NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1083894844 M.D., M.S.
Verify on CMS → Sun Kim, M.D., M.S.
Endocrinology, Diabetes & Metabolism Physician in Stanford, 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 7,871 in Endocrinology, Diabetes & Metabolism 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
2K
Medicare Part D claims · 184 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
45%
generic claims · 48% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
76.5/100
▼ 7 pts below national avg 83.5 · Above neutral
Industry payments
$17.1K
10 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Sun Kim, M.D., M.S. reported a CMS MIPS final score of 76.5/100 - below the 83.5 national average - and filed 2,334 Medicare Part D claims in 2023.
- 76.5/100
- MIPS score · -7 vs avg
- 2K
- Part D claims, 2023
- 45%
- generic prescribing
- 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.
Sun Kim, M.D., M.S.'s MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
77 17th percentile higher than 17% of 454,083 measured providers
Each bar is a band; taller bars hold more measured 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 Sun Kim, M.D., M.S. sits
This provider among endocrinology, diabetes & metabolism physician peers
Across the 2,341 endocrinology, diabetes & metabolism physician providers who report both Medicare Part D prescribing and a MIPS quality score, Sun Kim, M.D., M.S. writes more Part D claims than 49% of them and scores higher on MIPS quality than 19% - 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 endocrinology, diabetes & metabolism physician peer from a representative sample of 60; the gold marker is Sun Kim, M.D., M.S.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Sun Kim, M.D., M.S. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - 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 Sun Kim, M.D., M.S.?
Below national averagePrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
2,334 12% vs specialty avg
MIPS final score
76.5/100 7 pts vs avg
Specialty distribution in California
How Endocrinology, Diabetes & Metabolism Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Sun Kim, M.D., M.S.'s 2023 MIPS final score plotted against the Endocrinology, Diabetes & Metabolism Physician national average
- MIPS Final Score
- 76.5/100
- vs 83.5 national avg · 2023 performance year
MIPS final score (Endocrinology, Diabetes & Metabolism Physician) - 76.5/100 vs national avg 83.5
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).
Sun Kim, M.D., M.S. appears in the CMS NPPES registry as an Endocrinology, Diabetes & Metabolism Physician provider holding M.D., M.S. credentials at 300 PASTEUR DR RM S025, Stanford, CA, 94305, with a listed phone of (650) 723-8284. NPI 1083894844 was issued on 11/09/2007.
Medicare Part D records for calendar year 2023 show 2,334 prescription claims written by this provider, covering 184 Medicare beneficiaries and totaling roughly $1.6 million in drug spend, split 48% brand-name and 45% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 76.5/100 for the 2023 performance year (Quality 74.3, Cost 44), compared with the 83.5 average among clinicians with a measured score.
Endocrinology, Diabetes & Metabolism Physician is a mid-sized specialty nationwide, with 7,871 enrolled providers across 54 states and an average of 2,639 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 | 1083894844 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | M.D., M.S. |
| Gender | Female |
| NPI Issued | 11/09/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
76.5025
Final Score
Measured-score avg: 83.5
74.3195
Quality
43.9595
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Sun Kim, M.D., M.S. 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.
Stanford Health Care
★★★★★ 5/5
Stanford, CA
Acute Care Hospitals
CMS CCN: 050441
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Sun Kim, M.D., M.S.. Source: openpaymentsdata.cms.gov.
Total received
$17.1K
Largest payer
Novo Nordisk Inc
Most common payment type
Travel and Lodging
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
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 Sun Kim, M.D., M.S.. To verify Sun Kim, M.D., M.S.'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
Sun Kim, M.D., M.S. - brand share 48.0%
Endocrinology, Diabetes & Metabolism Physician average
48% brand-name claims vs 45% generic, on 2,334 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.
