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IHA HEALTH SERVICES CORPORATION
NPI 1669955894
Family Medicine in South Lyon, MI

Active since September 13, 2018
23200 PONTIAC TRL STE 100, SOUTH LYON, MI 48178(248) 446-2935(248) 446-2936 Get Directions Write a Review

NPPES record last updated: March 23, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 23, 2026, Dec 27, 2019, Dec 12, 2018 and 1 more (4 updates tracked since 2018).

About Iha Health Services Corporation NPPES

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

IHA HEALTH SERVICES CORPORATION (NPI 1669955894), doing business as Iha South Lyon Primary Care, is a healthcare organization registered as a family medicine in South Lyon, Michigan and active in the NPI registry since September 2018. The organization lists Cynthia A Elliott, President/coo, as its authorized official.

NPPES Registry Identity

NPI1669955894
Entity TypeOrganization
Primary Taxonomy207Q00000X
Legal Business NameIHA HEALTH SERVICES CORPORATION
Location Address23200 PONTIAC TRL STE 100South Lyon, MI 48178-1983
Mailing AddressPo Box 446Ann Arbor, MI 48106-0446 · (734) 747-6766
Phone(248) 446-2935
Fax(248) 446-2936
Organization SubpartNo
Authorized OfficialCynthia A ElliottPresident/coo · (734) 327-0872
Enumeration DateSeptember 13, 2018
Last NPPES UpdateMarch 23, 20264 updates tracked since enumeration
NPPES CertifiedMarch 23, 2026
✔ NPI 1669955894 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
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.
Also ListedInternal MedicineTaxonomy 207R00000X
Also ListedPhysician AssistantTaxonomy 363A00000X
Also ListedNurse PractitionerTaxonomy 363L00000X
23200 PONTIAC TRL STE 100, South Lyon, MI 48178
Open in Google Maps ↗

Other Names 1

Doing Business AsIha South Lyon Primary Care

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Iha Health Services Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

1,476

Medicare enrollment records show 1,476 clinicians reassign Medicare billing to Iha Health Services Corporation, which bills Medicare for the services they deliver. Of these, 6 practice at this address and 114 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 52

Internal Medicine332
Nurse Practitioner250
Family Practice229
Obstetrics/Gynecology76
Hospitalist54
Clinical Social Worker50
Psychiatry47
Neurology36
44 other specialties402

Nearest to this location (20)

