Erin Sienkiewicz, MD
Obstetrics & Gynecology Physician · Concord, MA
Erin Sienkiewicz, MD is an obstetrics & gynecology physician with a practice address in Concord, Massachusetts, and NPI 1073930392, issued on Mar 25, 2014. Check the license (Massachusetts 260279, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Erin Sienkiewicz
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 260279 MA
Self-reported in NPPES; status is on the state search - Practice location
- 131 Ornac Ste 830, Concord, MA 01742
- Phone
- (978) 371-1396
- Enumerated
- Mar 25, 2014
- Record last updated
- Feb 23, 2026
- Fax
- (978) 371-8277
- Medicare enrollment
- Enrolled (PECOS I20181005002154); accepts Medicare assignment
- Medical or professional school
- Pennsylvania State University College Of Medicine, 2014
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,127 in Massachusetts → Look up another NPI →
Also registered at 131 Ornac Ste 830
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lauren CarratuAdvanced Practice Midwife1780169599
Verify Erin Sienkiewicz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 260279Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
69 Medicare Part D claims for 34 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Estradiol32 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: $260.64
6 payments; by number, the most common kind was food and beverage; the largest payer was Gynesonics, 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.
Bills Medicare through one group practice
- A.f.a. Obstetrics And Gynecology, P.C.Concord, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Erin Sienkiewicz among 1,127 obstetrics & gynecology physician records in Massachusetts
Erin Sienkiewicz, MD is one of 1,127 obstetrics & gynecology physician records with a practice address in Massachusetts. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 76% of them.
- NPI issued2014 · 76% of these records are older, 21% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2014 · median 2004 among the 715 with a school on file
- Record last updated2026 · 64% 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 Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
12 obstetrics & gynecology physician records list a practice address in Concord
They are 12 of the 1,078 NPPES records with a practice address in Concord, and 1,127 obstetrics & gynecology physician records in Massachusetts.
All 1,127 in Massachusetts → Every provider in Concord → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Ingrid Balcomb, MDConcord, MA 017421275519340
- Jamie Bond, M.D.Concord, MA 017421730171943
- Timothy Hale, M.D.Concord, MA 017421811955628
- Kenneth Hekman, M.D.Concord, MA 017421790806941
- Avra Jordano-Alter, M.D.Concord, MA 017421104818392
- Dorothea LetnerConcord, MA 017421669931929
- Jeffrey Riley, MDConcord, MA 017421245216894
- Richard Rubin, MDConcord, MA 017421326062019
Common questions
What is Erin Sienkiewicz, MD's NPI number?
Erin Sienkiewicz, MD's National Provider Identifier (NPI) is 1073930392, issued on Mar 25, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Erin Sienkiewicz, MD located?
The NPPES record lists a practice address at 131 Ornac Ste 830, Concord, MA, 01742. Phone: (978) 371-1396. Providers update this record themselves, so call before visiting.
How can I verify Erin Sienkiewicz, MD's license?
NPPES lists Massachusetts license number 260279, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Erin Sienkiewicz, MD prescribe under Medicare Part D?
In 2024, Erin Sienkiewicz, MD had 69 Medicare Part D claims for 34 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.