2,334
Total Claims
$1.6M
Total Drug Cost
184
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,557
- Total Day Supply
- 165,385
- Brand vs Generic
- 48% brand / 45% generic
- Brand Drug Cost
- $1.5M
- Generic Drug Cost
- $35K
Patient Demographics
- Average Patient Age
- 71.5 years
- Avg HCC Risk Score
- 2.02
- Gender Split
- 48% female / 52% male
- Age Distribution
- <65: 28, 65-74: 92, 75-84: 49, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Sun Kim, M.D., M.S. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Trulicity
Trulicity
164 claims
- Jardiance
Jardiance
153 claims
- Atorvastatin Calcium
Atorvastatin Calcium
130 claims
- Metformin Hcl
Metformin Hcl
126 claims
- Ozempic
Ozempic
116 claims
- Levothyroxine Sodium
Levothyroxine Sodium
87 claims
- Mounjaro
Mounjaro
84 claims
- Pioglitazone Hcl
Pioglitazone Hcl
75 claims
| Drug | Claims |
|---|---|
| Trulicity Dulaglutide | 164 |
| Jardiance Empagliflozin | 153 |
| Atorvastatin Calcium | 130 |
| Metformin Hcl | 126 |
| Ozempic Semaglutide | 116 |
| Levothyroxine Sodium | 87 |
| Mounjaro Tirzepatide | 84 |
| Pioglitazone Hcl | 75 |
| Metformin Hcl Er Metformin Hcl | 72 |
| Glipizide | 70 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Endocrinology, Diabetes & Metabolism Physician in CA →
All providers in California →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Sun Kim, M.D., M.S. fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
7,871
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider
Sun Kim, M.D., M.S.'s 2,334 claims are below the specialty average of 2,639.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Kim.
Dr. Anita Abraham
M.D.
Stockton, CA
Dr. Sallie Adams
M.D.
Roseville, CA
Ananta Addala
Palo Alto, CA
Dr. Helen Adelberg
M.D.
Encino, CA
Dr. David Aftergood
MD
Beverly Hills, CA
Compare Endocrinology, Diabetes & Metabolism 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 Endocrinology, Diabetes & Metabolism 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 Sun Kim, M.D., M.S.'s specialty? ▼
Sun Kim, M.D., M.S. specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Stanford, California. Credentials: M.D., M.S..
How much does Sun Kim, M.D., M.S. prescribe under Medicare Part D? ▼
In 2023, Sun Kim, M.D., M.S. wrote 2,334 Medicare Part D claims totaling $1.6M in drug costs for 184 beneficiaries.
What is Sun Kim, M.D., M.S.'s Medicare quality score? ▼
Sun Kim, M.D., M.S. has a CMS MIPS Final Score of 76.5/100 (Quality: 74.3, Cost: 44). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Sun Kim, M.D., M.S. located? ▼
Sun Kim, M.D., M.S. is located at 300 PASTEUR DR RM S025, Stanford, CA, 94305. Phone: (650) 723-8284.
What is Sun Kim, M.D., M.S.'s NPI number? ▼
Sun Kim, M.D., M.S.'s National Provider Identifier (NPI) is 1083894844, issued on 11/09/2007.
Does Sun Kim, M.D., M.S. prescribe more brand-name or generic drugs? ▼
Sun Kim, M.D., M.S.'s prescribing is 48% brand-name and 45% generic drugs by claim count, with $1.5M in brand drug costs.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 7,871 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,639 Medicare Part D claims per year.
What drugs does Sun Kim, M.D., M.S. prescribe most often? ▼
Based on 2023 Medicare Part D data, Sun Kim, M.D., M.S.'s most frequently prescribed drugs include Trulicity, Jardiance, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Sun Kim, M.D., M.S. accept Medicare? ▼
Sun Kim, M.D., M.S. appears in CMS Medicare data with 2,334 Part D claims and 184 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Sun Kim, M.D., M.S.'s credentials? ▼
Sun Kim, M.D., M.S.'s NPI is 1083894844 with credentials M.D., M.S.. 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
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.