NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1134315872 M.D.
Verify on CMS → Philip Isenberg, M.D.
Internal Medicine Physician in Midvale, Utah.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 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
6K
Medicare Part D claims · 586 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
84%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
95.7/100
▲ 12 pts above national avg 83.5 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Philip Isenberg, M.D. reported a CMS MIPS final score of 95.7/100 - above the 83.5 national average - and filed 6,301 Medicare Part D claims in 2023.
- 95.7/100
- MIPS score · +12 vs avg
- 6K
- Part D claims, 2023
- 84%
- 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.
CMS NPPES provider registry desk
NPI 1134315872 · Internal Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · MIPS-ELITE · RX-MID · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1134315872
- ENUM-MID 2007
- TAX-MEGA 173K Internal Medicine
- MIPS-ELITE 95.7/100
- RX-MID 6,301
- BOOK-LIGHT 982 in Utah
- PHOTO-FINISH John Berquist · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Isenberg · this …
Isenberg · this provider
95.7 MIPS pts
- Michael Pestotni…
Michael Pestotnik
95.7 MIPS pts
- John Berquist · …
John Berquist
95.7 MIPS pts
- Kimberly Jensen …
Kimberly Jensen
95.7 MIPS pts
- Hena Kundra · near
Hena Kundra
95.7 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Philip Isenberg, M.D.'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.
96 ≥ 78th percentile 78% of 454,083 measured providers are in lower value bands
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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Philip Isenberg, M.D. sits
This provider among internal medicine physician peers
Across the 34,612 internal medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, Philip Isenberg, M.D. writes more Part D claims than 85% of them and scores higher on MIPS quality than 82% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one internal medicine physician peer from a representative sample of 60; the gold marker is Philip Isenberg, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Philip Isenberg, M.D. 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 Philip Isenberg, M.D.?
High performer (top quartile)Primary specialty
Internal Medicine Physician
Medicare Part D claims
6,301 132% vs specialty avg
MIPS final score
95.7/100 12.2 pts vs avg
Specialty distribution in Utah
How Internal Medicine Physician compares to other specialties among Utah providers
Medicare quality performance, MIPS
Philip Isenberg, M.D.'s 2023 MIPS final score plotted against the Internal Medicine Physician national average
- MIPS Final Score
- 95.7/100
- vs 83.5 national avg · 2023 performance year
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 | 1134315872 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 09/17/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
95.7054
Final Score
Measured-score avg: 83.5
92.1917
Quality
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Philip Isenberg, M.D. 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.
Kaiser Foundation Health Plan OF Washington
Port Orchard, 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).
Brand vs generic prescribing mix · Typical
Philip Isenberg, M.D. - brand share 15.0%
Internal Medicine Physician average
15% brand-name claims vs 84% generic, on 6,301 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.
6,301
Total Claims
$697K
Total Drug Cost
586
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 14,198
- Total Day Supply
- 412,123
- Brand vs Generic
- 15% brand / 84% generic
- Brand Drug Cost
- $576K
- Generic Drug Cost
- $119K
- Opioid Claims
- 159 (2.5% rate)
- Antibiotic Claims
- 78
Patient Demographics
- Average Patient Age
- 72.7 years
- Avg HCC Risk Score
- 1.19
- Gender Split
- 52% female / 48% male
- Age Distribution
- <65: 68, 65-74: 257, 75-84: 204, 85+: 57
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Philip Isenberg, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Omeprazole
Omeprazole
300 claims
- Atorvastatin Calcium
Atorvastatin Calcium
281 claims
- Amlodipine Besylate
Amlodipine Besylate
219 claims
- Levothyroxine Sodium
Levothyroxine Sodium
213 claims
- Lisinopril
Lisinopril
209 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
180 claims
- Metformin Hcl
Metformin Hcl
160 claims
- Gabapentin
Gabapentin
121 claims
| Drug | Claims |
|---|---|
| Omeprazole | 300 |
| Atorvastatin Calcium | 281 |
| Amlodipine Besylate | 219 |
| Levothyroxine Sodium | 213 |
| Lisinopril | 209 |
| Rosuvastatin Calcium | 180 |
| Metformin Hcl | 160 |
| Gabapentin | 121 |
| Metoprolol Succinate | 113 |
| Losartan Potassium | 108 |
* 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 Philip Isenberg, M.D. fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Philip Isenberg, M.D.'s 6,301 claims are above the specialty average of 2,716.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Isenberg, both outside Utah so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (95.7 here).
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Internal Medicine Physician Providers in Utah
Other clinicians with the same primary specialty enrolled in Utah, drawn from the same CMS NPPES roster as Isenberg.
One of 982 Internal Medicine Physician providers enrolled in Utah, 5 are shown here.
Dr. Zameer Abedin
MD
Salt Lake City, UT
Dr. Scott Aberegg
MD
Murray, UT
Dr. Anu Abraham
MD
Salt Lake City, UT
Dr. Abdulelah Abu Qare
MD
Layton, UT
Dr. Conrad Addison
MD
Salt Lake City, UT
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Philip Isenberg, M.D.'s specialty? ▼
Philip Isenberg, M.D. specializes in Internal Medicine Physician and practices in Midvale, Utah. Credentials: M.D..
How much does Philip Isenberg, M.D. prescribe under Medicare Part D? ▼
In 2023, Philip Isenberg, M.D. wrote 6,301 Medicare Part D claims totaling $697K in drug costs for 586 beneficiaries.
What is Philip Isenberg, M.D.'s Medicare quality score? ▼
Philip Isenberg, M.D. has a CMS MIPS Final Score of 95.7/100 (Quality: 92.2). 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 Philip Isenberg, M.D. located? ▼
Philip Isenberg, M.D. is located at 7495 S STATE ST, Midvale, UT, 84047. Phone: (801) 213-9400.
What is Philip Isenberg, M.D.'s NPI number? ▼
Philip Isenberg, M.D.'s National Provider Identifier (NPI) is 1134315872, issued on 09/17/2007.
Does Philip Isenberg, M.D. prescribe more brand-name or generic drugs? ▼
Philip Isenberg, M.D.'s prescribing is 15% brand-name and 84% generic drugs by claim count, with $576K in brand drug costs.
Does Philip Isenberg, M.D. prescribe opioids? ▼
Yes, Philip Isenberg, M.D. had 159 opioid claims in 2023 with an opioid prescribing rate of 2.5%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Philip Isenberg, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Philip Isenberg, M.D.'s most frequently prescribed drugs include Omeprazole, Atorvastatin Calcium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Philip Isenberg, M.D. accept Medicare? ▼
Philip Isenberg, M.D. appears in CMS Medicare data with 6,301 Part D claims and 586 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Philip Isenberg, M.D.'s credentials? ▼
Philip Isenberg, M.D.'s NPI is 1134315872 with credentials M.D.. 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.