NPI registry status
Active
2026 NPPES data Addiction Medicine (Family Medicine) Physician NPI 1003091372 MD
Verify on CMS → William Leach, MD
Addiction Medicine (Family Medicine) Physician in Ocala, Florida.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 799 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
884
Medicare Part D claims · 38 beneficiaries · Addiction Medicine (Family Medicine) Physician avg: 1K
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$267.61
18 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
William Leach, MD filed 884 Medicare Part D claims in 2024 as an Addiction Medicine (Family Medicine) Physician in Ocala, Florida, prescribing 83% generic.
- 884
- Part D claims, 2024
- 83%
- generic prescribing
- $267.61
- industry payments (Sunshine Act)
- ≥72nd
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about William Leach, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1003091372), first enumerated 01/07/2008.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 884 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Reported
Industry payment transparency
$267.61 in reported industry payments (18 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Florida statewide board action statistics are published annually — these figures describe aggregate state activity, not William Leach, MD's individual license status. Verify directly with the state medical board.
Source: FLDOH annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Leach with other Addiction Medicine (Family Medicine) Physician providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in Florida
- Dr. Dolor Akpore, D.O Ocala, FL
- Dr. Alicia Baldwin, DO Oviedo, FL
- Dr. John Bell, M.D. Tallahassee, FL
- Dr. Andre Benson, M.D. Port Richey, FL
- Theresa Biemer, P.A-C Port St Lucie, FL
- Dr. Jennine Brandt, M.D. Gainesville, FL
Other specialties in Ocala: Behavior Technician (626) · Student in an Organized Health Care Education/Training Program (315) · Family Nurse Practitioner (291) · Pharmacist (209)
CMS NPPES provider registry desk
NPI 1003091372 · Addiction Medicine (Family Medicine) Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1003091372
- ENUM-MID 2008
- TAX-NARROW 799
- RX-LIGHT 884
- BOOK-THIN 45 in Florida
- PHOTO-ENUM Emad Mousa, MD · 2008
William Leach, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
884 ≥ 72nd percentile 72% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
◑
Board-eligible specialty (heuristic, not verified)
William Leach, MD 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 William Leach, MD?
Quality data not reportedPrimary specialty
Addiction Medicine (Family Medicine) Physician
Medicare Part D claims
884 26% vs specialty avg
Specialty distribution in Florida
How Addiction Medicine (Family Medicine) Physician compares to other specialties among Florida 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).
Practice Address
Provider Details
| NPI | 1003091372 |
|---|---|
| Specialty | Addiction Medicine (Family Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 01/07/2008 |
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 William Leach, MD. Source: openpaymentsdata.cms.gov.
Total received
$268
Largest payer
Takeda Pharmaceuticals U.S.A., 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.
License & disciplinary context - Florida FLDOH 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~75K Florida medical licensees in 2023 - they are NOT specific to William Leach, MD. To verify William Leach, MD's current license status, search the FLDOH public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
480
Total board actions, Florida 2023
Across 467 cases
6.40
Actions per 1,000 licensees
Florida statewide rate
monetary fine
Most common action type
138 cases
FLDOH publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Florida disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
William Leach, MD - brand share 17.0%
Addiction Medicine (Family Medicine) Physician average
17% brand-name claims vs 83% generic, on 884 2024 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 2024.
