2026 NPPES data Hospitalist Physician NPI 1578671871 FNP
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MARY LAKE, FNP

Hospitalist Physician in TOPSHAM, Maine. 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
943
Medicare Part D claims · 85 beneficiaries · Hospitalist Physician avg: 888
Generic prescribing
80%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$88.31
5 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: MARY LAKE, FNP is a Hospitalist Physician ([object Object]) practicing in TOPSHAM, Maine with a Medicare Part D prescribing footprint of 943 claims across 85 beneficiaries — 20% brand-name prescribing . Industry payments of $88.31 across 5 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: MARY LAKE, FNP filed 943 Medicare Part D claims in 2023 across TOPSHAM, Maine. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

MARY LAKE, FNP 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).

MARY LAKE, FNP at a glance

Quality data not reported

NPI registry status

Active

Issued 08/27/2006

NPI 1578671871

Primary specialty

Hospitalist Physician

Mid-sized

16,825 US NPIs in this specialty

Medicare Part D claims

943 6% vs specialty avg

2023 prescription claims

Specialty avg: 888

Specialty distribution in Maine

How Hospitalist Physician compares to other specialties among Maine providers

Maine providers

Hospitalist Physician share within Maine

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

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).

MARY LAKE, FNP is a Hospitalist Physician provider practicing in TOPSHAM, Maine, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: FNP. NPI: 1578671871. 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.

MARY LAKE, FNP appears in the CMS NPPES registry as a Hospitalist Physician provider holding FNP credentials at 1 WELLNESS WAY, TOPSHAM, ME, 04086, with a listed phone of (207) 406-7667. NPI 1578671871 was issued on 08/27/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what LAKE 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 943 prescription claims written by this provider, covering 85 Medicare beneficiaries and totaling roughly $256K in drug spend, split 20% brand-name and 80% generic by claim count, with an opioid prescribing rate of 1.7%. 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

1 WELLNESS WAY
TOPSHAM, ME 04086

Provider Details

NPI 1578671871
Specialty Hospitalist Physician
Credentials FNP
Gender Female
NPI Issued 08/27/2006

Hospital and facility affiliations

Facilities where MARY LAKE, FNP 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.

EAST GRAND HEALTH CENTER INC
DANFORTH, ME

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 LAKE, FNP. Source: openpaymentsdata.cms.gov.

Total received

$88

Largest payer

Lundbeck 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.

Brand vs generic prescribing mix · Typical

MARY LAKE, FNP — brand share 20.0%
Specialty average (est.)

20% brand-name claims vs 80% generic, on 943 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.

943
Total Claims
$256K
Total Drug Cost
85
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,272
Total Day Supply
66,074
Brand vs Generic
20% brand / 80% generic
Brand Drug Cost
$232K
Generic Drug Cost
$21K
Opioid Claims
16 (1.7% rate)
Antibiotic Claims
36

Patient Demographics

Average Patient Age
72.8 years
Avg HCC Risk Score
1.18
Gender Split
49% female / 51% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
48
Lisinopril
41
Omeprazole
32
Amlodipine Besylate
29
Furosemide
28
Gabapentin
24
Albuterol Sulfate Hfa
Albuterol Sulfate
23
Metoprolol Succinate
19
Losartan Potassium
18
Carvedilol
17

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

Hospitalist Physician Overview

How MARY LAKE, FNP fits within the Hospitalist Physician landscape nationally.

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

MARY LAKE, FNP's 943 claims are above the specialty average of 888.

Nearby Hospitalist Physician Providers in Maine

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

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

Frequently Asked Questions

What is MARY LAKE, FNP's specialty?
MARY LAKE, FNP specializes in Hospitalist Physician and practices in TOPSHAM, Maine. Credentials: FNP.
How much does MARY LAKE, FNP prescribe under Medicare Part D?
In 2023, MARY LAKE, FNP wrote 943 Medicare Part D claims totaling $256K in drug costs for 85 beneficiaries.
Where is MARY LAKE, FNP located?
MARY LAKE, FNP is located at 1 WELLNESS WAY, TOPSHAM, ME, 04086. Phone: (207) 406-7667.
What is MARY LAKE, FNP's NPI number?
MARY LAKE, FNP's National Provider Identifier (NPI) is 1578671871, issued on 08/27/2006.
Does MARY LAKE, FNP prescribe more brand-name or generic drugs?
MARY LAKE, FNP's prescribing is 20% brand-name and 80% generic drugs by claim count, with $232K in brand drug costs.
Does MARY LAKE, FNP prescribe opioids?
Yes, MARY LAKE, FNP had 16 opioid claims in 2023 with an opioid prescribing rate of 1.7%.
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.
What drugs does MARY LAKE, FNP prescribe most often?
Based on 2023 Medicare Part D data, MARY LAKE, FNP's most frequently prescribed drugs include Atorvastatin Calcium, Lisinopril, Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARY LAKE, FNP accept Medicare?
MARY LAKE, FNP appears in CMS Medicare data with 943 Part D claims and 85 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARY LAKE, FNP's credentials?
MARY LAKE, FNP's NPI is 1578671871 with credentials FNP. 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