Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1538119953 Individual Practitioner Male Practitioner

Mark E Tiritilli

Internal Medicine • Indianapolis, IN

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Mark Tiritilli is a certified Internal Medicine practicing in Indianapolis, IN. With approximately 35 years of clinical experience since graduating from Loyola University Of Chicago, Stritch School Of Medicine in 1991, Mark Tiritilli delivers high-quality medical care to the local community at 9443 E 38TH ST.

Mark Tiritilli is affiliated with The Health And Hospital Corporation Of Marion County and accepts Medicare assignment.

Frequently performed procedures and clinical services include hemoglobin a1c level, urinalysis, manual test, insertion of needle into vein for collection of blood sample. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

9443 E 38th St

Indianapolis, IN 462352132

Telephone 3178902100
Fax 3178902171
Associated Practice Facility / Clinic

Medicare Profile & Education

Medical School

Loyola University Of Chicago, Stritch School Of Medicine

Graduation Year

1991

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Indianapolis, IN

Senior Veteran Specialist (>20 Yrs)
Practitioner Clinical Experience
35 Yrs +15.4 yrs vs City Avg
City Avg: 19.6 Yrs
State Avg: 26.2 Yrs
Regional Practice Density
730 Specialists

Practicing in Indianapolis, IN (2204 Statewide)

Telehealth Adoption Rate
9.3% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
78.9% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Tiritilli (35 Years) 35 Yrs
Indianapolis Specialty Average (19.6 Years) 19.6 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2023)
Reporting Year:
HCPCS Code & Description Services Patients Submitted Charge Medicare Allowed
83036 Hemoglobin A1C level
25 19 $45.05 $9.52

Medical Specialties & State Licenses

CMS Verified: 2025-10-02
Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License IN 01043935A

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.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID
100200080 (IN)

Hospital & Practice Group Affiliations

The Health And Hospital Corporation Of Marion County

720 Eskeanzi Ave, Indianapolis, IN 462025166

Phone: 3178800000

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

18 Associated Practitioners
Lindsay Reason , RD

Dietitian, Registered

NPI 1215248091

Registered Dietitian

Krunal Shah , FNP-C

Nurse Practitioner

NPI 1255025771

Family Nurse Practitioner (Certified)

Miaga Witry , RD

Dietitian, Registered

NPI 1285060749

Registered Dietitian

NPI 1285864348

Doctor of Medicine (M.D.)

Melissa Meils , MS, RD, LD

Dietitian, Registered

NPI 1427911205

Master of Science, Registered Dietitian, Licensed Dietitian

NPI 1477286193

Doctor of Dental Surgery

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

9 Historical Events
📍
Updated Business Mailing Address October 02, 2025

Registered at PO BOX 637764, CINCINNATI, OH 452637764 (Tel: 3178803939)

📍
Updated Practice Location November 12, 2021

Registered at 9443 E 38TH ST, INDIANAPOLIS, IN 462352132 (Tel: 3178902100)

📍
Updated Business Mailing Address November 12, 2021

Registered at 720 ESKENAZI AVE, FIFTH THIRD BANK BLDG, 5TH FL, INDIANAPOLIS, IN 462024166 (Tel: 3178804121)

NPI Profile Active August 19, 2011

NPI status registered as active in NPPES database

📍
Updated Practice Location August 19, 2011

Registered at 1434 SHELBY ST, INDIANAPOLIS, IN 462031945 (Tel: 3176553200)

📍
Updated Business Mailing Address August 19, 2011

Registered at 8910 PURDUE RD, STE.500, INDIANAPOLIS, IN 462683161

👤
Provider Name / Credentials Updated August 19, 2011

Recorded as MARK TIRITILLI

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) August 19, 2011

Internal Medicine (License #01043935A in IN)

🟢
Initial NPI Registration & Enumeration May 10, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1538119953
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: May 10, 2006
Last Update: October 02, 2025
Sole Proprietor: No

Mailing Address

Po Box 637764

Cincinnati, OH 452637764

Phone: 3178803939

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.