NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1508914334 MD
Verify on CMS → Gregory Jung, MD
Emergency Medicine Physician in Baldwin Park, 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 66,293 in Emergency Medicine 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
526
Medicare Part D claims · 367 beneficiaries · Emergency Medicine Physician avg: 355
What the federal data shows
Gregory Jung, MD filed 526 Medicare Part D claims in 2024 as an Emergency Medicine Physician in Baldwin Park, California.
- 526
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥65th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Gregory Jung, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1508914334), first enumerated 01/08/2007.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 526 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Gregory Jung, MD's individual license status. Verify directly with the state medical board.
Source: Medical Board of California annual report FY 2022-23
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Jung with other Emergency Medicine Physician providers
Same primary specialty, same federal CMS NPPES roster.
All 33 Emergency Medicine Physician providers in Baldwin Park, CA →
Also enrolled in California
- Dr. Cooper Aakhus, MD Stanford, CA
- Dr. Pyra Aarden, MD Martinez, CA
- Dr. Neal Aaron, D.O. Encinitas, CA
- Eric Aaserude Walnut Creek, CA
- Dr. Nader Abas, MD Barstow, CA
- Dr. Michael Abbo, MD Novato, CA
Other specialties in Baldwin Park: Pharmacist (117) · Family Medicine Physician (74) · Internal Medicine Physician (60) · Physical Therapist (44)
CMS NPPES provider registry desk
NPI 1508914334 · Emergency Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · RX-LIGHT · BOOK-MID · PHOTO-ENUM
- NPI-10 1508914334
- ENUM-MID 2007
- TAX-MEGA 66K Emergency Medicine
- RX-LIGHT 526
- BOOK-MID 7,133 in California
- PHOTO-ENUM Monika Smith, DO · 2007
Gregory Jung, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
526 ≥ 65th percentile 65% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Gregory Jung, 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 Gregory Jung, MD?
Quality data not reportedPrimary specialty
Emergency Medicine Physician
Medicare Part D claims
526 48% vs specialty avg
Specialty distribution in California
How Emergency Medicine 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 Emergency Medicine 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).
Practice Address
Provider Details
| NPI | 1508914334 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 01/08/2007 |
Hospital and facility affiliations
Facilities where Gregory Jung, 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.
Southern California Permanente Medical Group
Baldwin Park, 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 Medical Board of California, FY 2022-23
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across 148,769 California physician licenses in effect in FY 2022-23 - they are NOT specific to Gregory Jung, MD. To verify Gregory Jung, MD's current license status, use the state board's own license search (see California license lookup), or the Federation of State Medical Boards (FSMB) verification service.
374
Administrative board actions, California FY 2022-23
2.51
Actions per 1,000 physician licenses in effect
California statewide rate
Probation
Most common action type
148 actions
Source: Medical Board of California Annual Report 2022-2023, page 18 (licenses in effect: page 12). Full breakdown by action type on the California discipline page.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
526
Total Claims
$9K
Total Drug Cost
367
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 558
- Total Day Supply
- 6,608
- Generic Drug Cost
- $5K
- Opioid Claims
- 141 (26.8% rate)
- Antibiotic Claims
- 142
Patient Demographics
- Average Patient Age
- 74.7 years
- Avg HCC Risk Score
- 1.84
- Gender Split
- 59% female / 41% male
- Age Distribution
- <65: 30, 65-74: 155, 75-84: 117, 85+: 65
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Gregory Jung, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
94 claims
- Ondansetron Odt
Ondansetron Odt
42 claims
- Ciprofloxacin Hcl
Ciprofloxacin Hcl
39 claims
- Tramadol Hcl 36
Tramadol Hcl
36 claims
- Prednisone 35
Prednisone
35 claims
- Azithromycin 19
Azithromycin
19 claims
- Albuterol Sulfate … 17
Albuterol Sulfate Hfa
17 claims
- Cefadroxil 17
Cefadroxil
17 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 94 |
| Ondansetron Odt Ondansetron | 42 |
| Ciprofloxacin Hcl | 39 |
| Tramadol Hcl | 36 |
| Prednisone | 35 |
| Azithromycin | 19 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 17 |
| Cefadroxil | 17 |
| Clindamycin Hcl | 17 |
| Cephalexin | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Emergency Medicine Physician Overview
How Gregory Jung, MD fits within the Emergency Medicine Physician landscape nationally.
66,293
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
355
Avg Claims per Provider
Gregory Jung, MD's 526 claims are above the specialty average of 355.
Nationwide Emergency Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Jung, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Emergency Medicine Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Jung.
One of 7,133 Emergency Medicine Physician providers enrolled in California, 11 are shown on this page.
Dr. Daniel Abbott
MD
Fullerton, CA
Dr. Paul-Andre Abboud
M.D.
Oakland, CA
Dr. Mostafa Abdel-Hamid
MD
Stanford, CA
Ashraf Abdel-Kerim
Chino, CA
Dr. Diego Abdelnur
M.D.
Hollywood, CA
Compare Emergency Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Gregory Jung, MD's specialty? ▼
Gregory Jung, MD specializes in Emergency Medicine Physician and practices in Baldwin Park, California. Credentials: MD.
How much does Gregory Jung, MD prescribe under Medicare Part D? ▼
In 2024, Gregory Jung, MD wrote 526 Medicare Part D claims totaling $9K in drug costs for 367 beneficiaries.
Where is Gregory Jung, MD located? ▼
Gregory Jung, MD is located at 1011 BALDWIN PARK BLVD, Baldwin Park, CA, 91706. Phone: (626) 851-1011.
What is Gregory Jung, MD's NPI number? ▼
Gregory Jung, MD's National Provider Identifier (NPI) is 1508914334, issued on 01/08/2007.
Does Gregory Jung, MD prescribe opioids? ▼
Yes, Gregory Jung, MD had 141 opioid claims in 2024 with an opioid prescribing rate of 26.8%.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 66,293 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 355 Medicare Part D claims per year.
What drugs does Gregory Jung, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Gregory Jung, MD's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Ondansetron Odt, Ciprofloxacin Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gregory Jung, MD accept Medicare? ▼
Gregory Jung, MD appears in CMS Medicare data with 526 Part D claims and 367 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gregory Jung, MD's credentials? ▼
Gregory Jung, MD's NPI is 1508914334 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 (2024). 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 August 2026 (NPPES) / 2024 (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 September 2026.