2026 NPPES data Rheumatology Physician NPI 1649376377 MD
Verify on CMS →

CAROLINE EYVAZZADEH, MD

Rheumatology 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
15
Medicare Part D claims · Rheumatology Physician avg: 2K
What the federal data reveals: CAROLINE EYVAZZADEH, MD is a Rheumatology Physician ([object Object]) practicing in BOSTON, Massachusetts with a Medicare Part D prescribing footprint of 15 claims .

What stands out: CAROLINE EYVAZZADEH, MD filed 15 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-eligible specialty (heuristic — not verified)

CAROLINE EYVAZZADEH, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

CAROLINE EYVAZZADEH, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 09/16/2006

NPI 1649376377

Primary specialty

Rheumatology Physician

Mid-sized

6,181 US NPIs in this specialty

Medicare Part D claims

15 99% vs specialty avg

2023 prescription claims

Specialty avg: 2,054

Specialty distribution in Massachusetts

How Rheumatology Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Rheumatology Physician share within Massachusetts

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Rheumatology 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).

CAROLINE EYVAZZADEH, MD is a Rheumatology Physician provider practicing in BOSTON, Massachusetts, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1649376377. 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.

CAROLINE EYVAZZADEH, MD appears in the CMS NPPES registry as a Rheumatology Physician provider holding MD credentials at 150 S HUNTINGTON AVE, BOSTON, MA, 02130, with a listed phone of (617) 232-9500. NPI 1649376377 was issued on 09/16/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what EYVAZZADEH 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 15 prescription claims written by this provider, covering N/A Medicare beneficiaries and totaling roughly $341 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.

Rheumatology Physician is a mid-sized specialty nationwide, with 6,181 enrolled providers across 52 states and an average of 2,054 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

150 S HUNTINGTON AVE
BOSTON, MA 02130

Provider Details

NPI 1649376377
Specialty Rheumatology Physician
Credentials MD
Gender Female
NPI Issued 09/16/2006

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 CAROLINE EYVAZZADEH, MD. To verify CAROLINE EYVAZZADEH, MD'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.

15
Total Claims
$341
Total Drug Cost
N/A
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
36
Total Day Supply
1,061
Brand Drug Cost
$0
Generic Drug Cost
$341

Patient Demographics

Average Patient Age
80.3 years
Avg HCC Risk Score
1.04

Rheumatology Physician Overview

How CAROLINE EYVAZZADEH, MD fits within the Rheumatology Physician landscape nationally.

6,181
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,054
Avg Claims per Provider

CAROLINE EYVAZZADEH, MD's 15 claims are below the specialty average of 2,054.

Nearby Rheumatology Physician Providers in Massachusetts

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

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

Frequently Asked Questions

What is CAROLINE EYVAZZADEH, MD's specialty?
CAROLINE EYVAZZADEH, MD specializes in Rheumatology Physician and practices in BOSTON, Massachusetts. Credentials: MD.
How much does CAROLINE EYVAZZADEH, MD prescribe under Medicare Part D?
In 2023, CAROLINE EYVAZZADEH, MD wrote 15 Medicare Part D claims totaling $341 in drug costs for N/A beneficiaries.
Where is CAROLINE EYVAZZADEH, MD located?
CAROLINE EYVAZZADEH, MD is located at 150 S HUNTINGTON AVE, BOSTON, MA, 02130. Phone: (617) 232-9500.
What is CAROLINE EYVAZZADEH, MD's NPI number?
CAROLINE EYVAZZADEH, MD's National Provider Identifier (NPI) is 1649376377, issued on 09/16/2006.
How many Rheumatology Physician providers are there in the US?
There are 6,181 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,054 Medicare Part D claims per year.
Does CAROLINE EYVAZZADEH, MD accept Medicare?
CAROLINE EYVAZZADEH, MD appears in CMS Medicare data with 15 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CAROLINE EYVAZZADEH, MD's credentials?
CAROLINE EYVAZZADEH, MD's NPI is 1649376377 with credentials MD. 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