Barbara Mercado-Stallard, MD
Obstetrics & Gynecology Physician · Ellsworth, ME
Barbara Mercado-Stallard, MD is an obstetrics & gynecology physician with a practice address in Ellsworth, Maine, and NPI 1396734497, issued on Oct 20, 2005. Check the license on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Barbara Mercado-Stallard
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 0101059310 VA
Self-reported in NPPES; status is on the state search - Practice location
- 50 Union St Ste 3200, Ellsworth, ME 04605
- Phone
- (207) 664-5650
- Enumerated
- Oct 20, 2005
- Record last updated
- Jan 30, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (207) 664-5651
- Medicaid ID
- 6213847 VA
- Medicare enrollment
- Enrolled (PECOS I20171009000998); accepts Medicare assignment
- Medical or professional school
- Icahn School Of Medicine At Mount Sinai, 1995
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 205 in Maine → Look up another NPI →
Also registered at 50 Union St Ste 3200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ruth Hope, CNM/APRNAdvanced Practice Midwife1427389741
Verify Barbara Mercado-Stallard in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in MedicineCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
319 Medicare Part D claims for 129 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Estradiol144 claims
- Clobetasol Propionate35 claims
- Estradiol-Norethindrone Acetat15 claims
- Estradiol (Twice Weekly)13 claims
- Premarin13 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: $22.02
1 payment: food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals 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 2 group practices
- Eastern Maine Medical CenterBangor, ME
- Maine Coast Regional Health FacilitiesEllsworth, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Barbara Mercado-Stallard among 205 obstetrics & gynecology physician records in Maine
Barbara Mercado-Stallard, MD is one of 205 obstetrics & gynecology physician records with a practice address in Maine. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 89% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1995 · median 2007 among the 119 with a school on file
- Record last updated2018 · 55% 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 Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Maine
There are 205 obstetrics & gynecology physician records in Maine.
All 205 in Maine → Every provider in Ellsworth → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Eugenia Kolkas, MDEllsworth, ME 046051770698227
- Kristen McNulty, MDEllsworth, ME 046051699764266
- Richard Littlefield, DOBlue Hill, ME 046141962462051
- Kathleen OberBlue Hill, ME 046141255440491
- Robert Walker, MDBlue Hill, ME 046141538105614
- Kara Dwight, DOMachias, ME 046541689674947
- Jacqueline Brown, MDDamariscotta, ME 045431396729851
- Deborah Eisenberg, MDDamariscotta, ME 045431275679938
Common questions
What is Barbara Mercado-Stallard, MD's NPI number?
Barbara Mercado-Stallard, MD's National Provider Identifier (NPI) is 1396734497, issued on Oct 20, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Barbara Mercado-Stallard, MD located?
The NPPES record lists a practice address at 50 Union St Ste 3200, Ellsworth, ME, 04605. Phone: (207) 664-5650. Providers update this record themselves, so call before visiting.
How can I verify Barbara Mercado-Stallard, MD's license?
Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Barbara Mercado-Stallard, MD prescribe under Medicare Part D?
In 2024, Barbara Mercado-Stallard, MD had 319 Medicare Part D claims for 129 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.