2026 NPPES data Addiction Medicine (Family Medicine) Physician NPI 1366587198 M.D.
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MARIA ENCARNACION, M.D.

Addiction Medicine (Family Medicine) Physician in WILLIS, Virginia. 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
760
Medicare Part D claims · 82 beneficiaries · Addiction Medicine (Family Medicine) Physician avg: 1K
What the federal data reveals: MARIA ENCARNACION, M.D. is a Addiction Medicine (Family Medicine) Physician ([object Object]) practicing in WILLIS, Virginia with a Medicare Part D prescribing footprint of 760 claims across 82 beneficiaries .

What stands out: MARIA ENCARNACION, M.D. filed 760 Medicare Part D claims in 2023 across WILLIS, Virginia. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

MARIA ENCARNACION, 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).

MARIA ENCARNACION, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 02/20/2007

NPI 1366587198

Primary specialty

Addiction Medicine (Family Medicine) Physician

Niche

763 US NPIs in this specialty

Medicare Part D claims

760 33% vs specialty avg

2023 prescription claims

Specialty avg: 1,134

Specialty distribution in Virginia

How Addiction Medicine (Family Medicine) Physician compares to other specialties among Virginia providers

Virginia providers

Addiction Medicine (Family Medicine) Physician share within Virginia

1. Addiction Medicine (Family Medicine) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Addiction Medicine (Family Medicine) Physician share within Virginia

Specialty board-certification context

Estimated specialty board-certified rate — Addiction Medicine (Family Medicine) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Addiction Medicine (Family Medicine) Physician ABMS/AOA estimate

Est. board-certified rate (Addiction Medicine (Family Medicine) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Addiction Medicine (Family 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).

MARIA ENCARNACION, M.D. is a Addiction Medicine (Family Medicine) Physician provider practicing in WILLIS, Virginia, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1366587198. 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.

MARIA ENCARNACION, M.D. appears in the CMS NPPES registry as a Addiction Medicine (Family Medicine) Physician provider holding M.D. credentials at 586 FERNEY CREEK RD NW, WILLIS, VA, 24380, with a listed phone of (540) 789-7341. NPI 1366587198 was issued on 02/20/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ENCARNACION 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 760 prescription claims written by this provider, covering 82 Medicare beneficiaries and totaling roughly $65K 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.

Addiction Medicine (Family Medicine) Physician is a narrow specialty nationwide, with 763 enrolled providers across 48 states and an average of 1,134 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

586 FERNEY CREEK RD NW
WILLIS, VA 24380

Provider Details

NPI 1366587198
Specialty Addiction Medicine (Family Medicine) Physician
Credentials M.D.
Gender Female
NPI Issued 02/20/2007

Medicare Part D Prescribing Data

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

760
Total Claims
$65K
Total Drug Cost
82
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
770
Total Day Supply
13,696
Generic Drug Cost
$19K
Antibiotic Claims
36

Patient Demographics

Average Patient Age
52.2 years
Avg HCC Risk Score
1.58
Gender Split
51% female / 49% male
Age Distribution
<65: 67, 65-74: N/A, 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.

Drug Claims
Trazodone Hcl
37
Mirtazapine
36
Meloxicam
30
Sertraline Hcl
30
Amitriptyline Hcl
29
Buspirone Hcl
29
Olanzapine
26
Quetiapine Fumarate
20
Tizanidine Hcl
19
Atorvastatin Calcium
18

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

Addiction Medicine (Family Medicine) Physician Overview

How MARIA ENCARNACION, M.D. fits within the Addiction Medicine (Family Medicine) Physician landscape nationally.

763
Addiction Medicine (Family Medicine) Physician Providers in US
48
States with Addiction Medicine (Family Medicine) Physician
1,134
Avg Claims per Provider

MARIA ENCARNACION, M.D.'s 760 claims are below the specialty average of 1,134.

Nearby Addiction Medicine (Family Medicine) Physician Providers in Virginia

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

Compare Addiction Medicine (Family Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is MARIA ENCARNACION, M.D.'s specialty?
MARIA ENCARNACION, M.D. specializes in Addiction Medicine (Family Medicine) Physician and practices in WILLIS, Virginia. Credentials: M.D..
How much does MARIA ENCARNACION, M.D. prescribe under Medicare Part D?
In 2023, MARIA ENCARNACION, M.D. wrote 760 Medicare Part D claims totaling $65K in drug costs for 82 beneficiaries.
Where is MARIA ENCARNACION, M.D. located?
MARIA ENCARNACION, M.D. is located at 586 FERNEY CREEK RD NW, WILLIS, VA, 24380. Phone: (540) 789-7341.
What is MARIA ENCARNACION, M.D.'s NPI number?
MARIA ENCARNACION, M.D.'s National Provider Identifier (NPI) is 1366587198, issued on 02/20/2007.
How many Addiction Medicine (Family Medicine) Physician providers are there in the US?
There are 763 Addiction Medicine (Family Medicine) Physician providers across 48 states in the US. The average Addiction Medicine (Family Medicine) Physician provider writes 1,134 Medicare Part D claims per year.
What drugs does MARIA ENCARNACION, M.D. prescribe most often?
Based on 2023 Medicare Part D data, MARIA ENCARNACION, M.D.'s most frequently prescribed drugs include Trazodone Hcl, Mirtazapine, Meloxicam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARIA ENCARNACION, M.D. accept Medicare?
MARIA ENCARNACION, M.D. appears in CMS Medicare data with 760 Part D claims and 82 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARIA ENCARNACION, M.D.'s credentials?
MARIA ENCARNACION, M.D.'s NPI is 1366587198 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.
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