2026 NPPES data Obstetrics & Gynecology Nurse Practitioner NPI 1316935455 NP
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MARY DARCY, NP

Obstetrics & Gynecology Nurse Practitioner in MEDFORD, 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
223
Medicare Part D claims · 80 beneficiaries · Obstetrics & Gynecology Nurse Practitioner avg: 232
Generic prescribing
85%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$56.19
3 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

MARY DARCY, NP filed 223 Medicare Part D claims in 2023 as a Obstetrics & Gynecology Nurse Practitioner in MEDFORD, Massachusetts, prescribing 85% generic.

223
Part D claims, 2023
85%
generic prescribing
$56.19
industry payments (Sunshine Act)

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.

MARY DARCY, NP's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

223 49th percentile higher than 49% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

What does the federal data show about MARY DARCY, NP?

Quality data not reported

NPI registry status

Active

Issued 10/12/2005

NPI 1316935455

Primary specialty

Obstetrics & Gynecology Nurse Practitioner

Niche

2,864 US NPIs in this specialty

Medicare Part D claims

223 4% vs specialty avg

2023 prescription claims

Specialty avg: 232

Specialty distribution in Massachusetts

How Obstetrics & Gynecology Nurse Practitioner compares to other specialties among Massachusetts providers

Massachusetts providers

Obstetrics & Gynecology Nurse Practitioner share within Massachusetts

1. Obstetrics & Gynecology Nurse Practitioner42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Obstetrics & Gynecology Nurse Practitioner share within Massachusetts

Specialty board-certification context

Estimated specialty board-certified rate — Obstetrics & Gynecology Nurse Practitioner (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Obstetrics & Gynecology Nurse Practitioner ABMS/AOA estimate

Est. board-certified rate (Obstetrics & Gynecology Nurse Practitioner) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Obstetrics & Gynecology Nurse Practitioner) — 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).

MARY DARCY, NP appears in the CMS NPPES registry as a Obstetrics & Gynecology Nurse Practitioner provider holding NP credentials at 101 MAIN ST, MEDFORD, MA, 02155, with a listed phone of (781) 395-6000. NPI 1316935455 was issued on 10/12/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DARCY 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 223 prescription claims written by this provider, covering 80 Medicare beneficiaries and totaling roughly $17K in drug spend, split 15% brand-name and 85% generic by claim count. 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.

Obstetrics & Gynecology Nurse Practitioner is a narrow specialty nationwide, with 2,864 enrolled providers across 52 states and an average of 232 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

101 MAIN ST
MEDFORD, MA 02155

Provider Details

NPI 1316935455
Specialty Obstetrics & Gynecology Nurse Practitioner
Credentials NP
Gender Female
NPI Issued 10/12/2005

Hospital and facility affiliations

Facilities where MARY DARCY, NP 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.

HALLMARK HEALTH MEDICAL ASSOCIATES INC
MALDEN, 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).

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 MARY DARCY, NP. Source: openpaymentsdata.cms.gov.

Total received

$56

Largest payer

Hologic Sales and Service, LLC

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.

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 MARY DARCY, NP. To verify MARY DARCY, NP'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.

Brand vs generic prescribing mix · Typical

MARY DARCY, NP — brand share 15.0%
Specialty average (est.)

15% brand-name claims vs 85% generic, on 223 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

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

223
Total Claims
$17K
Total Drug Cost
80
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
362
Total Day Supply
8,363
Brand vs Generic
15% brand / 85% generic
Brand Drug Cost
$2K
Generic Drug Cost
$14K
Antibiotic Claims
24

Patient Demographics

Average Patient Age
67.9 years
Avg HCC Risk Score
0.93
Gender Split
100% female / 0% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What MARY DARCY, NP prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Estradiol
39
Metronidazole
26
Nystatin
26
Yuvafem
Estradiol
19
Betamethasone Valerate
15
Fluconazole
15
Acyclovir
12
Triamcinolone Acetonide
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Obstetrics & Gynecology Nurse Practitioner Overview

How MARY DARCY, NP fits within the Obstetrics & Gynecology Nurse Practitioner landscape nationally.

2,864
Obstetrics & Gynecology Nurse Practitioner Providers in US
52
States with Obstetrics & Gynecology Nurse Practitioner
232
Avg Claims per Provider

MARY DARCY, NP's 223 claims are below the specialty average of 232.

Nearby Obstetrics & Gynecology Nurse Practitioner Providers in Massachusetts

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

Compare Obstetrics & Gynecology Nurse Practitioner nationally: see state-by-state distribution →

Frequently Asked Questions

What is MARY DARCY, NP's specialty?
MARY DARCY, NP specializes in Obstetrics & Gynecology Nurse Practitioner and practices in MEDFORD, Massachusetts. Credentials: NP.
How much does MARY DARCY, NP prescribe under Medicare Part D?
In 2023, MARY DARCY, NP wrote 223 Medicare Part D claims totaling $17K in drug costs for 80 beneficiaries.
Where is MARY DARCY, NP located?
MARY DARCY, NP is located at 101 MAIN ST, MEDFORD, MA, 02155. Phone: (781) 395-6000.
What is MARY DARCY, NP's NPI number?
MARY DARCY, NP's National Provider Identifier (NPI) is 1316935455, issued on 10/12/2005.
Does MARY DARCY, NP prescribe more brand-name or generic drugs?
MARY DARCY, NP's prescribing is 15% brand-name and 85% generic drugs by claim count, with $2K in brand drug costs.
How many Obstetrics & Gynecology Nurse Practitioner providers are there in the US?
There are 2,864 Obstetrics & Gynecology Nurse Practitioner providers across 52 states in the US. The average Obstetrics & Gynecology Nurse Practitioner provider writes 232 Medicare Part D claims per year.
What drugs does MARY DARCY, NP prescribe most often?
Based on 2023 Medicare Part D data, MARY DARCY, NP's most frequently prescribed drugs include Estradiol, Metronidazole, Nystatin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARY DARCY, NP accept Medicare?
MARY DARCY, NP appears in CMS Medicare data with 223 Part D claims and 80 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARY DARCY, NP's credentials?
MARY DARCY, NP's NPI is 1316935455 with credentials NP. 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