NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1114990538 MD
Verify on CMS → Petar Jamborcic, MD
Internal Medicine Physician in Toppenish, Washington.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 174,792 in Internal 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
2K
Medicare Part D claims · 219 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
87%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Petar Jamborcic, MD filed 1,843 Medicare Part D claims in 2024 as an Internal Medicine Physician in Toppenish, Washington, prescribing 87% generic.
- 2K
- Part D claims, 2024
- 87%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥83rd
- 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 Petar Jamborcic, 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 1114990538), first enumerated 02/08/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,843 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
Washington statewide board action statistics are published annually — these figures describe aggregate state activity, not Petar Jamborcic, MD's individual license status. Verify directly with the state medical board.
Source: WMC annual report 2023
- 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 Jamborcic with other Internal Medicine Physician providers
Same primary specialty, same federal CMS NPPES roster.
All 9 Internal Medicine Physician providers in Toppenish, WA →
Also enrolled in Washington
- Dr. Sheida Aalami, M.D. Seattle, WA
- Dr. Barry Aaronson, MD Seattle, WA
- Gloria Abacan Prosser, WA
- Rebecca Abay Seattle, WA
- Dr. Naseer Abbas, MD Tacoma, WA
- Dr. Joel Abbott, D.O. Tacoma, WA
Other specialties in Toppenish: Registered Nurse (30) · Pharmacist (29) · Addiction (Substance Use Disorder) Counselor (24) · Counselor (21)
CMS NPPES provider registry desk
NPI 1114990538 · Internal Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1114990538
- ENUM-LEGACY 2006
- TAX-MEGA 175K Internal Medicine
- RX-MID 1,843
- BOOK-LIGHT 3,888 in Washington
- PHOTO-ENUM Allison Dilks · 2006
Petar Jamborcic, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,843 ≥ 83rd percentile 83% 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)
Petar Jamborcic, 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 Petar Jamborcic, MD?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
1,843 34% vs specialty avg
Specialty distribution in Washington
How Internal Medicine Physician compares to other specialties among Washington 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 Internal 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 | 1114990538 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 02/08/2006 |
Hospital and facility affiliations
Facilities where Petar Jamborcic, 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.
Yakima Valley Memorial Physicians
Yakima, WA
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 - Washington WMC 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 ~34K Washington medical licensees in 2023 - they are NOT specific to Petar Jamborcic, MD. To verify Petar Jamborcic, MD's current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases
WMC 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 Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Petar Jamborcic, MD - brand share 12.0%
Internal Medicine Physician average
12% brand-name claims vs 87% generic, on 1,843 2024 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 2024.
1,843
Total Claims
$131K
Total Drug Cost
219
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,130.4
- Total Day Supply
- 89,709
- Brand vs Generic
- 12% brand / 87% generic
- Brand Drug Cost
- $106K
- Generic Drug Cost
- $23K
- Opioid Claims
- 29 (1.6% rate)
- Antibiotic Claims
- 57
Patient Demographics
- Average Patient Age
- 73.9 years
- Avg HCC Risk Score
- 1.55
- Gender Split
- 43% female / 57% male
- Age Distribution
- <65: 17, 65-74: 111, 75-84: 64, 85+: 27
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Petar Jamborcic, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Lisinopril
Lisinopril
141 claims
- Atorvastatin Calcium
Atorvastatin Calcium
96 claims
- Gabapentin
Gabapentin
81 claims
- Metformin Hcl
Metformin Hcl
69 claims
- Levothyroxine Sodium 55
Levothyroxine Sodium
55 claims
- Amlodipine Besylate 51
Amlodipine Besylate
51 claims
- Eliquis 47
Eliquis
47 claims
- Carvedilol 42
Carvedilol
42 claims
| Drug | Claims |
|---|---|
| Lisinopril | 141 |
| Atorvastatin Calcium | 96 |
| Gabapentin | 81 |
| Metformin Hcl | 69 |
| Levothyroxine Sodium | 55 |
| Amlodipine Besylate | 51 |
| Eliquis Apixaban | 47 |
| Carvedilol | 42 |
| Losartan Potassium | 41 |
| Furosemide | 38 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Petar Jamborcic, MD fits within the Internal Medicine Physician landscape nationally.
174,792
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,785
Avg Claims per Provider
Petar Jamborcic, MD's 1,843 claims are below the specialty average of 2,785.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Jamborcic, both outside Washington so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Internal Medicine Physician Providers in Washington
Other clinicians with the same primary specialty enrolled in Washington, drawn from the same CMS NPPES roster as Jamborcic.
One of 3,888 Internal Medicine Physician providers enrolled in Washington, 11 are shown on this page.
Dr. Jesse Abbott Klafter
M.D.
Renton, WA
Dr. Paul Abdallah
MD
Seattle, WA
Dr. Abir Abdel-Kader
MD
Richland, WA
Dr. Hussein Abdille
MD
Seattle, WA
Dr. Alireza Abdolmohammadi
MD
Tacoma, WA
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Petar Jamborcic, MD's specialty? ▼
Petar Jamborcic, MD specializes in Internal Medicine Physician and practices in Toppenish, Washington. Credentials: MD.
How much does Petar Jamborcic, MD prescribe under Medicare Part D? ▼
In 2024, Petar Jamborcic, MD wrote 1,843 Medicare Part D claims totaling $131K in drug costs for 219 beneficiaries.
Where is Petar Jamborcic, MD located? ▼
Petar Jamborcic, MD is located at 510 W 1ST AVE, Toppenish, WA, 98948. Phone: (509) 865-5600.
What is Petar Jamborcic, MD's NPI number? ▼
Petar Jamborcic, MD's National Provider Identifier (NPI) is 1114990538, issued on 02/08/2006.
Does Petar Jamborcic, MD prescribe more brand-name or generic drugs? ▼
Petar Jamborcic, MD's prescribing is 12% brand-name and 87% generic drugs by claim count, with $106K in brand drug costs.
Does Petar Jamborcic, MD prescribe opioids? ▼
Yes, Petar Jamborcic, MD had 29 opioid claims in 2024 with an opioid prescribing rate of 1.6%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 174,792 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,785 Medicare Part D claims per year.
What drugs does Petar Jamborcic, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Petar Jamborcic, MD's most frequently prescribed drugs include Lisinopril, Atorvastatin Calcium, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Petar Jamborcic, MD accept Medicare? ▼
Petar Jamborcic, MD appears in CMS Medicare data with 1,843 Part D claims and 219 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Petar Jamborcic, MD's credentials? ▼
Petar Jamborcic, MD's NPI is 1114990538 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 August 2026.