1. Home
  2. Directory
  3. Michigan
  4. Muskegon
  5. Internal Medicine
  6. NPI Profile

GREGORY H DOWNER M.D.
NPI 1285635367
Internal Medicine - Nephrology in Muskegon, MI

Active since August 10, 2005PECOS EnrolledAccepts Medicare Assignment
1250 MERCY DR, SUITE 101, MUSKEGON, MI 49444(231) 733-1912(231) 737-4603 Get Directions Write a Review

NPPES record last updated: February 17, 2014. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Gregory H Downer M.d. NPPES

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

GREGORY H DOWNER M.D. (NPI 1285635367) is an individual nephrology provider in Muskegon, Michigan, licensed in Michigan (4301048039) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, is affiliated with Spectrum Health, and is a graduate of Indiana University School Of Medicine (1981).

NPPES Registry Identity

NPI1285635367
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameGREGORY H DOWNERCredential: M.D.
Location Address1250 MERCY DR, SUITE 101Muskegon, MI 49444-1881
Mailing Address1250 Mercy Dr, Suite 101Muskegon, MI 49444-1881 · (231) 733-1912 · Fax (231) 737-4603
Phone(231) 733-1912
Fax(231) 737-4603
Sole ProprietorNo
Medical School CMSIndiana University School Of MedicineGraduated 1981
Enumeration DateAugust 10, 2005
Last NPPES UpdateFebruary 17, 2014
✔ NPI 1285635367 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in MI · 4301048039
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
1250 MERCY DR, Muskegon, MI 49444
Open in Google Maps ↗

Other Identifiers 4

Medicaid1816250MI
Medicare PIN0F16037002MI
Other382690980MI · Tax Id
Medicare UPINA78514MI

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, Oscar Insurance Company and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gregory H Downer 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 ID5890692453
PECOS Enrollment IDI20100728000564
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.

Areas of Expertise CMS Part B claims 7

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
258 services79 patients
Dialysis services, 4 or more physician visits per month (20 years or older) 90960
Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
193 services137 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
184 services150 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
80 services69 patients
Hemodialysis procedure with physician evaluation 90935
Hemodialysis is a treatment that uses a machine to filter waste and excess fluid from your blood when your kidneys can't. A physician checks your health before, during, and after the procedure to ensure it's working effectively for you.
72 services31 patients
Dialysis services, 2-3 physician visits per month (20 years or older) 90961
Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.
24 services22 patients

Hospital Affiliations CMS Care Compare 5

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

Spectrum Health

Acute Care Hospitals · Grand Rapids, MI
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230038
Location100 Michigan St NEGrand Rapids, MI 49503 · Kent County
Emergency services Birthing friendly

Trinity Health Muskegon Hospital

Acute Care Hospitals · Muskegon, MI
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230066
Location1500 E Sherman BlvdMuskegon, MI 49441 · Muskegon County
Emergency services Birthing friendly

Corewell Health Ludington Hospital

Acute Care Hospitals · Ludington, MI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number230110
LocationOne N Atkinson DriveLudington, MI 49431 · Mason County
Emergency services Birthing friendly

Mercy Health Lakeshore Campus

Critical Access Hospitals · Shelby, MI
OwnershipVoluntary non-profit - Private
CMS Certification Number231320
Location72 South State StreetShelby, MI 49455 · Oceana County
Emergency services

Corewell Health Gerber Hospital

Critical Access Hospitals · Fremont, MI
OwnershipVoluntary non-profit - Private
CMS Certification Number231338
Location212 S Sullivan StFremont, MI 49412 · Newaygo County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 49444 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
$126.15 typical visit price
range $54.34 – $166.68
Typical copayment $31.53 (range $13.58 – $41.67)
Most-billed visit code 99204
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.

Referred Medical Equipment & Supplies CMS DME claims 5

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Tacrolimus, immediate release, oral, 1 mg J7507
Treatment-Treatment - Miscellaneous · category RX029N
4 suppliers22 claims3,660 services$0.29 avg. paid by Medicare
Cyclosporine, oral, 25 mg J7515
Treatment-Treatment - Miscellaneous · category RX029N
2 suppliers11 claims1,650 services$0.58 avg. paid by Medicare
Mycophenolate mofetil, oral, 250 mg J7517
Treatment-Treatment - Miscellaneous · category RX029N
3 suppliers18 claims2,760 services$0.19 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
7 suppliers34 claims34 services$17.28 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for a subsequent prescription in a 30-day period Q0512
Treatment-Chemotherapy · category RH012N
7 suppliers29 claims31 services$12.62 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 3

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

WEST MICHIGAN NEPHROLOGY PLLC
Internal Medicine (Nephrology)
1250 MERCY DR, SUITE 101
MUSKEGON, MI 49444
Muskegon County (231) 733-1912
MARK E STANIFORTH MD
Internal Medicine (Nephrology)
1250 MERCY DR, STE 101
MUSKEGON, MI 49444
Muskegon County (231) 739-6375
DVA RENAL HEALTHCARE INC
Clinic/Center (End-Stage Renal Disease (ESRD) Treatment)
1250 MERCY DR, STE 201
MUSKEGON, MI 49444
Muskegon County (231) 737-0075

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 Gregory Downer's NPI number?

The NPI number for Gregory Downer is 1285635367. It was assigned to this individual provider in the NPPES registry on August 10, 2005.

Where is Gregory Downer located?

Gregory Downer practices at 1250 Mercy Dr Suite 101, Muskegon, MI 49444. The listed phone number is (231) 733-1912.

What is Gregory Downer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Gregory Downer enrolled in Medicare?

Yes. Gregory Downer 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.

What insurance does Gregory Downer accept?

Health plans from Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company, Oscar Insurance Company and Priority Health list Gregory Downer 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 Gregory Downer affiliated with any hospitals?

According to CMS data, Gregory Downer is affiliated with Spectrum Health, Trinity Health Muskegon Hospital, Corewell Health Ludington Hospital, Mercy Health Lakeshore Campus and Corewell Health Gerber Hospital.

When was this NPI record last updated?

The NPPES record for Gregory Downer was last updated on February 17, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.