Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. MARK EDWARD TILYOU M.D.
NPI 1164420717
Legal Medicine in Altoona, PA

Q: What is Mark Tilyou's NPI number?

The NPI number for Mark Tilyou is 1164420717. It was assigned to this individual provider in the NPPES registry on July 8, 2005.

Q: What is Mark Tilyou's specialty?

The primary specialty registered for this NPI is Legal Medicine with taxonomy code 173000000X.

Q: When was this NPI record last updated?

The NPPES record for Mark Tilyou was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 days 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 July 08, 2005

222 CHESTNUT AVE, ALTOONA, PA 16601(814) 946-8046(814) 946-3693 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

On this page

About Dr. Mark Edward Tilyou M.d. NPPES

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

DR. MARK EDWARD TILYOU M.D. (NPI 1164420717) is an individual legal medicine provider in Altoona, Pennsylvania, licensed in Pennsylvania (MD023252) and active in the NPI registry since July 2005.

NPPES Registry Identity

NPI1164420717

Entity TypeIndividualMale

Primary Taxonomy173000000X

Provider Legal NameDR. MARK EDWARD TILYOUCredential: M.D.

Location Address222 CHESTNUT AVEAltoona, PA 16601-4928

Mailing Address222 Chestnut AveAltoona, PA 16601-4928 · (814) 946-8046 · Fax (814) 946-3693

Phone(814) 946-8046

Fax(814) 946-3693

Sole ProprietorNo

Enumeration DateJuly 8, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1164420717 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyLegal MedicineOther Service Providers

Taxonomy Code173000000X

License✔ Licensed in PA · MD023252

Definition

The specialty areas of medicine concerned with matters of, and relations with, substantive law and legal institutions; such as the conduct of medical examinations at crime scenes, performance of autopsies, giving of expert medical testimony in judicial proceedings, medical treatment of inmates of penal institutions, the practice of trauma medicine in law enforcement settings, and other clinical practice and medical science applications in the fields of law, law enforcement, and corrections.

222 CHESTNUT AVE, Altoona, PA 16601

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Other Identifiers 1

Medicaid1009212900001PA

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.

Reported Quality Measures

Documentation of Current Medications in the Medical Record

Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.

100%27 patients5/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 2

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

DEVIN LEE PETULLA CRNP

Nurse Practitioner (Family)

222 CHESTNUT AVE
ALTOONA, PA 16601

Blair County (814) 946-8046

DOCTORS WALK-IN CARE INC.

Family Medicine

222 CHESTNUT AVE
ALTOONA, PA 16601

Blair County (814) 946-8046

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 Mark Tilyou's NPI number?

The NPI number for Mark Tilyou is 1164420717. It was assigned to this individual provider in the NPPES registry on July 8, 2005.

Where is Mark Tilyou located?

Mark Tilyou practices at 222 Chestnut Ave, Altoona, PA 16601. The listed phone number is (814) 946-8046.

What is Mark Tilyou's specialty?

The primary specialty registered for this NPI is Legal Medicine with taxonomy code 173000000X.

When was this NPI record last updated?

The NPPES record for Mark Tilyou was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 31 days 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.