NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1689248221 PA-C, MPH
Verify on CMS → Carolyn Ngo-Bell, PA-C, MPH
Physician Assistant in San Jose, 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 150,974 in Physician Assistant, 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
12
Medicare Part D claims · 12 beneficiaries · Physician Assistant avg: 790
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
Carolyn Ngo-Bell, PA-C, MPH filed 12 Medicare Part D claims in 2023 as a Physician Assistant in San Jose, California.
- 12
- 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.
Carolyn Ngo-Bell, PA-C, MPH's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
12 0th percentile higher than 0% 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 Carolyn Ngo-Bell, PA-C, MPH?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
12 98% vs specialty avg
Specialty distribution in California
How Physician Assistant 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 Physician Assistant. 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).
Carolyn Ngo-Bell, PA-C, MPH appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C, MPH credentials at 455 OCONNOR DR STE 150, San Jose, CA, 95128, with a listed phone of (669) 299-8800. NPI 1689248221 was issued on 05/18/2021.
Medicare Part D records for calendar year 2023 show 12 prescription claims written by this provider, covering 12 Medicare beneficiaries and totaling roughly $143 in drug spend.
Physician Assistant is a high-volume specialty nationwide, with 150,974 enrolled providers across 56 states and an average of 790 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 | 1689248221 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA-C, MPH |
| Gender | Female |
| NPI Issued | 05/18/2021 |
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 Carolyn Ngo-Bell, PA-C, MPH. To verify Carolyn Ngo-Bell, PA-C, MPH'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.
12
Total Claims
$143
Total Drug Cost
12
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 12
- Total Day Supply
- 89
- Brand Drug Cost
- $0
- Generic Drug Cost
- $143
Patient Demographics
- Average Patient Age
- 65.3 years
- Avg HCC Risk Score
- 1.42
Physician Assistant Overview
How Carolyn Ngo-Bell, PA-C, MPH fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Carolyn Ngo-Bell, PA-C, MPH's 12 claims are below the specialty average of 790.
Nearby Physician Assistant Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Ngo-Bell.
Dr. Marcia -Galbraith
PA
Stockton, CA
Dr. Danny Abad
PA
Orange, CA
Dr. Lea Dominique Abadies
PA
Tustin, CA
Dr. Rea Elizabeth Abaniel
P.A.-C
Seal Beach, CA
Dr. Ramina Abbasi
PA-C
Signal Hill, CA
Compare Physician Assistant 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 Physician Assistant 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.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
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Frequently Asked Questions
What is Carolyn Ngo-Bell, PA-C, MPH's specialty? ▼
Carolyn Ngo-Bell, PA-C, MPH specializes in Physician Assistant and practices in San Jose, California. Credentials: PA-C, MPH.
How much does Carolyn Ngo-Bell, PA-C, MPH prescribe under Medicare Part D? ▼
In 2023, Carolyn Ngo-Bell, PA-C, MPH wrote 12 Medicare Part D claims totaling $143 in drug costs for 12 beneficiaries.
Where is Carolyn Ngo-Bell, PA-C, MPH located? ▼
Carolyn Ngo-Bell, PA-C, MPH is located at 455 OCONNOR DR STE 150, San Jose, CA, 95128. Phone: (669) 299-8800.
What is Carolyn Ngo-Bell, PA-C, MPH's NPI number? ▼
Carolyn Ngo-Bell, PA-C, MPH's National Provider Identifier (NPI) is 1689248221, issued on 05/18/2021.
How many Physician Assistant providers are there in the US? ▼
There are 150,974 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
Does Carolyn Ngo-Bell, PA-C, MPH accept Medicare? ▼
Carolyn Ngo-Bell, PA-C, MPH appears in CMS Medicare data with 12 Part D claims and 12 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Carolyn Ngo-Bell, PA-C, MPH's credentials? ▼
Carolyn Ngo-Bell, PA-C, MPH's NPI is 1689248221 with credentials PA-C, MPH. 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.
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.