NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1942706809
Verify on CMS → Celina Chau
Family Medicine Physician in Palo Alto, 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 150,125 in Family 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
2K
Medicare Part D claims · 203 beneficiaries · Family Medicine Physician avg: 4K
Generic prescribing
91%
generic claims · 8% 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
Celina Chau filed 1,879 Medicare Part D claims in 2024 as a Family Medicine Physician in Palo Alto, California, prescribing 91% generic.
- 2K
- Part D claims, 2024
- 91%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥83rd
- 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 Celina Chau
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 1942706809), first enumerated 03/31/2018.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,879 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 Celina Chau's individual license status. Verify directly with the state medical board.
Source: Medical Board of California annual report FY 2022-23
- 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 Chau with other Family Medicine Physician providers
Same primary specialty, same federal CMS NPPES roster.
All 87 Family Medicine Physician providers in Palo Alto, CA →
Also enrolled in California
- Dr. Omer Aba-Omer, MD Santa Monica, CA
- Dr. Michelle Ababa, MD Wilmington, CA
- Dr. Anna Tzeitel Abalos, MD Roseville, CA
- Dr. Adan Abarca, MD Anaheim, CA
- Dr. Vanessa Abarca, DO Ventura, CA
- Dr. Lorraine Abate, M.D. Sacramento, CA
Other specialties in Palo Alto: Student in an Organized Health Care Education/Training Program (762) · Pediatrics Physician (672) · Pharmacist (259) · Internal Medicine Physician (248)
CMS NPPES provider registry desk
NPI 1942706809 · Family Medicine Physician
NPI-10 · ENUM-RECENT · TAX-MEGA · RX-MID · BOOK-MID · PHOTO-ENUM
- NPI-10 1942706809
- ENUM-RECENT 2018
- TAX-MEGA 150K Family Medicine
- RX-MID 1,879
- BOOK-MID 16,272 in California
- PHOTO-ENUM Bradley Milam, MD · 2018
Celina Chau's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,879 ≥ 83rd percentile 83% 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)
Celina Chau 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 Celina Chau?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
1,879 47% vs specialty avg
Specialty distribution in California
How Family 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 Family 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 | 1942706809 |
|---|---|
| Specialty | Family Medicine Physician |
| Gender | Female |
| NPI Issued | 03/31/2018 |
Hospital and facility affiliations
Facilities where Celina Chau 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.
Sutter Bay Medical Foundation
Fremont, 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 Medical Board of California, FY 2022-23
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across 148,769 California physician licenses in effect in FY 2022-23 - they are NOT specific to Celina Chau. To verify Celina Chau's current license status, use the state board's own license search (see California license lookup), or the Federation of State Medical Boards (FSMB) verification service.
374
Administrative board actions, California FY 2022-23
2.51
Actions per 1,000 physician licenses in effect
California statewide rate
Probation
Most common action type
148 actions
Source: Medical Board of California Annual Report 2022-2023, page 18 (licenses in effect: page 12). Full breakdown by action type on the California discipline page.
Brand vs generic prescribing mix · Generic-heavy
Celina Chau - brand share 8.0%
Family Medicine Physician average
8% brand-name claims vs 91% generic, on 1,879 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.
1,879
Total Claims
$105K
Total Drug Cost
203
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,479.433
- Total Day Supply
- 131,207
- Brand vs Generic
- 8% brand / 91% generic
- Brand Drug Cost
- $78K
- Generic Drug Cost
- $26K
- Antibiotic Claims
- 47
Patient Demographics
- Average Patient Age
- 77.7 years
- Avg HCC Risk Score
- 0.95
- Gender Split
- 64% female / 36% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Celina Chau prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
153 claims
- Amlodipine Besylate
Amlodipine Besylate
120 claims
- Levothyroxine Sodium
Levothyroxine Sodium
112 claims
- Lisinopril
Lisinopril
110 claims
- Losartan Potassium
Losartan Potassium
75 claims
- Simvastatin 52
Simvastatin
52 claims
- Gabapentin 47
Gabapentin
47 claims
- Metoprolol Succinate 42
Metoprolol Succinate
42 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 153 |
| Amlodipine Besylate | 120 |
| Levothyroxine Sodium | 112 |
| Lisinopril | 110 |
| Losartan Potassium | 75 |
| Simvastatin | 52 |
| Gabapentin | 47 |
| Metoprolol Succinate | 42 |
| Fluticasone Propionate | 37 |
| Metformin Hcl | 36 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Celina Chau fits within the Family Medicine Physician landscape nationally.
150,125
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,519
Avg Claims per Provider
Celina Chau's 1,879 claims are below the specialty average of 3,519.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Chau, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2018)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Chau.
One of 16,272 Family Medicine Physician providers enrolled in California, 11 are shown on this page.
Dr. Robert Abatecola
MD
Castro Valley, CA
Dr. Romeo Abaya
M.D.
Cottonwood, CA
Dr. Effiem Abbah
MD, MPH
San Francisco, CA
Dr. Khuzeman Abbasi
MD
Santa Rosa, CA
Dr. Chad Abbott
MD
Aliso Viejo, CA
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Celina Chau's specialty? ▼
Celina Chau specializes in Family Medicine Physician and practices in Palo Alto, California.
How much does Celina Chau prescribe under Medicare Part D? ▼
In 2024, Celina Chau wrote 1,879 Medicare Part D claims totaling $105K in drug costs for 203 beneficiaries.
Where is Celina Chau located? ▼
Celina Chau is located at 795 EL CAMINO REAL, Palo Alto, CA, 94301. Phone: (650) 853-2984.
What is Celina Chau's NPI number? ▼
Celina Chau's National Provider Identifier (NPI) is 1942706809, issued on 03/31/2018.
Does Celina Chau prescribe more brand-name or generic drugs? ▼
Celina Chau's prescribing is 8% brand-name and 91% generic drugs by claim count, with $78K in brand drug costs.
How many Family Medicine Physician providers are there in the US? ▼
There are 150,125 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,519 Medicare Part D claims per year.
What drugs does Celina Chau prescribe most often? ▼
Based on 2024 Medicare Part D data, Celina Chau's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Celina Chau accept Medicare? ▼
Celina Chau appears in CMS Medicare data with 1,879 Part D claims and 203 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Celina Chau's credentials? ▼
Celina Chau's NPI is 1942706809. 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 September 2026.