MARK J TIESZEN (MD) – Critical Care Medicine (Internal Medicine) Physician, NPI 1003838681

Critical Care Medicine (Internal Medicine) Physician

MARK J TIESZEN (MD) is a healthcare provider. based in Kalamazoo, Michigan. specializing in Critical Care Medicine (Internal Medicine) Physician. They hold the professional credentials MD. They hold a License No. 4301108689 (MI). The NPI Number for MARK J TIESZEN (MD) is 1003838681

Main info

Male

38 Years Of Experience

Accepts Medicare Assignment

Name

MARK J TIESZEN (MD)

NPI

1003838681

Phone

(269) 341-7762

Address

601 John St

Enumeration Date

24 July 2006

Last Update Date

17 March 2018

Doctor Profile

Medical School Name

SANFORD SCHOOL OF MEDICINE OF UNIVERSITY OF SOUTH DAKOTA

Secondary Phone

6162527200

Graduation Year

1988 (38 years ago)

PAC ID

3476677253

Group Practice PAC ID

5597651836

Professional Enrollment ID

I20160121002336

Data current as of

19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology

Experience66

Completeness75

Years active:19State licenses:2Digital endpointsOther names

Provider Addresses for MARK J TIESZEN (MD)

601 John St
Suite M-510
Kalamazoo, MI 490075341
Phone: (269) 341-7762
Fax: (269) 341-8098
Type: Location
Metro Health Hospital, 5900, Byron Center Avenue Southwest, Wyoming, Kent County, Michigan, 49519, United States
MEDICAL ADMINISTRATION
WYOMING, MI 495199606
Phone: (616) 252-3243
Fax: (616) 252-0260
Type: Mailing

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

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Medicare Enrollment & Revalidation

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Educational use only—not medical, billing, or legal advice.

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Medicare Utilization (FFS)

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No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 49007)

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Provider's Procedures

MARK J TIESZEN (MD) performs procedures in Critical Care Medicine (Internal Medicine) Physician. See the list of HCPCS codes below.

Specialty	Practice State	HCPCS Code	Description	Service Count	Beneficiary Count
CRITICAL CARE (INTENSIVISTS)	MI	36556	Insertion of central venous catheter for infusion, patient 5 years or older	31	29

Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.

PAC ID: 5597651836View full group profile

Name	Specialty	State
MATTHEW AARON ERCK (DO)	Internal Medicine	MI
CASSANDRA PAIGE FRITCH (NP)	Nurse Practitioner	MI
REBECCA S ZERIAL (PA-C)	Physician Assistant	MI
DR. NATALIE KENT (D.O.)	Hospitalist, Internal Medicine	MI
KRISTINE NICOLE TOMLINSON-MILES (NP)	-	MI
DR. MATTHEW WESLEY MEDLEY (DO)	Family Practice	MI
MR. TYLER JOHN SCHAEFER (PA-C)	Physician Assistant	MI
SUSAN K HICKS (D.O.)	-	MI
ASHLEY A WILDA (PA-C)	Physician Assistant	MI
LUCAN WATT CHATTERLEY (DO)	Family Practice	MI

Reviews

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Frequently asked questions

Can I verify MARK J TIESZEN (MD) with an NPI only?

You can start verification with NPI 1003838681 for MARK J TIESZEN (MD), then check state licensing separately.

Can I rely on MARK J TIESZEN (MD) being an active provider?

As of the registry snapshot, MARK J TIESZEN (MD) is marked active.

What is MARK J TIESZEN (MD)'s primary classification?

Critical Care Medicine (Internal Medicine) Physician is the headline specialty for MARK J TIESZEN (MD) here. Clinical services aligned with this taxonomy classification.

What area does MARK J TIESZEN (MD) serve?

MARK J TIESZEN (MD)'s listing highlights Kalamazoo, Michigan; more addresses can appear in NPPES.

Is the information about MARK J TIESZEN (MD) up to date?

Data updates when providers file changes in NPPES — treat critical facts as "verify if unsure."