See all 1,476
Natalie Baer, MD
Family Practice
NPI 1912389412
23200 PONTIAC TRL STE 100
South Lyon, MI 48178
(248) 446-2935
✔ PECOS✔ Accepts MedicareSame address
Katherine Balogh
Family Practice
NPI 1497404123
23200 PONTIAC TRL
South Lyon, MI 48178
(248) 446-2935
✔ PECOS✔ Accepts MedicareSame address
Lauren Carney, DO
Family Practice
NPI 1063949121
23200 PONTIAC TRL
South Lyon, MI 48178
(248) 446-2935
✔ PECOS✔ Accepts MedicareSame address
Elizabeth Morelli, MD
Family Practice
NPI 1558395954
23200 PONTIAC TRL STE 100
South Lyon, MI 48178
(248) 446-2935
✔ PECOS✔ Accepts MedicareSame address
Martin Tinkerhess, M.D.
Family Practice
NPI 1417305129
23200 PONTIAC TRL
South Lyon, MI 48178
(248) 446-2935
✔ PECOS✔ Accepts MedicareSame address
Mark Zawisa, M.D.
Family Practice
NPI 1386612406
23200 PONTIAC TRL STE 100
South Lyon, MI 48178
(248) 466-2935
✔ PECOS✔ Accepts MedicareSame address
Martha Rumschlag, MD
Family Practice
NPI 1447251368
210 N LAFAYETTE ST
South Lyon, MI 48178
(248) 437-1744
✔ PECOS✔ Accepts Medicare0.7 mi
Katharine Lounsberry, M.D.
Family Practice
NPI 1235496951
30488 MILFORD RD
New Hudson, MI 48165
(248) 437-4625
✔ PECOS✔ Accepts Medicare4.7 mi
Matthew Kramer, LPC
Mental Health Counselor
NPI 1063199347
12851 GRAND RIVER RD
Brighton, MI 48116
(810) 227-1211
✔ PECOS✔ Accepts Medicare5.1 mi
Sara Underwood-Stankevich, FNP-C
Nurse Practitioner
NPI 1033515697
10415 GRAND RIVER RD STE 100
Brighton, MI 48116
(810) 227-1020
✔ PECOS✔ Accepts Medicare6.8 mi
Jami Lynn Matthews, D.O.
Family Practice
NPI 1225455785
5865 WHITMORE LAKE RD STE A
Brighton, MI 48116
(810) 227-1200
✔ PECOS✔ Accepts Medicare7.1 mi
Kelsey Scott, MD
Internal Medicine
NPI 1528528767
5505 S OLD US 23 STE 100
Brighton, MI 48116
(810) 494-6885
✔ PECOS✔ Accepts Medicare7.4 mi
Joshua Stewart, DPM
Podiatry
NPI 1740749548
205 W GRAND RIVER AVE STE 200
Brighton, MI 48116
(734) 572-1141
✔ PECOS✔ Accepts Medicare8.6 mi
Gwenyth Hayes, LMSW
Clinical Social Worker
NPI 1326416728
711 E GRAND RIVER AVE
Brighton, MI 48116
(517) 896-3592
✔ PECOS✔ Accepts Medicare8.9 mi
Malihe Rezazadegan, M.D
Hospitalist
NPI 1154563369
24 FRANK LLOYD WRIGHT DR
Ann Arbor, MI 48105
(734) 747-6766
✔ PECOS✔ Accepts Medicare9.4 mi
Alexis Perry, MD
Emergency Medicine
NPI 1689973851
IHA URGENT CARE 4200 WHITEHALL DRIVE
Ann Arbor, MI 48105
(734) 995-0308
✔ PECOS9.5 mi
Andrew Schwinn, DO
Urology
NPI 1144719287
IHA UROLOGY 2305 GENOA BUSINESS PARK DRIVE SUITE 120
Brighton, MI 48114
(734) 712-8100
✔ PECOS✔ Accepts Medicare9.6 mi
Brenda Herrera-Reed, MD
Hospice/Palliative Care
NPI 1770786675
24 FRANK LLOYD WRIGHT DR
Ann Arbor, MI 48105
(734) 327-0872
✔ PECOS✔ Accepts Medicare9.6 mi
Noura Nachawi, M.D.
Endocrinology
NPI 1295184174
24 FRANK LLOYD WRIGHT DR
Ann Arbor, MI 48105
(734) 647-5871
✔ PECOS✔ Accepts Medicare9.6 mi
Christopher Reynolds, MD
Hematology/Oncology
NPI 1710982533
24 FRANK LLOYD WRIGHT DRIVE SUITE J2000
Ann Arbor, MI 48105
(734) 747-6766
✔ PECOS✔ Accepts Medicare9.6 mi
See all 1,476 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Iha Health Services Corporation's NPI number?

The NPI number for Iha Health Services Corporation is 1669955894. It was assigned to this organization in the NPPES registry on September 13, 2018. The provider is doing business as IHA South Lyon Primary Care.

Where is Iha Health Services Corporation located?

Iha Health Services Corporation is located at 23200 Pontiac Trl Ste 100, South Lyon, MI 48178. The listed phone number is (248) 446-2935.

What is Iha Health Services Corporation's specialty?

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

Is Iha Health Services Corporation enrolled in Medicare?

Yes. Iha Health Services Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Iha Health Services Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1,476 clinicians in 52 Medicare specialties reassign their Medicare billing to Iha Health Services Corporation. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Internal Medicine (332), Nurse Practitioner (250) and Family Practice (229). Of these, 6 practice at this address and 114 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Iha Health Services Corporation accept?

Health plans from Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list Iha Health Services Corporation as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Iha Health Services Corporation was last updated on March 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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.