2026 NPPES data Maternal & Fetal Medicine Physician NPI 1770564726 M.D.
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KAREN GREEN, M.D.

Maternal & Fetal Medicine Physician in WORCESTER, 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.
What the federal data reveals: KAREN GREEN, M.D. is a Maternal & Fetal Medicine Physician ([object Object]) practicing in WORCESTER, Massachusetts .

What stands out: KAREN GREEN, M.D. specializes in Maternal & Fetal Medicine Physician and practices in WORCESTER, Massachusetts, listed in the federal CMS National Provider Identifier registry. Every detail on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

KAREN GREEN, M.D. 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).

KAREN GREEN, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 11/08/2005

NPI 1770564726

Primary specialty

Maternal & Fetal Medicine Physician

Niche

2,103 US NPIs in this specialty

Specialty distribution in Massachusetts

How Maternal & Fetal Medicine Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Maternal & Fetal Medicine Physician share within Massachusetts

1. Maternal & Fetal Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Maternal & Fetal Medicine Physician share within Massachusetts

Specialty board-certification context

Estimated specialty board-certified rate — Maternal & Fetal Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Maternal & Fetal Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Maternal & Fetal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Maternal & Fetal Medicine 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).

KAREN GREEN, M.D. is a Maternal & Fetal Medicine Physician provider practicing in WORCESTER, Massachusetts, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1770564726. 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.

KAREN GREEN, M.D. appears in the CMS NPPES registry as a Maternal & Fetal Medicine Physician provider holding M.D. credentials at 119 BELMONT ST, WORCESTER, MA, 01605, with a listed phone of (508) 334-0550. NPI 1770564726 was issued on 11/08/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GREEN 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 prescribing data is not currently published for this NPI, which typically means the provider either wrote fewer than 11 Part D claims in the most recent reporting year, does not participate in Medicare, or practices in a specialty that rarely prescribes outpatient drugs. Absence of prescribing data is not a quality signal — many Maternal & Fetal Medicine Physician providers operate outside Part D entirely.

Maternal & Fetal Medicine Physician is a narrow specialty nationwide, with 2,103 enrolled providers across 52 states and an average of 75 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

119 BELMONT ST
WORCESTER, MA 01605

Provider Details

NPI 1770564726
Specialty Maternal & Fetal Medicine Physician
Credentials M.D.
Gender Female
NPI Issued 11/08/2005

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 KAREN GREEN, M.D.. To verify KAREN GREEN, 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.

Maternal & Fetal Medicine Physician Overview

How KAREN GREEN, M.D. fits within the Maternal & Fetal Medicine Physician landscape nationally.

2,103
Maternal & Fetal Medicine Physician Providers in US
52
States with Maternal & Fetal Medicine Physician
75
Avg Claims per Provider

Nearby Maternal & Fetal Medicine Physician Providers in Massachusetts

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

Compare Maternal & Fetal Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is KAREN GREEN, M.D.'s specialty?
KAREN GREEN, M.D. specializes in Maternal & Fetal Medicine Physician and practices in WORCESTER, Massachusetts. Credentials: M.D..
Where is KAREN GREEN, M.D. located?
KAREN GREEN, M.D. is located at 119 BELMONT ST, WORCESTER, MA, 01605. Phone: (508) 334-0550.
What is KAREN GREEN, M.D.'s NPI number?
KAREN GREEN, M.D.'s National Provider Identifier (NPI) is 1770564726, issued on 11/08/2005.
How many Maternal & Fetal Medicine Physician providers are there in the US?
There are 2,103 Maternal & Fetal Medicine Physician providers across 52 states in the US. The average Maternal & Fetal Medicine Physician provider writes 75 Medicare Part D claims per year.
Does KAREN GREEN, M.D. accept Medicare?
KAREN GREEN, 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 KAREN GREEN, M.D.'s credentials?
KAREN GREEN, M.D.'s NPI is 1770564726 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.
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