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TAMMY UNDERWOOD C.N.M.
NPI 1346644267
Advanced Practice Midwife in Freehold, NJ

Active since October 21, 2014PECOS EnrolledAccepts Medicare Assignment
501 IRON BRIDGE RD STE 10, FREEHOLD, NJ 07728(732) 431-2999(732) 431-2993 Get Directions Write a Review

NPPES record last updated: August 23, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Aug 23, 2021, Jan 12, 2021 (2 updates tracked since 2021).

About Tammy Underwood C.n.m. NPPES

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

TAMMY UNDERWOOD C.N.M. (NPI 1346644267) is an individual advanced practice midwife in Freehold, New Jersey, licensed in New Jersey (25ME00073200) and active in the NPI registry since October 2014. She is enrolled in Medicare PECOS, is affiliated with Centrastate Medical Center, and maintains 4 additional practice locations.

NPPES Registry Identity

NPI1346644267
Entity TypeIndividualFemale
Primary Taxonomy367A00000X
Provider Legal NameTAMMY UNDERWOODCredential: C.N.M.
Location Address501 IRON BRIDGE RD STE 10Freehold, NJ 07728-5305
Mailing AddressPo Box 22581New York, NY 10087-2581 · (610) 482-4795 · Fax (856) 528-3117
Phone(732) 431-2999
Fax(732) 431-2993
Sole ProprietorNo
Medical School CMSOtherGraduated 2014
Enumeration DateOctober 21, 2014
Last NPPES UpdateAugust 23, 20212 updates tracked since enumeration
NPPES CertifiedAugust 23, 2021
✔ NPI 1346644267 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAdvanced Practice MidwifePhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367A00000X
Licenses✔ Licensed in NJ · 25ME00073200✔ Licensed in OH · 259607
Definition
Advanced practice midwifery encompasses the independent provision of care during pregnancy, childbirth, and the postpartum period; sexual and reproductive health; gynecologic health; and family planning services, including preconception care. Midwives also provide primary care for individuals from adolescence throughout the lifespan as well as care for the healthy newborn during the first 28 days of life. Midwives provide initial and ongoing comprehensive assessment, diagnosis, and treatment. Midwifery care includes health promotion, disease prevention, risk assessment and management, and individualized wellness education and counseling. Source: American College of Nurse-Midwives, www.midwife.org Additional Resources: See the American College of Nurse-Midwives, www.midwife.org, for more information on Certified Nurse-Midwives, Certified Midwives, the American Midwifery Certification Board (AMCB), and licensure.
501 IRON BRIDGE RD STE 10, Freehold, NJ 07728
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Secondary Practice Locations 4

Location 1312 Applegarth Rd Ste 102Monroe Twp, NJ 08831-5347 · Phone (609) 860-0600 · Fax (609) 860-0537
Location 2510 Bridge Plaza DrManalapan, NJ 07726-1745 · Phone (732) 536-5552 · Fax (732) 536-4570
Location 3245 Main St Ste AMatawan, NJ 07747-2006 · Phone (732) 566-9466 · Fax (732) 566-0343
Location 4960 S Prospect StMarion, OH 43302-6225 · Phone (740) 383-2776 · Fax (740) 383-2978

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource, 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

Tammy Underwood C.n.m. 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 ID5698098986
PECOS Enrollment IDI20210115000080
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 Reassignment

Medicare enrollment records show Tammy Underwood reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Regional Women's Health Group, LLC
45 mi
Obstetrics & Gynecology
227 LAUREL ROAD ECHELON ONE, SUITE 300
Voorhees, NJ 08043
  • Reassigned Medicare billing, New Jersey enrollment
  • Medicare enrollment name: Regional Womens Health Group LLC
  • 307 clinicians in this Medicare group
NPI 1548215536 (856) 669-6050

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.

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.
90 services90 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.
89 services89 patients
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.
57 services54 patients

Hospital Affiliations CMS Care Compare 2

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

Centrastate Medical Center

Acute Care Hospitals · Freehold, NJ
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number310111
Location901 West Main StreetFreehold, NJ 07728 · Monmouth County
Emergency services Birthing friendly

Bayshore Medical Center

Acute Care Hospitals · Holmdel, NJ
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number310112
Location727 N Beers StHolmdel, NJ 07733 · Monmouth County
Emergency services

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
$94.90 typical visit price
range $61.59 – $185.05
Typical copayment $23.72 (range $15.39 – $46.26)
Most-billed visit code 99203
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

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

ALEXANDRA MASON MARKS
Nurse Practitioner (Women's Health)
501 IRON BRIDGE RD STE 10
FREEHOLD, NJ 07728
Monmouth County (918) 399-3838

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 Tammy Underwood's NPI number?

The NPI number for Tammy Underwood is 1346644267. It was assigned to this individual provider in the NPPES registry on October 21, 2014.

Where is Tammy Underwood located?

Tammy Underwood practices at 501 Iron Bridge Rd Ste 10, Freehold, NJ 07728. The listed phone number is (732) 431-2999.

What is Tammy Underwood's specialty?

The primary specialty registered for this NPI is Advanced Practice Midwife with taxonomy code 367A00000X.

Is Tammy Underwood enrolled in Medicare?

Yes. Tammy Underwood 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 organization bills Medicare for Tammy Underwood's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Tammy Underwood reassigns Medicare benefits to Regional Women's Health Group, LLC (Voorhees, NJ). The 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 Tammy Underwood's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Tammy Underwood accept?

Health plans from CareSource and Oscar Health list Tammy Underwood 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 Tammy Underwood affiliated with any hospitals?

According to CMS data, Tammy Underwood is affiliated with Centrastate Medical Center and Bayshore Medical Center.

When was this NPI record last updated?

The NPPES record for Tammy Underwood was last updated on August 23, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.