2026 NPPES data Clinical Informatics (Pathology) Physician NPI 1639691579 MD
Verify on CMS →

JEE HOON JANG, MD

Clinical Informatics (Pathology) Physician in SIMI VALLEY, California. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
5K
Medicare Part D claims · 315 beneficiaries · Clinical Informatics (Pathology) Physician avg: 5K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

JEE HOON JANG, MD filed 5,235 Medicare Part D claims in 2023 as a Clinical Informatics (Pathology) Physician in SIMI VALLEY, California, prescribing 87% generic.

5K
Part D claims, 2023
87%
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.

JEE HOON JANG, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

5,235 Top 6% higher than 94% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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)

JEE HOON JANG, 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 JEE HOON JANG, MD?

Quality data not reported

NPI registry status

Active

Issued 07/12/2017

NPI 1639691579

Primary specialty

Clinical Informatics (Pathology) Physician

Rare

25 US NPIs in this specialty

Medicare Part D claims

5,235 0% vs specialty avg

2023 prescription claims

Specialty avg: 5,235

Specialty distribution in California

How Clinical Informatics (Pathology) Physician compares to other specialties among California providers

California providers

Clinical Informatics (Pathology) Physician share within California

1. Clinical Informatics (Pathology) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Clinical Informatics (Pathology) Physician share within California

Specialty board-certification context

Estimated specialty board-certified rate — Clinical Informatics (Pathology) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Clinical Informatics (Pathology) Physician ABMS/AOA estimate

Est. board-certified rate (Clinical Informatics (Pathology) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Clinical Informatics (Pathology) Physician) — ABMS / AOA estimate

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).

JEE HOON JANG, MD appears in the CMS NPPES registry as a Clinical Informatics (Pathology) Physician provider holding MD credentials at 1424 MADERA RD, SIMI VALLEY, CA, 93065, with a listed phone of (805) 522-5722. NPI 1639691579 was issued on 07/12/2017. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what JANG most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 5,235 prescription claims written by this provider, covering 315 Medicare beneficiaries and totaling roughly $822K in drug spend, split 13% brand-name and 87% generic by claim count, with an opioid prescribing rate of 2.2%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Clinical Informatics (Pathology) Physician is a narrow specialty nationwide, with 25 enrolled providers across 14 states and an average of 5,235 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

1424 MADERA RD
SIMI VALLEY, CA 93065

Provider Details

NPI 1639691579
Specialty Clinical Informatics (Pathology) Physician
Credentials MD
Gender Male
NPI Issued 07/12/2017

Hospital and facility affiliations

Facilities where JEE HOON JANG, 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.

CLINICAS DEL CAMINO REAL INC
SIMI VALLEY, 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 JEE HOON JANG, MD. To verify JEE HOON JANG, 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 · Typical

JEE HOON JANG, MD — brand share 13.0%
Specialty average (est.)

13% brand-name claims vs 87% generic, on 5,235 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.

5,235
Total Claims
$822K
Total Drug Cost
315
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
12,149
Total Day Supply
357,640
Brand vs Generic
13% brand / 87% generic
Brand Drug Cost
$611K
Generic Drug Cost
$206K
Opioid Claims
116 (2.2% rate)
Antibiotic Claims
85

Patient Demographics

Average Patient Age
71.1 years
Avg HCC Risk Score
1.43
Gender Split
51% female / 49% male
Age Distribution
<65: 23, 65-74: 199, 75-84: 75, 85+: 18

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What JEE HOON JANG, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Atorvastatin Calcium
523
Amlodipine Besylate
237
Metformin Hcl
214
Omega-3 Acid Ethyl Esters
170
Losartan Potassium
166
Omeprazole
139
Tamsulosin Hcl
136
Lisinopril
110
Gabapentin
100
Fluticasone Propionate
97

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Clinical Informatics (Pathology) Physician Overview

How JEE HOON JANG, MD fits within the Clinical Informatics (Pathology) Physician landscape nationally.

25
Clinical Informatics (Pathology) Physician Providers in US
14
States with Clinical Informatics (Pathology) Physician
5,235
Avg Claims per Provider

JEE HOON JANG, MD's 5,235 claims are below the specialty average of 5,235.

Nearby Clinical Informatics (Pathology) Physician Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as JANG.

Compare Clinical Informatics (Pathology) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JEE HOON JANG, MD's specialty?
JEE HOON JANG, MD specializes in Clinical Informatics (Pathology) Physician and practices in SIMI VALLEY, California. Credentials: MD.
How much does JEE HOON JANG, MD prescribe under Medicare Part D?
In 2023, JEE HOON JANG, MD wrote 5,235 Medicare Part D claims totaling $822K in drug costs for 315 beneficiaries.
Where is JEE HOON JANG, MD located?
JEE HOON JANG, MD is located at 1424 MADERA RD, SIMI VALLEY, CA, 93065. Phone: (805) 522-5722.
What is JEE HOON JANG, MD's NPI number?
JEE HOON JANG, MD's National Provider Identifier (NPI) is 1639691579, issued on 07/12/2017.
Does JEE HOON JANG, MD prescribe more brand-name or generic drugs?
JEE HOON JANG, MD's prescribing is 13% brand-name and 87% generic drugs by claim count, with $611K in brand drug costs.
Does JEE HOON JANG, MD prescribe opioids?
Yes, JEE HOON JANG, MD had 116 opioid claims in 2023 with an opioid prescribing rate of 2.2%.
How many Clinical Informatics (Pathology) Physician providers are there in the US?
There are 25 Clinical Informatics (Pathology) Physician providers across 14 states in the US. The average Clinical Informatics (Pathology) Physician provider writes 5,235 Medicare Part D claims per year.
What drugs does JEE HOON JANG, MD prescribe most often?
Based on 2023 Medicare Part D data, JEE HOON JANG, MD's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Metformin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JEE HOON JANG, MD accept Medicare?
JEE HOON JANG, MD appears in CMS Medicare data with 5,235 Part D claims and 315 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JEE HOON JANG, MD's credentials?
JEE HOON JANG, MD's NPI is 1639691579 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

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