884
Total Claims
$161K
Total Drug Cost
38
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,224.9
- Total Day Supply
- 34,988
- Brand vs Generic
- 17% brand / 83% generic
- Brand Drug Cost
- $123K
- Generic Drug Cost
- $38K
- Opioid Claims
- 43 (4.9% rate)
Patient Demographics
- Average Patient Age
- 63.8 years
- Avg HCC Risk Score
- 1.12
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 11, 65-74: 22, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What William Leach, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Buprenorphine-Nalo…
Buprenorphine-Naloxone
111 claims
- Diazepam
Diazepam
51 claims
- Duloxetine Hcl 34
Duloxetine Hcl
34 claims
- Quetiapine Fumarate 34
Quetiapine Fumarate
34 claims
- Clonazepam 32
Clonazepam
32 claims
- Dextroamphetamine-… 30
Dextroamphetamine-Amphet Er
30 claims
- Rosuvastatin Calcium 30
Rosuvastatin Calcium
30 claims
- Buprenorphine Hcl 29
Buprenorphine Hcl
29 claims
| Drug | Claims |
|---|---|
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 111 |
| Diazepam | 51 |
| Duloxetine Hcl | 34 |
| Quetiapine Fumarate | 34 |
| Clonazepam | 32 |
| Dextroamphetamine-Amphet Er Dextroamphetamine/Amphetamine | 30 |
| Rosuvastatin Calcium | 30 |
| Buprenorphine Hcl | 29 |
| Gabapentin | 26 |
| Tramadol Hcl | 23 |
* 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 FL →
All providers in Florida →
Compare specialties →
Addiction Medicine (Family Medicine) Physician Overview
How William Leach, MD fits within the Addiction Medicine (Family Medicine) Physician landscape nationally.
799
Addiction Medicine (Family Medicine) Physician Providers in US
49
States with Addiction Medicine (Family Medicine) Physician
1,187
Avg Claims per Provider
William Leach, MD's 884 claims are below the specialty average of 1,187.
Nationwide Addiction Medicine (Family Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Leach, both outside Florida so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2008)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Addiction Medicine (Family Medicine) Physician Providers in Florida
Other clinicians with the same primary specialty enrolled in Florida, drawn from the same CMS NPPES roster as Leach.
One of 45 Addiction Medicine (Family Medicine) Physician providers enrolled in Florida, 11 are shown on this page.
Dawn Chang
ARNP
Orlando, FL
Jane Cohn
PHYSICIAN ASSISTANT
Jensen Beach, FL
Dr. Gregorie Constant-Peter
MD
Orlando, FL
Dr. Miguel Correa
MD
Leesburg, FL
Dr. Sarah Dooley
MD
Gainesville, FL
Compare Addiction Medicine (Family Medicine) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is William Leach, MD's specialty? ▼
William Leach, MD specializes in Addiction Medicine (Family Medicine) Physician and practices in Ocala, Florida. Credentials: MD.
How much does William Leach, MD prescribe under Medicare Part D? ▼
In 2024, William Leach, MD wrote 884 Medicare Part D claims totaling $161K in drug costs for 38 beneficiaries.
Where is William Leach, MD located? ▼
William Leach, MD is located at 2955 SE 3RD CT, Ocala, FL, 34471. Phone: (352) 509-9900.
What is William Leach, MD's NPI number? ▼
William Leach, MD's National Provider Identifier (NPI) is 1003091372, issued on 01/07/2008.
Does William Leach, MD prescribe more brand-name or generic drugs? ▼
William Leach, MD's prescribing is 17% brand-name and 83% generic drugs by claim count, with $123K in brand drug costs.
Does William Leach, MD prescribe opioids? ▼
Yes, William Leach, MD had 43 opioid claims in 2024 with an opioid prescribing rate of 4.9%.
How many Addiction Medicine (Family Medicine) Physician providers are there in the US? ▼
There are 799 Addiction Medicine (Family Medicine) Physician providers across 49 states in the US. The average Addiction Medicine (Family Medicine) Physician provider writes 1,187 Medicare Part D claims per year.
What drugs does William Leach, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, William Leach, MD's most frequently prescribed drugs include Buprenorphine-Naloxone, Diazepam, Duloxetine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Leach, MD accept Medicare? ▼
William Leach, MD appears in CMS Medicare data with 884 Part D claims and 38 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Leach, MD's credentials? ▼
William Leach, MD's NPI is 1003091372 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
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 (2024). 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 August 2026 (NPPES) / 2024 (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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.