NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1427089028 M.D.
Verify on CMS → Alger Southall, M.D.
Family Medicine Physician in Louisa, 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 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
14K
Medicare Part D claims · 878 beneficiaries · Family Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
23/100
▼ 61 pts below national avg 83.5 · Below average
Industry payments
$2.5K
127 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Alger Southall, M.D. reported a CMS MIPS final score of 23/100 - below the 83.5 national average - and filed 13,618 Medicare Part D claims in 2023.
- 23/100
- MIPS score · -61 vs avg
- 14K
- Part D claims, 2023
- 90%
- generic prescribing
- Likely
- board-certified (heuristic)
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 1427089028 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · MIPS-LOW · RX-HEAVY · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1427089028
- ENUM-LEGACY 2006
- TAX-MEGA 148K Family Medicine
- MIPS-LOW 23/100
- RX-HEAVY 14K claims
- BOOK-LIGHT 3,957 in Virginia
- PHOTO-FINISH Gloria Gamboa · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Steven Unkel · l…
Steven Unkel
22.9 MIPS pts
- Southall · this …
Southall · this provider
23 MIPS pts
- Gloria Gamboa · …
Gloria Gamboa
23 MIPS pts
- Allen Ongsiako ·…
Allen Ongsiako
23 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Alger Southall, M.D.'s MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
23 ≥ 3rd percentile 3% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Alger Southall, M.D. sits
This provider among family medicine physician peers
Across the 21,266 family medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Alger Southall, M.D. writes more Part D claims than 95% of them and scores higher on MIPS quality than 3% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one family medicine physician peer from a representative sample of 60; the gold marker is Alger Southall, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Alger Southall, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Alger Southall, M.D.?
Below national averagePrimary specialty
Family Medicine Physician
Medicare Part D claims
13,618 298% vs specialty avg
MIPS final score
23/100 60.5 pts vs avg
Specialty distribution in Virginia
How Family Medicine Physician compares to other specialties among Virginia providers
Medicare quality performance, MIPS
Alger Southall, M.D.'s 2023 MIPS final score plotted against the Family Medicine Physician national average
- MIPS Final Score
- 23/100
- vs 83.5 national avg · 2023 performance year
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 | 1427089028 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/05/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
22.9694
Final Score
Measured-score avg: 83.5
0
Quality
76.5647
Cost
Reporting: Individual
Hospital and facility affiliations
Facilities where Alger Southall, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Louisa Family Practice, PLC
Louisa, VA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Alger Southall, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$2.5K
Largest payer
AstraZeneca Pharmaceuticals LP
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.
Brand vs generic prescribing mix · Generic-heavy
Alger Southall, M.D. - brand share 9.0%
Family Medicine Physician average
9% brand-name claims vs 90% generic, on 13,618 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.
13,618
Total Claims
$1.1M
Total Drug Cost
878
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 31,414
- Total Day Supply
- 910,189
- Brand vs Generic
- 9% brand / 90% generic
- Brand Drug Cost
- $903K
- Generic Drug Cost
- $222K
- Opioid Claims
- 438 (3.2% rate)
- Antibiotic Claims
- 666
Patient Demographics
- Average Patient Age
- 74.2 years
- Avg HCC Risk Score
- 1.13
- Gender Split
- 52% female / 48% male
- Age Distribution
- <65: 70, 65-74: 387, 75-84: 316, 85+: 105
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Alger Southall, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amlodipine Besylate
Amlodipine Besylate
646 claims
- Atorvastatin Calcium
Atorvastatin Calcium
550 claims
- Metformin Hcl
Metformin Hcl
436 claims
- Levothyroxine Sodium
Levothyroxine Sodium
412 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
335 claims
- Omeprazole
Omeprazole
330 claims
- Prednisone
Prednisone
308 claims
- Lisinopril
Lisinopril
301 claims
| Drug | Claims |
|---|---|
| Amlodipine Besylate | 646 |
| Atorvastatin Calcium | 550 |
| Metformin Hcl | 436 |
| Levothyroxine Sodium | 412 |
| Rosuvastatin Calcium | 335 |
| Omeprazole | 330 |
| Prednisone | 308 |
| Lisinopril | 301 |
| Hydrochlorothiazide | 289 |
| Simvastatin | 280 |
* 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 Alger Southall, 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
Alger Southall, M.D.'s 13,618 claims are above the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Southall, both outside Virginia so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (23 here).
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 Virginia
Other clinicians with the same primary specialty enrolled in Virginia, drawn from the same CMS NPPES roster as Southall.
One of 3,957 Family Medicine Physician providers enrolled in Virginia, 5 are shown here.
Dr. Maureen Aaron
M.D.
Martinsville, VA
Dr. Marianne Abadam
DO
Hampton, VA
Dr. Linda Abbey
M.D.
Richmond, VA
Dr. David Abbot
MD
Vienna, VA
Dr. James Abbott
M.D.
Richmond, VA
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Alger Southall, M.D.'s specialty? ▼
Alger Southall, M.D. specializes in Family Medicine Physician and practices in Louisa, Virginia. Credentials: M.D..
How much does Alger Southall, M.D. prescribe under Medicare Part D? ▼
In 2023, Alger Southall, M.D. wrote 13,618 Medicare Part D claims totaling $1.1M in drug costs for 878 beneficiaries.
What is Alger Southall, M.D.'s Medicare quality score? ▼
Alger Southall, M.D. has a CMS MIPS Final Score of 23/100 (Quality: 0, Cost: 76.6). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Alger Southall, M.D. located? ▼
Alger Southall, M.D. is located at 101 WOOLFOLK AVE., Louisa, VA, 23093. Phone: (540) 967-2202.
What is Alger Southall, M.D.'s NPI number? ▼
Alger Southall, M.D.'s National Provider Identifier (NPI) is 1427089028, issued on 07/05/2006.
Does Alger Southall, M.D. prescribe more brand-name or generic drugs? ▼
Alger Southall, M.D.'s prescribing is 9% brand-name and 90% generic drugs by claim count, with $903K in brand drug costs.
Does Alger Southall, M.D. prescribe opioids? ▼
Yes, Alger Southall, M.D. had 438 opioid claims in 2023 with an opioid prescribing rate of 3.2%.
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 Alger Southall, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Alger Southall, M.D.'s most frequently prescribed drugs include Amlodipine Besylate, Atorvastatin Calcium, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Alger Southall, M.D. accept Medicare? ▼
Alger Southall, M.D. appears in CMS Medicare data with 13,618 Part D claims and 878 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Alger Southall, M.D.'s credentials? ▼
Alger Southall, M.D.'s NPI is 1427089028 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.