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

Q: What is Lennon Gregor's NPI number?

The NPI number for Lennon Gregor is 1619618865. It was assigned to this individual provider in the NPPES registry on April 3, 2022.

Q: What is Lennon Gregor's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Lennon Gregor was last updated on August 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.

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: August 30, 2026.

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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

Phone(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.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

1120 W MICHIGAN ST # CL630, Indianapolis, IN 46202

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Secondary Practice Location 1

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

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.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.

MADISON OTT MD

Student in an Organized Health Care Education/Training Program