MICHAEL S KIRWIN MD
NPI 1548286164
Obstetrics & Gynecology in Freehold, NJ

Q: What is Michael Kirwin's NPI number?

The NPI number for Michael Kirwin is 1548286164. It was assigned to this individual provider in the NPPES registry on July 15, 2006.

Q: What is Michael Kirwin's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Q: When was this NPI record last updated?

The NPPES record for Michael Kirwin was last updated on August 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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.

Active since July 15, 2006PECOS Enrolled

501 IRONBRIDGE RD, STE 10, FREEHOLD, NJ 07728(732) 431-2999(732) 431-2993 Get Directions Write a Review

NPPES record last updated: August 7, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 7, 2025, Jul 12, 2021 (2 updates tracked since 2021).

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About Michael S Kirwin Md NPPES

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

MICHAEL S KIRWIN MD (NPI 1548286164) is an individual obstetrics & gynecology provider in Freehold, New Jersey, licensed in New Jersey (62235) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1548286164

Entity TypeIndividualMale

Primary Taxonomy207V00000X

Provider Legal NameMICHAEL S KIRWINCredential: MD

Location Address501 IRONBRIDGE RD, STE 10Freehold, NJ 07728

Mailing AddressPo Box 22581New York, NY 10087-2581 · (856) 669-6050 · Fax (856) 651-0794

Phone(732) 431-2999

Fax(732) 431-2993

Sole ProprietorNo

Enumeration DateJuly 15, 2006

Last NPPES UpdateAugust 7, 20252 updates tracked since enumeration

NPPES CertifiedAugust 7, 2025

✔ NPI 1548286164 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians

Taxonomy Code207V00000X

Licenses✔ Licensed in NJ · 62235✔ Licensed in WI · 4865-320✔ Licensed in WA · MD70021880

Definition

An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.

501 IRONBRIDGE RD, Freehold, NJ 07728

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Secondary Practice Locations 2

Location 13400 E Racine StJanesville, WI 53546-2344 · Phone (608) 373-8000 · Fax (608) 371-8928

Location 2433 E 8th StPort Angeles, WA 98362-6219 · Phone (360) 565-0999 · Fax (360) 565-0591

Other Identifiers 2

Medicaid7141904NJ

Medicaid1548286164WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Michael S Kirwin Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

Medicare enrollment records show Michael Kirwin reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Monmouth Family Health Center Inc

17 mi

Federally Qualified Health Center (FQHC)

335 BROADWAY
Long Branch, NJ 07740

Reassigned Medicare billing, New Jersey enrollment
37 clinicians in this Medicare group

NPI 1962841502 (732) 923-7100

Barnabas Health Medical Group PC

30 mi

Specialist

225 WILLIAMSON ST
Elizabeth, NJ 07202

Reassigned Medicare billing, New Jersey enrollment
1,894 clinicians in this Medicare group

NPI 1841557246 (888) 724-7123

Dean Health Systems, Inc

804 mi

Allergy & Immunology

1211 FISH HATCHERY RD
Madison, WI 53715

Reassigned Medicare billing, Wisconsin enrollment
1,377 clinicians in this Medicare group

NPI 1053358846 (608) 252-8000

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 3

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.

42 services35 patients

Cervical or vaginal cancer screening; pelvic and clinical breast examination G0101

This procedure involves checking for health issues in the lower abdomen and chest area. It helps identify early signs of certain conditions, increasing the chance for successful treatment. It's a routine check-up that's important for maintaining good health.

38 services38 patients

Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory Q0091

A Papanicolaou smear, often called a Pap smear, is a test to check for changes in cells. A small sample is gently collected from the lower region and sent to a lab for examination. This helps in early detection of potential health issues.

29 services29 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 07728 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

$140.34 typical visit price

range $61.59 – $185.05

Typical copayment $35.08 (range $15.39 – $46.26)

Most-billed visit code 99204

Established Patient

$76.45 typical visit price

range $20.08 – $150.98

Typical copayment $19.11 (range $5.02 – $37.74)

Most-billed visit code 99213

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 6

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

ROBERT ANDREW PORTADIN M.D.

Obstetrics & Gynecology

501 IRONBRIDGE RD, SUITE 10
FREEHOLD, NJ 07728

Monmouth County (732) 431-2999

MICHAEL L DIMINO MD

Obstetrics & Gynecology

501 IRONBRIDGE RD, STE 10
FREEHOLD, NJ 07728

Monmouth County (732) 431-2999

STEFANIE SPADAFINO PAC

Physician Assistant

501 IRONBRIDGE RD, SU 10
FREEHOLD, NJ 07728

Monmouth County (732) 431-2999

WOMEN'S PHYSICIANS & SURGEONS, PA

Obstetrics & Gynecology

501 IRONBRIDGE RD, SUITE 10
FREEHOLD, NJ 07728

Monmouth County (732) 431-2999

PETER COREY MANDEL MD

Obstetrics & Gynecology

501 IRONBRIDGE RD, SUITE 10
FREEHOLD, NJ 07728

Monmouth County (732) 431-2999

SAFRIR NEUWIRTH MD

Obstetrics & Gynecology

501 IRONBRIDGE RD, SUITE 10
FREEHOLD, NJ 07728

Monmouth County (732) 431-2999

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 Michael Kirwin's NPI number?

The NPI number for Michael Kirwin is 1548286164. It was assigned to this individual provider in the NPPES registry on July 15, 2006.

Where is Michael Kirwin located?

Michael Kirwin practices at 501 Ironbridge Rd Ste 10, Freehold, NJ 07728. The listed phone number is (732) 431-2999.

What is Michael Kirwin's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Michael Kirwin enrolled in Medicare?

Yes. Michael Kirwin is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Michael Kirwin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michael Kirwin reassigns Medicare benefits to 3 organizations: Monmouth Family Health Center Inc (Long Branch, NJ), Barnabas Health Medical Group PC (Elizabeth, NJ) and Dean Health Systems, Inc (Madison, WI). 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 Michael Kirwin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Michael Kirwin accept?

Health plans from Oscar Health list Michael Kirwin 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.

When was this NPI record last updated?

The NPPES record for Michael Kirwin was last updated on August 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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.