NPI registry status
Active
2026 NPPES data Pharmacist NPI 1255424222 PHARM.D.
Verify on CMS → Christy Yee, PHARM.D.
Pharmacist in Vacaville, 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 291,043 in 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
2K
Medicare Part D claims · 308 beneficiaries · Pharmacist avg: 135
Generic prescribing
59%
generic claims · 30% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Christy Yee, PHARM.D. filed 2,082 Medicare Part D claims in 2023 as a Pharmacist in Vacaville, California, prescribing 59% generic.
- 2K
- Part D claims, 2023
- 59%
- generic prescribing
- ≥84th
- 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.
Christy Yee, PHARM.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,082 ≥ 84th percentile 84% of 1,370,886 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 · 2023
What does the federal data show about Christy Yee, PHARM.D.?
Quality data not reportedPrimary specialty
Pharmacist
Medicare Part D claims
2,082 15× vs specialty avg
Specialty distribution in California
How 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 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).
Christy Yee, PHARM.D. appears in the CMS NPPES registry as a Pharmacist provider holding PHARM.D. credentials at 1 QUALITY DR, Vacaville, CA, 95688, with a listed phone of (707) 624-2012. NPI 1255424222 was issued on 10/02/2006.
Medicare Part D records for calendar year 2023 show 2,082 prescription claims written by this provider, covering 308 Medicare beneficiaries and totaling roughly $332K in drug spend, split 30% brand-name and 59% generic by claim count.
Pharmacist is a high-volume specialty nationwide, with 291,043 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
Provider Details
| NPI | 1255424222 |
|---|---|
| Specialty | Pharmacist |
| Credentials | PHARM.D. |
| Gender | Female |
| NPI Issued | 10/02/2006 |
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 Christy Yee, PHARM.D.. To verify Christy Yee, 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
Christy Yee, PHARM.D. - brand share 30.0%
Pharmacist average
30% brand-name claims vs 59% generic, on 2,082 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.
2,082
Total Claims
$332K
Total Drug Cost
308
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,505
- Total Day Supply
- 195,046
- Brand vs Generic
- 30% brand / 59% generic
- Brand Drug Cost
- $310K
- Generic Drug Cost
- $17K
Patient Demographics
- Average Patient Age
- 70.0 years
- Avg HCC Risk Score
- 1.29
- Gender Split
- 47% female / 53% male
- Age Distribution
- <65: 24, 65-74: 229, 75-84: 55, 85+: 0
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Christy Yee, PHARM.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
265 claims
- Metformin Hcl Er
Metformin Hcl Er
224 claims
- Glipizide
Glipizide
192 claims
- Humulin N
Humulin N
186 claims
- Jardiance 101
Jardiance
101 claims
- Metformin Hcl 100
Metformin Hcl
100 claims
- Lisinopril 81
Lisinopril
81 claims
- Victoza 2-Pak 62
Victoza 2-Pak
62 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 265 |
| Metformin Hcl Er Metformin Hcl | 224 |
| Glipizide | 192 |
| Humulin N Insulin Nph Human Isophane | 186 |
| Jardiance Empagliflozin | 101 |
| Metformin Hcl | 100 |
| Lisinopril | 81 |
| Victoza 2-Pak Liraglutide | 62 |
| Losartan Potassium | 53 |
| Amlodipine Besylate | 50 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Pharmacist Overview
How Christy Yee, PHARM.D. fits within the Pharmacist landscape nationally.
291,043
Pharmacist Providers in US
56
States with Pharmacist
135
Avg Claims per Provider
Christy Yee, PHARM.D.'s 2,082 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 Yee.
Dr. Caroline A-Haja
PHARM.D.
San Pedro, CA
Gayatri Aachi
Livermore, CA
Dr. Mahshid Aalam
PHARMD
Los Angeles, CA
Jaleh Aaliiveli
San Ramon, CA
Dr. Cassi Aarvig
RPH
Tracy, CA
Compare 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 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 Christy Yee, PHARM.D.'s specialty? ▼
Christy Yee, PHARM.D. specializes in Pharmacist and practices in Vacaville, California. Credentials: PHARM.D..
How much does Christy Yee, PHARM.D. prescribe under Medicare Part D? ▼
In 2023, Christy Yee, PHARM.D. wrote 2,082 Medicare Part D claims totaling $332K in drug costs for 308 beneficiaries.
Where is Christy Yee, PHARM.D. located? ▼
Christy Yee, PHARM.D. is located at 1 QUALITY DR, Vacaville, CA, 95688. Phone: (707) 624-2012.
What is Christy Yee, PHARM.D.'s NPI number? ▼
Christy Yee, PHARM.D.'s National Provider Identifier (NPI) is 1255424222, issued on 10/02/2006.
Does Christy Yee, PHARM.D. prescribe more brand-name or generic drugs? ▼
Christy Yee, PHARM.D.'s prescribing is 30% brand-name and 59% generic drugs by claim count, with $310K in brand drug costs.
How many Pharmacist providers are there in the US? ▼
There are 291,043 Pharmacist providers across 56 states in the US. The average Pharmacist provider writes 135 Medicare Part D claims per year.
What drugs does Christy Yee, PHARM.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Christy Yee, PHARM.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Metformin Hcl Er, Glipizide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Christy Yee, PHARM.D. accept Medicare? ▼
Christy Yee, PHARM.D. appears in CMS Medicare data with 2,082 Part D claims and 308 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Christy Yee, PHARM.D.'s credentials? ▼
Christy Yee, PHARM.D.'s NPI is 1255424222 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
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.