2026 NPPES data Women's Health Nurse Practitioner NPI 1548636509 NP-C
Verify on CMS →

MARYALICE WALKER, NP-C

Women's Health Nurse Practitioner in BREWER, 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
430
Medicare Part D claims · 53 beneficiaries · Women's Health Nurse Practitioner avg: 262

What the federal data shows

MARYALICE WALKER, NP-C filed 430 Medicare Part D claims in 2023 as a Women's Health Nurse Practitioner in BREWER, Maine.

430
Part D claims, 2023

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.

MARYALICE WALKER, NP-C's Medicare Part D volume vs every U.S. prescriber

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

430 Top 38% higher than 62% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 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 MARYALICE WALKER, NP-C?

Quality data not reported

NPI registry status

Active

Issued 08/13/2015

NPI 1548636509

Primary specialty

Women's Health Nurse Practitioner

Mid-sized

9,452 US NPIs in this specialty

Medicare Part D claims

430 64% vs specialty avg

2023 prescription claims

Specialty avg: 262

Specialty distribution in Maine

How Women's Health Nurse Practitioner compares to other specialties among Maine providers

Maine providers

Women's Health Nurse Practitioner share within Maine

1. Women's Health Nurse Practitioner42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Women's Health Nurse Practitioner share within Maine

Specialty board-certification context

Estimated specialty board-certified rate — Women's Health Nurse Practitioner (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Women's Health Nurse Practitioner ABMS/AOA estimate

Est. board-certified rate (Women's Health Nurse Practitioner) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Women's Health 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).

MARYALICE WALKER, NP-C appears in the CMS NPPES registry as a Women's Health Nurse Practitioner provider holding NP-C credentials at 735 WILSON ST, BREWER, ME, 04412, with a listed phone of (207) 989-1567. NPI 1548636509 was issued on 08/13/2015. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WALKER 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 430 prescription claims written by this provider, covering 53 Medicare beneficiaries and totaling roughly $57K 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.

Women's Health Nurse Practitioner is a mid-sized specialty nationwide, with 9,452 enrolled providers across 55 states and an average of 262 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

735 WILSON ST
BREWER, ME 04412

Provider Details

NPI 1548636509
Specialty Women's Health Nurse Practitioner
Credentials NP-C
Gender Female
NPI Issued 08/13/2015

Medicare Part D Prescribing Data

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

430
Total Claims
$57K
Total Drug Cost
53
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
922
Total Day Supply
25,879
Generic Drug Cost
$20K
Antibiotic Claims
16

Patient Demographics

Average Patient Age
51.2 years
Avg HCC Risk Score
0.81
Gender Split
75% female / 25% male
Age Distribution
<65: 34, 65-74: 14, 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 MARYALICE WALKER, NP-C 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
Spironolactone
33
Estradiol
28
Gabapentin
16
Testosterone Cypionate
16
Finasteride
15
Levothyroxine Sodium
15
Albuterol Sulfate Hfa
Albuterol Sulfate
14
Estradiol Valerate
13
Fluconazole
11
Progesterone
"Progesterone
N/A

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

Women's Health Nurse Practitioner Overview

How MARYALICE WALKER, NP-C fits within the Women's Health Nurse Practitioner landscape nationally.

9,452
Women's Health Nurse Practitioner Providers in US
55
States with Women's Health Nurse Practitioner
262
Avg Claims per Provider

MARYALICE WALKER, NP-C's 430 claims are above the specialty average of 262.

Nearby Women's Health Nurse Practitioner Providers in Maine

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

Compare Women's Health Nurse Practitioner nationally: see state-by-state distribution →

Frequently Asked Questions

What is MARYALICE WALKER, NP-C's specialty?
MARYALICE WALKER, NP-C specializes in Women's Health Nurse Practitioner and practices in BREWER, Maine. Credentials: NP-C.
How much does MARYALICE WALKER, NP-C prescribe under Medicare Part D?
In 2023, MARYALICE WALKER, NP-C wrote 430 Medicare Part D claims totaling $57K in drug costs for 53 beneficiaries.
Where is MARYALICE WALKER, NP-C located?
MARYALICE WALKER, NP-C is located at 735 WILSON ST, BREWER, ME, 04412. Phone: (207) 989-1567.
What is MARYALICE WALKER, NP-C's NPI number?
MARYALICE WALKER, NP-C's National Provider Identifier (NPI) is 1548636509, issued on 08/13/2015.
How many Women's Health Nurse Practitioner providers are there in the US?
There are 9,452 Women's Health Nurse Practitioner providers across 55 states in the US. The average Women's Health Nurse Practitioner provider writes 262 Medicare Part D claims per year.
What drugs does MARYALICE WALKER, NP-C prescribe most often?
Based on 2023 Medicare Part D data, MARYALICE WALKER, NP-C's most frequently prescribed drugs include Spironolactone, Estradiol, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARYALICE WALKER, NP-C accept Medicare?
MARYALICE WALKER, NP-C appears in CMS Medicare data with 430 Part D claims and 53 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARYALICE WALKER, NP-C's credentials?
MARYALICE WALKER, NP-C's NPI is 1548636509 with credentials NP-C. 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