1. Home
  2. Directory
  3. Michigan
  4. Portage
  5. Family Medicine
  6. NPI Profile

DR. DIETMAR J GRENTZ MD
NPI 1346269586
Family Medicine in Portage, MI

Active since July 19, 2006PECOS Enrolled
2725 AIRVIEW BLVD, STE 105, PORTAGE, MI 49002(269) 349-8386(269) 349-8397 Get Directions Write a Review

NPPES record last updated: July 22, 2016. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Dietmar J Grentz Md NPPES

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

DR. DIETMAR J GRENTZ MD (NPI 1346269586) is an individual family medicine provider in Portage, Michigan, licensed in Michigan (4301069296) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1346269586
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. DIETMAR J GRENTZCredential: MD
Location Address2725 AIRVIEW BLVD, STE 105Portage, MI 49002-1803
Mailing Address7088 Green Timber CtGreenville, MI 48838-8193 · (616) 712-6436
Phone(269) 349-8386
Fax(269) 349-8397
Sole ProprietorNo
Enumeration DateJuly 19, 2006
Last NPPES UpdateJuly 22, 2016
✔ NPI 1346269586 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
Licenses✔ Licensed in MI · 4301069296✔ Licensed in MN · 39564✔ Licensed in IL · 036069689
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
2725 AIRVIEW BLVD, Portage, MI 49002
Open in Google Maps ↗

Other Identifiers 1

OtherM97310016Medicare

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Dietmar J Grentz Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 49002 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
$84.74 typical visit price
range $54.34 – $166.68
Typical copayment $21.18 (range $13.58 – $41.67)
Most-billed visit code 99203
Established Patient
$96.44 typical visit price
range $17.09 – $135.40
Typical copayment $24.11 (range $4.27 – $33.85)
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 2

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

TERRY HUBERT LEWIS NP-C
Nurse Practitioner (Family)
2725 AIRVIEW BLVD
PORTAGE, MI 49002
Kalamazoo County (269) 349-8386
DR. DIAA ALDIN H ELFAKI M.D.
Internal Medicine
2725 AIRVIEW BLVD, STE 105
PORTAGE, MI 49002
Kalamazoo County (269) 349-8386

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 Dietmar Grentz's NPI number?

The NPI number for Dietmar Grentz is 1346269586. It was assigned to this individual provider in the NPPES registry on July 19, 2006.

Where is Dietmar Grentz located?

Dietmar Grentz practices at 2725 Airview Blvd Ste 105, Portage, MI 49002. The listed phone number is (269) 349-8386.

What is Dietmar Grentz's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Dietmar Grentz enrolled in Medicare?

Yes. Dietmar Grentz is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Dietmar Grentz was last updated on July 22, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years 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.