2026 NPPES data Hospitalist Physician NPI 1962504381 M.D.
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ALEXANDER CARBO, M.D.

Hospitalist Physician in BOSTON, Massachusetts. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
45
Medicare Part D claims · 14 beneficiaries · Hospitalist Physician avg: 888
What the federal data reveals: ALEXANDER CARBO, M.D. is a Hospitalist Physician ([object Object]) practicing in BOSTON, Massachusetts with a Medicare Part D prescribing footprint of 45 claims across 14 beneficiaries .

What stands out: ALEXANDER CARBO, M.D. filed 45 Medicare Part D claims in 2023 across BOSTON, Massachusetts. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

ALEXANDER CARBO, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

ALEXANDER CARBO, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 09/05/2006

NPI 1962504381

Primary specialty

Hospitalist Physician

Mid-sized

16,825 US NPIs in this specialty

Medicare Part D claims

45 95% vs specialty avg

2023 prescription claims

Specialty avg: 888

Specialty distribution in Massachusetts

How Hospitalist Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Hospitalist Physician share within Massachusetts

1. Hospitalist Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Hospitalist Physician share within Massachusetts

Specialty board-certification context

Estimated specialty board-certified rate — Hospitalist Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Hospitalist Physician ABMS/AOA estimate

Est. board-certified rate (Hospitalist Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Hospitalist Physician) — ABMS / AOA estimate

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).

ALEXANDER CARBO, M.D. is a Hospitalist Physician provider practicing in BOSTON, Massachusetts, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1962504381. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

ALEXANDER CARBO, M.D. appears in the CMS NPPES registry as a Hospitalist Physician provider holding M.D. credentials at BIDMC - PALMER-BAKER SPAN 2ND FLOOR, BOSTON, MA, 02215, with a listed phone of (617) 754-4677. NPI 1962504381 was issued on 09/05/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CARBO most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 45 prescription claims written by this provider, covering 14 Medicare beneficiaries and totaling roughly $6K in drug spend. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 enrolled providers across 54 states and an average of 888 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

BIDMC - PALMER-BAKER SPAN 2ND FLOOR
BOSTON, MA 02215

Provider Details

NPI 1962504381
Specialty Hospitalist Physician
Credentials M.D.
Gender Male
NPI Issued 09/05/2006

Hospital and facility affiliations

Facilities where ALEXANDER CARBO, 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.

BRIGHAM AND WOMENS PHYSICIANS ORGANIZATION INC
BOSTON, MA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

License & disciplinary context — Massachusetts BORIM 2023 annual report

Aggregate state board data only — NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 — they are NOT specific to ALEXANDER CARBO, M.D.. To verify ALEXANDER CARBO, M.D.'s current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases

BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

45
Total Claims
$6K
Total Drug Cost
14
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
50
Total Day Supply
1,137
Generic Drug Cost
$4K

Patient Demographics

Average Patient Age
69.3 years
Avg HCC Risk Score
2.70

Hospitalist Physician Overview

How ALEXANDER CARBO, M.D. fits within the Hospitalist Physician landscape nationally.

16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider

ALEXANDER CARBO, M.D.'s 45 claims are below the specialty average of 888.

Nearby Hospitalist Physician Providers in Massachusetts

Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as CARBO.

Compare Hospitalist Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is ALEXANDER CARBO, M.D.'s specialty?
ALEXANDER CARBO, M.D. specializes in Hospitalist Physician and practices in BOSTON, Massachusetts. Credentials: M.D..
How much does ALEXANDER CARBO, M.D. prescribe under Medicare Part D?
In 2023, ALEXANDER CARBO, M.D. wrote 45 Medicare Part D claims totaling $6K in drug costs for 14 beneficiaries.
Where is ALEXANDER CARBO, M.D. located?
ALEXANDER CARBO, M.D. is located at BIDMC - PALMER-BAKER SPAN 2ND FLOOR, BOSTON, MA, 02215. Phone: (617) 754-4677.
What is ALEXANDER CARBO, M.D.'s NPI number?
ALEXANDER CARBO, M.D.'s National Provider Identifier (NPI) is 1962504381, issued on 09/05/2006.
How many Hospitalist Physician providers are there in the US?
There are 16,825 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
Does ALEXANDER CARBO, M.D. accept Medicare?
ALEXANDER CARBO, M.D. appears in CMS Medicare data with 45 Part D claims and 14 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ALEXANDER CARBO, M.D.'s credentials?
ALEXANDER CARBO, M.D.'s NPI is 1962504381 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

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.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
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 April 2026 (NPPES) / 2023 (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