NPI registry status
Active
2026 NPPES data Neurology Physician NPI 1447202858 MD
Verify on CMS → Jiryung Shim, MD
Neurology Physician in Oakland, 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 19,885 in Neurology 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
385
Medicare Part D claims · 87 beneficiaries · Neurology Physician avg: 1K
Generic prescribing
95%
generic claims · 5% 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
Jiryung Shim, MD filed 385 Medicare Part D claims in 2023 as a Neurology Physician in Oakland, California, prescribing 95% generic.
- 385
- Part D claims, 2023
- 95%
- 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.
Jiryung Shim, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
385 Top 43% higher than 57% 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
✓
Board certification likely (heuristic, not verified)
Jiryung Shim, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Jiryung Shim, MD?
Quality data not reportedPrimary specialty
Neurology Physician
Medicare Part D claims
385 71% vs specialty avg
Specialty distribution in California
How Neurology Physician 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 Neurology Physician. 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).
Jiryung Shim, MD appears in the CMS NPPES registry as a Neurology Physician provider holding MD credentials at 275 W MACARTHUR BLVD, Oakland, CA, 94611, with a listed phone of (510) 752-1000. NPI 1447202858 was issued on 05/16/2006.
Medicare Part D records for calendar year 2023 show 385 prescription claims written by this provider, covering 87 Medicare beneficiaries and totaling roughly $11K in drug spend, split 5% brand-name and 95% generic by claim count.
Neurology Physician is a mid-sized specialty nationwide, with 19,885 enrolled providers across 54 states and an average of 1,309 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 | 1447202858 |
|---|---|
| Specialty | Neurology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 05/16/2006 |
Hospital and facility affiliations
Facilities where Jiryung Shim, MD 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.
Permanente Medical Group Inc
Oakland, CA
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 Jiryung Shim, MD. To verify Jiryung Shim, MD'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 · Generic-heavy
Jiryung Shim, MD - brand share 5.0%
Neurology Physician average
5% brand-name claims vs 95% generic, on 385 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.
385
Total Claims
$11K
Total Drug Cost
87
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 921
- Total Day Supply
- 27,275
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $1K
- Generic Drug Cost
- $10K
Patient Demographics
- Average Patient Age
- 68.3 years
- Avg HCC Risk Score
- 1.12
- Gender Split
- 68% female / 32% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Jiryung Shim, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Venlafaxine Hcl Er
Venlafaxine Hcl Er
34 claims
- Aripiprazole
Aripiprazole
29 claims
- Trazodone Hcl
Trazodone Hcl
29 claims
- Clonazepam
Clonazepam
28 claims
- Bupropion Xl
Bupropion Xl
27 claims
- Duloxetine Hcl
Duloxetine Hcl
23 claims
- Lorazepam
Lorazepam
21 claims
- Fluoxetine Hcl
Fluoxetine Hcl
17 claims
| Drug | Claims |
|---|---|
| Venlafaxine Hcl Er Venlafaxine Hcl | 34 |
| Aripiprazole | 29 |
| Trazodone Hcl | 29 |
| Clonazepam | 28 |
| Bupropion Xl Bupropion Hcl | 27 |
| Duloxetine Hcl | 23 |
| Lorazepam | 21 |
| Fluoxetine Hcl | 17 |
| Dextroamphetamine-Amphet Er Dextroamphetamine/Amphetamine | 16 |
| Quetiapine Fumarate | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Neurology Physician Overview
How Jiryung Shim, MD fits within the Neurology Physician landscape nationally.
19,885
Neurology Physician Providers in US
54
States with Neurology Physician
1,309
Avg Claims per Provider
Jiryung Shim, MD's 385 claims are below the specialty average of 1,309.
Nearby Neurology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Shim.
Dr. Venkat Raghav Aachi
MD
Thousand Oaks, CA
Dr. John Aalbers
M.D.
San Diego, CA
Dr. Puya Abbassi
D.O.
San Jose, CA
Dr. Ahmed Abdelhak
MB CHB
San Francisco, CA
Dr. Justin Abraham
M.D., M.B.A.
Santa Barbara, CA
Compare Neurology 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 Neurology 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 Jiryung Shim, MD's specialty? ▼
Jiryung Shim, MD specializes in Neurology Physician and practices in Oakland, California. Credentials: MD.
How much does Jiryung Shim, MD prescribe under Medicare Part D? ▼
In 2023, Jiryung Shim, MD wrote 385 Medicare Part D claims totaling $11K in drug costs for 87 beneficiaries.
Where is Jiryung Shim, MD located? ▼
Jiryung Shim, MD is located at 275 W MACARTHUR BLVD, Oakland, CA, 94611. Phone: (510) 752-1000.
What is Jiryung Shim, MD's NPI number? ▼
Jiryung Shim, MD's National Provider Identifier (NPI) is 1447202858, issued on 05/16/2006.
Does Jiryung Shim, MD prescribe more brand-name or generic drugs? ▼
Jiryung Shim, MD's prescribing is 5% brand-name and 95% generic drugs by claim count, with $1K in brand drug costs.
How many Neurology Physician providers are there in the US? ▼
There are 19,885 Neurology Physician providers across 54 states in the US. The average Neurology Physician provider writes 1,309 Medicare Part D claims per year.
What drugs does Jiryung Shim, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Jiryung Shim, MD's most frequently prescribed drugs include Venlafaxine Hcl Er, Aripiprazole, Trazodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jiryung Shim, MD accept Medicare? ▼
Jiryung Shim, MD appears in CMS Medicare data with 385 Part D claims and 87 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jiryung Shim, MD's credentials? ▼
Jiryung Shim, MD's NPI is 1447202858 with credentials MD. 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.