (860) 679-2766.

What is Luis Leon's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.

Is Luis Leon enrolled in Medicare?

Yes. Luis Leon 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 organization bills Medicare for Luis Leon's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Luis Leon reassigns Medicare benefits to University Of Connecticut Health Center (Farmington, CT). 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 Luis Leon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Luis Leon accept?

Health plans from Anthem Blue Cross and Blue Shield list Luis Leon 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 Luis Leon was last updated on September 12, 2022. 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.