Mark Tiritilli
NPI 1538119953 · Internal Medicine Physician · Indianapolis, IN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Tiritilli is a Internal Medicine Physician provider in Indianapolis, IN (NPI 1538119953).
Provider details
- NPI number
- 1538119953
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 01043935A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 129 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 349 | 111 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 333 | 64 |
| Amlodipine Besylate | 296 | 84 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 262 | 31 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 204 | 25 |
| Gabapentin | 177 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-10
- Last updated
- 2025-10-02
- Certified
- 2025-10-02
Frequently asked questions
- What is Mark Tiritilli's NPI number?
- Mark Tiritilli's National Provider Identifier (NPI) is 1538119953, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Tiritilli's specialty?
- Mark Tiritilli is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Tiritilli located?
- Mark Tiritilli's practice location on file with NPPES is 9443 E 38th St, Indianapolis, IN 46235-2132.
- What is Mark Tiritilli's phone number?
- The practice phone number listed in the NPPES registry for Mark Tiritilli is (317) 890-2100.
- Does Mark Tiritilli accept Medicare?
- Mark Tiritilli is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Tiritilli's NPI active?
- Yes — Mark Tiritilli's NPI (1538119953) is active in the NPPES registry as of the last update on 2025-10-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.