LENNON WALLACE GREGOR MD
NPI 1619618865
Internal Medicine in Indianapolis, IN

Active since April 03, 2022PECOS EnrolledAccepts Medicare Assignment
1120 W MICHIGAN ST # CL630, INDIANAPOLIS, IN 46202(317) 274-2686 Get Directions Write a Review

NPPES record last updated: August 18, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Lennon Wallace Gregor Md NPPES

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

LENNON WALLACE GREGOR MD (NPI 1619618865) is an individual internal medicine provider in Indianapolis, Indiana, licensed in Indiana (01096556A) and active in the NPI registry since April 2022. He is enrolled in Medicare PECOS, is affiliated with Indiana University Health, and maintains a secondary practice location in Mccordsville.

NPPES Registry Identity

NPI1619618865
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameLENNON WALLACE GREGORCredential: MD
Location Address1120 W MICHIGAN ST # CL630Indianapolis, IN 46202-5209
Mailing Address1120 W Michigan St # Cl630Indianapolis, IN 46202-5209 · (317) 274-2686
Sole ProprietorNo
Medical School CMSIndiana University School Of MedicineGraduated 2022
Enumeration DateApril 3, 2022
Last NPPES UpdateAugust 18, 2025
NPPES CertifiedAugust 18, 2025
NPI 1619618865 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in IN · 01096556A
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.

1120 W MICHIGAN ST # CL630, Indianapolis, IN 46202

Secondary Practice Location 1

Location 15986 Main StMcCordsville, IN 46055-9851 · Phone (317) 589-1115

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Lennon Wallace Gregor Md 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 ID7719366251
PECOS Enrollment IDI20250825000948
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.

Hospital Affiliations CMS Care Compare

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

Indiana University Health

Acute Care Hospitals · Indianapolis, IN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number150056
Location1701 N Senate BlvdIndianapolis, IN 46202 · Marion County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 46202 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
$122.49 typical visit price
range $53.07 – $161.76
Typical copayment $30.62 (range $13.26 – $40.44)
Most-billed visit code 99204
Established Patient
$94.22 typical visit price
range $16.93 – $132.22
Typical copayment $23.55 (range $4.23 – $33.05)
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.

Other Providers at the Same Location NPPES 20

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

Student in an Organized Health Care Education/Training Program
1120 W MICHIGAN ST # CL630
INDIANAPOLIS, IN 46202
Student in an Organized Health Care Education/Training Program
1120 W MICHIGAN ST # CL630
INDIANAPOLIS, IN 46202
Student in an Organized Health Care Education/Training Program
1120 W MICHIGAN ST # CL630
INDIANAPOLIS, IN 46202
Student in an Organized Health Care Education/Training Program
1120 W MICHIGAN ST # CL630
INDIANAPOLIS, IN 46202
Student in an Organized Health Care Education/Training Program
1120 W MICHIGAN ST # CL630
INDIANAPOLIS, IN 46202
Student in an Organized Health Care Education/Training Program
1120 W MICHIGAN ST # CL630
INDIANAPOLIS, IN 46202
Student in an Organized Health Care Education/Training Program
1120 W MICHIGAN ST # CL630
INDIANAPOLIS, IN 46202
Student in an Organized Health Care Education/Training Program
1120 W MICHIGAN ST # CL630
INDIANAPOLIS, IN 46202

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1619618865, enumerated as an "individual" on April 03, 2022.

The provider is located at 1120 W MICHIGAN ST # CL630 INDIANAPOLIS, IN 46202 and the phone number is (317) 274-2686.

Internal Medicine with taxonomy code 207R00000X.

The provider might be accepting Accepts: Ambetter from Buckeye Health Plan, Ambetter from. Please consult your insurance carrier or call the provider to verify.

Lennon Gregor is affiliated with: INDIANA UNIVERSITY HEALTH.