Dr. Stephen Mcmahon , MD
Pediatrics β’ Caledonia, MI
7150 Kalamazoo Ave Se Ste A
Caledonia, MI 493169197
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
Practice Location & Contact Primary Location
7150 Kalamazoo Ave Se Ste A
Caledonia, MI 493169197
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 2 distinct additional practice-address records in Grand Rapids, MI. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Pediatrics: NPPES taxonomy is a reported classification, not proof of board certification.
Open Payments general payments, program year 2023
All general payments: $41.80 across 2 records.
By nature of payment
- Food and Beverage: $41.80 across 2 records.
Reporting-company totals
- Bristol Myers Squibb Company: $28.93 across 1 record.
- Supernus Pharmaceuticals, Inc.: $12.87 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2023 (published June 30, 2026).
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Compared with the same specialty in Caledonia and Michigan
8 active clinicians are listed under Pediatrics with a practice address in Caledonia, MI (2,181 in Michigan).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
-
Industry payments (Open Payments)
Industry payments (Open Payments) went from $47.32 in 2021 to $41.80 in 2023.
- 2021: $47.32
- 2023: $41.80
Sources: CMS Open Payments (2023), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2023 (payments made January 1 β December 31, 2023): fewer than 11 records totaling $41.80.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Bristol Myers Squibb Company |
Food and Beverage
Cash or cash equivalent
|
CAMZYOS | General | $28.93 |
| Supernus Pharmaceuticals, Inc. |
Food and Beverage
Cash or cash equivalent
|
QELBREE | General | $12.87 |
Source: CMS Open Payments, program year 2023, released June 30, 2026.
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2022-10-11NUCC Taxonomy Code: 208000000X
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Secondary Practice Locations
1545 68th St, Suite 100
Grand Rapids, MI 49508
Phone: 6165349881
4540 Kalamazoo Ave Se
Grand Rapids, MI 49508
Phone: 6168187454
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 7150 KALAMAZOO AVE SE STE A, CALEDONIA, MI 493169197 (Tel: 6168187454)
Registered at 7150 KALAMAZOO AVE SE STE A, CALEDONIA, MI 493169197 (Tel: 6168187454)
Registered at 4540 KALAMAZOO AVE SE, GRAND RAPIDS, MI 49508 (Tel: 6168187454)
Registered at 4540 KALAMAZOO AVE SE, GRAND RAPIDS, MI 495084625
NPI status registered as active in NPPES database
Registered at 1545 68TH ST, SUITE 100, GRAND RAPIDS, MI 49508 (Tel: 6165349881)
Registered at 100 MICHIGAN ST NE, MC 845, GRAND RAPIDS, MI 495032560
Recorded as STEPHEN MCMAHON, MD
Pediatrics (license number reported to NPPES: MI 4301069699)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Mailing Address
7150 Kalamazoo Ave Se Ste A
Caledonia, MI 493169197
Phone: 6168187454