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DR. MARY M. NATH M.D.
NPI 1427222751
Obstetrics & Gynecology in Perth Amboy, NJ

Active since April 17, 2008PECOS EnrolledAccepts Medicare AssignmentCLIA 31D1104827 · Waiver
516 LAWRIE ST, PERTH AMBOY, NJ 08861(732) 442-7500 Get Directions Write a Review

NPPES record last updated: June 3, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Jun 3, 2025, May 8, 2024 (2 updates tracked since 2024).

About Dr. Mary M. Nath M.d. NPPES

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

DR. MARY M. NATH M.D. (NPI 1427222751) is an individual obstetrics & gynecology provider in Perth Amboy, New Jersey, licensed in New Jersey (25MA07789000) and active in the NPI registry since April 2008. She is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through August 19, 2027, and is affiliated with Raritan Bay Medical Center.

NPPES Registry Identity

NPI1427222751
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. MARY M. NATHCredential: M.D.
Location Address516 LAWRIE STPerth Amboy, NJ 08861-3046
Mailing Address8403 Hana RdEdison, NJ 08817-2003 · (732) 442-7500
Phone(732) 442-7500
Sole ProprietorYes
Medical School CMSOtherGraduated 1987
Enumeration DateApril 17, 2008
Last NPPES UpdateJune 3, 20252 updates tracked since enumeration
NPPES CertifiedJune 3, 2025
✔ NPI 1427222751 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in NJ · 25MA07789000
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.
516 LAWRIE ST, Perth Amboy, NJ 08861
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Secondary Practice Location 1

Location 1530 New Brunswick AvePerth Amboy, NJ 08861-3654 · Phone (732) 442-7500

Other Identifiers 1

Medicaid0170739NJ

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, 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 and accepts Medicare assignment

Dr. Mary M. Nath 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 ID1456314376
PECOS Enrollment IDI20041110001092
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

2

Medicare enrollment records show Mary Nath reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

M & d Ob-Gyn Care Inc
Same address
Family Planning, Non-Surgical
516 LAWRIE ST
Perth Amboy, NJ 08861
  • Reassigned Medicare billing, New Jersey enrollment
NPI 1114398641 (732) 576-1500
Hackensack Meridian Health Medical Group - Specialty Care PC
16 mi
Surgical Critical Care
331 NEWMAN SPRINGS RD STE 220
Red Bank, NJ 07701
  • Reassigned Medicare billing, New Jersey enrollment
  • 2,844 clinicians in this Medicare group
NPI 1215989249 (732) 807-0800

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 31D1104827

Mary M Nath, MD · Perth Amboy, NJ
Active · expires Aug 19, 2027
CLIA Number31D1104827
Laboratory TypePhysician Office
Certificate Effective DateAugust 20, 2025
Certificate Expiration DateAugust 19, 2027
Laboratory DirectorMary M. Nath
Laboratory Phone(732) 442-7500
Laboratory LocationMary M Nath, MD516 Lawrie Street, Perth Amboy, NJ 08861
CLIA data matches this NPI record on: Address Phone
This certificate is issued to a laboratory to perform only waived tests.

Hospital Affiliations CMS Care Compare

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

Raritan Bay Medical Center

Acute Care Hospitals · Perth Amboy, NJ
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number310039
Location530 New Brunswick AvePerth Amboy, NJ 08861 · Middlesex County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 08861 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
$144.86 typical visit price
range $63.84 – $190.92
Typical copayment $36.21 (range $15.96 – $47.73)
Most-billed visit code 99204
Established Patient
$79.09 typical visit price
range $20.97 – $155.92
Typical copayment $19.77 (range $5.24 – $38.98)
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 4

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

M&D OB-GYN CARE INC
Clinic/Center (Family Planning, Non-Surgical)
516 LAWRIE ST
PERTH AMBOY, NJ 08861
Middlesex County (732) 576-1500
RARITAN BAY MEDICAL CENTER PROFESSIONAL SERVICES
Specialist
516 LAWRIE ST
PERTH AMBOY, NJ 08861
Middlesex County (732) 324-3360
KAROLINE ANDREA REINOSO PA-C
Physician Assistant
516 LAWRIE ST
PERTH AMBOY, NJ 08861
Middlesex County (732) 549-4747
ALEXANDRA C CARACITAS DO
Family Medicine
516 LAWRIE ST
PERTH AMBOY, NJ 08861
Middlesex County (732) 324-4860

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 Mary Nath's NPI number?

The NPI number for Mary Nath is 1427222751. It was assigned to this individual provider in the NPPES registry on April 17, 2008.

Where is Mary Nath located?

Mary Nath practices at 516 Lawrie St, Perth Amboy, NJ 08861. The listed phone number is (732) 442-7500.

What is Mary Nath's specialty?

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

Is Mary Nath enrolled in Medicare?

Yes. Mary Nath 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.

Which organizations bill Medicare for Mary Nath's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mary Nath reassigns Medicare benefits to 2 organizations: M & d Ob-Gyn Care Inc (Perth Amboy, NJ) and Hackensack Meridian Health Medical Group - Specialty Care PC (Red Bank, NJ). 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 Mary Nath's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Does Mary Nath hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 31D1104827) is associated with this NPI, valid through August 19, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Mary Nath accept?

Health plans from Ambetter Health and Oscar Health list Mary Nath 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 Mary Nath affiliated with any hospitals?

According to CMS data, Mary Nath is affiliated with Raritan Bay Medical Center.

When was this NPI record last updated?

The NPPES record for Mary Nath was last updated on June 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.