2026 NPPES data Obstetrics & Gynecology Physician NPI 1861593824 MD
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KAREN MAYNARD, MD

Obstetrics & Gynecology Physician in NASHUA, New Hampshire. 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
254
Medicare Part D claims · 94 beneficiaries · Obstetrics & Gynecology Physician avg: 179
Generic prescribing
84%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.5K
9 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

KAREN MAYNARD, MD filed 254 Medicare Part D claims in 2023 as a Obstetrics & Gynecology Physician in NASHUA, New Hampshire, prescribing 84% generic.

254
Part D claims, 2023
84%
generic prescribing
Likely
board-certified (heuristic)

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.

KAREN MAYNARD, MD's Medicare Part D volume vs every U.S. prescriber

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

254 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

Board certification likely (heuristic — not verified)

KAREN MAYNARD, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 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 KAREN MAYNARD, MD?

Quality data not reported

NPI registry status

Active

Issued 09/25/2006

NPI 1861593824

Primary specialty

Obstetrics & Gynecology Physician

Mid-sized

44,313 US NPIs in this specialty

Medicare Part D claims

254 42% vs specialty avg

2023 prescription claims

Specialty avg: 179

Specialty distribution in New Hampshire

How Obstetrics & Gynecology Physician compares to other specialties among New Hampshire providers

New Hampshire providers

Obstetrics & Gynecology Physician share within New Hampshire

1. Obstetrics & Gynecology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Obstetrics & Gynecology Physician share within New Hampshire

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Obstetrics & Gynecology 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 MAYNARD, MD appears in the CMS NPPES registry as a Obstetrics & Gynecology Physician provider holding MD credentials at 10 PROSPECT ST, NASHUA, NH, 03060, with a listed phone of (603) 577-3100. NPI 1861593824 was issued on 09/25/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MAYNARD 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 254 prescription claims written by this provider, covering 94 Medicare beneficiaries and totaling roughly $29K in drug spend, split 16% brand-name and 84% 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 Physician is a mid-sized specialty nationwide, with 44,313 enrolled providers across 56 states and an average of 179 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

10 PROSPECT ST
NASHUA, NH 03060

Provider Details

NPI 1861593824
Specialty Obstetrics & Gynecology Physician
Credentials MD
Gender Female
NPI Issued 09/25/2006

Hospital and facility affiliations

Facilities where KAREN MAYNARD, MD 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.

FOUNDATION MEDICAL PARTNERS INC
MILFORD, NH
LAMPREY HEALTH CARE INC
NASHUA, NH

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 KAREN MAYNARD, MD. Source: openpaymentsdata.cms.gov.

Total received

$1.5K

Largest payer

INTUITIVE SURGICAL, 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.

Brand vs generic prescribing mix · Typical

KAREN MAYNARD, MD — brand share 16.0%
Specialty average (est.)

16% brand-name claims vs 84% generic, on 254 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.

254
Total Claims
$29K
Total Drug Cost
94
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
530
Total Day Supply
14,597
Brand vs Generic
16% brand / 84% generic
Brand Drug Cost
$16K
Generic Drug Cost
$13K
Antibiotic Claims
13

Patient Demographics

Average Patient Age
66.0 years
Avg HCC Risk Score
1.08
Gender Split
100% female / 0% male
Age Distribution
<65: 25, 65-74: 44, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What KAREN MAYNARD, MD 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
55
Valacyclovir
Valacyclovir Hcl
14
Triamcinolone Acetonide
13
Clotrimazole-Betamethasone
Clotrimazole/Betamethasone Dip
11
Medroxyprogesterone Acetate
11
Premarin
"Estrogens
N/A

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

Obstetrics & Gynecology Physician Overview

How KAREN MAYNARD, MD fits within the Obstetrics & Gynecology Physician landscape nationally.

44,313
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider

KAREN MAYNARD, MD's 254 claims are above the specialty average of 179.

Nearby Obstetrics & Gynecology Physician Providers in New Hampshire

Other clinicians with the same primary specialty enrolled in New Hampshire, drawn from the same CMS NPPES roster as MAYNARD.

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

Frequently Asked Questions

What is KAREN MAYNARD, MD's specialty?
KAREN MAYNARD, MD specializes in Obstetrics & Gynecology Physician and practices in NASHUA, New Hampshire. Credentials: MD.
How much does KAREN MAYNARD, MD prescribe under Medicare Part D?
In 2023, KAREN MAYNARD, MD wrote 254 Medicare Part D claims totaling $29K in drug costs for 94 beneficiaries.
Where is KAREN MAYNARD, MD located?
KAREN MAYNARD, MD is located at 10 PROSPECT ST, NASHUA, NH, 03060. Phone: (603) 577-3100.
What is KAREN MAYNARD, MD's NPI number?
KAREN MAYNARD, MD's National Provider Identifier (NPI) is 1861593824, issued on 09/25/2006.
Does KAREN MAYNARD, MD prescribe more brand-name or generic drugs?
KAREN MAYNARD, MD's prescribing is 16% brand-name and 84% generic drugs by claim count, with $16K in brand drug costs.
How many Obstetrics & Gynecology Physician providers are there in the US?
There are 44,313 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does KAREN MAYNARD, MD prescribe most often?
Based on 2023 Medicare Part D data, KAREN MAYNARD, MD's most frequently prescribed drugs include Estradiol, Valacyclovir, Triamcinolone Acetonide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does KAREN MAYNARD, MD accept Medicare?
KAREN MAYNARD, MD appears in CMS Medicare data with 254 Part D claims and 94 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify KAREN MAYNARD, MD's credentials?
KAREN MAYNARD, MD's NPI is 1861593824 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