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MARCUS E KOSS M.D.
NPI 1750300679
Family Medicine in Saint Clair Shores, MI

Active since July 19, 2006PECOS EnrolledAccepts Medicare Assignment
21603 E 11 MILE RD, SAINT CLAIR SHORES, MI 48081(586) 280-2100(586) 210-8808 Get Directions Write a Review

NPPES record last updated: April 14, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 14, 2022, Feb 3, 2022, Sep 11, 2019 and 1 more (4 updates tracked since 2017).

About Marcus E Koss M.d. NPPES

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

MARCUS E KOSS M.D. (NPI 1750300679) is an individual family medicine provider in Saint Clair Shores, Michigan, licensed in Michigan (4301074604) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Beaumont Hospital - Grosse Pointe, and is a graduate of Wayne State University School Of Medicine (1999).

NPPES Registry Identity

NPI1750300679
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameMARCUS E KOSSCredential: M.D.
Location Address21603 E 11 MILE RDSaint Clair Shores, MI 48081-1636
Mailing Address21603 E 11 Mile RdSaint Clair Shores, MI 48081-1636 · (586) 280-2100 · Fax (833) 496-1920
Phone(586) 280-2100
Fax(586) 210-8808
Sole ProprietorNo
Medical School CMSWayne State University School Of MedicineGraduated 1999
Enumeration DateJuly 19, 2006
Last NPPES UpdateApril 14, 20224 updates tracked since enumeration
NPPES CertifiedApril 14, 2022
✔ NPI 1750300679 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in MI · 4301074604
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.
21603 E 11 MILE RD, Saint Clair Shores, MI 48081
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Other Identifiers 3

OtherOH24993MI · Blue Cross And Blue Shield Of Michigan
OtherCB2510MI · Railroad Medicare
Other135327MI · Preferred Choices

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, Priority Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Marcus E Koss M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9638112683
PECOS Enrollment IDI20050609001035
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.

Medicare Billing Reassignments

2

Medicare enrollment records show Marcus Koss reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Essential Care Family Medicine PLLC
Same address
Family Medicine
21603 E 11 MILE RD
Saint Clair Shores, MI 48081
  • Reassigned Medicare billing, Michigan enrollment
NPI 1508519075 (586) 280-2100
Gmp Network
8.7 mi
Case Management
43411 GARFIELD RD STE A
Clinton Township, MI 48038
  • Reassigned Medicare billing, Michigan enrollment
  • 3 clinicians in this Medicare group
NPI 1619386620 (586) 842-0870

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

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
57 services19 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
34 services20 patients
Urinalysis, manual test 81002
A urinalysis is a simple, non-invasive test that checks the urine for various elements such as sugar, protein, and signs of infection. It can help detect many common conditions, including kidney disease and diabetes. The manual test involves a lab technician examining a urine sample.
21 services16 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
15 services15 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Beaumont Hospital - Grosse Pointe

Acute Care Hospitals · Grosse Pointe, MI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230089
Location468 Cadieux RdGrosse Pointe, MI 48230 · Wayne County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48081 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
$90.76 typical visit price
range $58.04 – $177.36
Typical copayment $22.69 (range $14.51 – $44.34)
Most-billed visit code 99203
Established Patient
$102.35 typical visit price
range $18.32 – $143.49
Typical copayment $25.58 (range $4.58 – $35.87)
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.

DR. ALEXANDRA C DADICH AUD
Audiologist
21603 E 11 MILE RD
SAINT CLAIR SHORES, MI 48081
Macomb County (248) 569-5985
ESSENTIAL CARE FAMILY MEDICINE PLLC
Family Medicine
21603 E 11 MILE RD
SAINT CLAIR SHORES, MI 48081
Macomb County (586) 280-2100

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 Marcus Koss's NPI number?

The NPI number for Marcus Koss is 1750300679. It was assigned to this individual provider in the NPPES registry on July 19, 2006.

Where is Marcus Koss located?

Marcus Koss practices at 21603 E 11 Mile Rd, Saint Clair Shores, MI 48081. The listed phone number is (586) 280-2100.

What is Marcus Koss's specialty?

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

Is Marcus Koss enrolled in Medicare?

Yes. Marcus Koss is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Marcus Koss's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marcus Koss reassigns Medicare benefits to 2 organizations: Essential Care Family Medicine PLLC (Saint Clair Shores, MI) and Gmp Network (Clinton Township, MI). Each 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 Marcus Koss's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marcus Koss accept?

Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company and Priority Health list Marcus Koss 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.

Is Marcus Koss affiliated with any hospitals?

According to CMS data, Marcus Koss is affiliated with Beaumont Hospital - Grosse Pointe.

When was this NPI record last updated?

The NPPES record for Marcus Koss was last updated on April 14, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.