NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1326235136 M.D.
Verify on CMS → Nahel Al Bouz, M.D.
Internal Medicine Physician in Upland, 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
7K
Medicare Part D claims · 452 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
83%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$229.34
10 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
Nahel Al Bouz, M.D. filed 7,108 Medicare Part D claims in 2023 as a Internal Medicine Physician in Upland, California, prescribing 83% generic.
- 7K
- Part D claims, 2023
- 83%
- generic prescribing
- $229.34
- 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.
Nahel Al Bouz, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
7,108 Top 4% higher than 96% 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)
Nahel Al Bouz, 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 Nahel Al Bouz, M.D.?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
7,108 162% 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).
Nahel Al Bouz, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 811 E 11TH ST STE 203, Upland, CA, 91786, with a listed phone of (909) 581-6420. NPI 1326235136 was issued on 09/26/2007.
Medicare Part D records for calendar year 2023 show 7,108 prescription claims written by this provider, covering 452 Medicare beneficiaries and totaling roughly $1.2 million in drug spend, split 16% brand-name and 83% generic by claim count, with an opioid prescribing rate of 0.7%.
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 | 1326235136 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 09/26/2007 |
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 Nahel Al Bouz, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$229
Largest payer
Lilly USA, LLC
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 Nahel Al Bouz, M.D.. To verify Nahel Al Bouz, 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 · Typical
Nahel Al Bouz, M.D. - brand share 16.0%
Internal Medicine Physician average
16% brand-name claims vs 83% generic, on 7,108 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.
7,108
Total Claims
$1.2M
Total Drug Cost
452
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 16,818
- Total Day Supply
- 490,372
- Brand vs Generic
- 16% brand / 83% generic
- Brand Drug Cost
- $1.0M
- Generic Drug Cost
- $165K
- Opioid Claims
- 49 (0.7% rate)
- Antibiotic Claims
- 209
Patient Demographics
- Average Patient Age
- 74.5 years
- Avg HCC Risk Score
- 1.63
- Gender Split
- 59% female / 41% male
- Age Distribution
- <65: 30, 65-74: 212, 75-84: 153, 85+: 57
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Nahel Al Bouz, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
554 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
507 claims
- Levothyroxine Sodium
Levothyroxine Sodium
309 claims
- Amlodipine Besylate
Amlodipine Besylate
276 claims
- Metformin Hcl
Metformin Hcl
247 claims
- Pantoprazole Sodium
Pantoprazole Sodium
247 claims
- Lisinopril 208
Lisinopril
208 claims
- Losartan Potassium 161
Losartan Potassium
161 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 554 |
| Rosuvastatin Calcium | 507 |
| Levothyroxine Sodium | 309 |
| Amlodipine Besylate | 276 |
| Metformin Hcl | 247 |
| Pantoprazole Sodium | 247 |
| Lisinopril | 208 |
| Losartan Potassium | 161 |
| Metoprolol Succinate | 158 |
| Hydrochlorothiazide | 144 |
* 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 Nahel Al Bouz, M.D. 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
Nahel Al Bouz, M.D.'s 7,108 claims are above 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 Al Bouz.
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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Frequently Asked Questions
What is Nahel Al Bouz, M.D.'s specialty? ▼
Nahel Al Bouz, M.D. specializes in Internal Medicine Physician and practices in Upland, California. Credentials: M.D..
How much does Nahel Al Bouz, M.D. prescribe under Medicare Part D? ▼
In 2023, Nahel Al Bouz, M.D. wrote 7,108 Medicare Part D claims totaling $1.2M in drug costs for 452 beneficiaries.
Where is Nahel Al Bouz, M.D. located? ▼
Nahel Al Bouz, M.D. is located at 811 E 11TH ST STE 203, Upland, CA, 91786. Phone: (909) 581-6420.
What is Nahel Al Bouz, M.D.'s NPI number? ▼
Nahel Al Bouz, M.D.'s National Provider Identifier (NPI) is 1326235136, issued on 09/26/2007.
Does Nahel Al Bouz, M.D. prescribe more brand-name or generic drugs? ▼
Nahel Al Bouz, M.D.'s prescribing is 16% brand-name and 83% generic drugs by claim count, with $1.0M in brand drug costs.
Does Nahel Al Bouz, M.D. prescribe opioids? ▼
Yes, Nahel Al Bouz, M.D. had 49 opioid claims in 2023 with an opioid prescribing rate of 0.7%.
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 Nahel Al Bouz, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Nahel Al Bouz, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Rosuvastatin Calcium, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nahel Al Bouz, M.D. accept Medicare? ▼
Nahel Al Bouz, M.D. appears in CMS Medicare data with 7,108 Part D claims and 452 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nahel Al Bouz, M.D.'s credentials? ▼
Nahel Al Bouz, M.D.'s NPI is 1326235136 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
Compiled from official public sources by the PlainDoctor editorial team.