NPI registry status
Active
2026 NPPES data Pharmacotherapy Pharmacist NPI 1407917750 PHARM.D.
Verify on CMS → Melissa Cheung, PHARM.D.
Pharmacotherapy Pharmacist in Walnut Creek, 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 5,941 in Pharmacotherapy Pharmacist, 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
770
Medicare Part D claims · 161 beneficiaries · Pharmacotherapy Pharmacist avg: 397
Generic prescribing
49%
generic claims · 38% brand-name · higher generic rates reduce patient out-of-pocket costs
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
Melissa Cheung, PHARM.D. filed 770 Medicare Part D claims in 2023 as a Pharmacotherapy Pharmacist in Walnut Creek, California, prescribing 49% generic.
- 770
- Part D claims, 2023
- 49%
- 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.
Melissa Cheung, PHARM.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
770 Top 29% higher than 71% 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 Melissa Cheung, PHARM.D.?
Quality data not reportedPrimary specialty
Pharmacotherapy Pharmacist
Medicare Part D claims
770 94% vs specialty avg
Specialty distribution in California
How Pharmacotherapy Pharmacist 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 Pharmacotherapy Pharmacist. 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).
Melissa Cheung, PHARM.D. appears in the CMS NPPES registry as a Pharmacotherapy Pharmacist provider holding PHARM.D. credentials at 320 LENNON LN, Walnut Creek, CA, 94598, with a listed phone of (925) 906-2422. NPI 1407917750 was issued on 12/12/2006.
Medicare Part D records for calendar year 2023 show 770 prescription claims written by this provider, covering 161 Medicare beneficiaries and totaling roughly $236K in drug spend, split 38% brand-name and 49% generic by claim count.
Pharmacotherapy Pharmacist is a mid-sized specialty nationwide, with 5,941 enrolled providers across 53 states and an average of 397 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 | 1407917750 |
|---|---|
| Specialty | Pharmacotherapy Pharmacist |
| Credentials | PHARM.D. |
| Gender | Female |
| NPI Issued | 12/12/2006 |
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 Melissa Cheung, PHARM.D.. To verify Melissa Cheung, PHARM.D.'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
Melissa Cheung, PHARM.D. - brand share 38.0%
Pharmacotherapy Pharmacist average
38% brand-name claims vs 49% generic, on 770 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.
770
Total Claims
$236K
Total Drug Cost
161
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,358
- Total Day Supply
- 70,746
- Brand vs Generic
- 38% brand / 49% generic
- Brand Drug Cost
- $228K
- Generic Drug Cost
- $6K
Patient Demographics
- Average Patient Age
- 69.8 years
- Avg HCC Risk Score
- 1.02
- Gender Split
- 45% female / 55% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Melissa Cheung, PHARM.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Jardiance
Jardiance
99 claims
- Metformin Hcl Er
Metformin Hcl Er
98 claims
- Glipizide
Glipizide
76 claims
- Glipizide Er
Glipizide Er
55 claims
- Atorvastatin Calcium
Atorvastatin Calcium
47 claims
- Humulin N
Humulin N
47 claims
- Metformin Hcl
Metformin Hcl
40 claims
- Humulin 70-30 29
Humulin 70-30
29 claims
| Drug | Claims |
|---|---|
| Jardiance Empagliflozin | 99 |
| Metformin Hcl Er Metformin Hcl | 98 |
| Glipizide | 76 |
| Glipizide Er Glipizide | 55 |
| Atorvastatin Calcium | 47 |
| Humulin N Insulin Nph Human Isophane | 47 |
| Metformin Hcl | 40 |
| Humulin 70-30 Insulin Nph Hum/Reg Insulin Hm | 29 |
| Simvastatin | 20 |
| Ozempic Semaglutide | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pharmacotherapy Pharmacist Overview
How Melissa Cheung, PHARM.D. fits within the Pharmacotherapy Pharmacist landscape nationally.
5,941
Pharmacotherapy Pharmacist Providers in US
53
States with Pharmacotherapy Pharmacist
397
Avg Claims per Provider
Melissa Cheung, PHARM.D.'s 770 claims are above the specialty average of 397.
Nearby Pharmacotherapy Pharmacist Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Cheung.
Dr. Danny Abifadel
PHARM.D.
Chico, CA
Dr. Nidhu Abraham
PHARM.D., BCPS
Palo Alto, CA
Dr. Lisa Adams
PHARMD
Fresno, CA
Dr. Edwin Adlam
PHARMD, CGP
Santa Barbara, CA
Dr. Barbara Albrecht
PHARM. D.
Los Angeles, CA
Compare Pharmacotherapy Pharmacist 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 Pharmacotherapy Pharmacist 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 Melissa Cheung, PHARM.D.'s specialty? ▼
Melissa Cheung, PHARM.D. specializes in Pharmacotherapy Pharmacist and practices in Walnut Creek, California. Credentials: PHARM.D..
How much does Melissa Cheung, PHARM.D. prescribe under Medicare Part D? ▼
In 2023, Melissa Cheung, PHARM.D. wrote 770 Medicare Part D claims totaling $236K in drug costs for 161 beneficiaries.
Where is Melissa Cheung, PHARM.D. located? ▼
Melissa Cheung, PHARM.D. is located at 320 LENNON LN, Walnut Creek, CA, 94598. Phone: (925) 906-2422.
What is Melissa Cheung, PHARM.D.'s NPI number? ▼
Melissa Cheung, PHARM.D.'s National Provider Identifier (NPI) is 1407917750, issued on 12/12/2006.
Does Melissa Cheung, PHARM.D. prescribe more brand-name or generic drugs? ▼
Melissa Cheung, PHARM.D.'s prescribing is 38% brand-name and 49% generic drugs by claim count, with $228K in brand drug costs.
How many Pharmacotherapy Pharmacist providers are there in the US? ▼
There are 5,941 Pharmacotherapy Pharmacist providers across 53 states in the US. The average Pharmacotherapy Pharmacist provider writes 397 Medicare Part D claims per year.
What drugs does Melissa Cheung, PHARM.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Melissa Cheung, PHARM.D.'s most frequently prescribed drugs include Jardiance, Metformin Hcl Er, Glipizide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Melissa Cheung, PHARM.D. accept Medicare? ▼
Melissa Cheung, PHARM.D. appears in CMS Medicare data with 770 Part D claims and 161 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Melissa Cheung, PHARM.D.'s credentials? ▼
Melissa Cheung, PHARM.D.'s NPI is 1407917750 with credentials PHARM.D.. 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.