NPI registry status
Active
2026 NPPES data Cardiovascular Disease Physician NPI 1962418889 M.D.
Verify on CMS → Thomas Diggs, M.D.
Cardiovascular Disease Physician in San Diego, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 24,810 in Cardiovascular Disease 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
2K
Medicare Part D claims · 380 beneficiaries · Cardiovascular Disease Physician avg: 3K
Generic prescribing
74%
generic claims · 26% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$427.3
22 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Thomas Diggs, M.D. filed 2,407 Medicare Part D claims in 2023 as a Cardiovascular Disease Physician in San Diego, California, prescribing 74% generic.
- 2K
- Part D claims, 2023
- 74%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥86th
- 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 1962418889 · Cardiovascular Disease Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1962418889
- ENUM-LEGACY 2006
- TAX-MID 25K Cardiovascular Disease
- RX-MID 2,407
- BOOK-LIGHT 2,256 in California
- PHOTO-ENUM Kevin Wei · 2006
Thomas Diggs, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,407 ≥ 86th percentile 86% 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 certification likely (heuristic, not verified)
Thomas Diggs, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 3 hospital affiliations - 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 Thomas Diggs, M.D.?
Quality data not reportedPrimary specialty
Cardiovascular Disease Physician
Medicare Part D claims
2,407 21% vs specialty avg
Specialty distribution in California
How Cardiovascular Disease Physician compares to other specialties among California 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 Cardiovascular Disease 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 | 1962418889 |
|---|---|
| Specialty | Cardiovascular Disease Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/31/2006 |
Hospital and facility affiliations
Facilities where Thomas Diggs, 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.
According to CMS billing records, Thomas Diggs, M.D. is affiliated with 3 Medicare-billing facilities.
Emergency And Acute Care Medical Corporation
Coronado, CA
ON Call Specialists Medical Group OF San Diego Inc
San Diego, CA
Scripps Mercy Physicians Cardiology Medical Corporation
San Diego, CA
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 Thomas Diggs, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$427
Largest payer
Novartis Pharmaceuticals Corporation
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 - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Thomas Diggs, M.D.. To verify Thomas Diggs, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Thomas Diggs, M.D. - brand share 26.0%
Cardiovascular Disease Physician average
26% brand-name claims vs 74% generic, on 2,407 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.
2,407
Total Claims
$673K
Total Drug Cost
380
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,811
- Total Day Supply
- 173,880
- Brand vs Generic
- 26% brand / 74% generic
- Brand Drug Cost
- $626K
- Generic Drug Cost
- $47K
Patient Demographics
- Average Patient Age
- 79.0 years
- Avg HCC Risk Score
- 1.52
- Gender Split
- 45% female / 55% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Thomas Diggs, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Eliquis
Eliquis
347 claims
- Metoprolol Succinate
Metoprolol Succinate
223 claims
- Losartan Potassium
Losartan Potassium
160 claims
- Furosemide
Furosemide
142 claims
- Isosorbide Mononit… 117
Isosorbide Mononitrate Er
117 claims
- Amlodipine Besylate 109
Amlodipine Besylate
109 claims
- Atorvastatin Calcium 105
Atorvastatin Calcium
105 claims
- Metoprolol Tartrate 99
Metoprolol Tartrate
99 claims
| Drug | Claims |
|---|---|
| Eliquis Apixaban | 347 |
| Metoprolol Succinate | 223 |
| Losartan Potassium | 160 |
| Furosemide | 142 |
| Isosorbide Mononitrate Er Isosorbide Mononitrate | 117 |
| Amlodipine Besylate | 109 |
| Atorvastatin Calcium | 105 |
| Metoprolol Tartrate | 99 |
| Carvedilol | 86 |
| Lisinopril | 72 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Cardiovascular Disease Physician Overview
How Thomas Diggs, M.D. fits within the Cardiovascular Disease Physician landscape nationally.
24,810
Cardiovascular Disease Physician Providers in US
54
States with Cardiovascular Disease Physician
3,033
Avg Claims per Provider
Thomas Diggs, M.D.'s 2,407 claims are below the specialty average of 3,033.
Nationwide Cardiovascular Disease Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Diggs, both outside California 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 Cardiovascular Disease Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Diggs.
One of 2,256 Cardiovascular Disease Physician providers enrolled in California, 5 are shown here.
Dr. Abdul Abbasi
MD
Long Beach, CA
Dr. Lillian Abdelmalek
MD
Sacramento, CA
Dr. Robin Abdelmalik
M.D. FACC
Temecula, CA
Dr. Roberto Abdelnur
MD
El Centro, CA
Dr. Sohail Abdi-Moradi
M.D.
Moorpark, CA
Compare Cardiovascular Disease Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Thomas Diggs, M.D.'s specialty? ▼
Thomas Diggs, M.D. specializes in Cardiovascular Disease Physician and practices in San Diego, California. Credentials: M.D..
How much does Thomas Diggs, M.D. prescribe under Medicare Part D? ▼
In 2023, Thomas Diggs, M.D. wrote 2,407 Medicare Part D claims totaling $673K in drug costs for 380 beneficiaries.
Where is Thomas Diggs, M.D. located? ▼
Thomas Diggs, M.D. is located at 501 WASHINGTON ST, San Diego, CA, 92103. Phone: (619) 297-0014.
What is Thomas Diggs, M.D.'s NPI number? ▼
Thomas Diggs, M.D.'s National Provider Identifier (NPI) is 1962418889, issued on 07/31/2006.
Does Thomas Diggs, M.D. prescribe more brand-name or generic drugs? ▼
Thomas Diggs, M.D.'s prescribing is 26% brand-name and 74% generic drugs by claim count, with $626K in brand drug costs.
How many Cardiovascular Disease Physician providers are there in the US? ▼
There are 24,810 Cardiovascular Disease Physician providers across 54 states in the US. The average Cardiovascular Disease Physician provider writes 3,033 Medicare Part D claims per year.
What drugs does Thomas Diggs, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Thomas Diggs, M.D.'s most frequently prescribed drugs include Eliquis, Metoprolol Succinate, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Thomas Diggs, M.D. accept Medicare? ▼
Thomas Diggs, M.D. appears in CMS Medicare data with 2,407 Part D claims and 380 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Thomas Diggs, M.D.'s credentials? ▼
Thomas Diggs, M.D.'s NPI is 1962418889 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.