NPI registry status
Active
2026 NPPES data Critical Care Certified Respiratory Therapist NPI 1508330747
Verify on CMS → Marshall Clark
Critical Care Certified Respiratory Therapist in Antioch, 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 197 in Critical Care Certified Respiratory Therapist, 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.
What the federal data shows
Marshall Clark is a Critical Care Certified Respiratory Therapist in Antioch, California, listed in the federal CMS National Provider Identifier registry.
- #341
- Critical Care Certified Respiratory Therapist rank among California specialties
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 Marshall Clark
Bare NPI registry listing — limited federal enrichment beyond basic enumeration. Verify all credentials with official sources.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1508330747), first enumerated 01/21/2019.
Source: CMS NPPES
- Not in federal data
Medicare Part D participation
No 2023 Medicare Part D prescribing volume appears in the CMS public file for this NPI (may reflect specialty, new enrollment, or non-prescribing role).
Source: CMS Part D Prescriber PUF
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Marshall Clark'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.
Compare Clark with other Critical Care Certified Respiratory Therapist providers
Same primary specialty, same federal CMS NPPES roster.
Also enrolled in California
- Jeffer Agoncillo Panorama City, CA
- Dennis Alindogan Panorama City, CA
- Ivan Alvarado, RRT San Diego, CA
- Mark Aragona San Diego, CA
- Shannon Bennes, RRT Oakland, CA
- Nicole Bentley, RCP Salinas, CA
Other specialties in Antioch: Behavior Technician (599) · Addiction (Substance Use Disorder) Counselor (160) · Pharmacist (108) · Marriage & Family Therapist (81)
CMS NPPES provider registry desk
NPI 1508330747 · Critical Care Certified Respiratory Therapist
NPI-10 · ENUM-RECENT · TAX-TRACE · RX-NONE · BOOK-THIN · PHOTO-ENUM
- NPI-10 1508330747
- ENUM-RECENT 2019
- TAX-TRACE 197
- RX-NONE No Part D
- BOOK-THIN 57 in California
- PHOTO-ENUM Jessica Pirlet, RCP · 2019
What does the federal data show about Marshall Clark?
Quality data not reportedPrimary specialty
Critical Care Certified Respiratory Therapist
Specialty distribution in California
How Critical Care Certified Respiratory Therapist 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 Critical Care Certified Respiratory Therapist. 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 | 1508330747 |
|---|---|
| Specialty | Critical Care Certified Respiratory Therapist |
| Gender | Male |
| NPI Issued | 01/21/2019 |
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 Marshall Clark. To verify Marshall Clark'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.
More Critical Care Certified Respiratory Therapist in CA →
All providers in California →
Compare specialties →
Critical Care Certified Respiratory Therapist Overview
How Marshall Clark fits within the Critical Care Certified Respiratory Therapist landscape nationally.
197
Critical Care Certified Respiratory Therapist Providers in US
38
States with Critical Care Certified Respiratory Therapist
Nationwide Critical Care Certified Respiratory Therapist peers with similar MIPS or enrollment year
Two federal-record peer sets for Clark, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2019)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Critical Care Certified Respiratory Therapist Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Clark.
One of 57 Critical Care Certified Respiratory Therapist providers enrolled in California, 11 are shown on this page.
Robert Bitner
RCP, CRTT
Canyon Country, CA
Tyler Brooks
Downey, CA
Lixin Chen
RCP
Los Angeles, CA
Marcus Chun
CRTT
Santa Clara, CA
Khoa Chung
Los Angeles, CA
Compare Critical Care Certified Respiratory Therapist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Marshall Clark's specialty? ▼
Marshall Clark specializes in Critical Care Certified Respiratory Therapist and practices in Antioch, California.
Where is Marshall Clark located? ▼
Marshall Clark is located at 4501 SAND CREEK RD, Antioch, CA, 94531. Phone: (925) 813-6716.
What is Marshall Clark's NPI number? ▼
Marshall Clark's National Provider Identifier (NPI) is 1508330747, issued on 01/21/2019.
How many Critical Care Certified Respiratory Therapist providers are there in the US? ▼
There are 197 Critical Care Certified Respiratory Therapist providers across 38 states in the US.
Does Marshall Clark accept Medicare? ▼
Marshall Clark appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Marshall Clark's credentials? ▼
Marshall Clark's NPI is 1508330747. 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.
- 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.