NPI registry status
Active
2026 NPPES data Dermatology Physician NPI 1326579160 MD, PHD
Verify on CMS → Courtney Johnson, MD, PHD
Dermatology Physician in Duarte, 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 14,645 in Dermatology 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
51
Medicare Part D claims · 28 beneficiaries · Dermatology Physician avg: 729
MIPS score
74.4/100
▼ 9 pts below national avg 83.1 · Mid-tier
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Courtney Johnson, MD, PHD reported a CMS MIPS final score of 74.4/100 - below the 83.1 national average - and filed 51 Medicare Part D claims in 2023.
- 74.4/100
- MIPS score · -9 vs avg
- 51
- Part D claims, 2023
- Likely
- board-certified (heuristic)
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.
Courtney Johnson, MD, PHD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
74 12th percentile higher than 12% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Courtney Johnson, MD, PHD sits
This provider among dermatology physician peers
Across the 6,594 dermatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Courtney Johnson, MD, PHD writes more Part D claims than 2% of them and scores higher on MIPS quality than 15% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one dermatology physician peer from a representative sample of 60; the gold marker is Courtney Johnson, MD, PHD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Courtney Johnson, MD, PHD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations - 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 Courtney Johnson, MD, PHD?
Below national averagePrimary specialty
Dermatology Physician
Medicare Part D claims
51 93% vs specialty avg
MIPS final score
74.4/100 8.7 pts vs avg
Specialty distribution in California
How Dermatology Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Courtney Johnson, MD, PHD's 2023 MIPS final score plotted against the Dermatology Physician national average
- MIPS Final Score
- 74.4/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Dermatology Physician) - 74.4/100 vs national avg 83.1
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).
Courtney Johnson, MD, PHD appears in the CMS NPPES registry as a Dermatology Physician provider holding MD, PHD credentials at 1500 DUARTE RD, Duarte, CA, 91010, with a listed phone of (800) 826-4673. NPI 1326579160 was issued on 03/23/2017.
Medicare Part D records for calendar year 2023 show 51 prescription claims written by this provider, covering 28 Medicare beneficiaries and totaling roughly $16K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 74.4/100 for the 2023 performance year (Quality 64.7, Cost 52.4), compared with the national average of 83.1.
Dermatology Physician is a mid-sized specialty nationwide, with 14,645 enrolled providers across 53 states and an average of 729 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 | 1326579160 |
|---|---|
| Specialty | Dermatology Physician |
| Credentials | MD, PHD |
| Gender | Female |
| NPI Issued | 03/23/2017 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
74.3962
Final Score
Avg: 83.1
64.7185
Quality
52.4354
Cost
97
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Courtney Johnson, MD, PHD 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.
City OF Hope Medical Foundation
Duarte, CA
Johns Hopkins University
Columbia, MD
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 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 Courtney Johnson, MD, PHD. To verify Courtney Johnson, MD, PHD'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
51
Total Claims
$16K
Total Drug Cost
28
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 55
- Total Day Supply
- 1,467
- Generic Drug Cost
- $15K
Patient Demographics
- Average Patient Age
- 67.3 years
- Avg HCC Risk Score
- 1.28
Dermatology Physician Overview
How Courtney Johnson, MD, PHD fits within the Dermatology Physician landscape nationally.
14,645
Dermatology Physician Providers in US
53
States with Dermatology Physician
729
Avg Claims per Provider
Courtney Johnson, MD, PHD's 51 claims are below the specialty average of 729.
Nearby Dermatology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Johnson.
Dr. Sumaira Aasi
MD
Stanford, CA
Dr. Christopher Abbott
M.D.
San Diego, CA
Dr. Eman Abdallah
D.O.
Los Angeles, CA
Dr. Farah Abdulla
MD
Duarte, CA
Dr. Sayyida Abdus-Salaam
M.D.
Daly City, CA
Compare Dermatology Physician 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 Dermatology Physician 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 Courtney Johnson, MD, PHD's specialty? ▼
Courtney Johnson, MD, PHD specializes in Dermatology Physician and practices in Duarte, California. Credentials: MD, PHD.
How much does Courtney Johnson, MD, PHD prescribe under Medicare Part D? ▼
In 2023, Courtney Johnson, MD, PHD wrote 51 Medicare Part D claims totaling $16K in drug costs for 28 beneficiaries.
What is Courtney Johnson, MD, PHD's Medicare quality score? ▼
Courtney Johnson, MD, PHD has a CMS MIPS Final Score of 74.4/100 (Quality: 64.7, Cost: 52.4). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Courtney Johnson, MD, PHD located? ▼
Courtney Johnson, MD, PHD is located at 1500 DUARTE RD, Duarte, CA, 91010. Phone: (800) 826-4673.
What is Courtney Johnson, MD, PHD's NPI number? ▼
Courtney Johnson, MD, PHD's National Provider Identifier (NPI) is 1326579160, issued on 03/23/2017.
How many Dermatology Physician providers are there in the US? ▼
There are 14,645 Dermatology Physician providers across 53 states in the US. The average Dermatology Physician provider writes 729 Medicare Part D claims per year.
Does Courtney Johnson, MD, PHD accept Medicare? ▼
Courtney Johnson, MD, PHD appears in CMS Medicare data with 51 Part D claims and 28 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Courtney Johnson, MD, PHD's credentials? ▼
Courtney Johnson, MD, PHD's NPI is 1326579160 with credentials MD, PHD. 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.