Ciara Brennan
Internal Medicine Physician · Grand Rapids, MI
Ciara Brennan is an internal medicine physician with a practice address in Grand Rapids, Michigan, and NPI 1427600204, issued on Jul 12, 2019. Check the license (Michigan 4351053113, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.
- Name
- Ciara Brennan
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 4351053113 MI
Self-reported in NPPES; status is on the state search - Practice location
- 275 Michigan St NE, Grand Rapids, MI 49503
- Phone
- (616) 391-3777
- Enumerated
- Jul 12, 2019
- Record last updated
- May 20, 2026
- Fax
- (616) 391-3755
- Entity
- Type 1 · individual
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A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ciara Brennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
Search for license 4351053113Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average internal medicine physician in 2024
104 Medicare Part D claims for 26 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $16.63
1 payment: food and beverage; the largest payer was Incyte Corporation. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Ciara Brennan among 5,735 internal medicine physician records in Michigan
Ciara Brennan is one of 5,735 internal medicine physician records with a practice address in Michigan. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 76% of them.
- NPI issued2019 · 76% of these records are older, 21% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2026 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Michigan practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
451 internal medicine physician records list a practice address in Grand Rapids
They are 451 of the 18,005 NPPES records with a practice address in Grand Rapids, and 5,735 internal medicine physician records in Michigan.
All 5,735 in Michigan → Every provider in Grand Rapids → Internal Medicine Physician nationwide →
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Common questions
What is Ciara Brennan's NPI number?
Ciara Brennan's National Provider Identifier (NPI) is 1427600204, issued on Jul 12, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Ciara Brennan located?
The NPPES record lists a practice address at 275 Michigan St NE, Grand Rapids, MI, 49503. Phone: (616) 391-3777. Providers update this record themselves, so call before visiting.
How can I verify Ciara Brennan's license?
NPPES lists Michigan license number 4351053113, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ciara Brennan prescribe under Medicare Part D?
In 2024, Ciara Brennan had 104 Medicare Part D claims for 26 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.