NPI registry status
Active
2026 NPPES data Addiction Medicine (Family Medicine) Physician NPI 1366587198 M.D.
Verify on CMS → Maria Encarnacion, M.D.
Addiction Medicine (Family Medicine) Physician in Willis, Virginia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 763 in Addiction Medicine (Family Medicine) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
760
Medicare Part D claims · 82 beneficiaries · Addiction Medicine (Family Medicine) Physician avg: 1K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Maria Encarnacion, M.D. filed 760 Medicare Part D claims in 2023 as a Addiction Medicine (Family Medicine) Physician in Willis, Virginia.
- 760
- 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.
Maria Encarnacion, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
760 Top 29% higher than 71% of 1,370,886 prescribers
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-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).
What does the federal data show about Maria Encarnacion, M.D.?
Quality data not reportedPrimary specialty
Addiction Medicine (Family Medicine) Physician
Medicare Part D claims
760 33% vs specialty avg
Specialty distribution in Virginia
How Addiction Medicine (Family Medicine) Physician compares to other specialties among Virginia providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Addiction Medicine (Family Medicine) Physician. Verify directly:
How MIPS and board certification work
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. 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.
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.
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
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.
What Maria Encarnacion, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Trazodone Hcl
Trazodone Hcl
37 claims
- Mirtazapine
Mirtazapine
36 claims
- Meloxicam
Meloxicam
30 claims
- Sertraline Hcl
Sertraline Hcl
30 claims
- Amitriptyline Hcl
Amitriptyline Hcl
29 claims
- Buspirone Hcl
Buspirone Hcl
29 claims
- Olanzapine
Olanzapine
26 claims
- Quetiapine Fumarate
Quetiapine Fumarate
20 claims
| 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.
More Addiction Medicine (Family Medicine) Physician in VA →
All providers in Virginia →
Compare specialties →
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.
Dr. Kimberly Albero
DNP FNP-BC
Charlottesville, VA
Dr. William Alford
MD
Virginia Beach, VA
Dr. Chastity Campbell
MSN, APRN, FNP-C
Richmond, VA
Dr. Ashutosh Diwan
MD
Warrenton, VA
Dr. Su Fairchild
MD
Winchester, VA
Compare Addiction Medicine (Family Medicine) Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Virginia medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Addiction Medicine (Family Medicine) Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Virginia
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
View source datasets and methodology notes
- 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
Compiled from official public sources by the PlainDoctor editorial team.