Quick answers
- Does Barbara Mercado-Stallard accept Medicare assignment?
- Yes. Medicare's clinician data says Barbara Mercado-Stallard accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Barbara Mercado-Stallard see?
- In 2024, CMS data shows 109 Original Medicare patients and 235 services for Barbara Mercado-Stallard. This counts Original Medicare only and measures volume, not quality.
- What is Barbara Mercado-Stallard's NPI number?
- 1396734497. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Barbara Mercado-Stallard, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 109 |
|---|---|
| Services billed to Medicare | 235 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)62 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)58 services
- Cervical or vaginal cancer screening; pelvic and clinical breast examination (G0101)31 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)16 services
- Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory (Q0091)11 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure60%
- High cholesterol53%
- Arthritis44%
- Anxiety31%
- Depression21%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)18%
Hospitals where Barbara Mercado-Stallard works
Medicare's Facility Affiliation Data lists Barbara Mercado-Stallard at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Mount Desert Island HospitalBar Harbor, ME · Critical Access Hospital · Emergency services: listed by Medicare · CCN 201304
- Northern Light Blue Hill Memorial HospitalBlue Hill, ME · Critical Access Hospital · Emergency services: listed by Medicare · CCN 201300
- Northern Light Eastern Maine Medical CenterBangor, ME · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 200033
- Northern Light Maine Coast HospitalEllsworth, ME · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 200050
- St Joseph HospitalBangor, ME · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 200001
Practice locations
Addresses where Barbara Mercado-Stallard is enrolled with Medicare (CMS data updated October 2, 2026).
- 417 State St, Suite 442Bangor, ME 04401 (207) 973‑5200
- 489 State StBangor, ME 04401 (207) 973‑7000
- 50 Union St, Suite 3200Ellsworth, ME 04605 (207) 664‑5650
Group practices
Medicare enrollment lists Barbara Mercado-Stallard as a member of these groups (CMS data updated October 2, 2026).
- Eastern Maine Medical Center624 clinicians in the group
- Maine Coast Regional Health Facilities66 clinicians in the group
Specialties
- Obstetrics/Gynecologyprimary
Other OB-GYNs in Bangor
Clinicians with the same Medicare primary specialty in Bangor, ME — not a recommendation.
Other clinicians in Eastern Maine Medical Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Icahn School Of Medicine At Mount Sinai |
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1396734497 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians