NPI registry status
Active
2026 NPPES data Ambulatory Care Pharmacist NPI 1255883542 PHARM.D
Verify on CMS → Thuyvan Phan, PHARM.D
Ambulatory Care Pharmacist in Chapel Hill, North Carolina.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 3,496 in Ambulatory Care 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
102
Medicare Part D claims · 37 beneficiaries · Ambulatory Care Pharmacist avg: 492
Generic prescribing
79%
generic claims · 21% 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
Thuyvan Phan, PHARM.D filed 102 Medicare Part D claims in 2023 as a Ambulatory Care Pharmacist in Chapel Hill, North Carolina, prescribing 79% generic.
- 102
- Part D claims, 2023
- 79%
- 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.
Thuyvan Phan, PHARM.D's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
102 35th percentile higher than 35% 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 Thuyvan Phan, PHARM.D?
Quality data not reportedPrimary specialty
Ambulatory Care Pharmacist
Medicare Part D claims
102 79% vs specialty avg
Specialty distribution in North Carolina
How Ambulatory Care Pharmacist compares to other specialties among North Carolina 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 Ambulatory Care 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).
Thuyvan Phan, PHARM.D appears in the CMS NPPES registry as an Ambulatory Care Pharmacist provider holding PHARM.D credentials at 6013 FARRINGTON RD STE 200, Chapel Hill, NC, 27517, with a listed phone of (919) 962-4824. NPI 1255883542 was issued on 11/02/2016.
Medicare Part D records for calendar year 2023 show 102 prescription claims written by this provider, covering 37 Medicare beneficiaries and totaling roughly $108K in drug spend, split 21% brand-name and 79% generic by claim count.
Ambulatory Care Pharmacist is a narrow specialty nationwide, with 3,496 enrolled providers across 52 states and an average of 492 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 | 1255883542 |
|---|---|
| Specialty | Ambulatory Care Pharmacist |
| Credentials | PHARM.D |
| Gender | Female |
| NPI Issued | 11/02/2016 |
Brand vs generic prescribing mix · Typical
Thuyvan Phan, PHARM.D - brand share 21.0%
Ambulatory Care Pharmacist average
21% brand-name claims vs 79% generic, on 102 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.
102
Total Claims
$108K
Total Drug Cost
37
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 143
- Total Day Supply
- 4,182
- Brand vs Generic
- 21% brand / 79% generic
- Brand Drug Cost
- $105K
- Generic Drug Cost
- $4K
Patient Demographics
- Average Patient Age
- 69.9 years
- Avg HCC Risk Score
- 2.33
- Gender Split
- 57% female / 43% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Thuyvan Phan, PHARM.D prescribes most
Top Medicare Part D drugs by claim count, 2023
- Allopurinol
Allopurinol
36 claims
- Methotrexate 13
Methotrexate
13 claims
- Colchicine 12
Colchicine
12 claims
| Drug | Claims |
|---|---|
| Allopurinol | 36 |
| Methotrexate Methotrexate Sodium | 13 |
| Colchicine | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ambulatory Care Pharmacist Overview
How Thuyvan Phan, PHARM.D fits within the Ambulatory Care Pharmacist landscape nationally.
3,496
Ambulatory Care Pharmacist Providers in US
52
States with Ambulatory Care Pharmacist
492
Avg Claims per Provider
Thuyvan Phan, PHARM.D's 102 claims are below the specialty average of 492.
Nearby Ambulatory Care Pharmacist Providers in North Carolina
Other clinicians with the same primary specialty enrolled in North Carolina, drawn from the same CMS NPPES roster as Phan.
Dr. Anna Abrahamson
PHARMD
Chapel Hill, NC
Dr. Tolulope Alokolaro
RPH
Gastonia, NC
Jade Anderson
Asheville, NC
Safaa Aref
Charlotte, NC
Dr. Morgan Augustine
PHARMD
Durham, NC
Compare Ambulatory Care 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 North Carolina medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Ambulatory Care 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.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
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Explore North Carolina
Frequently Asked Questions
What is Thuyvan Phan, PHARM.D's specialty? ▼
Thuyvan Phan, PHARM.D specializes in Ambulatory Care Pharmacist and practices in Chapel Hill, North Carolina. Credentials: PHARM.D.
How much does Thuyvan Phan, PHARM.D prescribe under Medicare Part D? ▼
In 2023, Thuyvan Phan, PHARM.D wrote 102 Medicare Part D claims totaling $108K in drug costs for 37 beneficiaries.
Where is Thuyvan Phan, PHARM.D located? ▼
Thuyvan Phan, PHARM.D is located at 6013 FARRINGTON RD STE 200, Chapel Hill, NC, 27517. Phone: (919) 962-4824.
What is Thuyvan Phan, PHARM.D's NPI number? ▼
Thuyvan Phan, PHARM.D's National Provider Identifier (NPI) is 1255883542, issued on 11/02/2016.
Does Thuyvan Phan, PHARM.D prescribe more brand-name or generic drugs? ▼
Thuyvan Phan, PHARM.D's prescribing is 21% brand-name and 79% generic drugs by claim count, with $105K in brand drug costs.
How many Ambulatory Care Pharmacist providers are there in the US? ▼
There are 3,496 Ambulatory Care Pharmacist providers across 52 states in the US. The average Ambulatory Care Pharmacist provider writes 492 Medicare Part D claims per year.
What drugs does Thuyvan Phan, PHARM.D prescribe most often? ▼
Based on 2023 Medicare Part D data, Thuyvan Phan, PHARM.D's most frequently prescribed drugs include Allopurinol, Methotrexate, Colchicine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Thuyvan Phan, PHARM.D accept Medicare? ▼
Thuyvan Phan, PHARM.D appears in CMS Medicare data with 102 Part D claims and 37 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Thuyvan Phan, PHARM.D's credentials? ▼
Thuyvan Phan, PHARM.D's NPI is 1255883542 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.