Michael S. Kirwin, MD
Obstetrics & Gynecology Physician · Freehold, NJ
Michael S. Kirwin, MD is an obstetrics & gynecology physician with a practice address in Freehold, New Jersey, and NPI 1548286164, issued on Jul 15, 2006. Check the license (New Jersey 62235, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Michael S. Kirwin
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- 62235 NJ
MD70021880 WA
4865-320 WI
Self-reported in NPPES; status is on the state search - Practice location
- 501 Ironbridge RD, Freehold, NJ 07728
- Phone
- (732) 431-2999
- Enumerated
- Jul 15, 2006
- Record last updated
- Aug 7, 2025
- Fax
- (732) 431-2993
- Medicaid IDs
- 7141904 NJ
1548286164 WI - Medicare enrollment
- Enrolled (PECOS I20250730004696); accepts Medicare assignment
- Medical or professional school
- State University Of New York Downstate Medical Center, 1991
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,362 in New Jersey → Look up another NPI →
Also registered at 501 Ironbridge RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Dimino, MDObstetrics & Gynecology Physician1386662872
- Peter Mandel, MDObstetrics & Gynecology Physician1730259094
- Safrir Neuwirth, MDObstetrics & Gynecology Physician1871519405
- Robert Portadin, M.D.Obstetrics & Gynecology Physician1194743682
- Stefanie Spadafino, PACPhysician Assistant1386797645
Verify Michael S. Kirwin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 62235Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
128 Medicare Part D claims for 62 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol24 claims
- Alendronate Sodium19 claims
- Triamcinolone Acetonide16 claims
- Valacyclovir11 claims
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: $18.36
1 payment: food and beverage; the largest payer was Sumitomo Pharma America, Inc. The 21,429 providers of this specialty with any payment received $1,030.61 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.
Michael S. Kirwin among 1,362 obstetrics & gynecology physician records in New Jersey
Michael S. Kirwin, MD is one of 1,362 obstetrics & gynecology physician records with a practice address in New Jersey. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 49% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1991 · median 2003 among the 900 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
26 obstetrics & gynecology physician records list a practice address in Freehold
They are 26 of the 1,431 NPPES records with a practice address in Freehold, and 1,362 obstetrics & gynecology physician records in New Jersey.
All 1,362 in New Jersey → Every provider in Freehold → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Norman Back, MDFreehold, NJ 077281528055266
- Borislava Burt-Libo, D.O.Freehold, NJ 077281053532465
- Joseph Cipriano, MDFreehold, NJ 077281346295979
- Michael Dimino, MDFreehold, NJ 077281386662872
- Suzanne Frasca, DOFreehold, NJ 077281124003355
- Steven Goldstein, MDFreehold, NJ 077281790772432
- Julie Leizer, M.D.Freehold, NJ 077281780986646
- Peter Mandel, MDFreehold, NJ 077281730259094
Common questions
What is Michael S. Kirwin, MD's NPI number?
Michael S. Kirwin, MD's National Provider Identifier (NPI) is 1548286164, issued on Jul 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Michael S. Kirwin, MD located?
The NPPES record lists a practice address at 501 Ironbridge RD, Freehold, NJ, 07728. Phone: (732) 431-2999. Providers update this record themselves, so call before visiting.
How can I verify Michael S. Kirwin, MD's license?
NPPES lists New Jersey license number 62235, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Michael S. Kirwin, MD prescribe under Medicare Part D?
In 2024, Michael S. Kirwin, MD had 128 Medicare Part D claims for 62 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.