NPI registry status
Active
2026 NPPES data Critical Care Medicine (Anesthesiology) Physician NPI 1255569133 M.D.
Verify on CMS → Alexandra Armstrong, M.D.
Critical Care Medicine (Anesthesiology) Physician in Greenville, South Carolina.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,454 in Critical Care Medicine (Anesthesiology) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Industry payments
$34.17
2 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Alexandra Armstrong, M.D. is a Critical Care Medicine (Anesthesiology) Physician in Greenville, South Carolina, listed in the federal CMS National Provider Identifier registry.
- Likely
- board-certified (heuristic)
- #190
- Critical Care Medicine (Anesthesiology) Physician rank among South Carolina specialties
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Federal trust snapshot
What official records show about Alexandra Armstrong, M.D.
Federal registry listing with board-eligibility signals — verify credentials with the state medical board before clinical decisions.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1255569133), first enumerated 06/30/2009.
Source: CMS NPPES
- Not in federal data
Medicare Part D participation
No 2023 Medicare Part D prescribing volume appears in the CMS public file for this NPI (may reflect specialty, new enrollment, or non-prescribing role).
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
5 CMS Care Compare hospital affiliations on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$34.17 in reported industry payments (2 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1255569133 · Critical Care Medicine (Anesthesiology) Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1255569133
- ENUM-MID 2009
- TAX-NARROW 1,454
- RX-NONE No Part D
- BOOK-THIN 23 in South Carolina
- PHOTO-ENUM Anna Hoard · 2009
✓
Board certification likely (heuristic, not verified)
Alexandra Armstrong, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 5 hospital affiliations - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Alexandra Armstrong, M.D.?
Quality data not reportedPrimary specialty
Critical Care Medicine (Anesthesiology) Physician
Specialty distribution in South Carolina
How Critical Care Medicine (Anesthesiology) Physician compares to other specialties among South Carolina providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Critical Care Medicine (Anesthesiology) Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1255569133 |
|---|---|
| Specialty | Critical Care Medicine (Anesthesiology) Physician |
| Credentials | M.D. |
| Gender | Female |
| NPI Issued | 06/30/2009 |
Hospital and facility affiliations
Facilities where Alexandra Armstrong, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
According to CMS billing records, Alexandra Armstrong, M.D. is affiliated with 5 Medicare-billing facilities.
Atlantic Coast Anesthesia Services PC
Myrtle Beach, SC
Beach Anesthesia, LLC
Columbia, SC
Musc Community Physicians
Orangeburg, SC
Prisma Health University Medical Group
Greenville, SC
Tidelands Anesthesia Group LLC
Georgetown, SC
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Alexandra Armstrong, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$34
Largest payer
Davol Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
More Critical Care Medicine (Anesthesiology) Physician in SC →
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Critical Care Medicine (Anesthesiology) Physician Overview
How Alexandra Armstrong, M.D. fits within the Critical Care Medicine (Anesthesiology) Physician landscape nationally.
1,454
Critical Care Medicine (Anesthesiology) Physician Providers in US
46
States with Critical Care Medicine (Anesthesiology) Physician
358
Avg Claims per Provider
Nationwide Critical Care Medicine (Anesthesiology) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Armstrong, both outside South Carolina so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Critical Care Medicine (Anesthesiology) Physician Providers in South Carolina
Other clinicians with the same primary specialty enrolled in South Carolina, drawn from the same CMS NPPES roster as Armstrong.
One of 23 Critical Care Medicine (Anesthesiology) Physician providers enrolled in South Carolina, 5 are shown here.
Frequently Asked Questions
What is Alexandra Armstrong, M.D.'s specialty? ▼
Alexandra Armstrong, M.D. specializes in Critical Care Medicine (Anesthesiology) Physician and practices in Greenville, South Carolina. Credentials: M.D..
Where is Alexandra Armstrong, M.D. located? ▼
Alexandra Armstrong, M.D. is located at 7 INDEPENDENCE PT STE 300, Greenville, SC, 29615. Phone: (864) 522-3700.
What is Alexandra Armstrong, M.D.'s NPI number? ▼
Alexandra Armstrong, M.D.'s National Provider Identifier (NPI) is 1255569133, issued on 06/30/2009.
How many Critical Care Medicine (Anesthesiology) Physician providers are there in the US? ▼
There are 1,454 Critical Care Medicine (Anesthesiology) Physician providers across 46 states in the US. The average Critical Care Medicine (Anesthesiology) Physician provider writes 358 Medicare Part D claims per year.
Does Alexandra Armstrong, M.D. accept Medicare? ▼
Alexandra Armstrong, M.D. appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alexandra Armstrong, M.D.'s credentials? ▼
Alexandra Armstrong, M.D.'s NPI is 1255569133 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.