NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1346326394 MD
Verify on CMS → David De La Loza, MD
Internal Medicine Physician in Los Angeles, 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 172,858 in Internal 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
944
Medicare Part D claims · 169 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
85%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$589.53
9 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
David De La Loza, MD filed 944 Medicare Part D claims in 2023 as a Internal Medicine Physician in Los Angeles, California, prescribing 85% generic.
- 944
- Part D claims, 2023
- 85%
- generic prescribing
- $589.53
- industry payments (Sunshine Act)
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.
David De La Loza, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
944 Top 25% higher than 75% 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)
David De La Loza, 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 David De La Loza, MD?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
944 65% vs specialty avg
Specialty distribution in California
How Internal Medicine 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 Internal 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).
David De La Loza, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 942 S ATLANTIC BLVD, Los Angeles, CA, 90022, with a listed phone of (323) 263-9700. NPI 1346326394 was issued on 10/31/2006.
Medicare Part D records for calendar year 2023 show 944 prescription claims written by this provider, covering 169 Medicare beneficiaries and totaling roughly $108K in drug spend, split 13% brand-name and 85% generic by claim count, with an opioid prescribing rate of 8.9%.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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 | 1346326394 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/31/2006 |
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 David De La Loza, MD. Source: openpaymentsdata.cms.gov.
Total received
$590
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.
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 David De La Loza, MD. To verify David De La Loza, MD'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 · Typical
David De La Loza, MD - brand share 13.0%
Internal Medicine Physician average
13% brand-name claims vs 85% generic, on 944 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.
944
Total Claims
$108K
Total Drug Cost
169
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,384
- Total Day Supply
- 38,852
- Brand vs Generic
- 13% brand / 85% generic
- Brand Drug Cost
- $89K
- Generic Drug Cost
- $19K
- Opioid Claims
- 84 (8.9% rate)
- Antibiotic Claims
- 44
Patient Demographics
- Average Patient Age
- 71.0 years
- Avg HCC Risk Score
- 1.53
- Gender Split
- 55% female / 45% male
- Age Distribution
- <65: 30, 65-74: 83, 75-84: 39, 85+: 17
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What David De La Loza, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
53 claims
- Metformin Hcl
Metformin Hcl
41 claims
- Alprazolam
Alprazolam
39 claims
- Atorvastatin Calcium
Atorvastatin Calcium
38 claims
- Omeprazole
Omeprazole
38 claims
- Amlodipine Besylate
Amlodipine Besylate
36 claims
- Gabapentin
Gabapentin
29 claims
- Lisinopril
Lisinopril
22 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 53 |
| Metformin Hcl | 41 |
| Alprazolam | 39 |
| Atorvastatin Calcium | 38 |
| Omeprazole | 38 |
| Amlodipine Besylate | 36 |
| Gabapentin | 29 |
| Lisinopril | 22 |
| Farxiga Dapagliflozin Propanediol | 18 |
| Losartan Potassium | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How David De La Loza, MD fits within the Internal Medicine Physician landscape nationally.
172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
David De La Loza, MD's 944 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as De La Loza.
Dr. Jacob Aaron
MD
San Francisco, CA
Dr. Alistair Aaronson
MD
Stanford, CA
Dr. Jose Abad.
MD
Sacramento, CA
Dr. Donna Abare
MD
Oakland, CA
Marce Abare
Scotts Valley, CA
Compare Internal 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 California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Internal 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.
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Medical Specialties Explained
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Understanding Medicare Claims Data
What prescribing data reveals about a provider
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How insurance networks affect your costs
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Frequently Asked Questions
What is David De La Loza, MD's specialty? ▼
David De La Loza, MD specializes in Internal Medicine Physician and practices in Los Angeles, California. Credentials: MD.
How much does David De La Loza, MD prescribe under Medicare Part D? ▼
In 2023, David De La Loza, MD wrote 944 Medicare Part D claims totaling $108K in drug costs for 169 beneficiaries.
Where is David De La Loza, MD located? ▼
David De La Loza, MD is located at 942 S ATLANTIC BLVD, Los Angeles, CA, 90022. Phone: (323) 263-9700.
What is David De La Loza, MD's NPI number? ▼
David De La Loza, MD's National Provider Identifier (NPI) is 1346326394, issued on 10/31/2006.
Does David De La Loza, MD prescribe more brand-name or generic drugs? ▼
David De La Loza, MD's prescribing is 13% brand-name and 85% generic drugs by claim count, with $89K in brand drug costs.
Does David De La Loza, MD prescribe opioids? ▼
Yes, David De La Loza, MD had 84 opioid claims in 2023 with an opioid prescribing rate of 8.9%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does David De La Loza, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, David De La Loza, MD's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Metformin Hcl, Alprazolam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does David De La Loza, MD accept Medicare? ▼
David De La Loza, MD appears in CMS Medicare data with 944 Part D claims and 169 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify David De La Loza, MD's credentials? ▼
David De La Loza, MD's NPI is 1346326394 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 (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.