NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1871014027 DO
Verify on CMS → Mahmoud Abdallah, DO
Internal Medicine Physician in Garden Grove, 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 174,792 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
366
Medicare Part D claims · 92 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
75%
generic claims · 25% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Mahmoud Abdallah, DO filed 366 Medicare Part D claims in 2024 as an Internal Medicine Physician in Garden Grove, California, prescribing 75% generic.
- 366
- Part D claims, 2024
- 75%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥56th
- 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.
Federal trust snapshot
What official records show about Mahmoud Abdallah, DO
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1871014027), first enumerated 06/28/2017.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 366 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Mahmoud Abdallah, DO's individual license status. Verify directly with the state medical board.
Source: MBC annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1871014027 · Internal Medicine Physician
NPI-10 · ENUM-RECENT · TAX-MEGA · RX-LIGHT · BOOK-MID · PHOTO-ENUM
- NPI-10 1871014027
- ENUM-RECENT 2017
- TAX-MEGA 175K Internal Medicine
- RX-LIGHT 366
- BOOK-MID 20,403 in California
- PHOTO-ENUM Tarreyca Mulinda · 2017
Mahmoud Abdallah, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
366 ≥ 56th percentile 56% of 1,416,883 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 · 2024
✓
Board certification likely (heuristic, not verified)
Mahmoud Abdallah, DO practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Mahmoud Abdallah, DO?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
366 87% 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).
Practice Address
Provider Details
| NPI | 1871014027 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 06/28/2017 |
Hospital and facility affiliations
Facilities where Mahmoud Abdallah, DO 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.
Pathway Medical Group Inc
Garden Grove, 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).
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 Mahmoud Abdallah, DO. To verify Mahmoud Abdallah, DO'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
Mahmoud Abdallah, DO - brand share 25.0%
Internal Medicine Physician average
25% brand-name claims vs 75% generic, on 366 2024 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 2024.
366
Total Claims
$49K
Total Drug Cost
92
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 454.033
- Total Day Supply
- 12,676
- Brand vs Generic
- 25% brand / 75% generic
- Brand Drug Cost
- $43K
- Generic Drug Cost
- $5K
- Antibiotic Claims
- 19
Patient Demographics
- Average Patient Age
- 76.2 years
- Avg HCC Risk Score
- 2.26
- Gender Split
- 54% female / 46% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Mahmoud Abdallah, DO prescribes most
Top Medicare Part D drugs by claim count, 2024
- Trelegy Ellipta
Trelegy Ellipta
29 claims
- Montelukast Sodium
Montelukast Sodium
24 claims
- Pantoprazole Sodium
Pantoprazole Sodium
23 claims
- Spiriva Handihaler
Spiriva Handihaler
16 claims
- Fluticasone Propio…
Fluticasone Propionate
15 claims
- Levothyroxine Sodium
Levothyroxine Sodium
14 claims
- Furosemide
Furosemide
13 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
12 claims
| Drug | Claims |
|---|---|
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 29 |
| Montelukast Sodium | 24 |
| Pantoprazole Sodium | 23 |
| Spiriva Handihaler Tiotropium Bromide | 16 |
| Fluticasone Propionate | 15 |
| Levothyroxine Sodium | 14 |
| Furosemide | 13 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 12 |
* 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 Mahmoud Abdallah, DO fits within the Internal Medicine Physician landscape nationally.
174,792
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,785
Avg Claims per Provider
Mahmoud Abdallah, DO's 366 claims are below the specialty average of 2,785.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Abdallah, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2017)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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 Abdallah.
One of 20,403 Internal Medicine Physician providers enrolled in California, 5 are shown here.
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 →
Frequently Asked Questions
What is Mahmoud Abdallah, DO's specialty? ▼
Mahmoud Abdallah, DO specializes in Internal Medicine Physician and practices in Garden Grove, California. Credentials: DO.
How much does Mahmoud Abdallah, DO prescribe under Medicare Part D? ▼
In 2024, Mahmoud Abdallah, DO wrote 366 Medicare Part D claims totaling $49K in drug costs for 92 beneficiaries.
Where is Mahmoud Abdallah, DO located? ▼
Mahmoud Abdallah, DO is located at 12462 BROOKHURST ST STE A&B, Garden Grove, CA, 92840. Phone: (714) 636-9850.
What is Mahmoud Abdallah, DO's NPI number? ▼
Mahmoud Abdallah, DO's National Provider Identifier (NPI) is 1871014027, issued on 06/28/2017.
Does Mahmoud Abdallah, DO prescribe more brand-name or generic drugs? ▼
Mahmoud Abdallah, DO's prescribing is 25% brand-name and 75% generic drugs by claim count, with $43K in brand drug costs.
How many Internal Medicine Physician providers are there in the US? ▼
There are 174,792 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,785 Medicare Part D claims per year.
What drugs does Mahmoud Abdallah, DO prescribe most often? ▼
Based on 2024 Medicare Part D data, Mahmoud Abdallah, DO's most frequently prescribed drugs include Trelegy Ellipta, Montelukast Sodium, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mahmoud Abdallah, DO accept Medicare? ▼
Mahmoud Abdallah, DO appears in CMS Medicare data with 366 Part D claims and 92 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mahmoud Abdallah, DO's credentials? ▼
Mahmoud Abdallah, DO's NPI is 1871014027 with credentials DO. 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.