2026 NPPES data Pharmacist NPI 1346310828 PHARMD
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JOANNE CHOU, PHARMD

Pharmacist in REDWOOD CITY, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
1K
Medicare Part D claims · 265 beneficiaries · Pharmacist avg: 135
Generic prescribing
74%
generic claims · 26% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

JOANNE CHOU, PHARMD filed 1,218 Medicare Part D claims in 2023 as a Pharmacist in REDWOOD CITY, California, prescribing 74% generic.

1K
Part D claims, 2023
74%
generic prescribing

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.

JOANNE CHOU, PHARMD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

1,218 Top 22% higher than 78% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). This entry sits in this band. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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 JOANNE CHOU, PHARMD?

Quality data not reported

NPI registry status

Active

Issued 11/09/2006

NPI 1346310828

Primary specialty

Pharmacist

High-volume

290,447 US NPIs in this specialty

Medicare Part D claims

1,218 802% vs specialty avg

2023 prescription claims

Specialty avg: 135

Specialty distribution in California

How Pharmacist compares to other specialties among California providers

California providers

Pharmacist share within California

1. Pharmacist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Pharmacist share within California

Specialty board-certification context

Estimated specialty board-certified rate — Pharmacist (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Pharmacist ABMS/AOA estimate

Est. board-certified rate (Pharmacist) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Pharmacist) — ABMS / AOA estimate

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).

JOANNE CHOU, PHARMD appears in the CMS NPPES registry as a Pharmacist provider holding PHARMD credentials at 1150 VETERANS BLVD, REDWOOD CITY, CA, 94063, with a listed phone of (650) 299-3748. NPI 1346310828 was issued on 11/09/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHOU most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 1,218 prescription claims written by this provider, covering 265 Medicare beneficiaries and totaling roughly $222K in drug spend, split 26% brand-name and 74% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Pharmacist is a high-volume specialty nationwide, with 290,447 enrolled providers across 56 states and an average of 135 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

1150 VETERANS BLVD
REDWOOD CITY, CA 94063

Provider Details

NPI 1346310828
Specialty Pharmacist
Credentials PHARMD
Gender Female
NPI Issued 11/09/2006

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 JOANNE CHOU, PHARMD. To verify JOANNE CHOU, PHARMD'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

JOANNE CHOU, PHARMD — brand share 26.0%
Specialty average (est.)

26% brand-name claims vs 74% generic, on 1,218 2023 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 2023.

1,218
Total Claims
$222K
Total Drug Cost
265
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,753
Total Day Supply
112,464
Brand vs Generic
26% brand / 74% generic
Brand Drug Cost
$208K
Generic Drug Cost
$10K

Patient Demographics

Average Patient Age
71.0 years
Avg HCC Risk Score
1.07
Gender Split
43% female / 57% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What JOANNE CHOU, PHARMD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Metformin Hcl Er
Metformin Hcl
207
Atorvastatin Calcium
198
Metformin Hcl
97
Jardiance
Empagliflozin
87
Glipizide
83
Glimepiride
45
Ozempic
Semaglutide
45
Simvastatin
39
Humulin N
Insulin Nph Human Isophane
36
Humulin 70-30
Insulin Nph Hum/Reg Insulin Hm
24

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Pharmacist Overview

How JOANNE CHOU, PHARMD fits within the Pharmacist landscape nationally.

290,447
Pharmacist Providers in US
56
States with Pharmacist
135
Avg Claims per Provider

JOANNE CHOU, PHARMD's 1,218 claims are above the specialty average of 135.

Nearby Pharmacist Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as CHOU.

Compare Pharmacist nationally: see state-by-state distribution →

Frequently Asked Questions

What is JOANNE CHOU, PHARMD's specialty?
JOANNE CHOU, PHARMD specializes in Pharmacist and practices in REDWOOD CITY, California. Credentials: PHARMD.
How much does JOANNE CHOU, PHARMD prescribe under Medicare Part D?
In 2023, JOANNE CHOU, PHARMD wrote 1,218 Medicare Part D claims totaling $222K in drug costs for 265 beneficiaries.
Where is JOANNE CHOU, PHARMD located?
JOANNE CHOU, PHARMD is located at 1150 VETERANS BLVD, REDWOOD CITY, CA, 94063. Phone: (650) 299-3748.
What is JOANNE CHOU, PHARMD's NPI number?
JOANNE CHOU, PHARMD's National Provider Identifier (NPI) is 1346310828, issued on 11/09/2006.
Does JOANNE CHOU, PHARMD prescribe more brand-name or generic drugs?
JOANNE CHOU, PHARMD's prescribing is 26% brand-name and 74% generic drugs by claim count, with $208K in brand drug costs.
How many Pharmacist providers are there in the US?
There are 290,447 Pharmacist providers across 56 states in the US. The average Pharmacist provider writes 135 Medicare Part D claims per year.
What drugs does JOANNE CHOU, PHARMD prescribe most often?
Based on 2023 Medicare Part D data, JOANNE CHOU, PHARMD's most frequently prescribed drugs include Metformin Hcl Er, Atorvastatin Calcium, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JOANNE CHOU, PHARMD accept Medicare?
JOANNE CHOU, PHARMD appears in CMS Medicare data with 1,218 Part D claims and 265 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JOANNE CHOU, PHARMD's credentials?
JOANNE CHOU, PHARMD's NPI is 1346310828 with credentials PHARMD. 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

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