NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1851485122 M.D.
Verify on CMS → David Williams, M.D.
Family Medicine Physician in Aliceville, Alabama.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in 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
395
Medicare Part D claims · 135 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
36%
generic claims · 64% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
David Williams, M.D. filed 395 Medicare Part D claims in 2023 as a Family Medicine Physician in Aliceville, Alabama, prescribing 36% generic.
- 395
- Part D claims, 2023
- 36%
- generic prescribing
- ≥57th
- 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.
CMS NPPES provider registry desk
NPI 1851485122 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1851485122
- ENUM-LEGACY 2006
- TAX-MEGA 148K Family Medicine
- RX-LIGHT 395
- BOOK-LIGHT 1,856 in Alabama
- PHOTO-ENUM Anne Pinfold · 2006
David Williams, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
395 ≥ 57th percentile 57% of 1,370,886 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 · 2023
◑
Board-eligible specialty (heuristic, not verified)
David Williams, 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 David Williams, M.D.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
395 88% vs specialty avg
Specialty distribution in Alabama
How Family Medicine Physician compares to other specialties among Alabama 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 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 | 1851485122 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 10/03/2006 |
Brand vs generic prescribing mix · Brand-heavy
David Williams, M.D. - brand share 64.0%
Family Medicine Physician average
64% brand-name claims vs 36% generic, on 395 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.
395
Total Claims
$278K
Total Drug Cost
135
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 465
- Total Day Supply
- 11,971
- Brand vs Generic
- 64% brand / 36% generic
- Brand Drug Cost
- $277K
- Generic Drug Cost
- $2K
- Antibiotic Claims
- 28
Patient Demographics
- Average Patient Age
- 65.5 years
- Avg HCC Risk Score
- 0.98
- Gender Split
- 70% female / 30% male
- Age Distribution
- <65: 40, 65-74: 75, 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 David Williams, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Mounjaro
Mounjaro
183 claims
- Ozempic 40
Ozempic
40 claims
- Topiramate 27
Topiramate
27 claims
- Rybelsus 24
Rybelsus
24 claims
- Azithromycin 15
Azithromycin
15 claims
| Drug | Claims |
|---|---|
| Mounjaro Tirzepatide | 183 |
| Ozempic Semaglutide | 40 |
| Topiramate | 27 |
| Rybelsus Semaglutide | 24 |
| Azithromycin | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How David Williams, M.D. fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
David Williams, M.D.'s 395 claims are below the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Williams, both outside Alabama so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Alabama
Other clinicians with the same primary specialty enrolled in Alabama, drawn from the same CMS NPPES roster as Williams.
One of 1,856 Family Medicine Physician providers enrolled in Alabama, 5 are shown here.
Dr. Bahaa Abdelqader
DO
Mobile, AL
Dr. Sumayah Abed
MD
Hoover, AL
Dr. Charles Abney
M.D.
Tuscaloosa, AL
Dr. Jennifer Abt
DO
Montgomery, AL
Dr. Dakota Acton Jones
M.D.
Fayette, AL
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is David Williams, M.D.'s specialty? ▼
David Williams, M.D. specializes in Family Medicine Physician and practices in Aliceville, Alabama. Credentials: M.D..
How much does David Williams, M.D. prescribe under Medicare Part D? ▼
In 2023, David Williams, M.D. wrote 395 Medicare Part D claims totaling $278K in drug costs for 135 beneficiaries.
Where is David Williams, M.D. located? ▼
David Williams, M.D. is located at 1400 CARROLLTON RD, Aliceville, AL, 35442. Phone: (205) 373-6323.
What is David Williams, M.D.'s NPI number? ▼
David Williams, M.D.'s National Provider Identifier (NPI) is 1851485122, issued on 10/03/2006.
Does David Williams, M.D. prescribe more brand-name or generic drugs? ▼
David Williams, M.D.'s prescribing is 64% brand-name and 36% generic drugs by claim count, with $277K in brand drug costs.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does David Williams, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, David Williams, M.D.'s most frequently prescribed drugs include Mounjaro, Ozempic, Topiramate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does David Williams, M.D. accept Medicare? ▼
David Williams, M.D. appears in CMS Medicare data with 395 Part D claims and 135 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify David Williams, M.D.'s credentials? ▼
David Williams, M.D.'s NPI is 1851485122 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
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 May 2026.