NPI registry status
Active
2026 NPPES data Oral and Maxillofacial Surgery (Dentist) NPI 1114231610 DDS
Verify on CMS → Nadia Hassan, DDS
Oral and Maxillofacial Surgery (Dentist) in Diamond Bar, 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 7,632 in Oral and Maxillofacial Surgery (Dentist), 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
456
Medicare Part D claims · 240 beneficiaries · Oral and Maxillofacial Surgery (Dentist) avg: 378
What the federal data shows
Nadia Hassan, DDS filed 456 Medicare Part D claims in 2023 as an Oral and Maxillofacial Surgery (Dentist) in Diamond Bar, California.
- 456
- Part D claims, 2023
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.
Nadia Hassan, DDS's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
456 Top 38% higher than 62% 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
What does the federal data show about Nadia Hassan, DDS?
Quality data not reportedPrimary specialty
Oral and Maxillofacial Surgery (Dentist)
Medicare Part D claims
456 21% vs specialty avg
Specialty distribution in California
How Oral and Maxillofacial Surgery (Dentist) 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 Oral and Maxillofacial Surgery (Dentist). 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).
Nadia Hassan, DDS appears in the CMS NPPES registry as an Oral and Maxillofacial Surgery (Dentist) provider holding DDS credentials at 22205 RIM FIRE LN, Diamond Bar, CA, 91765, with a listed phone of (310) 825-0834. NPI 1114231610 was issued on 07/27/2010.
Medicare Part D records for calendar year 2023 show 456 prescription claims written by this provider, covering 240 Medicare beneficiaries and totaling roughly $2K in drug spend, with an opioid prescribing rate of 4.8%.
Oral and Maxillofacial Surgery (Dentist) is a mid-sized specialty nationwide, with 7,632 enrolled providers across 52 states and an average of 378 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 | 1114231610 |
|---|---|
| Specialty | Oral and Maxillofacial Surgery (Dentist) |
| Credentials | DDS |
| Gender | Female |
| NPI Issued | 07/27/2010 |
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 Nadia Hassan, DDS. To verify Nadia Hassan, DDS'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
456
Total Claims
$2K
Total Drug Cost
240
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 464
- Total Day Supply
- 3,808
- Generic Drug Cost
- $2K
- Opioid Claims
- 22 (4.8% rate)
- Antibiotic Claims
- 270
Patient Demographics
- Average Patient Age
- 75.4 years
- Avg HCC Risk Score
- 1.28
- Gender Split
- 52% female / 48% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Nadia Hassan, DDS prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amoxicillin
Amoxicillin
183 claims
- Ibuprofen
Ibuprofen
112 claims
- Chlorhexidine Gluc… 42
Chlorhexidine Gluconate
42 claims
- Azithromycin 33
Azithromycin
33 claims
- Amoxicillin-Clavul… 31
Amoxicillin-Clavulanate Potass
31 claims
- Clindamycin Hcl 18
Clindamycin Hcl
18 claims
- Acetaminophen-Code… 12
Acetaminophen-Codeine
12 claims
| Drug | Claims |
|---|---|
| Amoxicillin | 183 |
| Ibuprofen | 112 |
| Chlorhexidine Gluconate | 42 |
| Azithromycin | 33 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 31 |
| Clindamycin Hcl | 18 |
| Acetaminophen-Codeine Acetaminophen With Codeine | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Oral and Maxillofacial Surgery (Dentist) in CA →
All providers in California →
Compare specialties →
Oral and Maxillofacial Surgery (Dentist) Overview
How Nadia Hassan, DDS fits within the Oral and Maxillofacial Surgery (Dentist) landscape nationally.
7,632
Oral and Maxillofacial Surgery (Dentist) Providers in US
52
States with Oral and Maxillofacial Surgery (Dentist)
378
Avg Claims per Provider
Nadia Hassan, DDS's 456 claims are above the specialty average of 378.
Nearby Oral and Maxillofacial Surgery (Dentist) Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Hassan.
Dr. Hooman Adamous
DMD
Bellflower, CA
Dr. David Adams
DDS
Fresno, CA
Dr. Arman Afifi
D.D.S., M.D.
Cupertino, CA
Dr. Payam Afzali
DDS, MD
Los Angeles, CA
Dr. Jacob Agatstein
D.M.D.
Torrance, CA
Compare Oral and Maxillofacial Surgery (Dentist) 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 Oral and Maxillofacial Surgery (Dentist) 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 Nadia Hassan, DDS's specialty? ▼
Nadia Hassan, DDS specializes in Oral and Maxillofacial Surgery (Dentist) and practices in Diamond Bar, California. Credentials: DDS.
How much does Nadia Hassan, DDS prescribe under Medicare Part D? ▼
In 2023, Nadia Hassan, DDS wrote 456 Medicare Part D claims totaling $2K in drug costs for 240 beneficiaries.
Where is Nadia Hassan, DDS located? ▼
Nadia Hassan, DDS is located at 22205 RIM FIRE LN, Diamond Bar, CA, 91765. Phone: (310) 825-0834.
What is Nadia Hassan, DDS's NPI number? ▼
Nadia Hassan, DDS's National Provider Identifier (NPI) is 1114231610, issued on 07/27/2010.
Does Nadia Hassan, DDS prescribe opioids? ▼
Yes, Nadia Hassan, DDS had 22 opioid claims in 2023 with an opioid prescribing rate of 4.8%.
How many Oral and Maxillofacial Surgery (Dentist) providers are there in the US? ▼
There are 7,632 Oral and Maxillofacial Surgery (Dentist) providers across 52 states in the US. The average Oral and Maxillofacial Surgery (Dentist) provider writes 378 Medicare Part D claims per year.
What drugs does Nadia Hassan, DDS prescribe most often? ▼
Based on 2023 Medicare Part D data, Nadia Hassan, DDS's most frequently prescribed drugs include Amoxicillin, Ibuprofen, Chlorhexidine Gluconate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nadia Hassan, DDS accept Medicare? ▼
Nadia Hassan, DDS appears in CMS Medicare data with 456 Part D claims and 240 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nadia Hassan, DDS's credentials? ▼
Nadia Hassan, DDS's NPI is 1114231610 with credentials DDS. 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.