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DR. ERIN SIENKIEWICZ MD
NPI 1073930392
Obstetrics & Gynecology in Concord, MA

Active since March 25, 2014PECOS EnrolledAccepts Medicare Assignment
131 ORNAC STE 830, CONCORD, MA 01742(978) 371-1396(978) 371-8277 Get Directions Write a Review

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

About Dr. Erin Sienkiewicz Md NPPES

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

DR. ERIN SIENKIEWICZ MD (NPI 1073930392) is an individual obstetrics & gynecology provider in Concord, Massachusetts, licensed in Massachusetts (260279) and active in the NPI registry since March 2014. She is enrolled in Medicare PECOS, is affiliated with Emerson Hospital -, and is a graduate of Pennsylvania State University College Of Medicine (2014).

NPPES Registry Identity

NPI1073930392
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameDR. ERIN SIENKIEWICZCredential: MD
Location Address131 ORNAC STE 830Concord, MA 01742-4191
Mailing Address131 Ornac Ste 830Concord, MA 01742-4191 · (617) 636-5000 · Fax (978) 371-8277
Phone(978) 371-1396
Fax(978) 371-8277
Sole ProprietorNo
Medical School CMSPennsylvania State University College Of MedicineGraduated 2014
Enumeration DateMarch 25, 2014
Last NPPES UpdateFebruary 23, 2026
NPPES CertifiedFebruary 23, 2026
✔ NPI 1073930392 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in MA · 260279
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.
131 ORNAC STE 830, Concord, MA 01742
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Taro 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. Erin Sienkiewicz Md 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 ID5294087029
PECOS Enrollment IDI20181005002154
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 Erin Sienkiewicz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Afa Midwifery, Obstetrics & Gynecology
15 mi
Obstetrics & Gynecology
131 OLD ROAD TO 9 ACRE COR STE 830
Concord, MA 01742
  • Reassigned Medicare billing, Massachusetts enrollment
  • Medicare enrollment name: A.F.A. Obstetrics & Gynecology, P.C.
  • 19 clinicians in this Medicare group
NPI 1598872426 (978) 371-1396

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 2

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.
18 services11 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.
15 services15 patients

Hospital Affiliations CMS Care Compare

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

Emerson Hospital -

Acute Care Hospitals · W Concord, MA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220084
Location133 Old Road To 9 Acre CornerW Concord, MA 01742 · Middlesex County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 01742 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
$144.11 typical visit price
range $63.72 – $189.86
Typical copayment $36.02 (range $15.93 – $47.46)
Most-billed visit code 99204
Established Patient
$78.84 typical visit price
range $21.07 – $155.29
Typical copayment $19.71 (range $5.26 – $38.82)
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.

LAUREN S. CARRATU
Advanced Practice Midwife
131 ORNAC STE 830
CONCORD, MA 01742
Middlesex County (978) 371-1396

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 Erin Sienkiewicz's NPI number?

The NPI number for Erin Sienkiewicz is 1073930392. It was assigned to this individual provider in the NPPES registry on March 25, 2014.

Where is Erin Sienkiewicz located?

Erin Sienkiewicz practices at 131 Ornac Ste 830, Concord, MA 01742. The listed phone number is (978) 371-1396.

What is Erin Sienkiewicz's specialty?

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

Is Erin Sienkiewicz enrolled in Medicare?

Yes. Erin Sienkiewicz 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 Erin Sienkiewicz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Erin Sienkiewicz reassigns Medicare benefits to Afa Midwifery, Obstetrics & Gynecology (Concord, MA). 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 Erin Sienkiewicz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Erin Sienkiewicz accept?

Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Erin Sienkiewicz 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 Erin Sienkiewicz affiliated with any hospitals?

According to CMS data, Erin Sienkiewicz is affiliated with Emerson Hospital -.

When was this NPI record last updated?

The NPPES record for Erin Sienkiewicz was last updated on February 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.